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Dolby Dagmar

Disclosed activity across 1 company

Tapewire entity
18687
SEC CIK
0001537372

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
Dolby Laboratories, Inc.DLB · Entity 251810% ownerOctober 02, 2026October 02, 2026

Disclosed balances

About these balances

Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Class B Common StockSEC Table II · derivative / convertible securityIndirectBy a trust0 Reported balance After 2026-10-02 transaction · row 1 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 1 · 2026-10-02 · Gift · Disposed 24,108,162 · Balance 0

F1: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F2: On October 2, 2026, the Marital Trust (as defined below) transferred 24,108,162 shares of Class B Common Stock to the Dagmar Dolby Trust (as defined below). Such share transfer was effected solely for tax and estate planning purposes, and was a transfer for no value without the payment or receipt of any funds or other consideration by any reporting person in exchange therefor. As a change in form of indirect beneficial ownership only, the share transfer would be exempt from the reporting requirements of Section 16(a) and the provisions of Section 16(b) of the Act. The reporting persons are voluntarily reporting the share transfer on this Form 4.

F3: Reflects shares of Class B Common Stock held of record by Dagmar Dolby as the Trustee of the Marital Trust under the Dolby Family Trust instrument, dated May 7, 1999 (the "Marital Trust"), voting power of which is shared by the Trustee and David E. Dolby as Special Trustee of the Marital Trust. This report is filed jointly by Dagmar Dolby and the Marital Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust.The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

Class B Common StockSEC Table II · derivative / convertible securityIndirectBy a trust28,480,279 Reported balance After 2026-10-02 transaction · row 2 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 2 · 2026-10-02 · Gift · Acquired 24,108,162 · Balance 28,480,279

F1: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F2: On October 2, 2026, the Marital Trust (as defined below) transferred 24,108,162 shares of Class B Common Stock to the Dagmar Dolby Trust (as defined below). Such share transfer was effected solely for tax and estate planning purposes, and was a transfer for no value without the payment or receipt of any funds or other consideration by any reporting person in exchange therefor. As a change in form of indirect beneficial ownership only, the share transfer would be exempt from the reporting requirements of Section 16(a) and the provisions of Section 16(b) of the Act. The reporting persons are voluntarily reporting the share transfer on this Form 4.

F4: Reflects shares held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust Instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power of which is shared by the Trustee and David E. Dolby, son of Dagmar Dolby, as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

Class B Common StockSEC Table II · derivative / convertible securityIndirectBy Trust160,592 Reported balance Holding disclosure · report date 2026-10-02 · row 3 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 3 · Balance 160,592

F1: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F5: Reflects shares of Class B Common Stock (convertible into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Ray Dolby 2002 Trust A, dated April 19, 2002 (the "Ray Dolby 2002 Trust A"), voting power of which is held by Thomas E. Dolby, son of Dagmar Dolby, as Special Trustee of the Ray Dolby 2002 Trust A. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

Class B Common StockSEC Table II · derivative / convertible securityIndirectBy Trust463,262 Reported balance Holding disclosure · report date 2026-10-02 · row 4 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 4 · Balance 463,262

F1: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F6: Reflects shares of Class B Common Stock (convertible into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Ray Dolby 2002 Trust B, dated April 19, 2002 (the "Ray Dolby 2002 Trust B"), voting power of which is held by David E. Dolby, as Special Trustee of the Ray Dolby 2002 Trust B. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

Class B Common StockSEC Table II · derivative / convertible securityIndirectBy Trust403,600 Reported balance Holding disclosure · report date 2026-10-02 · row 5 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 5 · Balance 403,600

F1: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F7: Reflects shares of Class B Common Stock (convertible into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby 2016 Trust B, dated March 23, 2016 (the "Dagmar Dolby 2016 Trust B"), voting power of which is held by David E. Dolby as Special Trustee of the Dagmar Dolby 2016 Trust B. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

Class B Common StockSEC Table II · derivative / convertible securityIndirectBy Trust1,000,000 Reported balance Holding disclosure · report date 2026-10-02 · row 8 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 8 · Balance 1,000,000

F1: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F10: Reflects shares of Class B Common Stock (convertible into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby 2026 Trust AA, dated February 25, 2026 (the "Dagmar Dolby 2026 Trust AA"), voting power over which is held by David E. Dolby as Special Trustee of the Dagmar Dolby 2026 Trust AA. This report is filed by Dagmar Dolby with respect to the securities held by the Dagmar Dolby 2026 Trust AA. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

Class B Common StockSEC Table II · derivative / convertible securityIndirectBy Trust1,000,000 Reported balance Holding disclosure · report date 2026-10-02 · row 9 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 9 · Balance 1,000,000

F1: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F11: Reflects shares of Class B Common Stock (convertible into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby 2026 Trust AA-2, dated August 25, 2026 (the "Dagmar Dolby 2026 Trust AA-2"), voting power over which is held by David E. Dolby as Special Trustee of the Dagmar Dolby 2026 Trust AA-2. This report is filed by Dagmar Dolby with respect to the securities held by the Dagmar Dolby 2026 Trust AA-2. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

Class B Common StockSEC Table II · derivative / convertible securityIndirectBy Trust1,000,000 Reported balance Holding disclosure · report date 2026-10-02 · row 10 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 10 · Balance 1,000,000

F1: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F12: Reflects shares of Class B Common Stock (convertible into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby 2026 Trust BB, dated August 25, 2026 (the "Dagmar Dolby 2026 Trust BB"), voting power over which is held by David E. Dolby as Special Trustee of the Dagmar Dolby 2026 Trust BB. This report is filed by Dagmar Dolby with respect to the securities held by the Dagmar Dolby 2026 Trust BB. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

Class B Common StockSEC Table II · derivative / convertible securityIndirectBy LLC1,040,000 Reported balance Holding disclosure · report date 2026-10-02 · row 6 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 6 · Balance 1,040,000

F1: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F8: Reflects shares of Class B Common Stock (convertible into a like number of shares of Class A Common Stock) held of record by Dolby Holdings II LLC, a limited liability company ("Dolby Holdings II"), investment power over which is held by Dagmar Dolby, manager of Dolby Holdings II, and voting power over which is held by (i) Thomas E. Dolby, a Special Manager of Dolby Holdings II, with respect to 50% of such shares, and (ii) David E. Dolby, a Special Manager of Dolby Holdings II, with respect to 50% of such shares. This report is filed by Dagmar Dolby with respect to the securities held by Dolby Holdings II. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein

Class B Common StockSEC Table II · derivative / convertible securityIndirectBy LLC350,000 Reported balance Holding disclosure · report date 2026-10-02 · row 7 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 7 · Balance 350,000

F1: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F9: Reflects shares of Class B Common Stock (convertible into a like number of shares of Class A Common Stock) held of record by Dolby Holdings III LLC, a limited liability company ("Dolby Holdings III"), investment power over which is held by Dagmar Dolby, the manager of Dolby Holdings III, and voting power over which is held by David E. Dolby, the Special Manager of Dolby Holdings III. This report is filed by Dagmar Dolby with respect to the securities held by Dolby Holdings III. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

Filing footnotes · ownership attribution and instrument terms

F1: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F2: On October 2, 2026, the Marital Trust (as defined below) transferred 24,108,162 shares of Class B Common Stock to the Dagmar Dolby Trust (as defined below). Such share transfer was effected solely for tax and estate planning purposes, and was a transfer for no value without the payment or receipt of any funds or other consideration by any reporting person in exchange therefor. As a change in form of indirect beneficial ownership only, the share transfer would be exempt from the reporting requirements of Section 16(a) and the provisions of Section 16(b) of the Act. The reporting persons are voluntarily reporting the share transfer on this Form 4.

