person · Reporting owner

Zagorski Mark

Disclosed activity across 4 companies

Tapewire entity: 33777
SEC CIK: 0001709574

Reported relationships

Latest disclosed role at each company.

Company	Last reported as	Report date	Published
DoubleVerify Holdings, Inc.DV · Entity 4486	Director · Chief Executive Officer	September 30, 2026	October 03, 2026
MAGNITE, INC.RUBI · Entity 2049	President & COO	April 01, 2020	April 03, 2020
Teads Holding Co.TEAD · Entity 7241	Director	May 13, 2026	May 18, 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.

DoubleVerify Holdings, Inc.

Report date September 30, 2026 · Filed October 03, 2026

Security / award	Ownership account	Disclosed shares / units	Disclosure context
Common StockSEC Table I · non-derivative	Direct	616,728	Ending reported balance After 2026-09-30 transaction · row 2 2 source rows · reconciled sequence Row 1 · 2026-09-30 · Exercise / conversion · Acquired 13,476 · Balance 623,608 F1: Each restricted stock unit was granted on August 19, 2025. 8.33% of the restricted stock units vested and were settled on December 31, 2025 (the "2025 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 8.33% on each quarterly anniversary of the 2025 Vesting Date, subject to Mr. Zagorski's continued employment. Row 2 · 2026-09-30 · Tax withholding · Disposed 6,880 · Balance 616,728 F2: Represents shares withheld to satisfy tax withholding obligations in connection with the vesting of restricted stock units.
Restricted Stock UnitsSEC Table II · derivative / convertible security	Direct	107,804	Reported balance After 2026-09-30 transaction · row 3 Instrument identity requires review; Table II rows are not merged. 1 source row Row 3 · 2026-09-30 · Exercise / conversion · Disposed 13,476 · Balance 107,804 F3: Restricted stock units convert into common stock on a one-for-one basis. F1: Each restricted stock unit was granted on August 19, 2025. 8.33% of the restricted stock units vested and were settled on December 31, 2025 (the "2025 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 8.33% on each quarterly anniversary of the 2025 Vesting Date, subject to Mr. Zagorski's continued employment.

Filing footnotes · ownership attribution and instrument terms

F1: Each restricted stock unit was granted on August 19, 2025. 8.33% of the restricted stock units vested and were settled on December 31, 2025 (the "2025 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 8.33% on each quarterly anniversary of the 2025 Vesting Date, subject to Mr. Zagorski's continued employment.

F2: Represents shares withheld to satisfy tax withholding obligations in connection with the vesting of restricted stock units.

F3: Restricted stock units convert into common stock on a one-for-one basis.

MAGNITE, INC.

Report date April 01, 2020 · Filed April 03, 2020

Security / award	Ownership account	Disclosed shares / units	Disclosure context
Common StockSEC Table I · non-derivative	Direct	348,921	Reported balance After 2020-04-01 transaction · row 1 Account or security details depend on footnotes; rows are not merged. 1 source row Row 1 · 2020-04-01 · Grant · Acquired 348,922 · Balance 348,921 F1: Received on April 1, 2020, the effective date (the "Effective Date") of the merger between the Issuer and Telaria, Inc. ("Telaria"), pursuant to that certain Agreement and Plan of Merger, dated as of December 19, 2019. At the closing of the merger, Telaria common stock and restricted stock units were converted to Issuer common stock and Issuer restricted stock units (the "RSUs") at an exchange ratio of 1.082. F2: Includes (i) 90,629 shares underlying RSUs that vested on the Effective Date in connection with the merger, (ii) 50,432 RSUs that will vest on July 10, 2021; (iii) 20,806 RSUs that will vest on February 14, 2022, (iv) 19,390 RSUs that will vest on February 14, 2022, and (v) 19,391 RSUs that will vest on February 14, 2023, in each case subject to the Reporting Person providing Continuous Service to the Issuer on each such date.
Common StockSEC Table I · non-derivative	Direct	436,917	Reported balance After 2020-04-01 transaction · row 2 Account or security details depend on footnotes; rows are not merged. 1 source row Row 2 · 2020-04-01 · Grant · Acquired 87,996 · Balance 436,917 F3: Grant to the Reporting Person of an RSU. Each RSU represents a contingent right to receive one share of common stock of the Issuer. The shares underlying the RSU will vest in full on October 1, 2020, provided the Reporting Person continues to provide services to the Issuer on such vesting date.
Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $3.61 · Expires 2028-02-27	Direct	168,412	Reported balance After 2020-04-01 transaction · row 3 Instrument identity requires review; Table II rows are not merged. 1 source row Row 3 · 2020-04-01 · Grant · Acquired 168,412 · Balance 168,412 F4: 25% of the total number of shares underlying this option vested on February 14, 2019 and the remaining shares were scheduled to vest 1/48 per month over the next 36 months thereafter, subject to continued service to the Issuer through each vesting date. In connection with the merger, vesting was partially accelerated so that on the Effective Date, the Reporting Person immediately vested in that number of shares underlying the option as if he had provided an additional 12 months of continuous service as of the Effective Date. Commencing on April 14, 2021, subject to continuous service, the shares underlying the options will continue to vest 1/48 per month until full vested.
Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $5.16 · Expires 2029-02-28	Direct	73,192	Reported balance After 2020-04-01 transaction · row 4 Instrument identity requires review; Table II rows are not merged. 1 source row Row 4 · 2020-04-01 · Grant · Acquired 73,192 · Balance 73,192 F5: 25% of the total number of shares underlying this option vested on February 14, 2020 and the remaining shares were scheduled to vest 1/48 per month over the next 36 months thereafter, subject to continued service to the Issuer through each vesting date. In connection with the merger, vesting was partially accelerated so that on the Effective Date, the Reporting Person immediately vested in that number of shares underlying the option as if he had provided an additional 12 months of continuous service on the Effective Date. Commencing on April 14, 2021, subject to continuous service, the shares underlying the options will continue to vest 1/48 per month until fully vested.
Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $2.19 · Expires 2027-07-10	Direct	486,900	Reported balance After 2020-04-01 transaction · row 5 Instrument identity requires review; Table II rows are not merged. 1 source row Row 5 · 2020-04-01 · Grant · Acquired 486,900 · Balance 486,900 F6: 25% of the total number of shares underlying this option vested on July 10, 2018 and the remaining shares were scheduled to vest 1/48 per month over the next 36 months thereafter, subject to continued service to the Issuer through each vesting date. In connection with the merger, vesting was partially accelerated so that on the Effective Date, the Reporting Person immediately vested in that number of shares underlying the option as if he had provided an additional 12 months of continuous service as of the Effective Date. Commencing on April 10, 2021, subject to continuous service, the shares underlying the options will continue to vest 1/48 per month until fully vested.
Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $2.19 · Expires 2027-07-10	Direct	486,900	Reported balance After 2020-04-01 transaction · row 6 Instrument identity requires review; Table II rows are not merged. 1 source row Row 6 · 2020-04-01 · Grant · Acquired 486,900 · Balance 486,900 F7: The shares underlying this option are fully vested. 50% of the shares underlying the option are currently exercisable and 50% of the shares underlying the option will be exercisable in September 2020, subject to continued service to the Issuer

