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person · Reporting owner

Gallagher Kathleen P.

Disclosed activity across 2 companies

Tapewire entity
51578
SEC CIK
0002048409

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
Atrium Therapeutics, Inc.RNA · Entity 6185Director · See RemarksSeptember 18, 2026September 22, 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.

Atrium Therapeutics, Inc.

Report date September 18, 2026 · Filed September 22, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect119,729 Reported balance After 2026-09-18 transaction · row 1
1 source row

Row 1 · 2026-09-18 · Tax withholding · Disposed 11,632 · Balance 119,729

F1: Represents shares withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting of restricted stock units.

Filing footnotes · ownership attribution and instrument terms

F1: Represents shares withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting of restricted stock units.

Past disclosures · reporting ended (1)

No longer tracked through insider filings. These historical balances do not imply present ownership or a zero position.

Avidity Biosciences, Inc.

Report date February 27, 2026 · Filed February 27, 2026

Section 16 reporting ended · disclosed 2026-02-27. Current position is not established by this disclosure.

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect0 Reported balance After 2026-02-27 transaction · row 1
1 source row

Row 1 · 2026-02-27 · Disposition to issuer · Disposed 80,303 · Balance 0

F1: The reported securities represent shares of Common Stock (inclusive of shares of Common Stock issuable upon settlement of previously reported restricted stock units) disposed of pursuant to the terms of the Agreement and Plan of Merger, dated as of October 25, 2025 (the "Merger Agreement"), among Novartis AG ("Novartis"), Ajax Acquisition Sub, Inc., an indirect wholly owned subsidiary of Novartis, and the Issuer.

Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $25.12 · Expires 2031-04-25Direct0 Reported balance After 2026-02-27 transaction · row 2 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 2 · 2026-02-27 · Disposition to issuer · Disposed 22,321 · Balance 0

F2: The reported Options were disposed of, pursuant to the Merger Agreement, in exchange for a cash payment equal to the excess of the merger consideration of $72.00 over the exercise price.

Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $14.70 · Expires 2032-01-19Direct0 Reported balance After 2026-02-27 transaction · row 3 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 3 · 2026-02-27 · Disposition to issuer · Disposed 13,829 · Balance 0

F2: The reported Options were disposed of, pursuant to the Merger Agreement, in exchange for a cash payment equal to the excess of the merger consideration of $72.00 over the exercise price.

Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $16.65 · Expires 2032-07-17Direct0 Reported balance After 2026-02-27 transaction · row 4 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 4 · 2026-02-27 · Disposition to issuer · Disposed 9,244 · Balance 0

F2: The reported Options were disposed of, pursuant to the Merger Agreement, in exchange for a cash payment equal to the excess of the merger consideration of $72.00 over the exercise price.

Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $16.65 · Expires 2032-07-17Direct0 Reported balance After 2026-02-27 transaction · row 5 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 5 · 2026-02-27 · Disposition to issuer · Disposed 13,352 · Balance 0

F2: The reported Options were disposed of, pursuant to the Merger Agreement, in exchange for a cash payment equal to the excess of the merger consideration of $72.00 over the exercise price.

Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $22.47 · Expires 2033-01-19Direct0 Reported balance After 2026-02-27 transaction · row 6 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 6 · 2026-02-27 · Disposition to issuer · Disposed 27,584 · Balance 0

F2: The reported Options were disposed of, pursuant to the Merger Agreement, in exchange for a cash payment equal to the excess of the merger consideration of $72.00 over the exercise price.

Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $8.24 · Expires 2033-08-19Direct0 Reported balance After 2026-02-27 transaction · row 7 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 7 · 2026-02-27 · Disposition to issuer · Disposed 42,480 · Balance 0

F2: The reported Options were disposed of, pursuant to the Merger Agreement, in exchange for a cash payment equal to the excess of the merger consideration of $72.00 over the exercise price.

Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $10.16 · Expires 2034-01-19Direct0 Reported balance After 2026-02-27 transaction · row 8 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 8 · 2026-02-27 · Disposition to issuer · Disposed 13,520 · Balance 0

F2: The reported Options were disposed of, pursuant to the Merger Agreement, in exchange for a cash payment equal to the excess of the merger consideration of $72.00 over the exercise price.

Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $44.00 · Expires 2034-08-29Direct0 Reported balance After 2026-02-27 transaction · row 9 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 9 · 2026-02-27 · Disposition to issuer · Disposed 16,000 · Balance 0

F2: The reported Options were disposed of, pursuant to the Merger Agreement, in exchange for a cash payment equal to the excess of the merger consideration of $72.00 over the exercise price.

Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $31.42 · Expires 2035-01-05Direct0 Reported balance After 2026-02-27 transaction · row 10 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 10 · 2026-02-27 · Disposition to issuer · Disposed 50,000 · Balance 0

F2: The reported Options were disposed of, pursuant to the Merger Agreement, in exchange for a cash payment equal to the excess of the merger consideration of $72.00 over the exercise price.

Filing footnotes · ownership attribution and instrument terms

F1: The reported securities represent shares of Common Stock (inclusive of shares of Common Stock issuable upon settlement of previously reported restricted stock units) disposed of pursuant to the terms of the Agreement and Plan of Merger, dated as of October 25, 2025 (the "Merger Agreement"), among Novartis AG ("Novartis"), Ajax Acquisition Sub, Inc., an indirect wholly owned subsidiary of Novartis, and the Issuer.

F2: The reported Options were disposed of, pursuant to the Merger Agreement, in exchange for a cash payment equal to the excess of the merger consideration of $72.00 over the exercise price.

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
September 18, 2026 Filed Sep 22, 2026 20:17 UTC Atrium Therapeutics, Inc. RNA · Entity 6185 Tax withholdingCommon Stock 11,632 $8.95 $104,106.40
Disclosure

SEC source: 0001193125-26-397944 · ownership.xml · nonDerivative · entry 1

Gallagher Kathleen P. · CIK 0002048409 · Director · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 119,729

F1 · kind: Represents shares withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting of restricted stock units.

Read SEC document
April 20, 2026 Filed Apr 22, 2026 17:43 UTC Atrium Therapeutics, Inc. RNA · Entity 6185 GrantStock Option (Right to Buy) · Derivative 205,000 $0.00 Strike: $14.30 $0.00
Disclosure

SEC source: 0001193125-26-170914 · ownership.xml · derivative · entry 2

Gallagher Kathleen P. · CIK 0002048409 · Director · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 205,000

Underlying: Common Stock · 205,000 shares

Expires 2036-04-20

F2 · derivative.exercise_date: Twenty-five percent (25%) of the shares underlying this option shall vest and become exercisable on March 20, 2027, with the remaining shares vesting in thirty-six (36) substantially equal monthly installments each month thereafter, subject to the Reporting Person's continuous service to the Issuer on each such vesting date.

Read SEC document
April 20, 2026 Filed Apr 22, 2026 17:43 UTC Atrium Therapeutics, Inc. RNA · Entity 6185 GrantCommon Stock 102,500 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-170914 · ownership.xml · nonDerivative · entry 1

Gallagher Kathleen P. · CIK 0002048409 · Director · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 131,361

F1 · shares: Represents an award of restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's common stock. Twenty-five percent (25%) of the RSUs shall vest on March 20, 2027, with the remaining RSUs vesting in three (3) substantially equal yearly installments each year thereafter, subject to the Reporting Person's continuous service to the Issuer on each such vesting date.

Read SEC document
February 27, 2026 Filed Feb 27, 2026 20:13 UTC Avidity Biosciences, Inc. RNAM · Entity 11854 Disposition to issuerStock Option (Right to Buy) · Derivative 50,000 Not disclosed Strike: $31.42 Not disclosed
Disclosure

SEC source: 0001193125-26-082228 · ownership.xml · derivative · entry 10

Gallagher Kathleen P. · CIK 0002048409 · Chief Program Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 50,000 shares

Expires 2035-01-05

F2 · price: The reported Options were disposed of, pursuant to the Merger Agreement, in exchange for a cash payment equal to the excess of the merger consideration of $72.00 over the exercise price.

F2 · derivative.exercise_date: The reported Options were disposed of, pursuant to the Merger Agreement, in exchange for a cash payment equal to the excess of the merger consideration of $72.00 over the exercise price.

Read SEC document
February 27, 2026 Filed Feb 27, 2026 20:13 UTC Avidity Biosciences, Inc. RNAM · Entity 11854 Disposition to issuerStock Option (Right to Buy) · Derivative 16,000 Not disclosed Strike: $44.00 Not disclosed
Disclosure

SEC source: 0001193125-26-082228 · ownership.xml · derivative · entry 9

Gallagher Kathleen P. · CIK 0002048409 · Chief Program Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 16,000 shares

Expires 2034-08-29

F2 · price: The reported Options were disposed of, pursuant to the Merger Agreement, in exchange for a cash payment equal to the excess of the merger consideration of $72.00 over the exercise price.

F2 · derivative.exercise_date: The reported Options were disposed of, pursuant to the Merger Agreement, in exchange for a cash payment equal to the excess of the merger consideration of $72.00 over the exercise price.

