DV

SEC source: 0001209191-21-070917 · doc4.xml · nonDerivative · entry 3

Allais Nicola T · CIK 0001854086 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 9, 2021.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $30.56 to $31.56, inclusive. The reporting person undertakes to provide to the Issuer, any security holder 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 above.

SEC source: 0001209191-21-070917 · doc4.xml · nonDerivative · entry 2

Allais Nicola T · CIK 0001854086 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 12,915

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 9, 2021.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $31.255 to $31.385, inclusive. The reporting person undertakes to provide to the Issuer, any security holder 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 above.

SEC source: 0001209191-21-070917 · doc4.xml · nonDerivative · entry 1

Allais Nicola T · CIK 0001854086 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,315

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 9, 2021.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $30.23 to $31.22, inclusive. The reporting person undertakes to provide to the Issuer, any security holder 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 above.

SEC source: 0001209191-21-069521 · doc4.xml · derivative · entry 2

McLaughlin Matthew F. · CIK 0001853874 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 56,476

Underlying: Common Stock · 56,476 shares

Expires 2031-12-09

F2 · derivative.exercise_date: The restricted stock units and stock options vest 6.25% on March 15, 2022 (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.

F3 · ownership.nature: Represents restricted stock units and stock options held by The McLaughlin Family Trust for which Mr. McLaughlin is a trustee.

SEC source: 0001209191-21-069521 · doc4.xml · derivative · entry 1

McLaughlin Matthew F. · CIK 0001853874 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 23,893

Underlying: Common Stock · 23,893 shares

Expires not disclosed

F1 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis.

F2 · derivative.exercise_date: The restricted stock units and stock options vest 6.25% on March 15, 2022 (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.

F2 · derivative.expiration_date: The restricted stock units and stock options vest 6.25% on March 15, 2022 (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.

F3 · ownership.nature: Represents restricted stock units and stock options held by The McLaughlin Family Trust for which Mr. McLaughlin is a trustee.

SEC source: 0001209191-21-069519 · doc4.xml · derivative · entry 2

Eddleman Julie · CIK 0001853942 · Global Chief Comm. Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 75,301

Underlying: Common Stock · 75,301 shares

Expires 2031-12-09

F2 · derivative.exercise_date: The restricted stock units and stock options vest 6.25% on March 15, 2022 (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.

SEC source: 0001209191-21-069519 · doc4.xml · derivative · entry 1

Eddleman Julie · CIK 0001853942 · Global Chief Comm. Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 31,857

Underlying: Common Stock · 31,857 shares

Expires not disclosed

F1 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis.

F2 · derivative.exercise_date: The restricted stock units and stock options vest 6.25% on March 15, 2022 (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.

F2 · derivative.expiration_date: The restricted stock units and stock options vest 6.25% on March 15, 2022 (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.

SEC source: 0001209191-21-069516 · doc4.xml · derivative · entry 4

Allais Nicola T · CIK 0001854086 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 19,410

Underlying: Common Stock · 19,410 shares

Expires 2031-12-09

F3 · derivative.exercise_date: The restricted stock units and stock options vest 50% on each of December 15, 2022 and December 15, 2023.

SEC source: 0001209191-21-069516 · doc4.xml · derivative · entry 3

Allais Nicola T · CIK 0001854086 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 94,127

Underlying: Common Stock · 94,127 shares

Expires 2031-12-09

F2 · derivative.exercise_date: The restricted stock units and stock options vest 6.25% on March 15, 2022 (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.

SEC source: 0001209191-21-069516 · doc4.xml · derivative · entry 2

Allais Nicola T · CIK 0001854086 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,964

Underlying: Common Stock · 7,964 shares

Expires not disclosed

F1 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis.

F3 · derivative.exercise_date: The restricted stock units and stock options vest 50% on each of December 15, 2022 and December 15, 2023.

F3 · derivative.expiration_date: The restricted stock units and stock options vest 50% on each of December 15, 2022 and December 15, 2023.