Filing footnotes · ownership attribution and instrument terms

F1: Received on April 1, 2020, the effective date (the "Effective Date") of the merger between the Issuer and Telaria, Inc. ("Telaria"), pursuant to that certain Agreement and Plan of Merger, dated as of December 19, 2019. At the closing of the merger, Telaria common stock and restricted stock units were converted to Issuer common stock and Issuer restricted stock units (the "RSUs") at an exchange ratio of 1.082.

F2: Includes (i) 90,629 shares underlying RSUs that vested on the Effective Date in connection with the merger, (ii) 50,432 RSUs that will vest on July 10, 2021; (iii) 20,806 RSUs that will vest on February 14, 2022, (iv) 19,390 RSUs that will vest on February 14, 2022, and (v) 19,391 RSUs that will vest on February 14, 2023, in each case subject to the Reporting Person providing Continuous Service to the Issuer on each such date.

F3: Grant to the Reporting Person of an RSU. Each RSU represents a contingent right to receive one share of common stock of the Issuer. The shares underlying the RSU will vest in full on October 1, 2020, provided the Reporting Person continues to provide services to the Issuer on such vesting date.

F4: 25% of the total number of shares underlying this option vested on February 14, 2019 and the remaining shares were scheduled to vest 1/48 per month over the next 36 months thereafter, subject to continued service to the Issuer through each vesting date. In connection with the merger, vesting was partially accelerated so that on the Effective Date, the Reporting Person immediately vested in that number of shares underlying the option as if he had provided an additional 12 months of continuous service as of the Effective Date. Commencing on April 14, 2021, subject to continuous service, the shares underlying the options will continue to vest 1/48 per month until full vested.

F5: 25% of the total number of shares underlying this option vested on February 14, 2020 and the remaining shares were scheduled to vest 1/48 per month over the next 36 months thereafter, subject to continued service to the Issuer through each vesting date. In connection with the merger, vesting was partially accelerated so that on the Effective Date, the Reporting Person immediately vested in that number of shares underlying the option as if he had provided an additional 12 months of continuous service on the Effective Date. Commencing on April 14, 2021, subject to continuous service, the shares underlying the options will continue to vest 1/48 per month until fully vested.

F6: 25% of the total number of shares underlying this option vested on July 10, 2018 and the remaining shares were scheduled to vest 1/48 per month over the next 36 months thereafter, subject to continued service to the Issuer through each vesting date. In connection with the merger, vesting was partially accelerated so that on the Effective Date, the Reporting Person immediately vested in that number of shares underlying the option as if he had provided an additional 12 months of continuous service as of the Effective Date. Commencing on April 10, 2021, subject to continuous service, the shares underlying the options will continue to vest 1/48 per month until fully vested.

F7: The shares underlying this option are fully vested. 50% of the shares underlying the option are currently exercisable and 50% of the shares underlying the option will be exercisable in September 2020, subject to continued service to the Issuer

Teads Holding Co.

Report date May 13, 2026 · Filed May 18, 2026

Security / award	Ownership account	Disclosed shares / units	Disclosure context
Common StockSEC Table I · non-derivative	Direct	72,500	Reported balance After 2026-05-13 transaction · row 1 1 source row Row 1 · 2026-05-13 · Grant · Acquired 20,000 · Balance 72,500 F1: Restricted stock units granted pursuant to the Issuer's 2021 Long-Term Incentive Plan which vest in twelve equal increments over a period of three years beginning June 5, 2026, and on each quarterly anniversary thereof.

Filing footnotes · ownership attribution and instrument terms

F1: Restricted stock units granted pursuant to the Issuer's 2021 Long-Term Incentive Plan which vest in twelve equal increments over a period of three years beginning June 5, 2026, and on each quarterly anniversary thereof.

Past disclosures · reporting ended (1)

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

Telaria, Inc.

Report date April 01, 2020 · Filed April 03, 2020

Section 16 reporting ended · disclosed 2020-04-03. Current position is not established by this disclosure.