Read SEC document
February 27, 2026 Filed Feb 27, 2026 20:13 UTC Avidity Biosciences, Inc. RNAM · Entity 11854 Disposition to issuerStock Option (Right to Buy) · Derivative 13,520 Not disclosed Strike: $10.16 Not disclosed
Disclosure

SEC source: 0001193125-26-082228 · ownership.xml · derivative · entry 8

Gallagher Kathleen P. · CIK 0002048409 · Chief Program Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 13,520 shares

Expires 2034-01-19

F2 · price: The reported Options were disposed of, pursuant to the Merger Agreement, in exchange for a cash payment equal to the excess of the merger consideration of $72.00 over the exercise price.

F2 · derivative.exercise_date: The reported Options were disposed of, pursuant to the Merger Agreement, in exchange for a cash payment equal to the excess of the merger consideration of $72.00 over the exercise price.

Read SEC document
February 27, 2026 Filed Feb 27, 2026 20:13 UTC Avidity Biosciences, Inc. RNAM · Entity 11854 Disposition to issuerStock Option (Right to Buy) · Derivative 42,480 Not disclosed Strike: $8.24 Not disclosed
Disclosure

SEC source: 0001193125-26-082228 · ownership.xml · derivative · entry 7

Gallagher Kathleen P. · CIK 0002048409 · Chief Program Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 42,480 shares

Expires 2033-08-19

F2 · price: The reported Options were disposed of, pursuant to the Merger Agreement, in exchange for a cash payment equal to the excess of the merger consideration of $72.00 over the exercise price.

F2 · derivative.exercise_date: The reported Options were disposed of, pursuant to the Merger Agreement, in exchange for a cash payment equal to the excess of the merger consideration of $72.00 over the exercise price.

Read SEC document
February 27, 2026 Filed Feb 27, 2026 20:13 UTC Avidity Biosciences, Inc. RNAM · Entity 11854 Disposition to issuerStock Option (Right to Buy) · Derivative 27,584 Not disclosed Strike: $22.47 Not disclosed
Disclosure

SEC source: 0001193125-26-082228 · ownership.xml · derivative · entry 6

Gallagher Kathleen P. · CIK 0002048409 · Chief Program Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 27,584 shares

Expires 2033-01-19

F2 · price: The reported Options were disposed of, pursuant to the Merger Agreement, in exchange for a cash payment equal to the excess of the merger consideration of $72.00 over the exercise price.

F2 · derivative.exercise_date: The reported Options were disposed of, pursuant to the Merger Agreement, in exchange for a cash payment equal to the excess of the merger consideration of $72.00 over the exercise price.

Read SEC document
February 27, 2026 Filed Feb 27, 2026 20:13 UTC Avidity Biosciences, Inc. RNAM · Entity 11854 Disposition to issuerStock Option (Right to Buy) · Derivative 13,352 Not disclosed Strike: $16.65 Not disclosed
Disclosure

SEC source: 0001193125-26-082228 · ownership.xml · derivative · entry 5

Gallagher Kathleen P. · CIK 0002048409 · Chief Program Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 13,352 shares

Expires 2032-07-17

F2 · price: The reported Options were disposed of, pursuant to the Merger Agreement, in exchange for a cash payment equal to the excess of the merger consideration of $72.00 over the exercise price.

F2 · derivative.exercise_date: The reported Options were disposed of, pursuant to the Merger Agreement, in exchange for a cash payment equal to the excess of the merger consideration of $72.00 over the exercise price.

Read SEC document
February 27, 2026 Filed Feb 27, 2026 20:13 UTC Avidity Biosciences, Inc. RNAM · Entity 11854 Disposition to issuerStock Option (Right to Buy) · Derivative 9,244 Not disclosed Strike: $16.65 Not disclosed
Disclosure

SEC source: 0001193125-26-082228 · ownership.xml · derivative · entry 4

Gallagher Kathleen P. · CIK 0002048409 · Chief Program Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 9,244 shares

Expires 2032-07-17

F2 · price: The reported Options were disposed of, pursuant to the Merger Agreement, in exchange for a cash payment equal to the excess of the merger consideration of $72.00 over the exercise price.

F2 · derivative.exercise_date: The reported Options were disposed of, pursuant to the Merger Agreement, in exchange for a cash payment equal to the excess of the merger consideration of $72.00 over the exercise price.

