RGEN

SEC source: 0001193125-25-201224 · ownership.xml · nonDerivative · entry 2

Hunt Anthony · CIK 0001606030 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 129,758

F1 · kind: Sale of common stock was effected pursuant to a 10(b)5-1 trading plan adopted on December 9, 2024.

SEC source: 0001193125-25-201224 · ownership.xml · nonDerivative · entry 1

Hunt Anthony · CIK 0001606030 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 129,854

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.

SEC source: 0001193125-25-195655 · ownership.xml · nonDerivative · entry 1

Loeillot Olivier · CIK 0001995525 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 44,187

F1 · shares: Represents the number of shares withheld by the Issuer to satisfy tax withholding obligations of the reporting person that arose upon the release of restricted stock units.

SEC source: 0000950170-25-112985 · ownership.xml · derivative · entry 2

Hughes Violetta · CIK 0001991429 · CHIEF ACCOUNTING OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,914

Underlying: Common Stock · 3,914 shares

Expires 2035-09-02

F2 · derivative.exercise_date: The shares vest in equal annual instalments over a five-year period with each such vesting date occurring on the anniversary of the grant date.

SEC source: 0000950170-25-112985 · ownership.xml · nonDerivative · entry 1

Hughes Violetta · CIK 0001991429 · CHIEF ACCOUNTING OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,142

F1 · shares: Ms. Hughes was awarded 4,142 restricted stock units. Each restricted stock unit represents a contingent right to receive one share of Repligen Corporation's Common Stock. The restricted stock units vest in equal annual instalments over a five-year period beginning on the first anniversary of the grant date. The restricted stock units may be settled only by delivering shares of Repligen Corporation's Common Stock, and thus, the grant is being reported in Table 1 as allowed per SEC guidance.

SEC source: 0000950170-25-107084 · ownership.xml · nonDerivative · entry 1

Madaus Martin D · CIK 0001310268 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Martin D. Madaus 2011 Revocable Trust

Disclosed balance after: 1,800

F1 · price: The price reported is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $111.72 to $112.35, 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 purchased at each separate price within the range.

SEC source: 0000950170-25-073387 · ownership.xml · nonDerivative · entry 5

Hunt Anthony · CIK 0001606030 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 109,854

F1 · kind: Sale of common stock was effected pursuant to a 10(b)5-1 trading plan adopted on December 9, 2024.

SEC source: 0000950170-25-073387 · ownership.xml · nonDerivative · entry 4

Hunt Anthony · CIK 0001606030 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 109,861

F1 · kind: Sale of common stock was effected pursuant to a 10(b)5-1 trading plan adopted on December 9, 2024.

F5 · price: $125.20 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $125.06 to $126.00, 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.

SEC source: 0000950170-25-073387 · ownership.xml · nonDerivative · entry 3

Hunt Anthony · CIK 0001606030 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 110,129

F1 · kind: Sale of common stock was effected pursuant to a 10(b)5-1 trading plan adopted on December 9, 2024.

F4 · price: $124.34 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $124.05 to $125.05, 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.

SEC source: 0000950170-25-073387 · ownership.xml · nonDerivative · entry 2

Hunt Anthony · CIK 0001606030 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 116,662

F1 · kind: Sale of common stock was effected pursuant to a 10(b)5-1 trading plan adopted on December 9, 2024.

F3 · price: $123.57 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $123.04 to $124.04, 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.

SEC source: 0000950170-25-073387 · ownership.xml · nonDerivative · entry 1

Hunt Anthony · CIK 0001606030 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 134,258

F1 · kind: Sale of common stock was effected pursuant to a 10(b)5-1 trading plan adopted on December 9, 2024.

F2 · price: $122.66 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $122.03 to $123.03, 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.

SEC source: 0000950170-25-074761 · ownership.xml · derivative · entry 2

Konstantinov Konstantin · CIK 0001774649 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,800

Underlying: Common Stock · 1,800 shares

Expires 2035-05-15

F2 · derivative.exercise_date: Award vests in full on the earlier of May 15, 2026, one year from grant date, or on the date of the next annual meeting of the Company's shareholders, which has not yet been determined.