F3: Reflects shares of Class B Common Stock held of record by Dagmar Dolby as the Trustee of the Marital Trust under the Dolby Family Trust instrument, dated May 7, 1999 (the "Marital Trust"), voting power of which is shared by the Trustee and David E. Dolby as Special Trustee of the Marital Trust. This report is filed jointly by Dagmar Dolby and the Marital Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust.The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

F4: Reflects shares held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust Instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power of which is shared by the Trustee and David E. Dolby, son of Dagmar Dolby, as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

F5: Reflects shares of Class B Common Stock (convertible into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Ray Dolby 2002 Trust A, dated April 19, 2002 (the "Ray Dolby 2002 Trust A"), voting power of which is held by Thomas E. Dolby, son of Dagmar Dolby, as Special Trustee of the Ray Dolby 2002 Trust A. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

F6: Reflects shares of Class B Common Stock (convertible into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Ray Dolby 2002 Trust B, dated April 19, 2002 (the "Ray Dolby 2002 Trust B"), voting power of which is held by David E. Dolby, as Special Trustee of the Ray Dolby 2002 Trust B. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

F7: Reflects shares of Class B Common Stock (convertible into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby 2016 Trust B, dated March 23, 2016 (the "Dagmar Dolby 2016 Trust B"), voting power of which is held by David E. Dolby as Special Trustee of the Dagmar Dolby 2016 Trust B. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

F8: Reflects shares of Class B Common Stock (convertible into a like number of shares of Class A Common Stock) held of record by Dolby Holdings II LLC, a limited liability company ("Dolby Holdings II"), investment power over which is held by Dagmar Dolby, manager of Dolby Holdings II, and voting power over which is held by (i) Thomas E. Dolby, a Special Manager of Dolby Holdings II, with respect to 50% of such shares, and (ii) David E. Dolby, a Special Manager of Dolby Holdings II, with respect to 50% of such shares. This report is filed by Dagmar Dolby with respect to the securities held by Dolby Holdings II. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein

F9: Reflects shares of Class B Common Stock (convertible into a like number of shares of Class A Common Stock) held of record by Dolby Holdings III LLC, a limited liability company ("Dolby Holdings III"), investment power over which is held by Dagmar Dolby, the manager of Dolby Holdings III, and voting power over which is held by David E. Dolby, the Special Manager of Dolby Holdings III. This report is filed by Dagmar Dolby with respect to the securities held by Dolby Holdings III. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

F10: Reflects shares of Class B Common Stock (convertible into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby 2026 Trust AA, dated February 25, 2026 (the "Dagmar Dolby 2026 Trust AA"), voting power over which is held by David E. Dolby as Special Trustee of the Dagmar Dolby 2026 Trust AA. This report is filed by Dagmar Dolby with respect to the securities held by the Dagmar Dolby 2026 Trust AA. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

F11: Reflects shares of Class B Common Stock (convertible into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby 2026 Trust AA-2, dated August 25, 2026 (the "Dagmar Dolby 2026 Trust AA-2"), voting power over which is held by David E. Dolby as Special Trustee of the Dagmar Dolby 2026 Trust AA-2. This report is filed by Dagmar Dolby with respect to the securities held by the Dagmar Dolby 2026 Trust AA-2. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

F12: Reflects shares of Class B Common Stock (convertible into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby 2026 Trust BB, dated August 25, 2026 (the "Dagmar Dolby 2026 Trust BB"), voting power over which is held by David E. Dolby as Special Trustee of the Dagmar Dolby 2026 Trust BB. This report is filed by Dagmar Dolby with respect to the securities held by the Dagmar Dolby 2026 Trust BB. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

Transaction history

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Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.

Transaction dateCompanyActivity / securityShares / unitsReported priceReported valueDetails
October 02, 2026 Filed Oct 2, 2026 22:42 UTC Dolby Laboratories, Inc. DLB · Entity 2518 GiftClass B Common Stock · Derivative 24,108,162 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-412706 · ownership.xml · derivative · entry 2

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

MARITAL TRUST UNDER DOLBY FAMILY TRUST DATED MAY 7, 1999 · CIK 0001598817 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By a trust

Disclosed balance after: 28,480,279

Underlying: Class A Common Stock · 24,108,162 shares

Expires not disclosed

F1 · derivative.exercise_price: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F2 · kind: On October 2, 2026, the Marital Trust (as defined below) transferred 24,108,162 shares of Class B Common Stock to the Dagmar Dolby Trust (as defined below). Such share transfer was effected solely for tax and estate planning purposes, and was a transfer for no value without the payment or receipt of any funds or other consideration by any reporting person in exchange therefor. As a change in form of indirect beneficial ownership only, the share transfer would be exempt from the reporting requirements of Section 16(a) and the provisions of Section 16(b) of the Act. The reporting persons are voluntarily reporting the share transfer on this Form 4.

F1 · derivative.exercise_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F1 · derivative.expiration_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F4 · ownership.nature: Reflects shares held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust Instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power of which is shared by the Trustee and David E. Dolby, son of Dagmar Dolby, as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

Read SEC document
October 02, 2026 Filed Oct 2, 2026 22:42 UTC Dolby Laboratories, Inc. DLB · Entity 2518 GiftClass B Common Stock · Derivative 24,108,162 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-412706 · ownership.xml · derivative · entry 1

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

MARITAL TRUST UNDER DOLBY FAMILY TRUST DATED MAY 7, 1999 · CIK 0001598817 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By a trust

Disclosed balance after: 0

Underlying: Class A Common Stock · 24,108,162 shares

Expires not disclosed

F1 · derivative.exercise_price: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F2 · kind: On October 2, 2026, the Marital Trust (as defined below) transferred 24,108,162 shares of Class B Common Stock to the Dagmar Dolby Trust (as defined below). Such share transfer was effected solely for tax and estate planning purposes, and was a transfer for no value without the payment or receipt of any funds or other consideration by any reporting person in exchange therefor. As a change in form of indirect beneficial ownership only, the share transfer would be exempt from the reporting requirements of Section 16(a) and the provisions of Section 16(b) of the Act. The reporting persons are voluntarily reporting the share transfer on this Form 4.

F1 · derivative.exercise_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F1 · derivative.expiration_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F3 · ownership.nature: Reflects shares of Class B Common Stock held of record by Dagmar Dolby as the Trustee of the Marital Trust under the Dolby Family Trust instrument, dated May 7, 1999 (the "Marital Trust"), voting power of which is shared by the Trustee and David E. Dolby as Special Trustee of the Marital Trust. This report is filed jointly by Dagmar Dolby and the Marital Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust.The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

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August 28, 2026 Filed Aug 28, 2026 22:02 UTC Dolby Laboratories, Inc. DLB · Entity 2518 ConversionClass B Common Stock · Derivative 300,000 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-374860 · ownership.xml · derivative · entry 6

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By Trust

Disclosed balance after: 4,372,117

Underlying: Class A Common Stock · 300,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F2 · kind: On August 28, 2026, the Dagmar Dolby Trust (as defined below) converted 300,000 shares of Class B Common Stock into a like number of shares of Class A Common Stock and gifted all such shares of Class A Common Stock to an unaffiliated charitable organization. The gift transaction is exempt from Section 16(b) by virtue of Rule 16b-5 promulgated under the Securities Exchange Act of 1934, as amended (the "Act").

F4 · derivative.exercise_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F4 · derivative.expiration_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F3 · ownership.nature: Reflects shares held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust Instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power of which is shared by the Trustee and David E. Dolby, son of Dagmar Dolby, as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

Read SEC document
August 28, 2026 Filed Aug 28, 2026 22:02 UTC Dolby Laboratories, Inc. DLB · Entity 2518 GiftClass B Common Stock · Derivative 1,000,000 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-374860 · ownership.xml · derivative · entry 5

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By a trust

Disclosed balance after: 1,000,000

Underlying: Class A Common Stock · 1,000,000 shares

Expires not disclosed

F4 · derivative.exercise_price: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F5 · kind: On August 28, 2026, the Dagmar Dolby Trust contributed a total of 2,000,000 shares of Class B Common Stock: 1,000,000 to a newly formed grantor retained annuity trust, the Dagmar Dolby 2026 Trust AA-2 (as defined below) and 1,000,000 to a newly formed grantor retained annuity trust, the Dagmar Dolby 2026 Trust BB (as defined below). Such share contributions were effected solely for tax and estate planning purposes, and were each a transfer for no value without the payment or receipt of any funds or other consideration by any reporting person in exchange therefor. As such a change in form of indirect beneficial ownership only, applicable rules consider each a share contribution to be exempt from the reporting requirements of Section 16(a) and the provisions of Section 16(b) of the Act, and as a result the reporting persons are voluntarily reporting such share contribution on this Form 4.