Read SEC document
February 27, 2026 Filed Feb 27, 2026 20:13 UTC Avidity Biosciences, Inc. RNAM · Entity 11854 Disposition to issuerStock Option (Right to Buy) · Derivative 13,829 Not disclosed Strike: $14.70 Not disclosed
Disclosure

SEC source: 0001193125-26-082228 · ownership.xml · derivative · entry 3

Gallagher Kathleen P. · CIK 0002048409 · Chief Program Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 13,829 shares

Expires 2032-01-19

F2 · price: The reported Options were disposed of, pursuant to the Merger Agreement, in exchange for a cash payment equal to the excess of the merger consideration of $72.00 over the exercise price.

F2 · derivative.exercise_date: The reported Options were disposed of, pursuant to the Merger Agreement, in exchange for a cash payment equal to the excess of the merger consideration of $72.00 over the exercise price.

Read SEC document
February 27, 2026 Filed Feb 27, 2026 20:13 UTC Avidity Biosciences, Inc. RNAM · Entity 11854 Disposition to issuerStock Option (Right to Buy) · Derivative 22,321 Not disclosed Strike: $25.12 Not disclosed
Disclosure

SEC source: 0001193125-26-082228 · ownership.xml · derivative · entry 2

Gallagher Kathleen P. · CIK 0002048409 · Chief Program Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 22,321 shares

Expires 2031-04-25

F2 · price: The reported Options were disposed of, pursuant to the Merger Agreement, in exchange for a cash payment equal to the excess of the merger consideration of $72.00 over the exercise price.

F2 · derivative.exercise_date: The reported Options were disposed of, pursuant to the Merger Agreement, in exchange for a cash payment equal to the excess of the merger consideration of $72.00 over the exercise price.

Read SEC document
February 27, 2026 Filed Feb 27, 2026 20:13 UTC Avidity Biosciences, Inc. RNAM · Entity 11854 Disposition to issuerCommon Stock 80,303 Not disclosed Not disclosed
Disclosure

SEC source: 0001193125-26-082228 · ownership.xml · nonDerivative · entry 1

Gallagher Kathleen P. · CIK 0002048409 · Chief Program Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

F1 · shares: The reported securities represent shares of Common Stock (inclusive of shares of Common Stock issuable upon settlement of previously reported restricted stock units) disposed of pursuant to the terms of the Agreement and Plan of Merger, dated as of October 25, 2025 (the "Merger Agreement"), among Novartis AG ("Novartis"), Ajax Acquisition Sub, Inc., an indirect wholly owned subsidiary of Novartis, and the Issuer.

F1 · price: The reported securities represent shares of Common Stock (inclusive of shares of Common Stock issuable upon settlement of previously reported restricted stock units) disposed of pursuant to the terms of the Agreement and Plan of Merger, dated as of October 25, 2025 (the "Merger Agreement"), among Novartis AG ("Novartis"), Ajax Acquisition Sub, Inc., an indirect wholly owned subsidiary of Novartis, and the Issuer.

Read SEC document
December 17, 2025 Filed Dec 19, 2025 13:24 UTC Avidity Biosciences, Inc. RNA · Entity 11854 Tax withholdingCommon Stock 8,030 $71.87 $577,116.10
Disclosure

SEC source: 0001599901-25-000215 · wk-form4_1766150639.xml · nonDerivative · entry 3

Gallagher Kathleen P. · CIK 0002048409 · Chief Program Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 80,838

F3 · shares: Represents the number of shares withheld by the Issuer to cover tax withholding in connection with the settlement of restricted stock units on December 17, 2025.

Read SEC document
December 17, 2025 Filed Dec 19, 2025 13:24 UTC Avidity Biosciences, Inc. RNA · Entity 11854 Tax withholdingCommon Stock 33,336 $71.87 $2,395,858.32
Disclosure

SEC source: 0001599901-25-000215 · wk-form4_1766150639.xml · nonDerivative · entry 2

Gallagher Kathleen P. · CIK 0002048409 · Chief Program Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 88,868

F2 · shares: Represents the number of shares withheld by the Issuer to cover tax withholding in connection with the settlement of PSUs on December 17, 2025.

Read SEC document
December 17, 2025 Filed Dec 19, 2025 13:24 UTC Avidity Biosciences, Inc. RNA · Entity 11854 GrantCommon Stock 72,000 $0.00 $0.00
Disclosure

SEC source: 0001599901-25-000215 · wk-form4_1766150639.xml · nonDerivative · entry 1

Gallagher Kathleen P. · CIK 0002048409 · Chief Program Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 122,204

F1 · shares: Represents shares acquired upon the vesting of performance-based restricted stock units (PSUs). Each PSU represented a contingent right to receive one share of the Issuer's common stock. The PSUs were originally granted to the Reporting Person on October 30, 2024. The PSUs were accelerated and settled on December 17, 2025 for tax planning purposes and such shares remain subject to recoupment by the Issuer if the Reporting Person's employment is terminated by the Issuer for cause or by the Reporting Person without good reason.