SEC source: 0001209191-21-069516 · doc4.xml · derivative · entry 1

Allais Nicola T · CIK 0001854086 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 39,822

Underlying: Common Stock · 39,822 shares

Expires not disclosed

F1 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis.

F2 · derivative.exercise_date: The restricted stock units and stock options vest 6.25% on March 15, 2022 (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.

F2 · derivative.expiration_date: The restricted stock units and stock options vest 6.25% on March 15, 2022 (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.

SEC source: 0001209191-21-069520 · doc4.xml · derivative · entry 3

Grimmig Andrew E · CIK 0001854079 · Chief Legal Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 56,476

Underlying: Common Stock · 56,476 shares

Expires 2031-12-09

F3 · derivative.exercise_date: The restricted stock units and stock options vest 6.25% on March 15, 2022 (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.

SEC source: 0001209191-21-069520 · doc4.xml · derivative · entry 2

Grimmig Andrew E · CIK 0001854079 · Chief Legal Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 23,893

Underlying: Common Stock · 23,893 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 and stock options vest 6.25% on March 15, 2022 (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.

F3 · derivative.expiration_date: The restricted stock units and stock options vest 6.25% on March 15, 2022 (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.

SEC source: 0001209191-21-069524 · doc4.xml · derivative · entry 2

Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 244,729

Underlying: Common Stock · 244,729 shares

Expires 2031-12-09

F2 · derivative.exercise_date: The restricted stock units and stock options vest 6.25% on March 15, 2022 (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.

SEC source: 0001209191-21-069524 · doc4.xml · derivative · entry 1

Zagorski Mark · CIK 0001709574 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 103,536

Underlying: Common Stock · 103,536 shares

Expires not disclosed

F1 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis.

F2 · derivative.exercise_date: The restricted stock units and stock options vest 6.25% on March 15, 2022 (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.

F2 · derivative.expiration_date: The restricted stock units and stock options vest 6.25% on March 15, 2022 (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.

SEC source: 0001209191-21-068789 · doc4.xml · nonDerivative · entry 4

Allais Nicola T · CIK 0001854086 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 25,830

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 9, 2021.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $32.55 to $33.07, inclusive. The reporting person undertakes to provide to the Issuer, any security holder 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 above.

SEC source: 0001209191-21-068789 · doc4.xml · nonDerivative · entry 3

Allais Nicola T · CIK 0001854086 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 33,537

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 9, 2021.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $31.55 to $32.54, inclusive. The reporting person undertakes to provide to the Issuer, any security holder 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 above.

SEC source: 0001209191-21-068789 · doc4.xml · nonDerivative · entry 2

Allais Nicola T · CIK 0001854086 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 38,745

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 9, 2021.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $32.89 to $32.965, inclusive. The reporting person undertakes to provide to the Issuer, any security holder 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 above.

SEC source: 0001209191-21-068789 · doc4.xml · nonDerivative · entry 1

Allais Nicola T · CIK 0001854086 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 39,545

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 9, 2021.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $31.89 to $32.88, inclusive. The reporting person undertakes to provide to the Issuer, any security holder 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 above.

SEC source: 0001209191-21-067582 · doc4.xml · derivative · entry 8

McLaughlin Matthew F. · CIK 0001853874 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 0

Underlying: Common Stock · 241,412 shares

Expires 2027-09-20

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.

F8 · shares: Represents non-qualified stock options granted on September 20, 2017 that vested on November 22, 2021 upon Providence VII U.S. Holdings L.P. receiving cumulative cash proceeds in respect of its investment in the Issuer equal to two times its aggregate cash investment in the Issuer.

F1 · ownership.nature: Represents shares and options held by The McLaughlin Family Trust for which Mr. McLaughlin is a trustee.