Security / award	Ownership account	Disclosure context
Common StockSEC Table I · non-derivative	Direct	Reported balance After 2020-04-01 transaction · row 1 1 source row Row 1 · 2020-04-01 · Disposition to issuer · Disposed 137,036 · Balance 0 F1: On April 1, 2020, the effective date (the "Effective Date") of the merger between the Issuer and The Rubicon Project, Inc. ("Rubicon"), each share of Issuer common stock was exchanged for 1.082 shares of Rubicon common stock.
Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $3.90 · Expires 2028-02-27	Direct	Reported balance After 2020-04-01 transaction · row 2 Instrument identity requires review; Table II rows are not merged. 1 source row Row 2 · 2020-04-01 · Disposition to issuer · Disposed 155,650 · Balance 0 F2: These options were assumed by Rubicon pursuant to the merger agreement on the Effective Date with the same vesting and other terms at the rate of 1.082 Rubicon options for each Issuer option, rounded down to the nearest whole share, and with an exercise price per share of each Rubicon option equal to the exercise price herein divided by 1.082, rounded up to the nearest cent.
Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $5.58 · Expires 2029-02-28	Direct	Reported balance After 2020-04-01 transaction · row 3 Instrument identity requires review; Table II rows are not merged. 1 source row Row 3 · 2020-04-01 · Disposition to issuer · Disposed 67,646 · Balance 0 F2: These options were assumed by Rubicon pursuant to the merger agreement on the Effective Date with the same vesting and other terms at the rate of 1.082 Rubicon options for each Issuer option, rounded down to the nearest whole share, and with an exercise price per share of each Rubicon option equal to the exercise price herein divided by 1.082, rounded up to the nearest cent.
Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $2.36 · Expires 2027-07-10	Direct	Reported balance After 2020-04-01 transaction · row 4 Instrument identity requires review; Table II rows are not merged. 1 source row Row 4 · 2020-04-01 · Disposition to issuer · Disposed 450,000 · Balance 0 F2: These options were assumed by Rubicon pursuant to the merger agreement on the Effective Date with the same vesting and other terms at the rate of 1.082 Rubicon options for each Issuer option, rounded down to the nearest whole share, and with an exercise price per share of each Rubicon option equal to the exercise price herein divided by 1.082, rounded up to the nearest cent.
Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $2.36 · Expires 2027-07-10	Direct	Reported balance After 2020-04-01 transaction · row 5 Instrument identity requires review; Table II rows are not merged. 1 source row Row 5 · 2020-04-01 · Disposition to issuer · Disposed 450,000 · Balance 0 F2: These options were assumed by Rubicon pursuant to the merger agreement on the Effective Date with the same vesting and other terms at the rate of 1.082 Rubicon options for each Issuer option, rounded down to the nearest whole share, and with an exercise price per share of each Rubicon option equal to the exercise price herein divided by 1.082, rounded up to the nearest cent.
Restricted Stock UnitSEC Table II · derivative / convertible security · Conversion / exercise price $0.00	Direct	Reported balance After 2020-04-01 transaction · row 6 Instrument identity requires review; Table II rows are not merged. 1 source row Row 6 · 2020-04-01 · Disposition to issuer · Disposed 93,220 · Balance 0 F3: Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock. F4: On the Effective Date, pursuant to the merger agreement, restricted stock units were assumed by Rubicon, with the same vesting and other terms, at an exchange ratio of 1.082 Rubicon restricted stock units for each Issuer restricted stock unit reported herein, rounded down to the nearest whole share.
Restricted Stock UnitSEC Table II · derivative / convertible security · Conversion / exercise price $0.00	Direct	Reported balance After 2020-04-01 transaction · row 7 Instrument identity requires review; Table II rows are not merged. 1 source row Row 7 · 2020-04-01 · Disposition to issuer · Disposed 38,461 · Balance 0 F3: Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock. F4: On the Effective Date, pursuant to the merger agreement, restricted stock units were assumed by Rubicon, with the same vesting and other terms, at an exchange ratio of 1.082 Rubicon restricted stock units for each Issuer restricted stock unit reported herein, rounded down to the nearest whole share.
Restricted Stock UnitSEC Table II · derivative / convertible security · Conversion / exercise price $0.00	Direct	Reported balance After 2020-04-01 transaction · row 8 Instrument identity requires review; Table II rows are not merged. 1 source row Row 8 · 2020-04-01 · Disposition to issuer · Disposed 53,763 · Balance 0 F3: Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock. F4: On the Effective Date, pursuant to the merger agreement, restricted stock units were assumed by Rubicon, with the same vesting and other terms, at an exchange ratio of 1.082 Rubicon restricted stock units for each Issuer restricted stock unit reported herein, rounded down to the nearest whole share.

Filing footnotes · ownership attribution and instrument terms

F1: On April 1, 2020, the effective date (the "Effective Date") of the merger between the Issuer and The Rubicon Project, Inc. ("Rubicon"), each share of Issuer common stock was exchanged for 1.082 shares of Rubicon common stock.

F2: These options were assumed by Rubicon pursuant to the merger agreement on the Effective Date with the same vesting and other terms at the rate of 1.082 Rubicon options for each Issuer option, rounded down to the nearest whole share, and with an exercise price per share of each Rubicon option equal to the exercise price herein divided by 1.082, rounded up to the nearest cent.

F3: Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

F4: On the Effective Date, pursuant to the merger agreement, restricted stock units were assumed by Rubicon, with the same vesting and other terms, at an exchange ratio of 1.082 Rubicon restricted stock units for each Issuer restricted stock unit reported herein, rounded down to the nearest whole share.