F4 · derivative.exercise_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F4 · derivative.expiration_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F7 · ownership.nature: Reflects shares of Class B Common Stock (convertible into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby 2026 Trust BB, dated August 25, 2026 (the "Dagmar Dolby 2026 Trust BB"), voting power over which is held by David E. Dolby as Special Trustee of the Dagmar Dolby 2026 Trust BB. This report is filed by Dagmar Dolby with respect to the securities held by the Dagmar Dolby 2026 Trust BB. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

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August 28, 2026 Filed Aug 28, 2026 22:02 UTC Dolby Laboratories, Inc. DLB · Entity 2518 GiftClass B Common Stock · Derivative 1,000,000 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-374860 · ownership.xml · derivative · entry 4

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By a trust

Disclosed balance after: 1,000,000

Underlying: Class A Common Stock · 1,000,000 shares

Expires not disclosed

F4 · derivative.exercise_price: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F5 · kind: On August 28, 2026, the Dagmar Dolby Trust contributed a total of 2,000,000 shares of Class B Common Stock: 1,000,000 to a newly formed grantor retained annuity trust, the Dagmar Dolby 2026 Trust AA-2 (as defined below) and 1,000,000 to a newly formed grantor retained annuity trust, the Dagmar Dolby 2026 Trust BB (as defined below). Such share contributions were effected solely for tax and estate planning purposes, and were each a transfer for no value without the payment or receipt of any funds or other consideration by any reporting person in exchange therefor. As such a change in form of indirect beneficial ownership only, applicable rules consider each a share contribution to be exempt from the reporting requirements of Section 16(a) and the provisions of Section 16(b) of the Act, and as a result the reporting persons are voluntarily reporting such share contribution on this Form 4.

F4 · derivative.exercise_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F4 · derivative.expiration_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F6 · ownership.nature: Reflects shares of Class B Common Stock (convertible into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby 2026 Trust AA-2, dated August 25, 2026 (the "Dagmar Dolby 2026 Trust AA-2"), voting power over which is held by David E. Dolby as Special Trustee of the Dagmar Dolby 2026 Trust AA-2. This report is filed by Dagmar Dolby with respect to the securities held by the Dagmar Dolby 2026 Trust AA-2. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

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August 28, 2026 Filed Aug 28, 2026 22:02 UTC Dolby Laboratories, Inc. DLB · Entity 2518 GiftClass B Common Stock · Derivative 2,000,000 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-374860 · ownership.xml · derivative · entry 3

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By a trust

Disclosed balance after: 4,672,117

Underlying: Class A Common Stock · 2,000,000 shares

Expires not disclosed

F4 · derivative.exercise_price: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F5 · kind: On August 28, 2026, the Dagmar Dolby Trust contributed a total of 2,000,000 shares of Class B Common Stock: 1,000,000 to a newly formed grantor retained annuity trust, the Dagmar Dolby 2026 Trust AA-2 (as defined below) and 1,000,000 to a newly formed grantor retained annuity trust, the Dagmar Dolby 2026 Trust BB (as defined below). Such share contributions were effected solely for tax and estate planning purposes, and were each a transfer for no value without the payment or receipt of any funds or other consideration by any reporting person in exchange therefor. As such a change in form of indirect beneficial ownership only, applicable rules consider each a share contribution to be exempt from the reporting requirements of Section 16(a) and the provisions of Section 16(b) of the Act, and as a result the reporting persons are voluntarily reporting such share contribution on this Form 4.

F4 · derivative.exercise_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F4 · derivative.expiration_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F3 · ownership.nature: Reflects shares held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust Instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power of which is shared by the Trustee and David E. Dolby, son of Dagmar Dolby, as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

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August 28, 2026 Filed Aug 28, 2026 22:02 UTC Dolby Laboratories, Inc. DLB · Entity 2518 GiftClass A Common Stock 300,000 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-374860 · ownership.xml · nonDerivative · entry 2

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By Trust

Disclosed balance after: 0

F2 · kind: On August 28, 2026, the Dagmar Dolby Trust (as defined below) converted 300,000 shares of Class B Common Stock into a like number of shares of Class A Common Stock and gifted all such shares of Class A Common Stock to an unaffiliated charitable organization. The gift transaction is exempt from Section 16(b) by virtue of Rule 16b-5 promulgated under the Securities Exchange Act of 1934, as amended (the "Act").

F3 · ownership.nature: Reflects shares held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust Instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power of which is shared by the Trustee and David E. Dolby, son of Dagmar Dolby, as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

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August 28, 2026 Filed Aug 28, 2026 22:02 UTC Dolby Laboratories, Inc. DLB · Entity 2518 ConversionClass A Common Stock 300,000 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-374860 · ownership.xml · nonDerivative · entry 1

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By Trust

Disclosed balance after: 300,000

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · security: Each share of Class A Common Stock was issued upon conversion of one share of Class B Common Stock at the election of, and at no cost to, the reporting person.

F2 · kind: On August 28, 2026, the Dagmar Dolby Trust (as defined below) converted 300,000 shares of Class B Common Stock into a like number of shares of Class A Common Stock and gifted all such shares of Class A Common Stock to an unaffiliated charitable organization. The gift transaction is exempt from Section 16(b) by virtue of Rule 16b-5 promulgated under the Securities Exchange Act of 1934, as amended (the "Act").

F3 · ownership.nature: Reflects shares held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust Instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power of which is shared by the Trustee and David E. Dolby, son of Dagmar Dolby, as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

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February 25, 2026 Filed Feb 27, 2026 22:00 UTC Dolby Laboratories, Inc. DLB · Entity 2518 ConversionClass B Common Stock · Derivative 10,000 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-083094 · ownership.xml · derivative · entry 5

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By Trust

Disclosed balance after: 6,672,117

Underlying: Class A Common Stock · 10,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F2 · kind: On February 25, 2025, the Dagmar Dolby Trust (as defined below) converted 10,000 shares of Class B Common Stock into a like number of shares of Class A Common Stock and gifted all such shares of Class A Common Stock to an unaffiliated charitable organization. The gift transaction is exempt from Section 16(b) by virtue of Rule 16b-5 promulgated under the Act.

F4 · derivative.exercise_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F4 · derivative.expiration_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F3 · ownership.nature: Reflects shares held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust Instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power of which is shared by the Trustee and David E. Dolby, son of Dagmar Dolby, as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

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February 25, 2026 Filed Feb 27, 2026 22:00 UTC Dolby Laboratories, Inc. DLB · Entity 2518 GiftClass B Common Stock · Derivative 1,000,000 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-083094 · ownership.xml · derivative · entry 4

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By a trust

Disclosed balance after: 1,000,000

Underlying: Class A Common Stock · 1,000,000 shares

Expires not disclosed

F4 · derivative.exercise_price: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F5 · kind: On February 25, 2026, the Dagmar Dolby Trust contributed 1,000,000 shares of Class B Common Stock to a newly formed grantor retained annuity trust, the Dagmar Dolby 2026 Trust AA (as defined below). Such share contribution was effected solely for tax and estate planning purposes, and was a transfer for no value without the payment or receipt of any funds or other consideration by any reporting person in exchange therefor. As a change in form of indirect beneficial ownership only, applicable rules consider such a share contribution to be exempt from the reporting requirements of Section 16(a) and the provisions of Section 16(b) of the Act, and as a result the reporting persons are voluntarily reporting such share contribution on this Form 4.

F4 · derivative.exercise_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F4 · derivative.expiration_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F6 · ownership.nature: Reflects shares of Class B Common Stock (convertible into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby 2026 Trust AA, dated February 25, 2026 (the "Dagmar Dolby 2026 Trust AA"), voting power over which is held by David E. Dolby as Special Trustee of the Dagmar Dolby 2026 Trust AA. This report is filed by Dagmar Dolby with respect to the securities held by the Dagmar Dolby 2026 Trust AA. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

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February 25, 2026 Filed Feb 27, 2026 22:00 UTC Dolby Laboratories, Inc. DLB · Entity 2518 GiftClass B Common Stock · Derivative 1,000,000 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-083094 · ownership.xml · derivative · entry 3

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By a trust

Disclosed balance after: 6,682,117

Underlying: Class A Common Stock · 1,000,000 shares

Expires not disclosed

F4 · derivative.exercise_price: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F5 · kind: On February 25, 2026, the Dagmar Dolby Trust contributed 1,000,000 shares of Class B Common Stock to a newly formed grantor retained annuity trust, the Dagmar Dolby 2026 Trust AA (as defined below). Such share contribution was effected solely for tax and estate planning purposes, and was a transfer for no value without the payment or receipt of any funds or other consideration by any reporting person in exchange therefor. As a change in form of indirect beneficial ownership only, applicable rules consider such a share contribution to be exempt from the reporting requirements of Section 16(a) and the provisions of Section 16(b) of the Act, and as a result the reporting persons are voluntarily reporting such share contribution on this Form 4.

F4 · derivative.exercise_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F4 · derivative.expiration_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F3 · ownership.nature: Reflects shares held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust Instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power of which is shared by the Trustee and David E. Dolby, son of Dagmar Dolby, as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

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February 25, 2026 Filed Feb 27, 2026 22:00 UTC Dolby Laboratories, Inc. DLB · Entity 2518 GiftClass A Common Stock 10,000 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-083094 · ownership.xml · nonDerivative · entry 2

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By Trust

Disclosed balance after: 0

F2 · kind: On February 25, 2025, the Dagmar Dolby Trust (as defined below) converted 10,000 shares of Class B Common Stock into a like number of shares of Class A Common Stock and gifted all such shares of Class A Common Stock to an unaffiliated charitable organization. The gift transaction is exempt from Section 16(b) by virtue of Rule 16b-5 promulgated under the Act.