SEC source: 0001209191-21-067582 · doc4.xml · nonDerivative · entry 6

McLaughlin Matthew F. · CIK 0001853874 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 750,756

F5 · kind: Represents shares disposed to pay the exercise price and satisfy tax obligations in connection with the exercise of 241,412 options on December 1, 2021.

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $30.53 to $31.19, inclusive. The reporting person undertakes to provide to the Issuer, any security holder 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 above.

F1 · ownership.nature: Represents shares and options held by The McLaughlin Family Trust for which Mr. McLaughlin is a trustee.

SEC source: 0001209191-21-067582 · doc4.xml · nonDerivative · entry 5

McLaughlin Matthew F. · CIK 0001853874 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 823,098

F5 · kind: Represents shares disposed to pay the exercise price and satisfy tax obligations in connection with the exercise of 241,412 options on December 1, 2021.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $29.52 to $30.51, inclusive. The reporting person undertakes to provide to the Issuer, any security holder 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 above.

F1 · ownership.nature: Represents shares and options held by The McLaughlin Family Trust for which Mr. McLaughlin is a trustee.

SEC source: 0001209191-21-067582 · doc4.xml · nonDerivative · entry 4

McLaughlin Matthew F. · CIK 0001853874 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 895,603

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 · ownership.nature: Represents shares and options held by The McLaughlin Family Trust for which Mr. McLaughlin is a trustee.

SEC source: 0001209191-21-067582 · doc4.xml · derivative · entry 7

McLaughlin Matthew F. · CIK 0001853874 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 241,412

Underlying: Common Stock · 360,000 shares

Expires 2027-09-20

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.

F8 · shares: Represents non-qualified stock options granted on September 20, 2017 that vested on November 22, 2021 upon Providence VII U.S. Holdings L.P. receiving cumulative cash proceeds in respect of its investment in the Issuer equal to two times its aggregate cash investment in the Issuer.

F1 · ownership.nature: Represents shares and options held by The McLaughlin Family Trust for which Mr. McLaughlin is a trustee.

SEC source: 0001209191-21-067582 · doc4.xml · nonDerivative · entry 3

McLaughlin Matthew F. · CIK 0001853874 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 654,191

F2 · kind: Represents shares disposed to pay the exercise price and satisfy tax obligations in connection with the exercise of 360,000 options on November 30, 2021.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $31.35 to $31.97, inclusive. The reporting person undertakes to provide to the Issuer, any security holder 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 above.

F1 · ownership.nature: Represents shares and options held by The McLaughlin Family Trust for which Mr. McLaughlin is a trustee.

SEC source: 0001209191-21-067582 · doc4.xml · nonDerivative · entry 2

McLaughlin Matthew F. · CIK 0001853874 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 687,482

F2 · kind: Represents shares disposed to pay the exercise price and satisfy tax obligations in connection with the exercise of 360,000 options on November 30, 2021.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $30.35 to $31.34, inclusive. The reporting person undertakes to provide to the Issuer, any security holder 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 above.

F1 · ownership.nature: Represents shares and options held by The McLaughlin Family Trust for which Mr. McLaughlin is a trustee.

SEC source: 0001209191-21-067582 · doc4.xml · nonDerivative · entry 1

McLaughlin Matthew F. · CIK 0001853874 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 870,191

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 · ownership.nature: Represents shares and options held by The McLaughlin Family Trust for which Mr. McLaughlin is a trustee.

SEC source: 0001209191-21-069520 · doc4.xml · nonDerivative · entry 1

Grimmig Andrew E · CIK 0001854079 · Chief Legal Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,411

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.

SEC source: 0001209191-21-066821 · doc4.xml · nonDerivative · entry 2

Providence VII U.S. Holdings L.P. · CIK 0001854132 · 10% owner

Providence Equity GP VII-A L.P. · CIK 0001857469 · 10% owner

Providence Public Master L.P. · CIK 0001857463 · 10% owner

Providence Butternut Co-Investment L.P. · CIK 0001831271 · 10% owner

NELSON JONATHAN M · CIK 0001035233 · 10% owner

Phillips J. David · CIK 0001476657 · 10% owner

Tabet Karim A · CIK 0001857194 · 10% owner

Tisdale Andrew A · CIK 0001857411 · 10% owner

Dominguez Michael J · CIK 0001320307 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Providence Butternut Co-Investment L.P.