Transaction history

JSON API

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 date	Company	Activity / security	Shares / units	Reported price	Reported value	Details
May 31, 2024 Filed Jun 18, 2024 20:01 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	PurchaseCommon Stock	712	$15.47	$11,014.64	Disclosure SEC source: 0000950170-24-074820 · ownership.xml · nonDerivative · entry 1 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 383,317 F1 · kind: Pursuant to the DoubleVerify Holdings, Inc. 2021 Employee Stock Purchase Plan (ESPP), the purchase price per share reported reflects a discount of 15% of the lesser of the share price at the first day of the offering period or the purchase date. F1 · price: Pursuant to the DoubleVerify Holdings, Inc. 2021 Employee Stock Purchase Plan (ESPP), the purchase price per share reported reflects a discount of 15% of the lesser of the share price at the first day of the offering period or the purchase date. Read SEC document
April 25, 2024 Filed Apr 26, 2024 21:07 UTC	Teads Holding Co. OB · Entity 7241	GrantCommon Stock	30,000	$0.00	$0.00	Disclosure SEC source: 0001454938-24-000064 · wk-form4_1714165633.xml · nonDerivative · entry 1 Zagorski Mark · CIK 0001709574 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 32,500 F1 · price: Restricted stock units granted pursuant to the Company's 2021 Long Term Incentive Plan which vest in twelve equal increments beginning on June 5, 2024, and on each quarterly anniversary thereof. Read SEC document
March 31, 2024 Filed Apr 2, 2024 20:04 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Exercise / conversionRestricted Stock Units · Derivative	10,417	$0.00	$0.00	Disclosure SEC source: 0001209191-24-005174 · doc4.xml · derivative · entry 3 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 20,832 Underlying: Common Stock · 10,417 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. F3 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis. F1 · derivative.exercise_date: Each restricted stock unit ("RSU") was granted on July 28, 2020 and represents a right to receive one share of common stock on a one-to-one basis. 37.5% of the RSUs vested and were settled on April 20, 2021, upon the initial public offering (the "IPO") of common stock of DoubleVerify Holdings, Inc. The remaining RSUs vest on the original vesting schedule as though the IPO had not occurred, subject to Mr. Zagorksi's continued employment through the applicable vesting date. F1 · derivative.expiration_date: Each restricted stock unit ("RSU") was granted on July 28, 2020 and represents a right to receive one share of common stock on a one-to-one basis. 37.5% of the RSUs vested and were settled on April 20, 2021, upon the initial public offering (the "IPO") of common stock of DoubleVerify Holdings, Inc. The remaining RSUs vest on the original vesting schedule as though the IPO had not occurred, subject to Mr. Zagorksi's continued employment through the applicable vesting date. Read SEC document
March 31, 2024 Filed Apr 2, 2024 20:04 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Tax withholdingCommon Stock	5,761	$35.16	$202,556.76	Disclosure SEC source: 0001209191-24-005174 · doc4.xml · nonDerivative · entry 2 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 382,605 F2 · kind: Represents shares withheld to satisfy tax obligations in connection with the vesting of 10,417 RSUs on March 31, 2024. Read SEC document
March 31, 2024 Filed Apr 2, 2024 20:04 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Exercise / conversionCommon Stock	10,417	$0.00	$0.00	Disclosure SEC source: 0001209191-24-005174 · doc4.xml · nonDerivative · entry 1 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 388,366 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 · price: Each restricted stock unit ("RSU") was granted on July 28, 2020 and represents a right to receive one share of common stock on a one-to-one basis. 37.5% of the RSUs vested and were settled on April 20, 2021, upon the initial public offering (the "IPO") of common stock of DoubleVerify Holdings, Inc. The remaining RSUs vest on the original vesting schedule as though the IPO had not occurred, subject to Mr. Zagorksi's continued employment through the applicable vesting date. Read SEC document
March 15, 2024 Filed Mar 19, 2024 20:05 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Exercise / conversionRestricted Stock Units · Derivative	7,802	$0.00	$0.00	Disclosure SEC source: 0001209191-24-004920 · doc4.xml · derivative · entry 7 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 117,025 Underlying: Common Stock · 7,802 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. F5 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis. F3 · derivative.exercise_date: The restricted stock units were granted on December 19, 2023. 6.25% of the restricted stock units vested and were settled on March 15, 2024 (the "2024 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the 2024 Vesting Date. F3 · derivative.expiration_date: The restricted stock units were granted on December 19, 2023. 6.25% of the restricted stock units vested and were settled on March 15, 2024 (the "2024 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the 2024 Vesting Date. Read SEC document
March 15, 2024 Filed Mar 19, 2024 20:05 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Exercise / conversionRestricted Stock Units · Derivative	9,375	$0.00	$0.00	Disclosure SEC source: 0001209191-24-004920 · doc4.xml · derivative · entry 6 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 103,125 Underlying: Common Stock · 9,375 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. F5 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis. F6 · shares: As reported previously, vested shares will be delivered to the reporting person as soon as administratively feasible following his separation from service with the Issuer. F7 · derivative.exercise_date: The restricted stock units were granted on December 12, 2022. 6.25% of the restricted stock units vested on March 15, 2023 (the "2023 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the 2023 Vesting Date. F7 · derivative.expiration_date: The restricted stock units were granted on December 12, 2022. 6.25% of the restricted stock units vested on March 15, 2023 (the "2023 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the 2023 Vesting Date. F6 · derivative.underlying_shares: As reported previously, vested shares will be delivered to the reporting person as soon as administratively feasible following his separation from service with the Issuer. Read SEC document
March 15, 2024 Filed Mar 19, 2024 20:05 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Exercise / conversionRestricted Stock Units · Derivative	6,471	$0.00	$0.00	Disclosure SEC source: 0001209191-24-004920 · doc4.xml · derivative · entry 5 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 45,297 Underlying: Common Stock · 6,471 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. F5 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis. F1 · derivative.exercise_date: The restricted stock units were granted on December 10, 2021. 6.25% of the restricted stock units vested and were settled on March 15, 2022 (the "2022 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the 2022 Vesting Date. F1 · derivative.expiration_date: The restricted stock units were granted on December 10, 2021. 6.25% of the restricted stock units vested and were settled on March 15, 2022 (the "2022 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the 2022 Vesting Date. Read SEC document
March 15, 2024 Filed Mar 19, 2024 20:05 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Tax withholdingCommon Stock	3,420	$33.09	$113,167.80	Disclosure SEC source: 0001209191-24-004920 · doc4.xml · nonDerivative · entry 4 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 377,949 F4 · kind: Represents shares withheld to satisfy tax obligations in connection with the vesting of 7,802 RSUs on March 15, 2024. Read SEC document
March 15, 2024 Filed Mar 19, 2024 20:05 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Exercise / conversionCommon Stock	7,802	$0.00	$0.00	Disclosure SEC source: 0001209191-24-004920 · doc4.xml · nonDerivative · entry 3 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 381,369 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 · price: The restricted stock units were granted on December 19, 2023. 6.25% of the restricted stock units vested and were settled on March 15, 2024 (the "2024 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the 2024 Vesting Date. Read SEC document