Read SEC document
September 02, 2025 Filed Sep 3, 2025 00:30 UTC Avidity Biosciences, Inc. RNA · Entity 11854 SaleCommon Stock 188 $47.42 $8,914.96
Disclosure

SEC source: 0001599901-25-000171 · wk-form4_1756859427.xml · nonDerivative · entry 1

Gallagher Kathleen P. · CIK 0002048409 · Chief Program Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 50,204

F1 · kind: Represents the number of shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of RSUs on August 30, 2025 and the sale of the resulting shares of common stock on September 2, 2025. This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of tax withholding obligations to be funded by a "sell-to-cover" transaction and does not represent a discretionary trade by the Reporting Person. The Reporting Person has executed an instruction letter for the automatic sale of such "sell-to-cover" shares, intended to satisfy the affirmative defense conditions of Rule 10b5-1.

Read SEC document
June 17, 2025 Filed Jun 18, 2025 22:02 UTC Avidity Biosciences, Inc. RNA · Entity 11854 SaleCommon Stock 911 $30.24 $27,548.64
Disclosure

SEC source: 0001599901-25-000131 · wk-form4_1750284162.xml · nonDerivative · entry 1

Gallagher Kathleen P. · CIK 0002048409 · Chief Program Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 50,392

F1 · kind: This sale was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person on June 12, 2024.

Read SEC document
June 02, 2025 Filed Jun 4, 2025 20:48 UTC Avidity Biosciences, Inc. RNA · Entity 11854 Exercise / conversionStock Option (Right to Buy) · Derivative 5,875 $0.00 Strike: $16.65 $0.00
Disclosure

SEC source: 0001599901-25-000109 · wk-form4_1749070104.xml · derivative · entry 3

Gallagher Kathleen P. · CIK 0002048409 · Chief Program Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 22,596

Underlying: Common Stock · 5,875 shares

Expires 2032-07-17

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 · kind: This option exercise and sale was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person on June 12, 2024.

F3 · derivative.exercise_date: This option was granted on July 18, 2022 and vests in equal installments of 1/48 of the original number of shares subject to the option on each monthly anniversary of such grant date, until it is fully vested and exercisable on July 18, 2026.

Read SEC document
June 02, 2025 Filed Jun 4, 2025 20:48 UTC Avidity Biosciences, Inc. RNA · Entity 11854 SaleCommon Stock 5,875 $32.48 $190,832.93
Disclosure

SEC source: 0001599901-25-000109 · wk-form4_1749070104.xml · nonDerivative · entry 2

Gallagher Kathleen P. · CIK 0002048409 · Chief Program Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 50,554

F1 · kind: This option exercise and sale was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person on June 12, 2024.

F2 · price: This represents a weighted-average price. These shares were sold in multiple transactions at prices ranging from $31.10 to $33.22. The Reporting Person undertakes to provide the Issuer, any securityholder of the Issuer, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Read SEC document
June 02, 2025 Filed Jun 4, 2025 20:48 UTC Avidity Biosciences, Inc. RNA · Entity 11854 Exercise / conversionCommon Stock 5,875 $16.65 $97,818.75
Disclosure

SEC source: 0001599901-25-000109 · wk-form4_1749070104.xml · nonDerivative · entry 1

Gallagher Kathleen P. · CIK 0002048409 · Chief Program Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 56,429

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 · kind: This option exercise and sale was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person on June 12, 2024.

Read SEC document
May 01, 2025 Filed May 2, 2025 23:55 UTC Avidity Biosciences, Inc. RNA · Entity 11854 Exercise / conversionStock Option (Right to Buy) · Derivative 5,875 $0.00 Strike: $16.65 $0.00
Disclosure

SEC source: 0001599901-25-000097 · wk-form4_1746230127.xml · derivative · entry 3

Gallagher Kathleen P. · CIK 0002048409 · Chief Program Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 28,471

Underlying: Common Stock · 5,875 shares

Expires 2032-07-17

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 · kind: This option exercise and sale was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person on June 12, 2024.

F3 · derivative.exercise_date: This option was granted on July 18, 2022 and vests in equal installments of 1/48 of the original number of shares subject to the option on each monthly anniversary of such grant date, until it is fully vested and exercisable on July 18, 2026.