Disclosed balance after: 522,867

F5 · shares: The securities reported represent shares of common stock of the Issuer sold by Providence Butternut Co-Investment L.P. ("Providence Butternut") in a registered secondary transaction at a net price per share of $30.078125 after deducting underwriting discounts and commissions.

F5 · price: The securities reported represent shares of common stock of the Issuer sold by Providence Butternut Co-Investment L.P. ("Providence Butternut") in a registered secondary transaction at a net price per share of $30.078125 after deducting underwriting discounts and commissions.

F4 · ownership.nature: R. Davis Noell has separately filed a Form 4.

F6 · ownership.nature: The securities reported are held directly by Providence Butternut and may be deemed to be beneficially owned by Providence GP because Providence GP is the general partner of Providence Butternut. Jonathan M. Nelson, R. Davis Noell, J. David Phillips, Karim A. Tabet, Andrew A. Tisdale and Michael J. Dominguez control Holdco, which is the general partner of Providence Fund Holdco (International) L.P. Providence Fund Holdco (International) L.P. is the general partner of PEP VII-A International Ltd., which is the general partner of Providence GP.

F7 · ownership.nature: Jonathan M. Nelson, R. Davis Noell, J. David Phillips, Karim A. Tabet, Andrew A. Tisdale and Michael J. Dominguez may be deemed to exercise voting and investment power over, and thus may be deemed to beneficially own, the securities held by Providence Butternut due to their relationships with Holdco. Each of Providence GP, Jonathan M. Nelson, R. Davis Noell, J. David Phillips, Karim A. Tabet, Andrew A. Tisdale and Michael J. Dominguez hereby disclaims beneficial ownership of the shares held by Providence Butternut, except to the extent of its or his pecuniary interest therein, and this form shall not be construed as an admission that any such reporting person is the beneficial owner of any of the securities reported on this form.

SEC source: 0001209191-21-066821 · doc4.xml · nonDerivative · entry 1

Providence VII U.S. Holdings L.P. · CIK 0001854132 · 10% owner

Providence Equity GP VII-A L.P. · CIK 0001857469 · 10% owner

Providence Public Master L.P. · CIK 0001857463 · 10% owner

Providence Butternut Co-Investment L.P. · CIK 0001831271 · 10% owner

NELSON JONATHAN M · CIK 0001035233 · 10% owner

Phillips J. David · CIK 0001476657 · 10% owner

Tabet Karim A · CIK 0001857194 · 10% owner

Tisdale Andrew A · CIK 0001857411 · 10% owner

Dominguez Michael J · CIK 0001320307 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 81,126,217

F1 · shares: The securities reported represent shares of common stock of DoubleVerify Holdings, Inc. (the "Issuer") sold by Providence VII U.S. Holdings L.P. ("Providence VII") in a registered secondary transaction at a net price per share of $30.078125 after deducting underwriting discounts and commissions.

F1 · price: The securities reported represent shares of common stock of DoubleVerify Holdings, Inc. (the "Issuer") sold by Providence VII U.S. Holdings L.P. ("Providence VII") in a registered secondary transaction at a net price per share of $30.078125 after deducting underwriting discounts and commissions.

F2 · ownership.direct: The securities reported are held directly by Providence VII and may be deemed to be beneficially owned by Providence Equity GP VII-A L.P. ("Providence GP") because Providence GP is the general partner of Providence VII. Jonathan M. Nelson, R. Davis Noell, J. David Phillips, Karim A. Tabet, Andrew A. Tisdale and Michael J. Dominguez control Providence Holdco (International) GP Ltd. ("Holdco"), which is the general partner of Providence Fund Holdco (International) L.P. Providence Fund Holdco (International) L.P. is the general partner of PEP VII-A International Ltd., which is the general partner of Providence GP.