March 15, 2024 Filed Mar 19, 2024 20:05 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Tax withholdingCommon Stock	2,608	$33.09	$86,298.72	Disclosure SEC source: 0001209191-24-004920 · doc4.xml · nonDerivative · entry 2 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 373,567 F2 · kind: Represents shares withheld to satisfy tax obligations in connection with the vesting of 6,471 RSUs on March 15, 2024. Read SEC document
March 15, 2024 Filed Mar 19, 2024 20:05 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Exercise / conversionCommon Stock	6,471	$0.00	$0.00	Disclosure SEC source: 0001209191-24-004920 · doc4.xml · nonDerivative · entry 1 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 376,175 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 · price: The restricted stock units were granted on December 10, 2021. 6.25% of the restricted stock units vested and were settled on March 15, 2022 (the "2022 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the 2022 Vesting Date. Read SEC document
December 31, 2023 Filed Jan 3, 2024 21:07 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Exercise / conversionRestricted Stock Units · Derivative	10,416	$0.00	$0.00	Disclosure SEC source: 0001209191-24-000334 · doc4.xml · derivative · entry 3 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 31,249 Underlying: Common Stock · 10,416 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. F3 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis. F1 · derivative.exercise_date: Each restricted stock unit ("RSU") was granted on July 28, 2020 and represents a right to receive one share of common stock on a one-to-one basis. 37.5% of the RSUs vested and were settled on April 20, 2021, upon the initial public offering (the "IPO") of common stock of DoubleVerify Holdings, Inc. The remaining RSUs vest on the original vesting schedule as though the IPO had not occurred, subject to Mr. Zagorksi's continued employment through the applicable vesting date. F1 · derivative.expiration_date: Each restricted stock unit ("RSU") was granted on July 28, 2020 and represents a right to receive one share of common stock on a one-to-one basis. 37.5% of the RSUs vested and were settled on April 20, 2021, upon the initial public offering (the "IPO") of common stock of DoubleVerify Holdings, Inc. The remaining RSUs vest on the original vesting schedule as though the IPO had not occurred, subject to Mr. Zagorksi's continued employment through the applicable vesting date. Read SEC document
December 31, 2023 Filed Jan 3, 2024 21:07 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Tax withholdingCommon Stock	5,761	$36.78	$211,889.58	Disclosure SEC source: 0001209191-24-000334 · doc4.xml · nonDerivative · entry 2 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 369,704 F2 · kind: Represents shares withheld to satisfy tax obligations in connection with the vesting of 10,416 RSUs on December 31, 2023. Read SEC document
December 31, 2023 Filed Jan 3, 2024 21:07 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Exercise / conversionCommon Stock	10,416	$0.00	$0.00	Disclosure SEC source: 0001209191-24-000334 · doc4.xml · nonDerivative · entry 1 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 375,465 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 · price: Each restricted stock unit ("RSU") was granted on July 28, 2020 and represents a right to receive one share of common stock on a one-to-one basis. 37.5% of the RSUs vested and were settled on April 20, 2021, upon the initial public offering (the "IPO") of common stock of DoubleVerify Holdings, Inc. The remaining RSUs vest on the original vesting schedule as though the IPO had not occurred, subject to Mr. Zagorksi's continued employment through the applicable vesting date. Read SEC document
December 19, 2023 Filed Dec 21, 2023 22:01 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	GrantRestricted Stock Units · Derivative	124,827	$0.00	$0.00	Disclosure SEC source: 0001209191-23-059455 · doc4.xml · derivative · entry 2 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 124,827 Underlying: Common Stock · 124,827 shares Expires not disclosed F2 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis. F3 · derivative.exercise_date: The restricted stock units vest 6.25% on March 15, 2024 (the "Vesting Date") and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the Vesting Date. F3 · derivative.expiration_date: The restricted stock units vest 6.25% on March 15, 2024 (the "Vesting Date") and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the Vesting Date. Read SEC document
December 15, 2023 Filed Dec 19, 2023 21:02 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Exercise / conversionRestricted Stock Units · Derivative	9,375	$0.00	$0.00	Disclosure SEC source: 0001209191-23-059108 · doc4.xml · derivative · entry 4 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 112,500 Underlying: Common Stock · 9,375 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. F3 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis. F4 · shares: As reported previously, vested shares will be delivered to the reporting person as soon as administratively feasible following his separation from service with the Issuer. F5 · derivative.exercise_date: The restricted stock units were granted on December 12, 2022. 6.25% of the restricted stock units vested on March 15, 2023 (the "2023 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the 2023 Vesting Date. F5 · derivative.expiration_date: The restricted stock units were granted on December 12, 2022. 6.25% of the restricted stock units vested on March 15, 2023 (the "2023 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the 2023 Vesting Date. F4 · derivative.underlying_shares: As reported previously, vested shares will be delivered to the reporting person as soon as administratively feasible following his separation from service with the Issuer. Read SEC document
December 15, 2023 Filed Dec 19, 2023 21:02 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Exercise / conversionRestricted Stock Units · Derivative	6,471	$0.00	$0.00	Disclosure SEC source: 0001209191-23-059108 · doc4.xml · derivative · entry 3 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 51,768 Underlying: Common Stock · 6,471 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. F3 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis. F1 · derivative.exercise_date: The restricted stock units were granted on December 10, 2021. 6.25% of the restricted stock units vested and were settled on March 15, 2022 (the "2022 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the 2022 Vesting Date. F1 · derivative.expiration_date: The restricted stock units were granted on December 10, 2021. 6.25% of the restricted stock units vested and were settled on March 15, 2022 (the "2022 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the 2022 Vesting Date. Read SEC document
December 15, 2023 Filed Dec 19, 2023 21:02 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Tax withholdingCommon Stock	3,579	$35.54	$127,197.66	Disclosure SEC source: 0001209191-23-059108 · doc4.xml · nonDerivative · entry 2 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 364,660 F2 · kind: Represents shares withheld to satisfy tax obligations in connection with the vesting of 6,471 RSUs on December 15, 2023. Read SEC document
December 15, 2023 Filed Dec 19, 2023 21:02 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Exercise / conversionCommon Stock	6,471	$0.00	$0.00	Disclosure SEC source: 0001209191-23-059108 · doc4.xml · nonDerivative · entry 1 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 368,239 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 · price: The restricted stock units were granted on December 10, 2021. 6.25% of the restricted stock units vested and were settled on March 15, 2022 (the "2022 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the 2022 Vesting Date. Read SEC document