F3 · ownership.nature: Reflects shares held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust Instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power of which is shared by the Trustee and David E. Dolby, son of Dagmar Dolby, as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

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February 25, 2026 Filed Feb 27, 2026 22:00 UTC Dolby Laboratories, Inc. DLB · Entity 2518 ConversionClass A Common Stock 10,000 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-083094 · ownership.xml · nonDerivative · entry 1

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By Trust

Disclosed balance after: 10,000

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · security: Each share of Class A Common Stock was issued upon conversion of one share of Class B Common Stock at the election of, and at no cost to, the reporting person.

F2 · kind: On February 25, 2025, the Dagmar Dolby Trust (as defined below) converted 10,000 shares of Class B Common Stock into a like number of shares of Class A Common Stock and gifted all such shares of Class A Common Stock to an unaffiliated charitable organization. The gift transaction is exempt from Section 16(b) by virtue of Rule 16b-5 promulgated under the Act.

F3 · ownership.nature: Reflects shares held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust Instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power of which is shared by the Trustee and David E. Dolby, son of Dagmar Dolby, as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

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February 11, 2026 Filed Feb 13, 2026 21:30 UTC Dolby Laboratories, Inc. DLB · Entity 2518 ConversionClass B Common Stock · Derivative 380,000 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-051551 · ownership.xml · derivative · entry 3

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By Trust

Disclosed balance after: 7,682,117

Underlying: Class A Common Stock · 380,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F2 · kind: On February 11, 2026, the Dagmar Dolby Trust (as defined below) converted 380,000 shares of Class B Common Stock into a like number of shares of Class A Common Stock and gifted all such shares of Class A Common Stock to an unaffiliated charitable organization. The conversion transactions are exempt from Section 16(b) of the Securities Exchange Act of 1934 (the "Act") pursuant to Rule 16b-6(b) promulgated under the Act. The gift transaction is exempt from Section 16(b) by virtue of Rule 16b-5 promulgated under the Act.

F4 · derivative.exercise_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F4 · derivative.expiration_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F3 · ownership.nature: Reflects shares of Class B Common Stock (as converted or convertible, as applicable, into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power of which is shared by the Trustee and David E. Dolby as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

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February 11, 2026 Filed Feb 13, 2026 21:30 UTC Dolby Laboratories, Inc. DLB · Entity 2518 GiftClass A Common Stock 380,000 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-051551 · ownership.xml · nonDerivative · entry 2

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By Trust

Disclosed balance after: 0

F2 · kind: On February 11, 2026, the Dagmar Dolby Trust (as defined below) converted 380,000 shares of Class B Common Stock into a like number of shares of Class A Common Stock and gifted all such shares of Class A Common Stock to an unaffiliated charitable organization. The conversion transactions are exempt from Section 16(b) of the Securities Exchange Act of 1934 (the "Act") pursuant to Rule 16b-6(b) promulgated under the Act. The gift transaction is exempt from Section 16(b) by virtue of Rule 16b-5 promulgated under the Act.

F3 · ownership.nature: Reflects shares of Class B Common Stock (as converted or convertible, as applicable, into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power of which is shared by the Trustee and David E. Dolby as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

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February 11, 2026 Filed Feb 13, 2026 21:30 UTC Dolby Laboratories, Inc. DLB · Entity 2518 ConversionClass A Common Stock 380,000 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-051551 · ownership.xml · nonDerivative · entry 1

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By Trust

Disclosed balance after: 380,000

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · security: Each share of Class A Common Stock was issued upon conversion of one share of Class B Common Stock at the election of, and at no cost to, the reporting person.

F2 · kind: On February 11, 2026, the Dagmar Dolby Trust (as defined below) converted 380,000 shares of Class B Common Stock into a like number of shares of Class A Common Stock and gifted all such shares of Class A Common Stock to an unaffiliated charitable organization. The conversion transactions are exempt from Section 16(b) of the Securities Exchange Act of 1934 (the "Act") pursuant to Rule 16b-6(b) promulgated under the Act. The gift transaction is exempt from Section 16(b) by virtue of Rule 16b-5 promulgated under the Act.

F3 · ownership.nature: Reflects shares of Class B Common Stock (as converted or convertible, as applicable, into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power of which is shared by the Trustee and David E. Dolby as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

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February 19, 2025 Filed Feb 21, 2025 22:00 UTC Dolby Laboratories, Inc. DLB · Entity 2518 ConversionClass B Common Stock · Derivative 510,000 $0.00 $0.00
Disclosure

SEC source: 0000950170-25-024962 · ownership.xml · derivative · entry 3

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By Trust

Disclosed balance after: 8,062,117

Underlying: Class A Common Stock · 510,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F2 · kind: On February 19, 2025, the Dagmar Dolby Trust (as defined below) converted 510,000 shares of Class B Common Stock into a like number of shares of Class A Common Stock and gifted all such shares of Class A Common Stock to unaffiliated charitable organizations.

F4 · derivative.exercise_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F4 · derivative.expiration_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F3 · ownership.nature: Reflects shares of Class B Common Stock (as converted or convertible, as applicable, into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power of which is shared by the Trustee and David E. Dolby as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

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February 19, 2025 Filed Feb 21, 2025 22:00 UTC Dolby Laboratories, Inc. DLB · Entity 2518 GiftClass A Common Stock 510,000 $0.00 $0.00
Disclosure

SEC source: 0000950170-25-024962 · ownership.xml · nonDerivative · entry 2

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By Trust

Disclosed balance after: 0

F2 · kind: On February 19, 2025, the Dagmar Dolby Trust (as defined below) converted 510,000 shares of Class B Common Stock into a like number of shares of Class A Common Stock and gifted all such shares of Class A Common Stock to unaffiliated charitable organizations.

F3 · ownership.nature: Reflects shares of Class B Common Stock (as converted or convertible, as applicable, into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power of which is shared by the Trustee and David E. Dolby as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

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February 19, 2025 Filed Feb 21, 2025 22:00 UTC Dolby Laboratories, Inc. DLB · Entity 2518 ConversionClass A Common Stock 510,000 $0.00 $0.00
Disclosure

SEC source: 0000950170-25-024962 · ownership.xml · nonDerivative · entry 1

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By Trust

Disclosed balance after: 510,000

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · security: Each share of Class A Common Stock was issued upon conversion of one share of Class B Common Stock at the election of, and at no cost to, the reporting person.

F2 · kind: On February 19, 2025, the Dagmar Dolby Trust (as defined below) converted 510,000 shares of Class B Common Stock into a like number of shares of Class A Common Stock and gifted all such shares of Class A Common Stock to unaffiliated charitable organizations.

F3 · ownership.nature: Reflects shares of Class B Common Stock (as converted or convertible, as applicable, into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power of which is shared by the Trustee and David E. Dolby as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

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November 21, 2024 Filed Nov 22, 2024 23:00 UTC Dolby Laboratories, Inc. DLB · Entity 2518 ConversionClass B Common Stock · Derivative 500,000 $0.00 $0.00
Disclosure

SEC source: 0000950170-24-130315 · ownership.xml · derivative · entry 3

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By Trust

Disclosed balance after: 8,572,117

Underlying: Class A Common Stock · 500,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F2 · kind: On November 21, 2024, the Dagmar Dolby Trust (as defined below) converted 500,000 shares of Class B Common Stock into a like number of shares of Class A Common Stock and gifted all such shares of Class A Common Stock to an unaffiliated charitable organization.

F4 · derivative.exercise_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F4 · derivative.expiration_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F3 · ownership.nature: Reflects shares of Class B Common Stock (as converted or convertible, as applicable, into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power of which is shared by the Trustee and David E. Dolby as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

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November 21, 2024 Filed Nov 22, 2024 23:00 UTC Dolby Laboratories, Inc. DLB · Entity 2518 GiftClass A Common Stock 500,000 $0.00 $0.00
Disclosure

SEC source: 0000950170-24-130315 · ownership.xml · nonDerivative · entry 2

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By Trust

Disclosed balance after: 0

F2 · kind: On November 21, 2024, the Dagmar Dolby Trust (as defined below) converted 500,000 shares of Class B Common Stock into a like number of shares of Class A Common Stock and gifted all such shares of Class A Common Stock to an unaffiliated charitable organization.