F3 · ownership.direct: Jonathan M. Nelson, R. Davis Noell, J. David Phillips, Karim A. Tabet, Andrew A. Tisdale and Michael J. Dominguez may be deemed to exercise voting and investment power over, and thus may be deemed to beneficially own, the securities held by Providence VII due to their relationships with Holdco. Each of Providence GP, Jonathan M. Nelson, R. Davis Noell, J. David Phillips, Karim A. Tabet, Andrew A. Tisdale and Michael J. Dominguez hereby disclaims beneficial ownership of the shares held by Providence VII, except to the extent of its or his pecuniary interest therein, and this form shall not be construed as an admission that any such reporting person is the beneficial owner of any of the securities reported on this form.

F4 · ownership.direct: R. Davis Noell has separately filed a Form 4.

SEC source: 0001209191-21-066819 · doc4.xml · derivative · entry 1

McLaughlin Matthew F. · CIK 0001853874 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 601,412

Underlying: Common Stock · 601,412 shares

Expires 2027-09-20

F1 · shares: Represents non-qualified stock options granted on September 20, 2017 that vested on November 22, 2021 upon Providence VII U.S. Holdings L.P. receiving cumulative cash proceeds in respect of its investment in DoubleVerify Holdings, Inc. (the "Company") equal to two times its aggregate cash investment in the Company.

F2 · ownership.nature: Represents options held by The McLaughlin Family Trust for which Mr. McLaughlin is a trustee.

SEC source: 0001209191-21-066816 · doc4.xml · derivative · entry 1

Allais Nicola T · CIK 0001854086 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 801,883

Underlying: Common Stock · 801,883 shares

Expires 2028-01-04

F1 · shares: Represents non-qualified stock options granted on January 4, 2018 that vested on November 22, 2021 upon Providence VII U.S. Holdings L.P. receiving cumulative cash proceeds in respect of its investment in DoubleVerify Holdings, Inc. (the "Company") equal to two times its aggregate cash investment in the Company.

SEC source: 0001209191-21-066818 · doc4.xml · derivative · entry 1

Grimmig Andrew E · CIK 0001854079 · Chief Legal Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 441,173

Underlying: Common Stock · 441,173 shares

Expires 2030-04-27

F1 · shares: Represents non-qualified stock options granted on April 27, 2020 that vested on November 22, 2021 upon Providence VII U.S. Holdings L.P. receiving cumulative cash proceeds in respect of its investment in DoubleVerify Holdings, Inc. (the "Company") equal to two times its aggregate cash investment in the Company.

SEC source: 0001209191-21-066820 · doc4.xml · nonDerivative · entry 2

Noell Robert Davis · CIK 0001472786 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Providence Butternut Co-Investment L.P.

Disclosed balance after: 522,867

F5 · shares: The securities reported represent shares of common stock of the Issuer sold by Providence Butternut Co-Investment L.P. ("Providence Butternut") in a registered secondary transaction at a net price per share of $30.078125 after deducting underwriting discounts and commissions.

F5 · price: The securities reported represent shares of common stock of the Issuer sold by Providence Butternut Co-Investment L.P. ("Providence Butternut") in a registered secondary transaction at a net price per share of $30.078125 after deducting underwriting discounts and commissions.

F4 · ownership.nature: The record and other beneficial owners of the reported securities have separately filed Form 4s.

F6 · ownership.nature: The securities reported are held directly by Providence Butternut and may be deemed to be beneficially owned by Providence GP because Providence GP is the general partner of Providence Butternut. Jonathan M. Nelson, R. Davis Noell, J. David Phillips, Karim A. Tabet, Andrew A. Tisdale and Michael J. Dominguez control Holdco, which is the general partner of Providence Fund Holdco (International) L.P. Providence Fund Holdco (International) L.P. is the general partner of PEP VII-A International Ltd., which is the general partner of Providence GP.