November 30, 2023 Filed Dec 21, 2023 22:01 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	PurchaseCommon Stock	389	$28.22	$10,977.58	Disclosure SEC source: 0001209191-23-059455 · doc4.xml · nonDerivative · entry 1 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 365,049 F1 · kind: Pursuant to the DoubleVerify Holdings, Inc. 2021 Employee Stock Purchase Plan (ESPP), the purchase price per share reported reflects a discount of 15% of the lesser of the share price at the first day of the offering period or the purchase date. F1 · price: Pursuant to the DoubleVerify Holdings, Inc. 2021 Employee Stock Purchase Plan (ESPP), the purchase price per share reported reflects a discount of 15% of the lesser of the share price at the first day of the offering period or the purchase date. Read SEC document
September 30, 2023 Filed Oct 3, 2023 20:04 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Exercise / conversionRestricted Stock Units · Derivative	10,417	$0.00	$0.00	Disclosure SEC source: 0001209191-23-051387 · doc4.xml · derivative · entry 3 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 41,665 Underlying: Common Stock · 10,417 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. F3 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis. F1 · derivative.exercise_date: Each restricted stock unit ("RSU") was granted on July 28, 2020 and represents a right to receive one share of common stock on a one-to-one basis. 37.5% of the RSUs vested and were settled on April 20, 2021, upon the initial public offering (the "IPO") of common stock of DoubleVerify Holdings, Inc. The remaining RSUs vest on the original vesting schedule as though the IPO had not occurred, subject to Mr. Zagorksi's continued employment through the applicable vesting date. F1 · derivative.expiration_date: Each restricted stock unit ("RSU") was granted on July 28, 2020 and represents a right to receive one share of common stock on a one-to-one basis. 37.5% of the RSUs vested and were settled on April 20, 2021, upon the initial public offering (the "IPO") of common stock of DoubleVerify Holdings, Inc. The remaining RSUs vest on the original vesting schedule as though the IPO had not occurred, subject to Mr. Zagorksi's continued employment through the applicable vesting date. Read SEC document
September 30, 2023 Filed Oct 3, 2023 20:04 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Tax withholdingCommon Stock	5,761	$27.95	$161,019.95	Disclosure SEC source: 0001209191-23-051387 · doc4.xml · nonDerivative · entry 2 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 361,768 F2 · kind: Represents shares withheld to satisfy tax obligations in connection with the vesting of 10,417 RSUs on September 30, 2023. Read SEC document
September 30, 2023 Filed Oct 3, 2023 20:04 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Exercise / conversionCommon Stock	10,417	$0.00	$0.00	Disclosure SEC source: 0001209191-23-051387 · doc4.xml · nonDerivative · entry 1 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 367,529 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 · price: Each restricted stock unit ("RSU") was granted on July 28, 2020 and represents a right to receive one share of common stock on a one-to-one basis. 37.5% of the RSUs vested and were settled on April 20, 2021, upon the initial public offering (the "IPO") of common stock of DoubleVerify Holdings, Inc. The remaining RSUs vest on the original vesting schedule as though the IPO had not occurred, subject to Mr. Zagorksi's continued employment through the applicable vesting date. Read SEC document
September 19, 2023 Filed Sep 21, 2023 20:18 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	PurchaseCommon Stock	1,765	$28.36	$50,055.40	Disclosure SEC source: 0001209191-23-050261 · doc4.xml · nonDerivative · entry 1 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 357,112 Read SEC document
September 15, 2023 Filed Sep 19, 2023 20:05 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Exercise / conversionRestricted Stock Units · Derivative	9,375	$0.00	$0.00	Disclosure SEC source: 0001209191-23-049905 · doc4.xml · derivative · entry 4 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 121,875 Underlying: Common Stock · 9,375 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. F3 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis. F4 · shares: As reported previously, vested shares will be delivered to the reporting person as soon as administratively feasible following his separation from service with the Issuer. F5 · derivative.exercise_date: The restricted stock units were granted on December 12, 2022. 6.25% of the restricted stock units vested on March 15, 2023 (the "2023 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the 2023 Vesting Date. F5 · derivative.expiration_date: The restricted stock units were granted on December 12, 2022. 6.25% of the restricted stock units vested on March 15, 2023 (the "2023 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the 2023 Vesting Date. F4 · derivative.underlying_shares: As reported previously, vested shares will be delivered to the reporting person as soon as administratively feasible following his separation from service with the Issuer. Read SEC document
September 15, 2023 Filed Sep 19, 2023 20:05 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Exercise / conversionRestricted Stock Units · Derivative	6,471	$0.00	$0.00	Disclosure SEC source: 0001209191-23-049905 · doc4.xml · derivative · entry 3 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 58,239 Underlying: Common Stock · 6,471 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. F3 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis. F1 · derivative.exercise_date: The restricted stock units were granted on December 10, 2021. 6.25% of the restricted stock units vested and were settled on March 15, 2022 (the "2022 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the 2022 Vesting Date. F1 · derivative.expiration_date: The restricted stock units were granted on December 10, 2021. 6.25% of the restricted stock units vested and were settled on March 15, 2022 (the "2022 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the 2022 Vesting Date. Read SEC document
September 15, 2023 Filed Sep 19, 2023 20:05 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Tax withholdingCommon Stock	3,579	$28.92	$103,504.68	Disclosure SEC source: 0001209191-23-049905 · doc4.xml · nonDerivative · entry 2 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 355,347 F2 · kind: Represents shares withheld to satisfy tax obligations in connection with the vesting of 6,471 RSUs on September 15, 2023. Read SEC document
September 15, 2023 Filed Sep 19, 2023 20:05 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Exercise / conversionCommon Stock	6,471	$0.00	$0.00	Disclosure SEC source: 0001209191-23-049905 · doc4.xml · nonDerivative · entry 1 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 358,926 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 · price: The restricted stock units were granted on December 10, 2021. 6.25% of the restricted stock units vested and were settled on March 15, 2022 (the "2022 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the 2022 Vesting Date. Read SEC document
June 30, 2023 Filed Jul 5, 2023 20:03 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Exercise / conversionRestricted Stock Units · Derivative	10,417	$0.00	$0.00	Disclosure SEC source: 0001209191-23-040953 · doc4.xml · derivative · entry 3 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 52,082 Underlying: Common Stock · 10,417 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. F3 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis. F1 · derivative.exercise_date: Each restricted stock unit ("RSU") was granted on July 28, 2020 and represents a right to receive one share of common stock on a one-to-one basis. 37.5% of the RSUs vested and were settled on April 20, 2021, upon the initial public offering (the "IPO") of common stock of DoubleVerify Holdings, Inc. The remaining RSUs vest on the original vesting schedule as though the IPO had not occurred, subject to Mr. Zagorksi's continued employment through the applicable vesting date. F1 · derivative.expiration_date: Each restricted stock unit ("RSU") was granted on July 28, 2020 and represents a right to receive one share of common stock on a one-to-one basis. 37.5% of the RSUs vested and were settled on April 20, 2021, upon the initial public offering (the "IPO") of common stock of DoubleVerify Holdings, Inc. The remaining RSUs vest on the original vesting schedule as though the IPO had not occurred, subject to Mr. Zagorksi's continued employment through the applicable vesting date. Read SEC document