F3 · ownership.nature: Reflects shares of Class B Common Stock (as converted or convertible, as applicable, into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power of which is shared by the Trustee and David E. Dolby as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

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November 21, 2024 Filed Nov 22, 2024 23:00 UTC Dolby Laboratories, Inc. DLB · Entity 2518 ConversionClass A Common Stock 500,000 $0.00 $0.00
Disclosure

SEC source: 0000950170-24-130315 · ownership.xml · nonDerivative · entry 1

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By Trust

Disclosed balance after: 500,000

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · security: Each share of Class A Common Stock was issued upon conversion of one share of Class B Common Stock at the election of, and at no cost to, the reporting person.

F2 · kind: On November 21, 2024, the Dagmar Dolby Trust (as defined below) converted 500,000 shares of Class B Common Stock into a like number of shares of Class A Common Stock and gifted all such shares of Class A Common Stock to an unaffiliated charitable organization.

F3 · ownership.nature: Reflects shares of Class B Common Stock (as converted or convertible, as applicable, into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power of which is shared by the Trustee and David E. Dolby as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

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May 13, 2024 Filed May 16, 2024 00:22 UTC Dolby Laboratories, Inc. DLB · Entity 2518 ConversionClass B Common Stock · Derivative 415,000 $0.00 $0.00
Disclosure

SEC source: 0000950170-24-060752 · ownership.xml · derivative · entry 3

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By Trust

Disclosed balance after: 9,072,117

Underlying: Class A Common Stock · 415,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F2 · kind: On May 13, 2024, the Dagmar Dolby Trust (as defined below) converted 415,000 shares of Class B Common Stock into a like number of shares of Class A Common Stock and gifted all such shares of Class A Common Stock to an unaffiliated charitable organization.

F4 · derivative.exercise_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F4 · derivative.expiration_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F3 · ownership.nature: Reflects shares of Class B Common Stock (as converted or convertible, as applicable, into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power of which is shared by the Trustee and David E. Dolby as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

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May 13, 2024 Filed May 16, 2024 00:22 UTC Dolby Laboratories, Inc. DLB · Entity 2518 GiftClass B Common Stock 415,000 $0.00 $0.00
Disclosure

SEC source: 0000950170-24-060752 · ownership.xml · nonDerivative · entry 2

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By Trust

Disclosed balance after: 0

F2 · kind: On May 13, 2024, the Dagmar Dolby Trust (as defined below) converted 415,000 shares of Class B Common Stock into a like number of shares of Class A Common Stock and gifted all such shares of Class A Common Stock to an unaffiliated charitable organization.

F3 · ownership.nature: Reflects shares of Class B Common Stock (as converted or convertible, as applicable, into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power of which is shared by the Trustee and David E. Dolby as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

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May 13, 2024 Filed May 16, 2024 00:22 UTC Dolby Laboratories, Inc. DLB · Entity 2518 ConversionClass B Common Stock 415,000 $0.00 $0.00
Disclosure

SEC source: 0000950170-24-060752 · ownership.xml · nonDerivative · entry 1

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By Trust

Disclosed balance after: 415,000

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · security: Each share of Class A Common Stock was issued upon conversion of one share of Class B Common Stock at the election of, and at no cost to, the reporting person.

F2 · kind: On May 13, 2024, the Dagmar Dolby Trust (as defined below) converted 415,000 shares of Class B Common Stock into a like number of shares of Class A Common Stock and gifted all such shares of Class A Common Stock to an unaffiliated charitable organization.

F3 · ownership.nature: Reflects shares of Class B Common Stock (as converted or convertible, as applicable, into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power of which is shared by the Trustee and David E. Dolby as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

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November 29, 2021 Filed Dec 1, 2021 02:14 UTC Dolby Laboratories, Inc. DLB · Entity 2518 OtherClass B Common Stock · Derivative 1,427,000 $85.64 $122,201,145.00
Disclosure

SEC source: 0001209191-21-067228 · doc4.xml · derivative · entry 4

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 9,487,117

Underlying: Class A Common Stock · 1,427,000 shares

Expires not disclosed

F1 · derivative.exercise_price: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F5 · kind: On November 29, 2021, 1,427,000 shares of Class B Common Stock that were previously held indirectly by the Dagmar Dolby 2020 Trust BB-2 were transferred to the Dagmar Dolby Trust in exchange for assets of equal value. As such, these securities are beneficially owned by the Dagmar Dolby Trust.

F6 · price: The shares exchanged from the Dagmar Dolby 2020 Trust BB-2 were valued at $85.635 per share, the mean of the high and low trading price for the Class A Common Stock on November 29, 2021, for such purpose.

F1 · derivative.exercise_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F1 · derivative.expiration_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F4 · ownership.nature: Reflects shares of Class B Common Stock (as converted or convertible, as applicable, into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power over which is shared by the Trustee and David E. Dolby as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting persons disclaim beneficial ownership of these securities except to the extent of their respective pecuniary interest therein.

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November 29, 2021 Filed Dec 1, 2021 02:14 UTC Dolby Laboratories, Inc. DLB · Entity 2518 OtherClass B Common Stock · Derivative 1,427,000 $85.64 $122,201,145.00
Disclosure

SEC source: 0001209191-21-067228 · doc4.xml · derivative · entry 3

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 0

Underlying: Class A Common Stock · 1,427,000 shares

Expires not disclosed

F1 · derivative.exercise_price: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F5 · kind: On November 29, 2021, 1,427,000 shares of Class B Common Stock that were previously held indirectly by the Dagmar Dolby 2020 Trust BB-2 were transferred to the Dagmar Dolby Trust in exchange for assets of equal value. As such, these securities are beneficially owned by the Dagmar Dolby Trust.

F6 · price: The shares exchanged from the Dagmar Dolby 2020 Trust BB-2 were valued at $85.635 per share, the mean of the high and low trading price for the Class A Common Stock on November 29, 2021, for such purpose.

F1 · derivative.exercise_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F1 · derivative.expiration_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F3 · ownership.nature: Reflects shares of Class B Common Stock (convertible into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby 2020 Trust BB-2, dated November 18, 2020 (the "Dagmar Dolby 2020 Trust BB-2"), voting power over which is held by David E. Dolby, son of Dagmar Dolby, as Special Trustee of the Dagmar Dolby 2020 Trust BB-2. This report is filed by Dagmar Dolby with respect to the securities held by the Dagmar Dolby 2020 Trust BB-2. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

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November 29, 2021 Filed Dec 1, 2021 02:14 UTC Dolby Laboratories, Inc. DLB · Entity 2518 GiftClass B Common Stock · Derivative 1,573,000 $0.00 $0.00
Disclosure

SEC source: 0001209191-21-067228 · doc4.xml · derivative · entry 2

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 8,060,117

Underlying: Class A Common Stock · 1,573,000 shares

Expires not disclosed

F1 · derivative.exercise_price: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F2 · kind: On November 29, 2021, the Dagmar Dolby 2020 Trust BB-2 (as defined below), which is a grantor retained annuity trust, transferred 1,573,000 shares of Class B Common Stock to the Dagmar Dolby Trust (as defined below). Such share transfer was effected in satisfaction of the annuity payment requirements, and in accordance with the terms, of the Dagmar Dolby 2020-B Trust BB's trust instrument, and was a transfer for no value without the payment or receipt of any funds or other consideration by any reporting person in exchange therefor. Applicable rules consider such a share transfer to be exempt from the reporting requirements of Section 16(a) and the provisions of Section 16(b) of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), and as a result the reporting persons are voluntarily reporting such share transfer on this Form 4.

F1 · derivative.exercise_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F1 · derivative.expiration_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F4 · ownership.nature: Reflects shares of Class B Common Stock (as converted or convertible, as applicable, into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power over which is shared by the Trustee and David E. Dolby as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting persons disclaim beneficial ownership of these securities except to the extent of their respective pecuniary interest therein.

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November 29, 2021 Filed Dec 1, 2021 02:14 UTC Dolby Laboratories, Inc. DLB · Entity 2518 GiftClass B Common Stock · Derivative 1,573,000 $0.00 $0.00
Disclosure

SEC source: 0001209191-21-067228 · doc4.xml · derivative · entry 1

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 1,427,000

Underlying: Class A Common Stock · 1,573,000 shares

Expires not disclosed

F1 · derivative.exercise_price: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F2 · kind: On November 29, 2021, the Dagmar Dolby 2020 Trust BB-2 (as defined below), which is a grantor retained annuity trust, transferred 1,573,000 shares of Class B Common Stock to the Dagmar Dolby Trust (as defined below). Such share transfer was effected in satisfaction of the annuity payment requirements, and in accordance with the terms, of the Dagmar Dolby 2020-B Trust BB's trust instrument, and was a transfer for no value without the payment or receipt of any funds or other consideration by any reporting person in exchange therefor. Applicable rules consider such a share transfer to be exempt from the reporting requirements of Section 16(a) and the provisions of Section 16(b) of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), and as a result the reporting persons are voluntarily reporting such share transfer on this Form 4.