F7 · ownership.nature: Jonathan M. Nelson, R. Davis Noell, J. David Phillips, Karim A. Tabet, Andrew A. Tisdale and Michael J. Dominguez may be deemed to exercise voting and investment power over, and thus may be deemed to beneficially own, the securities held by Providence Butternut due to their relationships with Holdco. R. Davis Noell hereby disclaims beneficial ownership of the shares held by Providence Butternut, except to the extent of his pecuniary interest therein, and this form shall not be construed as an admission that R. Davis Noell is the beneficial owner of any of the securities reported on this form.

SEC source: 0001209191-21-066820 · doc4.xml · nonDerivative · entry 1

Noell Robert Davis · CIK 0001472786 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 81,126,217

F1 · shares: The securities reported represent shares of common stock of DoubleVerify Holdings, Inc. (the "Issuer") sold by Providence VII U.S. Holdings L.P. ("Providence VII") in a registered secondary transaction at a net price per share of $30.078125 after deducting underwriting discounts and commissions.

F1 · price: The securities reported represent shares of common stock of DoubleVerify Holdings, Inc. (the "Issuer") sold by Providence VII U.S. Holdings L.P. ("Providence VII") in a registered secondary transaction at a net price per share of $30.078125 after deducting underwriting discounts and commissions.

F2 · ownership.nature: The securities reported are held directly by Providence VII and may be deemed to be beneficially owned by Providence Equity GP VII-A L.P. ("Providence GP") because Providence GP is the general partner of Providence VII. Jonathan M. Nelson, R. Davis Noell, J. David Phillips, Karim A. Tabet, Andrew A. Tisdale and Michael J. Dominguez control Providence Holdco (International) GP Ltd. ("Holdco"), which is the general partner of Providence Fund Holdco (International) L.P. Providence Fund Holdco (International) L.P. is the general partner of PEP VII-A International Ltd., which is the general partner of Providence GP.

F3 · ownership.nature: Jonathan M. Nelson, R. Davis Noell, J. David Phillips, Karim A. Tabet, Andrew A. Tisdale and Michael J. Dominguez may be deemed to exercise voting and investment power over, and thus may be deemed to beneficially own, the securities held by Providence VII due to their relationships with Holdco. R. Davis Noell hereby disclaims beneficial ownership of the shares held by Providence VII, except to the extent of his pecuniary interest therein, and this form shall not be construed as an admission that R. Davis Noell is the beneficial owner of any of the securities reported on this form.

F4 · ownership.nature: The record and other beneficial owners of the reported securities have separately filed Form 4s.

SEC source: 0001209191-21-066817 · doc4.xml · derivative · entry 2

Desmond Laura · CIK 0001550028 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 721,694

Underlying: Common Stock · 721,694 shares

Expires 2027-09-20

F3 · shares: Represents non-qualified stock options granted on September 20, 2017 that vested on November 22, 2021 upon Providence VII U.S. Holdings L.P. receiving cumulative cash proceeds in respect of its investment in the Company equal to two times its aggregate cash investment in the Company.

F2 · ownership.nature: Represents shares and options held by the Laura B. Desmond Revocable Trust for which Ms. Desmond is trustee.

SEC source: 0001209191-21-066817 · doc4.xml · nonDerivative · entry 1

Desmond Laura · CIK 0001550028 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 147,053

F1 · shares: The securities reported represent shares of common stock of DoubleVerify Holdings, Inc. (the "Company") sold by the Reporting Person in a registered secondary transaction at a net price per share of $30.078125 after deducting underwriting discounts and commissions.

F1 · price: The securities reported represent shares of common stock of DoubleVerify Holdings, Inc. (the "Company") sold by the Reporting Person in a registered secondary transaction at a net price per share of $30.078125 after deducting underwriting discounts and commissions.