June 30, 2023 Filed Jul 5, 2023 20:03 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Tax withholdingCommon Stock	5,978	$38.92	$232,663.76	Disclosure SEC source: 0001209191-23-040953 · doc4.xml · nonDerivative · entry 2 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 352,455 F2 · kind: Represents shares withheld to satisfy tax obligations in connection with the vesting of 10,417 RSUs on June 30, 2023. Read SEC document
June 30, 2023 Filed Jul 5, 2023 20:03 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Exercise / conversionCommon Stock	10,417	$0.00	$0.00	Disclosure SEC source: 0001209191-23-040953 · doc4.xml · nonDerivative · entry 1 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 358,433 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 · price: Each restricted stock unit ("RSU") was granted on July 28, 2020 and represents a right to receive one share of common stock on a one-to-one basis. 37.5% of the RSUs vested and were settled on April 20, 2021, upon the initial public offering (the "IPO") of common stock of DoubleVerify Holdings, Inc. The remaining RSUs vest on the original vesting schedule as though the IPO had not occurred, subject to Mr. Zagorksi's continued employment through the applicable vesting date. Read SEC document
June 15, 2023 Filed Jun 20, 2023 20:05 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Exercise / conversionRestricted Stock Units · Derivative	9,375	$0.00	$0.00	Disclosure SEC source: 0001209191-23-038341 · doc4.xml · derivative · entry 4 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 131,250 Underlying: Common Stock · 9,375 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. F3 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis. F4 · shares: As reported previously, vested shares will be delivered to the reporting person as soon as administratively feasible following his separation from service with the Issuer. F5 · derivative.exercise_date: The restricted stock units were granted on December 12, 2022. 6.25% of the restricted stock units vested on March 15, 2023 (the "2023 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the 2023 Vesting Date. F5 · derivative.expiration_date: The restricted stock units were granted on December 12, 2022. 6.25% of the restricted stock units vested on March 15, 2023 (the "2023 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the 2023 Vesting Date. F4 · derivative.underlying_shares: As reported previously, vested shares will be delivered to the reporting person as soon as administratively feasible following his separation from service with the Issuer. Read SEC document
June 15, 2023 Filed Jun 20, 2023 20:05 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Exercise / conversionRestricted Stock Units · Derivative	6,471	$0.00	$0.00	Disclosure SEC source: 0001209191-23-038341 · doc4.xml · derivative · entry 3 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 64,710 Underlying: Common Stock · 6,471 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. F3 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis. F1 · derivative.exercise_date: The restricted stock units were granted on December 10, 2021. 6.25% of the restricted stock units vested and were settled on March 15, 2022 (the "2022 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the 2022 Vesting Date. F1 · derivative.expiration_date: The restricted stock units were granted on December 10, 2021. 6.25% of the restricted stock units vested and were settled on March 15, 2022 (the "2022 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the 2022 Vesting Date. Read SEC document
June 15, 2023 Filed Jun 20, 2023 20:05 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Tax withholdingCommon Stock	3,032	$36.97	$112,093.04	Disclosure SEC source: 0001209191-23-038341 · doc4.xml · nonDerivative · entry 2 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 348,016 F2 · kind: Represents shares withheld to satisfy tax obligations in connection with the vesting of 6,471 RSUs on June 15, 2023. Read SEC document
June 15, 2023 Filed Jun 20, 2023 20:05 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Exercise / conversionCommon Stock	6,471	$0.00	$0.00	Disclosure SEC source: 0001209191-23-038341 · doc4.xml · nonDerivative · entry 1 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 351,048 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 · price: The restricted stock units were granted on December 10, 2021. 6.25% of the restricted stock units vested and were settled on March 15, 2022 (the "2022 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the 2022 Vesting Date. Read SEC document
March 31, 2023 Filed Apr 4, 2023 20:06 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Exercise / conversionRestricted Stock Units · Derivative	10,417	$0.00	$0.00	Disclosure SEC source: 0001209191-23-022655 · doc4.xml · derivative · entry 3 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 62,499 Underlying: Common Stock · 10,417 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. F3 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis. F1 · derivative.exercise_date: Each restricted stock unit ("RSU") was granted on July 28, 2020 and represents a right to receive one share of common stock on a one-to-one basis. 37.5% of the RSUs vested and were settled on April 20, 2021, upon the initial public offering (the "IPO") of common stock of DoubleVerify Holdings, Inc. The remaining RSUs vest on the original vesting schedule as though the IPO had not occurred, subject to Mr. Zagorksi's continued employment through the applicable vesting date. F1 · derivative.expiration_date: Each restricted stock unit ("RSU") was granted on July 28, 2020 and represents a right to receive one share of common stock on a one-to-one basis. 37.5% of the RSUs vested and were settled on April 20, 2021, upon the initial public offering (the "IPO") of common stock of DoubleVerify Holdings, Inc. The remaining RSUs vest on the original vesting schedule as though the IPO had not occurred, subject to Mr. Zagorksi's continued employment through the applicable vesting date. Read SEC document
March 31, 2023 Filed Apr 4, 2023 20:06 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Tax withholdingCommon Stock	4,415	$30.15	$133,112.25	Disclosure SEC source: 0001209191-23-022655 · doc4.xml · nonDerivative · entry 2 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 344,577 F2 · kind: Represents shares withheld to satisfy tax obligations in connection with the vesting of 10,417 RSUs on March 31, 2023. Read SEC document
March 31, 2023 Filed Apr 4, 2023 20:06 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Exercise / conversionCommon Stock	10,417	$0.00	$0.00	Disclosure SEC source: 0001209191-23-022655 · doc4.xml · nonDerivative · entry 1 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 348,992 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 · price: Each restricted stock unit ("RSU") was granted on July 28, 2020 and represents a right to receive one share of common stock on a one-to-one basis. 37.5% of the RSUs vested and were settled on April 20, 2021, upon the initial public offering (the "IPO") of common stock of DoubleVerify Holdings, Inc. The remaining RSUs vest on the original vesting schedule as though the IPO had not occurred, subject to Mr. Zagorksi's continued employment through the applicable vesting date. Read SEC document
March 15, 2023 Filed Mar 17, 2023 20:14 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Exercise / conversionRestricted Stock Units · Derivative	9,375	$0.00	$0.00	Disclosure SEC source: 0001209191-23-019622 · doc4.xml · derivative · entry 4 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 140,625 Underlying: Common Stock · 9,375 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. F3 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis. F4 · shares: As reported previously, vested shares will be delivered to the reporting person as soon as administratively feasible following his separation from service with the Issuer. F5 · derivative.exercise_date: The restricted stock units were granted on December 12, 2022. 6.25% of the restricted stock units vested on March 15, 2023 (the "2023 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the 2023 Vesting Date. F5 · derivative.expiration_date: The restricted stock units were granted on December 12, 2022. 6.25% of the restricted stock units vested on March 15, 2023 (the "2023 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the 2023 Vesting Date. F4 · derivative.underlying_shares: As reported previously, vested shares will be delivered to the reporting person as soon as administratively feasible following his separation from service with the Issuer. Read SEC document