F1 · derivative.exercise_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F1 · derivative.expiration_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F3 · ownership.nature: Reflects shares of Class B Common Stock (convertible into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby 2020 Trust BB-2, dated November 18, 2020 (the "Dagmar Dolby 2020 Trust BB-2"), voting power over which is held by David E. Dolby, son of Dagmar Dolby, as Special Trustee of the Dagmar Dolby 2020 Trust BB-2. This report is filed by Dagmar Dolby with respect to the securities held by the Dagmar Dolby 2020 Trust BB-2. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

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June 01, 2021 Filed Jun 3, 2021 22:07 UTC Dolby Laboratories, Inc. DLB · Entity 2518 ConversionClass B Common Stock · Derivative 21,000 $0.00 $0.00
Disclosure

SEC source: 0001209191-21-037860 · doc4.xml · derivative · entry 3

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 6,487,117

Underlying: Class A Common Stock · 21,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F2 · kind: On June 1, 2021, the Dagmar Dolby Trust (as defined below) converted 21,000 shares of Class B Common Stock into a like number of shares of Class A Common Stock and gifted all such shares of Class A Common Stock to an unaffiliated charitable organization.

F4 · derivative.exercise_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F4 · derivative.expiration_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F3 · ownership.nature: Reflects shares of Class B Common Stock (as converted or convertible, as applicable, into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power over which is shared by the Trustee and David E. Dolby, son of Dagmar Dolby, as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting persons disclaim beneficial ownership of these securities except to the extent of their respective pecuniary interest therein.

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June 01, 2021 Filed Jun 3, 2021 22:07 UTC Dolby Laboratories, Inc. DLB · Entity 2518 GiftClass A Common Stock 21,000 $0.00 $0.00
Disclosure

SEC source: 0001209191-21-037860 · doc4.xml · nonDerivative · entry 2

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 0

F2 · kind: On June 1, 2021, the Dagmar Dolby Trust (as defined below) converted 21,000 shares of Class B Common Stock into a like number of shares of Class A Common Stock and gifted all such shares of Class A Common Stock to an unaffiliated charitable organization.

F3 · ownership.nature: Reflects shares of Class B Common Stock (as converted or convertible, as applicable, into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power over which is shared by the Trustee and David E. Dolby, son of Dagmar Dolby, as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting persons disclaim beneficial ownership of these securities except to the extent of their respective pecuniary interest therein.

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June 01, 2021 Filed Jun 3, 2021 22:07 UTC Dolby Laboratories, Inc. DLB · Entity 2518 ConversionClass A Common Stock 21,000 $0.00 $0.00
Disclosure

SEC source: 0001209191-21-037860 · doc4.xml · nonDerivative · entry 1

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 21,000

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · security: Each share of Class A Common Stock issued upon conversion of one share of Class B Common Stock at the election of, and at no cost to, the holder.

F2 · kind: On June 1, 2021, the Dagmar Dolby Trust (as defined below) converted 21,000 shares of Class B Common Stock into a like number of shares of Class A Common Stock and gifted all such shares of Class A Common Stock to an unaffiliated charitable organization.

F3 · ownership.nature: Reflects shares of Class B Common Stock (as converted or convertible, as applicable, into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power over which is shared by the Trustee and David E. Dolby, son of Dagmar Dolby, as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting persons disclaim beneficial ownership of these securities except to the extent of their respective pecuniary interest therein.

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March 17, 2021 Filed Mar 17, 2021 20:03 UTC Dolby Laboratories, Inc. DLB · Entity 2518 ConversionClass B Common Stock · Derivative 18,500 $0.00 $0.00
Disclosure

SEC source: 0001209191-21-021297 · doc4.xml · derivative · entry 3

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 6,508,117

Underlying: Class A Common Stock · 18,500 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F2 · kind: On March 17, 2021, the Dagmar Dolby Trust (as defined below) converted 18,500 shares of Class B Common Stock into a like number of shares of Class A Common Stock and gifted all such shares of Class A Common Stock to an unaffiliated charitable organization.

F4 · derivative.exercise_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F4 · derivative.expiration_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F3 · ownership.nature: Reflects shares of Class B Common Stock (as converted or convertible, as applicable, into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power over which is shared by the Trustee and David E. Dolby, son of Dagmar Dolby, as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting persons disclaim beneficial ownership of these securities except to the extent of their respective pecuniary interest therein.

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March 17, 2021 Filed Mar 17, 2021 20:03 UTC Dolby Laboratories, Inc. DLB · Entity 2518 GiftClass A Common Stock 18,500 $0.00 $0.00
Disclosure

SEC source: 0001209191-21-021297 · doc4.xml · nonDerivative · entry 2

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 0

F2 · kind: On March 17, 2021, the Dagmar Dolby Trust (as defined below) converted 18,500 shares of Class B Common Stock into a like number of shares of Class A Common Stock and gifted all such shares of Class A Common Stock to an unaffiliated charitable organization.

F3 · ownership.nature: Reflects shares of Class B Common Stock (as converted or convertible, as applicable, into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power over which is shared by the Trustee and David E. Dolby, son of Dagmar Dolby, as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting persons disclaim beneficial ownership of these securities except to the extent of their respective pecuniary interest therein.

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March 17, 2021 Filed Mar 17, 2021 20:03 UTC Dolby Laboratories, Inc. DLB · Entity 2518 ConversionClass A Common Stock 18,500 $0.00 $0.00
Disclosure

SEC source: 0001209191-21-021297 · doc4.xml · nonDerivative · entry 1

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 18,500

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · security: Each share of Class A Common Stock issued upon conversion of one share of Class B Common Stock at the election of, and at no cost to, the holder.

F2 · kind: On March 17, 2021, the Dagmar Dolby Trust (as defined below) converted 18,500 shares of Class B Common Stock into a like number of shares of Class A Common Stock and gifted all such shares of Class A Common Stock to an unaffiliated charitable organization.

F3 · ownership.nature: Reflects shares of Class B Common Stock (as converted or convertible, as applicable, into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power over which is shared by the Trustee and David E. Dolby, son of Dagmar Dolby, as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting persons disclaim beneficial ownership of these securities except to the extent of their respective pecuniary interest therein.

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November 18, 2020 Filed Nov 20, 2020 21:27 UTC Dolby Laboratories, Inc. DLB · Entity 2518 GiftClass B Common Stock · Derivative 3,000,000 $0.00 $0.00
Disclosure

SEC source: 0001209191-20-059653 · doc4.xml · derivative · entry 4

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 3,000,000

Underlying: Class A Common Stock · 3,000,000 shares

Expires not disclosed

F1 · derivative.exercise_price: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F6 · kind: On November 18, 2020, the Dagmar Dolby Trust contributed 3,000,000 shares of Class B Common Stock to a newly formed grantor retained annuity trust, the Dagmar Dolby 2020 Trust BB-2 (as defined below). Such share contribution was effected solely for tax and estate planning purposes, and was a transfer for no value without the payment or receipt of any funds or other consideration by any reporting person in exchange therefor. Applicable rules consider such a share contribution to be exempt from the reporting requirements of Section 16(a) and the provisions of Section 16(b) of the Securities Exchange Act of 1934, and as a result the reporting persons are voluntarily reporting such share contribution on this Form 4.

F1 · derivative.exercise_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F1 · derivative.expiration_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F7 · ownership.nature: Reflects shares of Class B Common Stock (convertible into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby 2020 Trust BB-2, dated November 18, 2020 (the "Dagmar Dolby 2020 Trust BB-2"), voting power over which is held by David E. Dolby as Special Trustee of the Dagmar Dolby 2020 Trust BB-2. This report is filed by Dagmar Dolby with respect to the securities held by the Dagmar Dolby 2020 Trust BB-2. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

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November 18, 2020 Filed Nov 20, 2020 21:27 UTC Dolby Laboratories, Inc. DLB · Entity 2518 GiftClass B Common Stock · Derivative 3,000,000 $0.00 $0.00
Disclosure

SEC source: 0001209191-20-059653 · doc4.xml · derivative · entry 3

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 6,526,617

Underlying: Class A Common Stock · 3,000,000 shares

Expires not disclosed

F1 · derivative.exercise_price: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F6 · kind: On November 18, 2020, the Dagmar Dolby Trust contributed 3,000,000 shares of Class B Common Stock to a newly formed grantor retained annuity trust, the Dagmar Dolby 2020 Trust BB-2 (as defined below). Such share contribution was effected solely for tax and estate planning purposes, and was a transfer for no value without the payment or receipt of any funds or other consideration by any reporting person in exchange therefor. Applicable rules consider such a share contribution to be exempt from the reporting requirements of Section 16(a) and the provisions of Section 16(b) of the Securities Exchange Act of 1934, and as a result the reporting persons are voluntarily reporting such share contribution on this Form 4.