F2 · ownership.nature: Represents shares and options held by the Laura B. Desmond Revocable Trust for which Ms. Desmond is trustee.

SEC source: 0001209191-21-066086 · doc4.xml · derivative · entry 9

McLaughlin Matthew F. · CIK 0001853874 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 0

Underlying: Common Stock · 502,825 shares

Expires 2027-09-20

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.

F9 · derivative.exercise_date: Represents non-qualified stock options granted on September 20, 2017, 25% of which vested on September 20, 2018 and the remainder of which vested at a rate of 6.25% per quarter thereafter, subject to Mr. McLaughlin's continued employment. The options fully vested on September 20, 2021.

F1 · ownership.nature: Represents shares and options held by The McLaughlin Family Trust for which Mr. McLaughlin is a trustee.

SEC source: 0001209191-21-066086 · doc4.xml · nonDerivative · entry 7

McLaughlin Matthew F. · CIK 0001853874 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 510,191

F6 · kind: Represents shares disposed to pay the exercise price and satisfy tax obligations in connection with the exercise of 502,825 options on November 19, 2021.

F8 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $32.40 to $33.20, inclusive. The reporting person undertakes to provide to the Issuer, any security holder 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 above.

F1 · ownership.nature: Represents shares and options held by The McLaughlin Family Trust for which Mr. McLaughlin is a trustee.

SEC source: 0001209191-21-066086 · doc4.xml · nonDerivative · entry 6

McLaughlin Matthew F. · CIK 0001853874 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 617,511

F6 · kind: Represents shares disposed to pay the exercise price and satisfy tax obligations in connection with the exercise of 502,825 options on November 19, 2021.

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $31.40 to $32.39, inclusive. The reporting person undertakes to provide to the Issuer, any security holder 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 above.

F1 · ownership.nature: Represents shares and options held by The McLaughlin Family Trust for which Mr. McLaughlin is a trustee.

SEC source: 0001209191-21-066086 · doc4.xml · nonDerivative · entry 5

McLaughlin Matthew F. · CIK 0001853874 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 811,886

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 · ownership.nature: Represents shares and options held by The McLaughlin Family Trust for which Mr. McLaughlin is a trustee.

SEC source: 0001209191-21-066086 · doc4.xml · derivative · entry 8

McLaughlin Matthew F. · CIK 0001853874 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 502,825

Underlying: Common Stock · 700,000 shares

Expires 2027-09-20

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.

F9 · derivative.exercise_date: Represents non-qualified stock options granted on September 20, 2017, 25% of which vested on September 20, 2018 and the remainder of which vested at a rate of 6.25% per quarter thereafter, subject to Mr. McLaughlin's continued employment. The options fully vested on September 20, 2021.

F10 · balance_after: The total was increased by one share due to an administrative calculation error due to rounding of the vested amount.

F1 · ownership.nature: Represents shares and options held by The McLaughlin Family Trust for which Mr. McLaughlin is a trustee.

SEC source: 0001209191-21-066086 · doc4.xml · nonDerivative · entry 4

McLaughlin Matthew F. · CIK 0001853874 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 309,061

F2 · kind: Represents shares disposed to pay the exercise price and satisfy tax obligations in connection with the exercise of 700,000 options on November 18, 2021.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $32.87 to $33.13, inclusive. The reporting person undertakes to provide to the Issuer, any security holder 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 above.

F1 · ownership.nature: Represents shares and options held by The McLaughlin Family Trust for which Mr. McLaughlin is a trustee.

SEC source: 0001209191-21-066086 · doc4.xml · nonDerivative · entry 3

McLaughlin Matthew F. · CIK 0001853874 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 344,257

F2 · kind: Represents shares disposed to pay the exercise price and satisfy tax obligations in connection with the exercise of 700,000 options on November 18, 2021.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $31.87 to $32.86, inclusive. The reporting person undertakes to provide to the Issuer, any security holder 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 above.