Read SEC document
May 01, 2025 Filed May 2, 2025 23:55 UTC Avidity Biosciences, Inc. RNA · Entity 11854 SaleCommon Stock 5,875 $32.40 $190,324.15
Disclosure

SEC source: 0001599901-25-000097 · wk-form4_1746230127.xml · nonDerivative · entry 2

Gallagher Kathleen P. · CIK 0002048409 · Chief Program Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 50,554

F1 · kind: This option exercise and sale was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person on June 12, 2024.

F2 · price: This represents a weighted-average price. These shares were sold in multiple transactions at prices ranging from $31.46 to $32.99. The Reporting Person undertakes to provide the Issuer, any securityholder of the Issuer, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Read SEC document
May 01, 2025 Filed May 2, 2025 23:55 UTC Avidity Biosciences, Inc. RNA · Entity 11854 Exercise / conversionCommon Stock 5,875 $16.65 $97,818.75
Disclosure

SEC source: 0001599901-25-000097 · wk-form4_1746230127.xml · nonDerivative · entry 1

Gallagher Kathleen P. · CIK 0002048409 · Chief Program Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 56,429

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 · kind: This option exercise and sale was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person on June 12, 2024.

Read SEC document
April 01, 2025 Filed Apr 3, 2025 20:56 UTC Avidity Biosciences, Inc. RNA · Entity 11854 Exercise / conversionStock Option (Right to Buy) · Derivative 329 $0.00 Strike: $16.65 $0.00
Disclosure

SEC source: 0001599901-25-000079 · wk-form4_1743713765.xml · derivative · entry 6

Gallagher Kathleen P. · CIK 0002048409 · Chief Program Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 34,346

Underlying: Common Stock · 329 shares

Expires 2032-07-17

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 · kind: This option exercise and sale was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person on June 12, 2024.

F4 · derivative.exercise_date: This option was granted on July 18, 2022 and vests in equal installments of 1/48 of the original number of shares subject to the option on each monthly anniversary of such grant date, until it is fully vested and exercisable on July 18, 2026.

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April 01, 2025 Filed Apr 3, 2025 20:56 UTC Avidity Biosciences, Inc. RNA · Entity 11854 Exercise / conversionStock Option (Right to Buy) · Derivative 5,546 $0.00 Strike: $14.70 $0.00
Disclosure

SEC source: 0001599901-25-000079 · wk-form4_1743713765.xml · derivative · entry 5

Gallagher Kathleen P. · CIK 0002048409 · Chief Program Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 13,829

Underlying: Common Stock · 5,546 shares

Expires 2032-01-19

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 · kind: This option exercise and sale was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person on June 12, 2024.

F3 · derivative.exercise_date: This option was granted on January 20, 2022 and vests in equal installments of 1/48 of the original number of shares subject to the option on each monthly anniversary of such grant date, until it is fully vested and exercisable on January 20, 2026.

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April 01, 2025 Filed Apr 3, 2025 20:56 UTC Avidity Biosciences, Inc. RNA · Entity 11854 SaleCommon Stock 329 $27.83 $9,155.21
Disclosure

SEC source: 0001599901-25-000079 · wk-form4_1743713765.xml · nonDerivative · entry 4

Gallagher Kathleen P. · CIK 0002048409 · Chief Program Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 50,554

F1 · kind: This option exercise and sale was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person on June 12, 2024.

F2 · price: This represents a weighted-average price. These shares were sold in multiple transactions at prices ranging from $26.67 to $29.16. The Reporting Person undertakes to provide the Issuer, any securityholder of the Issuer, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

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April 01, 2025 Filed Apr 3, 2025 20:56 UTC Avidity Biosciences, Inc. RNA · Entity 11854 Exercise / conversionCommon Stock 329 $16.65 $5,477.85
Disclosure

SEC source: 0001599901-25-000079 · wk-form4_1743713765.xml · nonDerivative · entry 3

Gallagher Kathleen P. · CIK 0002048409 · Chief Program Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 50,883

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 · kind: This option exercise and sale was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person on June 12, 2024.

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April 01, 2025 Filed Apr 3, 2025 20:56 UTC Avidity Biosciences, Inc. RNA · Entity 11854 SaleCommon Stock 5,546 $27.83 $154,330.76
Disclosure

SEC source: 0001599901-25-000079 · wk-form4_1743713765.xml · nonDerivative · entry 2

Gallagher Kathleen P. · CIK 0002048409 · Chief Program Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 50,554

F1 · kind: This option exercise and sale was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person on June 12, 2024.