F1 · derivative.exercise_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F1 · derivative.expiration_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F4 · ownership.nature: Reflects shares of Class B Common Stock (as converted or convertible, as applicable, into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power over which is shared by the Trustee and David E. Dolby, son of Dagmar Dolby, as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting persons disclaim beneficial ownership of these securities except to the extent of their respective pecuniary interest therein.

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November 18, 2020 Filed Nov 20, 2020 21:27 UTC Dolby Laboratories, Inc. DLB · Entity 2518 OtherClass B Common Stock · Derivative 1,800,000 $89.36 $160,839,000.00
Disclosure

SEC source: 0001209191-20-059653 · doc4.xml · derivative · entry 2

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 9,526,617

Underlying: Class A Common Stock · 1,900,000 shares

Expires not disclosed

F1 · derivative.exercise_price: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F5 · kind: On November 18, 2020, 1,800,000 shares of Class B Common Stock that were previously held indirectly by the Dagmar Dolby 2019 Trust BB (as defined below) were transferred to the Dagmar Dolby Trust in exchange for assets of equal value. As such, these securities are beneficially owned by the Dagmar Dolby Trust.

F3 · price: The shares exchanged from the Dagmar Dolby 2020 Trust BB were valued at $89.355 per share, the mean of the high and low trading price for the Class A Common Stock on November 18, 2020, for such purpose.

F1 · derivative.exercise_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F1 · derivative.expiration_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F4 · ownership.nature: Reflects shares of Class B Common Stock (as converted or convertible, as applicable, into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power over which is shared by the Trustee and David E. Dolby, son of Dagmar Dolby, as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting persons disclaim beneficial ownership of these securities except to the extent of their respective pecuniary interest therein.

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November 18, 2020 Filed Nov 20, 2020 21:27 UTC Dolby Laboratories, Inc. DLB · Entity 2518 OtherClass B Common Stock · Derivative 1,300,000 $89.36 $116,161,500.00
Disclosure

SEC source: 0001209191-20-059653 · doc4.xml · derivative · entry 1

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 7,726,617

Underlying: Class A Common Stock · 1,300,000 shares

Expires not disclosed

F1 · derivative.exercise_price: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F2 · kind: On November 18, 2020, 1,300,000 shares of Class B Common Stock that were previously held indirectly by the Dagmar Dolby 2020 Trust BB (as defined below) were transferred to the Dagmar Dolby Trust (as defined below) in exchange for assets of equal value. As such, these securities are beneficially owned by the Dagmar Dolby Trust.

F3 · price: The shares exchanged from the Dagmar Dolby 2020 Trust BB were valued at $89.355 per share, the mean of the high and low trading price for the Class A Common Stock on November 18, 2020, for such purpose.

F1 · derivative.exercise_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F1 · derivative.expiration_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F4 · ownership.nature: Reflects shares of Class B Common Stock (as converted or convertible, as applicable, into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power over which is shared by the Trustee and David E. Dolby, son of Dagmar Dolby, as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting persons disclaim beneficial ownership of these securities except to the extent of their respective pecuniary interest therein.

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September 25, 2020 Filed Sep 26, 2020 01:45 UTC Dolby Laboratories, Inc. DLB · Entity 2518 GiftClass B Common Stock · Derivative 1,900,000 $0.00 $0.00
Disclosure

SEC source: 0001209191-20-052161 · doc4.xml · derivative · entry 4

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 6,426,617

Underlying: Class A Common Stock · 1,900,000 shares

Expires not disclosed

F1 · derivative.exercise_price: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F5 · kind: On September 25, 2020, the Dagmar Dolby 2019 Trust BB (as defined below), which is a grantor retained annuity trust, transferred 1,900,000 shares of Class B Common Stock to the Dagmar Dolby Trust. Such share transfer was effected in satisfaction of the annuity payment requirements, and in accordance with the terms, of the Dagmar Dolby 2019 Trust BBs trust instrument, and was a transfer for no value without the payment or receipt of any funds or other consideration by any reporting person in exchange therefor. Applicable rules consider such a share transfer to be exempt from the reporting requirements of Section 16(a) and the provisions of Section 16(b) of the Exchange Act, and as a result the reporting persons are voluntarily reporting such share transfer on this Form 4.

F1 · derivative.exercise_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F1 · derivative.expiration_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F4 · ownership.nature: Reflects shares of Class B Common Stock (as converted or convertible, as applicable, into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power over which is shared by the Trustee and David E. Dolby as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting persons disclaim beneficial ownership of these securities except to the extent of their respective pecuniary interest therein.

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September 25, 2020 Filed Sep 26, 2020 01:45 UTC Dolby Laboratories, Inc. DLB · Entity 2518 GiftClass B Common Stock · Derivative 1,900,000 $0.00 $0.00
Disclosure

SEC source: 0001209191-20-052161 · doc4.xml · derivative · entry 3

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 1,800,000

Underlying: Class A Common Stock · 1,900,000 shares

Expires not disclosed

F1 · derivative.exercise_price: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F5 · kind: On September 25, 2020, the Dagmar Dolby 2019 Trust BB (as defined below), which is a grantor retained annuity trust, transferred 1,900,000 shares of Class B Common Stock to the Dagmar Dolby Trust. Such share transfer was effected in satisfaction of the annuity payment requirements, and in accordance with the terms, of the Dagmar Dolby 2019 Trust BBs trust instrument, and was a transfer for no value without the payment or receipt of any funds or other consideration by any reporting person in exchange therefor. Applicable rules consider such a share transfer to be exempt from the reporting requirements of Section 16(a) and the provisions of Section 16(b) of the Exchange Act, and as a result the reporting persons are voluntarily reporting such share transfer on this Form 4.

F1 · derivative.exercise_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F1 · derivative.expiration_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F6 · ownership.nature: Reflects shares of Class B Common Stock (convertible into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby 2019 Trust BB, dated July 22, 2019 (the "Dagmar Dolby 2019 Trust BB"), voting power over which is held by David E. Dolby as Special Trustee of the Dagmar Dolby 2019 Trust BB. This report is filed by Dagmar Dolby with respect to the securities held by the Dagmar Dolby 2019 Trust BB. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

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September 25, 2020 Filed Sep 26, 2020 01:45 UTC Dolby Laboratories, Inc. DLB · Entity 2518 GiftClass B Common Stock · Derivative 1,825,000 $0.00 $0.00
Disclosure

SEC source: 0001209191-20-052161 · doc4.xml · derivative · entry 2

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 4,526,617

Underlying: Class A Common Stock · 1,825,000 shares

Expires not disclosed

F1 · derivative.exercise_price: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F2 · kind: On September 25, 2020, the Dagmar Dolby 2018 Trust BB (as defined below), which is a grantor retained annuity trust, transferred 1,825,000 shares of Class B Common Stock to the Dagmar Dolby Trust (as defined below). Such share transfer was effected in satisfaction of the annuity payment requirements, and in accordance with the terms, of the Dagmar Dolby 2018 Trust BBs trust instrument, and was a transfer for no value without the payment or receipt of any funds or other consideration by any reporting person in exchange therefor. Applicable rules consider such a share transfer to be exempt from the reporting requirements of Section 16(a) and the provisions of Section 16(b) of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), and as a result the reporting persons are voluntarily reporting such share transfer on this Form 4.

F1 · derivative.exercise_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F1 · derivative.expiration_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F4 · ownership.nature: Reflects shares of Class B Common Stock (as converted or convertible, as applicable, into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power over which is shared by the Trustee and David E. Dolby as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting persons disclaim beneficial ownership of these securities except to the extent of their respective pecuniary interest therein.