F1 · ownership.nature: Represents shares and options held by The McLaughlin Family Trust for which Mr. McLaughlin is a trustee.

SEC source: 0001209191-21-066086 · doc4.xml · nonDerivative · entry 2

McLaughlin Matthew F. · CIK 0001853874 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 403,262

F2 · kind: Represents shares disposed to pay the exercise price and satisfy tax obligations in connection with the exercise of 700,000 options on November 18, 2021.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $30.87 to $31.86, inclusive. The reporting person undertakes to provide to the Issuer, any security holder 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 above.

F1 · ownership.nature: Represents shares and options held by The McLaughlin Family Trust for which Mr. McLaughlin is a trustee.

SEC source: 0001209191-21-066086 · doc4.xml · nonDerivative · entry 1

McLaughlin Matthew F. · CIK 0001853874 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 700,001

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 · ownership.nature: Represents shares and options held by The McLaughlin Family Trust for which Mr. McLaughlin is a trustee.

SEC source: 0001209191-21-062995 · doc4.xml · nonDerivative · entry 2

Blumberg Capital II, L. P. · CIK 0001399934 · 10% owner

Blumberg David James · CIK 0001859497 · 10% owner

Blumberg Capital Management II, L.L.C. · CIK 0001858750 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 366,349

F1 · kind: Represents a pro rata, in-kind distribution, and not a purchase or sale of securities, by Blumberg Capital Management II, L.L.C. ("BCM II") to its members without additional consideration.

F3 · ownership.direct: Shares are held by David J. Blumberg

SEC source: 0001209191-21-062995 · doc4.xml · nonDerivative · entry 1

Blumberg Capital II, L. P. · CIK 0001399934 · 10% owner

Blumberg David James · CIK 0001859497 · 10% owner

Blumberg Capital Management II, L.L.C. · CIK 0001858750 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 0

F1 · kind: Represents a pro rata, in-kind distribution, and not a purchase or sale of securities, by Blumberg Capital Management II, L.L.C. ("BCM II") to its members without additional consideration.

F2 · ownership.nature: Shares are held by BCM II. David J. Blumberg is the managing member of BCM II and has voting and investment power over the shares held by BCM II. Mr. Blumberg disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein.

SEC source: 0001209191-21-062269 · doc4.xml · nonDerivative · entry 2

Blumberg Capital II, L. P. · CIK 0001399934 · 10% owner

Blumberg Capital Management II, L.L.C. · CIK 0001858750 · 10% owner

Blumberg David James · CIK 0001859497 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 697,623

F1 · kind: Represents a pro rata, in-kind distribution, and not a purchase or sale of securities, by Blumberg Capital II, L.P. ("BC II") to its general partner and limited partners without additional consideration.

F3 · ownership.nature: Shares are held by BCM II. David J. Blumberg is the managing member of BCM II and has voting and investment power over the shares held by BCM II. Mr. Blumberg disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein.

SEC source: 0001209191-21-062269 · doc4.xml · nonDerivative · entry 1

Blumberg Capital II, L. P. · CIK 0001399934 · 10% owner

Blumberg Capital Management II, L.L.C. · CIK 0001858750 · 10% owner

Blumberg David James · CIK 0001859497 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 16,666,665

F1 · kind: Represents a pro rata, in-kind distribution, and not a purchase or sale of securities, by Blumberg Capital II, L.P. ("BC II") to its general partner and limited partners without additional consideration.

F2 · ownership.nature: Shares are held by BC II. Blumberg Capital Management II, L.L.C. ("BCM II") is the sole general partner of BC II. David J. Blumberg is the managing member of BCM II. BCM II and Mr. Blumberg have voting and investment power over the shares held by BC II. Each of BCM II and Mr. Blumberg disclaims beneficial ownership of these shares except to the extent of its or his respective pecuniary interest therein.