F2 · price: This represents a weighted-average price. These shares were sold in multiple transactions at prices ranging from $26.67 to $29.16. The Reporting Person undertakes to provide the Issuer, any securityholder of the Issuer, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

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April 01, 2025 Filed Apr 3, 2025 20:56 UTC Avidity Biosciences, Inc. RNA · Entity 11854 Exercise / conversionCommon Stock 5,546 $14.70 $81,526.20
Disclosure

SEC source: 0001599901-25-000079 · wk-form4_1743713765.xml · nonDerivative · entry 1

Gallagher Kathleen P. · CIK 0002048409 · Chief Program Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 56,100

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 · kind: This option exercise and sale was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person on June 12, 2024.

Read SEC document
March 03, 2025 Filed Mar 4, 2025 23:17 UTC Avidity Biosciences, Inc. RNA · Entity 11854 Exercise / conversionStock Option (Right to Buy) · Derivative 5,875 $0.00 Strike: $14.70 $0.00
Disclosure

SEC source: 0001599901-25-000061 · wk-form4_1741130257.xml · derivative · entry 3

Gallagher Kathleen P. · CIK 0002048409 · Chief Program Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 19,375

Underlying: Common Stock · 5,875 shares

Expires 2032-01-19

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.

F3 · derivative.exercise_date: This option was granted on January 20, 2022 and vests in equal installments of 1/48 of the original number of shares subject to the option on each monthly anniversary of such grant date, until it is fully vested and exercisable on January 20, 2026.

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March 03, 2025 Filed Mar 4, 2025 23:17 UTC Avidity Biosciences, Inc. RNA · Entity 11854 SaleCommon Stock 5,875 $29.41 $172,807.25
Disclosure

SEC source: 0001599901-25-000061 · wk-form4_1741130257.xml · nonDerivative · entry 2

Gallagher Kathleen P. · CIK 0002048409 · Chief Program Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 50,554

F1 · kind: This option exercise and sale was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person on June 12, 2024.

F2 · price: This represents a weighted-average price. These shares were sold in multiple transactions at prices ranging from $28.88 to $30.05. The Reporting Person undertakes to provide the Issuer, any securityholder of the Issuer, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

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March 03, 2025 Filed Mar 4, 2025 23:17 UTC Avidity Biosciences, Inc. RNA · Entity 11854 Exercise / conversionCommon Stock 5,875 $14.70 $86,362.50
Disclosure

SEC source: 0001599901-25-000061 · wk-form4_1741130257.xml · nonDerivative · entry 1

Gallagher Kathleen P. · CIK 0002048409 · Chief Program Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 56,429

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 · kind: This option exercise and sale was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person on June 12, 2024.

Read SEC document
February 03, 2025 Filed Feb 5, 2025 22:01 UTC Avidity Biosciences, Inc. RNA · Entity 11854 Exercise / conversionStock Option (Right to Buy) · Derivative 5,875 $0.00 Strike: $16.65 $0.00
Disclosure

SEC source: 0001599901-25-000045 · wk-form4_1738792857.xml · derivative · entry 3

Gallagher Kathleen P. · CIK 0002048409 · Chief Program Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 34,675

Underlying: Common Stock · 5,875 shares

Expires 2032-07-17

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 · kind: This option exercise and sale was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person on June 12, 2024.

F3 · derivative.exercise_date: This option was granted on July 18, 2022 and vests in equal installments of 1/48 of the original number of shares subject to the option on each monthly anniversary of such grant date, until it is fully vested and exercisable on July 18, 2026.

Read SEC document
February 03, 2025 Filed Feb 5, 2025 22:01 UTC Avidity Biosciences, Inc. RNA · Entity 11854 SaleCommon Stock 5,875 $32.16 $188,918.26
Disclosure

SEC source: 0001599901-25-000045 · wk-form4_1738792857.xml · nonDerivative · entry 2

Gallagher Kathleen P. · CIK 0002048409 · Chief Program Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 50,554

F1 · kind: This option exercise and sale was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person on June 12, 2024.

F2 · price: This represents a weighted-average price. These shares were sold in multiple transactions at prices ranging from $31.53 to $32.77. The Reporting Person undertakes to provide the Issuer, any securityholder of the Issuer, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Read SEC document
February 03, 2025 Filed Feb 5, 2025 22:01 UTC Avidity Biosciences, Inc. RNA · Entity 11854 Exercise / conversionCommon Stock 5,875 $16.65 $97,818.75
Disclosure

SEC source: 0001599901-25-000045 · wk-form4_1738792857.xml · nonDerivative · entry 1

Gallagher Kathleen P. · CIK 0002048409 · Chief Program Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 56,429

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 · kind: This option exercise and sale was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person on June 12, 2024.