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September 25, 2020 Filed Sep 26, 2020 01:45 UTC Dolby Laboratories, Inc. DLB · Entity 2518 GiftClass B Common Stock · Derivative 1,825,000 $0.00 $0.00
Disclosure

SEC source: 0001209191-20-052161 · doc4.xml · derivative · entry 1

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 0

Underlying: Class A Common Stock · 1,825,000 shares

Expires not disclosed

F1 · derivative.exercise_price: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F2 · kind: On September 25, 2020, the Dagmar Dolby 2018 Trust BB (as defined below), which is a grantor retained annuity trust, transferred 1,825,000 shares of Class B Common Stock to the Dagmar Dolby Trust (as defined below). Such share transfer was effected in satisfaction of the annuity payment requirements, and in accordance with the terms, of the Dagmar Dolby 2018 Trust BBs trust instrument, and was a transfer for no value without the payment or receipt of any funds or other consideration by any reporting person in exchange therefor. Applicable rules consider such a share transfer to be exempt from the reporting requirements of Section 16(a) and the provisions of Section 16(b) of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), and as a result the reporting persons are voluntarily reporting such share transfer on this Form 4.

F1 · derivative.exercise_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F1 · derivative.expiration_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F3 · ownership.nature: Reflects shares of Class B Common Stock (convertible into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby 2018 Trust BB, dated June 20, 2018 (the "Dagmar Dolby 2018 Trust BB"), voting power over which is held by David E. Dolby, son of Dagmar Dolby, as Special Trustee of the Dagmar Dolby 2018 Trust BB. This report is filed by Dagmar Dolby with respect to the securities held and transactions effected by the Dagmar Dolby 2018 Trust BB. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

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September 02, 2020 Filed Sep 2, 2020 23:04 UTC Dolby Laboratories, Inc. DLB · Entity 2518 ConversionClass B Common Stock · Derivative 29,000 $0.00 $0.00
Disclosure

SEC source: 0001209191-20-049259 · doc4.xml · derivative · entry 3

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 2,701,617

Underlying: Class A Common Stock · 29,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F2 · kind: On September 2, 2020, the Dagmar Dolby Trust (as defined below) converted 29,000 shares of Class B Common Stock into a like number of shares of Class A Common Stock and gifted all such shares of Class A Common Stock to one unaffiliated non-profit organization.

F4 · derivative.exercise_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F4 · derivative.expiration_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F3 · ownership.nature: Reflects shares of Class B Common Stock (as converted or convertible, as applicable, into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power over which is shared by the Trustee and David E. Dolby, son of Dagmar Dolby, as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting persons disclaim beneficial ownership of these securities except to the extent of their respective pecuniary interest therein.

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September 02, 2020 Filed Sep 2, 2020 23:04 UTC Dolby Laboratories, Inc. DLB · Entity 2518 GiftClass A Common Stock 29,000 $0.00 $0.00
Disclosure

SEC source: 0001209191-20-049259 · doc4.xml · nonDerivative · entry 2

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 0

F2 · kind: On September 2, 2020, the Dagmar Dolby Trust (as defined below) converted 29,000 shares of Class B Common Stock into a like number of shares of Class A Common Stock and gifted all such shares of Class A Common Stock to one unaffiliated non-profit organization.

F3 · ownership.nature: Reflects shares of Class B Common Stock (as converted or convertible, as applicable, into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power over which is shared by the Trustee and David E. Dolby, son of Dagmar Dolby, as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting persons disclaim beneficial ownership of these securities except to the extent of their respective pecuniary interest therein.

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September 02, 2020 Filed Sep 2, 2020 23:04 UTC Dolby Laboratories, Inc. DLB · Entity 2518 ConversionClass A Common Stock 29,000 $0.00 $0.00
Disclosure

SEC source: 0001209191-20-049259 · doc4.xml · nonDerivative · entry 1

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 29,000

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · security: Each share of Class A Common Stock issued upon conversion of one share of Class B Common Stock at the election of, and at no cost to, the holder.

F2 · kind: On September 2, 2020, the Dagmar Dolby Trust (as defined below) converted 29,000 shares of Class B Common Stock into a like number of shares of Class A Common Stock and gifted all such shares of Class A Common Stock to one unaffiliated non-profit organization.

F3 · ownership.nature: Reflects shares of Class B Common Stock (as converted or convertible, as applicable, into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power over which is shared by the Trustee and David E. Dolby, son of Dagmar Dolby, as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting persons disclaim beneficial ownership of these securities except to the extent of their respective pecuniary interest therein.

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August 25, 2020 Filed Aug 26, 2020 21:03 UTC Dolby Laboratories, Inc. DLB · Entity 2518 ConversionClass B Common Stock · Derivative 65,000 $0.00 $0.00
Disclosure

SEC source: 0001209191-20-048410 · doc4.xml · derivative · entry 3

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 2,730,617

Underlying: Class A Common Stock · 65,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F2 · kind: On August 25, 2020, the Dagmar Dolby Trust (as defined below) converted 65,000 shares of Class B Common Stock into a like number of shares of Class A Common Stock and gifted all such shares of Class A Common Stock to two unaffiliated charitable organizations.

F4 · derivative.exercise_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F4 · derivative.expiration_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F3 · ownership.nature: Reflects shares of Class B Common Stock (as converted or convertible, as applicable, into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power over which is shared by the Trustee and David E. Dolby, son of Dagmar Dolby, as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting persons disclaim beneficial ownership of these securities except to the extent of their respective pecuniary interest therein.

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August 25, 2020 Filed Aug 26, 2020 21:03 UTC Dolby Laboratories, Inc. DLB · Entity 2518 GiftClass A Common Stock 65,000 $0.00 $0.00
Disclosure

SEC source: 0001209191-20-048410 · doc4.xml · nonDerivative · entry 2

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 0

F2 · kind: On August 25, 2020, the Dagmar Dolby Trust (as defined below) converted 65,000 shares of Class B Common Stock into a like number of shares of Class A Common Stock and gifted all such shares of Class A Common Stock to two unaffiliated charitable organizations.

F3 · ownership.nature: Reflects shares of Class B Common Stock (as converted or convertible, as applicable, into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power over which is shared by the Trustee and David E. Dolby, son of Dagmar Dolby, as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting persons disclaim beneficial ownership of these securities except to the extent of their respective pecuniary interest therein.

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August 25, 2020 Filed Aug 26, 2020 21:03 UTC Dolby Laboratories, Inc. DLB · Entity 2518 ConversionClass A Common Stock 65,000 $0.00 $0.00
Disclosure

SEC source: 0001209191-20-048410 · doc4.xml · nonDerivative · entry 1

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 65,000

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · security: Each share of Class A Common Stock issued upon conversion of one share of Class B Common Stock at the election of, and at no cost to, the holder.

F2 · kind: On August 25, 2020, the Dagmar Dolby Trust (as defined below) converted 65,000 shares of Class B Common Stock into a like number of shares of Class A Common Stock and gifted all such shares of Class A Common Stock to two unaffiliated charitable organizations.

F3 · ownership.nature: Reflects shares of Class B Common Stock (as converted or convertible, as applicable, into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power over which is shared by the Trustee and David E. Dolby, son of Dagmar Dolby, as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting persons disclaim beneficial ownership of these securities except to the extent of their respective pecuniary interest therein.

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March 17, 2020 Filed Mar 19, 2020 20:06 UTC Dolby Laboratories, Inc. DLB · Entity 2518 GiftClass B Common Stock · Derivative 1,300,000 $0.00 $0.00
Disclosure

SEC source: 0001209191-20-020247 · doc4.xml · derivative · entry 2

Dolby Dagmar · CIK 0001537372 · 10% owner

DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999 · CIK 0001598813 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 1,300,000

Underlying: Class A Common Stock · 1,300,000 shares

Expires not disclosed

F1 · derivative.exercise_price: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F2 · kind: On March 17, 2020, the Dagmar Dolby Trust contributed 1,300,000 shares of Class B Common Stock to a newly formed grantor retained annuity trust, the Dagmar Dolby 2020 Trust BB (as defined below). Such share contribution was effected solely for tax and estate planning purposes, and was a transfer for no value without the payment or receipt of any funds or other consideration by any reporting person in exchange therefor. Applicable rules consider such a share contribution to be exempt from the reporting requirements of Section 16(a) and the provisions of Section 16(b) of the Exchange Act, and as a result the reporting persons are voluntarily reporting such share contribution on this Form 4.

F1 · derivative.exercise_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F1 · derivative.expiration_date: Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.

F4 · ownership.nature: Reflects shares of Class B Common Stock (convertible into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby 2020 Trust BB, dated March 17, 2020 (the "Dagmar Dolby 2020 Trust BB"), voting power over which is held by David E. Dolby as Special Trustee of the Dagmar Dolby 2020 Trust BB. This report is filed by Dagmar Dolby with respect to the securities held and transactions effected by the Dagmar Dolby 2020 Trust BB. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.

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Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.