March 15, 2023 Filed Mar 17, 2023 20:14 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Exercise / conversionRestricted Stock Units · Derivative	6,471	$0.00	$0.00	Disclosure SEC source: 0001209191-23-019622 · doc4.xml · derivative · entry 3 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 71,181 Underlying: Common Stock · 6,471 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. F3 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis. F1 · derivative.exercise_date: The restricted stock units were granted on December 10, 2021. 6.25% of the restricted stock units vested and were settled on March 15, 2022 (the "2022 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the 2022 Vesting Date. F1 · derivative.expiration_date: The restricted stock units were granted on December 10, 2021. 6.25% of the restricted stock units vested and were settled on March 15, 2022 (the "2022 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the 2022 Vesting Date. Read SEC document
March 15, 2023 Filed Mar 17, 2023 20:14 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Tax withholdingCommon Stock	2,825	$24.60	$69,495.00	Disclosure SEC source: 0001209191-23-019622 · doc4.xml · nonDerivative · entry 2 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 338,575 F2 · kind: Represents shares withheld to satisfy tax obligations in connection with the vesting of 6,471 RSUs on March 15, 2023. Read SEC document
March 15, 2023 Filed Mar 17, 2023 20:14 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Exercise / conversionCommon Stock	6,471	$0.00	$0.00	Disclosure SEC source: 0001209191-23-019622 · doc4.xml · nonDerivative · entry 1 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 341,400 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 · price: The restricted stock units were granted on December 10, 2021. 6.25% of the restricted stock units vested and were settled on March 15, 2022 (the "2022 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the 2022 Vesting Date. Read SEC document
December 31, 2022 Filed Jan 4, 2023 21:03 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Exercise / conversionRestricted Stock Units · Derivative	10,417	$0.00	$0.00	Disclosure SEC source: 0001209191-23-000818 · doc4.xml · derivative · entry 3 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 72,916 Underlying: Common Stock · 10,417 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. F3 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis. F1 · derivative.exercise_date: Each restricted stock unit ("RSU") was granted on July 28, 2020 and represents a right to receive one share of common stock on a one-to-one basis. 37.5% of the RSUs vested and were settled on April 20, 2021, upon the initial public offering (the "IPO") of common stock of DoubleVerify Holdings, Inc. The remaining RSUs vest on the original vesting schedule as though the IPO had not occurred, subject to Mr. Zagorksi's continued employment through the applicable vesting date. F1 · derivative.expiration_date: Each restricted stock unit ("RSU") was granted on July 28, 2020 and represents a right to receive one share of common stock on a one-to-one basis. 37.5% of the RSUs vested and were settled on April 20, 2021, upon the initial public offering (the "IPO") of common stock of DoubleVerify Holdings, Inc. The remaining RSUs vest on the original vesting schedule as though the IPO had not occurred, subject to Mr. Zagorksi's continued employment through the applicable vesting date. Read SEC document
December 31, 2022 Filed Jan 4, 2023 21:03 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Tax withholdingCommon Stock	5,978	$21.96	$131,276.88	Disclosure SEC source: 0001209191-23-000818 · doc4.xml · nonDerivative · entry 2 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 334,929 F2 · kind: Represents shares withheld to satisfy tax obligations in connection with the vesting of 10,417 RSUs on December 31, 2022. Read SEC document
December 31, 2022 Filed Jan 4, 2023 21:03 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Exercise / conversionCommon Stock	10,417	$0.00	$0.00	Disclosure SEC source: 0001209191-23-000818 · doc4.xml · nonDerivative · entry 1 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 340,907 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 · price: Each restricted stock unit ("RSU") was granted on July 28, 2020 and represents a right to receive one share of common stock on a one-to-one basis. 37.5% of the RSUs vested and were settled on April 20, 2021, upon the initial public offering (the "IPO") of common stock of DoubleVerify Holdings, Inc. The remaining RSUs vest on the original vesting schedule as though the IPO had not occurred, subject to Mr. Zagorksi's continued employment through the applicable vesting date. Read SEC document
December 15, 2022 Filed Dec 19, 2022 21:12 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Exercise / conversionRestricted Stock Units · Derivative	6,471	$0.00	$0.00	Disclosure SEC source: 0001209191-22-061874 · doc4.xml · derivative · entry 3 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 77,652 Underlying: Common Stock · 6,471 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. F3 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis. F1 · derivative.exercise_date: The restricted stock units were granted on December 10, 2021. 6.25% of the restricted stock units vested and were settled on March 15, 2022 (the "Vesting Date"), and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the Vesting Date. F1 · derivative.expiration_date: The restricted stock units were granted on December 10, 2021. 6.25% of the restricted stock units vested and were settled on March 15, 2022 (the "Vesting Date"), and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the Vesting Date. Read SEC document
December 15, 2022 Filed Dec 19, 2022 21:12 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Tax withholdingCommon Stock	3,714	$24.63	$91,475.82	Disclosure SEC source: 0001209191-22-061874 · doc4.xml · nonDerivative · entry 2 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 330,490 F2 · kind: Represents shares withheld to satisfy tax obligations in connection with the vesting of 6,471 RSUs on December 15, 2022. Read SEC document
December 15, 2022 Filed Dec 19, 2022 21:12 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	Exercise / conversionCommon Stock	6,471	$0.00	$0.00	Disclosure SEC source: 0001209191-22-061874 · doc4.xml · nonDerivative · entry 1 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 334,204 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 · price: The restricted stock units were granted on December 10, 2021. 6.25% of the restricted stock units vested and were settled on March 15, 2022 (the "Vesting Date"), and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the Vesting Date. Read SEC document
December 12, 2022 Filed Dec 14, 2022 23:52 UTC	DoubleVerify Holdings, Inc. DV · Entity 4486	GrantOptions (Rights to Buy) · Derivative	303,890	$0.00 Strike: $25.00	$0.00	Disclosure SEC source: 0001209191-22-061307 · doc4.xml · derivative · entry 2 Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 303,890 Underlying: Common Stock · 303,890 shares Expires 2032-12-11 F2 · derivative.exercise_date: The restricted stock units and stock options vest 6.25% on March 15, 2023 (the "Vesting Date") and the remainder of the restricted stock units and stock options vest at a rate of 6.25% on each quarterly anniversary of the Vesting Date. Vested shares will be delivered to the reporting person as soon as administratively feasible following his separation from service with the Issuer. Read SEC document

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