Read SEC document
January 22, 2025 Filed Jan 24, 2025 01:08 UTC Avidity Biosciences, Inc. RNA · Entity 11854 SaleCommon Stock 5,629 $30.16 $169,775.71
Disclosure

SEC source: 0001599901-25-000033 · wk-form4_1737680894.xml · nonDerivative · entry 4

Gallagher Kathleen P. · CIK 0002048409 · Chief Program Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 50,554

F1 · kind: This sale was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person on June 12, 2024.

F5 · price: This represents a weighted-average price. These shares were sold in multiple transactions at prices ranging from $29.52 to $31.54. The Reporting Person undertakes to provide the Issuer, any securityholder of the Issuer, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Read SEC document
January 21, 2025 Filed Jan 24, 2025 01:08 UTC Avidity Biosciences, Inc. RNA · Entity 11854 SaleCommon Stock 1,817 $28.59 $51,953.48
Disclosure

SEC source: 0001599901-25-000033 · wk-form4_1737680894.xml · nonDerivative · entry 3

Gallagher Kathleen P. · CIK 0002048409 · Chief Program Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 56,183

F2 · shares: Represents the number of shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of RSUs on January 20, 2025 and the sale of the resulting shares of common stock on January 21, 2025. This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of tax withholding obligations to be funded by a "sell-to-cover" transaction and does not represent a discretionary trade by the Reporting Person. The Reporting Person has executed an instruction letter for the automatic sale of such "sell-to-cover" shares, intended to satisfy the affirmative defense conditions of Rule 10b5-1.

F4 · price: This represents a weighted-average price. These shares were sold in multiple transactions at prices ranging from $28.59 to $29.08. The Reporting Person undertakes to provide the Issuer, any securityholder of the Issuer, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Read SEC document
January 21, 2025 Filed Jan 24, 2025 01:08 UTC Avidity Biosciences, Inc. RNA · Entity 11854 SaleCommon Stock 670 $28.60 $19,158.85
Disclosure

SEC source: 0001599901-25-000033 · wk-form4_1737680894.xml · nonDerivative · entry 2

Gallagher Kathleen P. · CIK 0002048409 · Chief Program Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 58,000

F2 · shares: Represents the number of shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of RSUs on January 20, 2025 and the sale of the resulting shares of common stock on January 21, 2025. This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of tax withholding obligations to be funded by a "sell-to-cover" transaction and does not represent a discretionary trade by the Reporting Person. The Reporting Person has executed an instruction letter for the automatic sale of such "sell-to-cover" shares, intended to satisfy the affirmative defense conditions of Rule 10b5-1.

F3 · price: This represents a weighted-average price. These shares were sold in multiple transactions at prices ranging from $28.59 to $29.47. The Reporting Person undertakes to provide the Issuer, any securityholder of the Issuer, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Read SEC document
January 21, 2025 Filed Jan 24, 2025 01:08 UTC Avidity Biosciences, Inc. RNA · Entity 11854 SaleCommon Stock 1,295 $28.59 $37,024.05
Disclosure

SEC source: 0001599901-25-000033 · wk-form4_1737680894.xml · nonDerivative · entry 1

Gallagher Kathleen P. · CIK 0002048409 · Chief Program Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 58,670

F1 · kind: This sale was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person on June 12, 2024.

Read SEC document
January 06, 2025 Filed Jan 9, 2025 01:16 UTC Avidity Biosciences, Inc. RNA · Entity 11854 GrantStock Option (Right to Buy) · Derivative 50,000 $0.00 Strike: $31.42 $0.00
Disclosure

SEC source: 0001599901-25-000017 · wk-form4_1736385384.xml · derivative · entry 2

Gallagher Kathleen P. · CIK 0002048409 · Chief Program Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 50,000

Underlying: Common Stock · 50,000 shares

Expires 2035-01-05

F2 · derivative.exercise_date: This option vests in 48 equal installments on each monthly anniversary of the grant date, until it is fully vested on January 6, 2029.

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January 06, 2025 Filed Jan 9, 2025 01:16 UTC Avidity Biosciences, Inc. RNA · Entity 11854 GrantCommon Stock 25,000 $0.00 $0.00
Disclosure

SEC source: 0001599901-25-000017 · wk-form4_1736385384.xml · nonDerivative · entry 1

Gallagher Kathleen P. · CIK 0002048409 · Chief Program Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 59,965

F1 · shares: Represents restricted stock units (RSUs). Each RSU represents a contingent right to receive one share of the Issuer's common stock. The RSUs shall vest in four equal installments on the first four anniversaries of January 6, 2025, subject to the Reporting Person's continuous service to the Issuer on each such vesting date.

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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.