SEC source: 0000950170-25-074761 · ownership.xml · nonDerivative · entry 1

Konstantinov Konstantin · CIK 0001774649 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,894

F1 · shares: Mr. Konstantinov was awarded 973 restricted stock units. Each restricted stock unit represents a contingent right to receive one share of Repligen Corporation's Common Stock. The restricted stock units vest on the earlier of May 15, 2026, one year from the grant date, or the date of the next annual meeting of the Company's shareholders, which has not yet been determined. The restricted stock units may be settled only by delivering shares of Repligen Corporation's Common Stock, and thus, the grant is being reported in Table 1 as allowed per SEC guidance.

SEC source: 0000950170-25-074752 · ownership.xml · derivative · entry 2

MUIR GLENN P · CIK 0001181190 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,800

Underlying: Common Stock · 1,800 shares

Expires 2035-05-15

F2 · derivative.exercise_date: Award vests in full on the earlier of May 15, 2026, one year from grant date, or on the date of the next annual meeting of the Company's shareholders, which has not yet been determined.

SEC source: 0000950170-25-074752 · ownership.xml · nonDerivative · entry 1

MUIR GLENN P · CIK 0001181190 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,256

F1 · shares: Mr. Muir was awarded 973 restricted stock units. Each restricted stock unit represents a contingent right to receive one share of Repligen Corporation's Common Stock. The restricted stock units vest on the earlier of May 15, 2026, one year from the grant date, or the date of the next annual meeting of the Company's shareholders, which has not yet been determined. The restricted stock units may be settled only by delivering shares of Repligen Corporation's Common Stock, and thus, the grant is being reported in Table 1 as allowed per SEC guidance.

SEC source: 0000950170-25-074747 · ownership.xml · derivative · entry 2

EGLINTON MANNER CARRIE · CIK 0001696776 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,800

Underlying: Common Stock · 1,800 shares

Expires 2035-05-15

F2 · derivative.exercise_date: Award vests in full on the earlier of May 15, 2026, one year from grant date, or on the date of the next annual meeting of the Company's shareholders, which has not yet been determined.

SEC source: 0000950170-25-074747 · ownership.xml · nonDerivative · entry 1

EGLINTON MANNER CARRIE · CIK 0001696776 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,466

F1 · shares: Ms. Manner was awarded 973 restricted stock units. Each restricted stock unit represents a contingent right to receive one share of Repligen Corporation's Common Stock. The restricted stock units vest on the earlier of May 15, 2026, one year from the grant date, or the date of the next annual meeting of the Company's shareholders, which has not yet been determined. The restricted stock units may be settled only by delivering shares of Repligen Corporation's Common Stock, and thus, the grant is being reported in Table 1 as allowed per SEC guidance.

SEC source: 0000950170-25-074251 · ownership.xml · derivative · entry 2

DAWES KAREN A · CIK 0001261506 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,800

Underlying: Common Stock · 1,800 shares

Expires 2035-05-15

F2 · derivative.exercise_date: Award vests in full on the earlier of May 15, 2026, one year from grant date, or on the date of the next annual meeting of the Company's shareholders, which has not yet been determined.

SEC source: 0000950170-25-074251 · ownership.xml · nonDerivative · entry 1

DAWES KAREN A · CIK 0001261506 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 92,096

F1 · shares: Ms. Dawes was awarded 973 restricted stock units. Each restricted stock unit represents a contingent right to receive one share of Repligen Corporation's Common Stock. The restricted stock units vest on the earlier of May 15, 2026, one year from the grant date, or the date of the next annual meeting of the Company's shareholders, which has not yet been determined. The restricted stock units may be settled only by delivering shares of Repligen Corporation's Common Stock, and thus, the grant is being reported in Table 1 as allowed per SEC guidance.

SEC source: 0000950170-25-074224 · ownership.xml · derivative · entry 3

Madaus Martin D · CIK 0001310268 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,800

Underlying: Common Stock · 1,800 shares

Expires 2035-05-15

F2 · derivative.exercise_date: Award vests in full on the earlier of May 15, 2026, one year from grant date, or on the date of the next annual meeting of the Company's shareholders, which has not yet been determined.

SEC source: 0000950170-25-074224 · ownership.xml · nonDerivative · entry 1

Madaus Martin D · CIK 0001310268 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,586

F1 · shares: Mr. Madaus was awarded 973 restricted stock units. Each restricted stock unit represents a contingent right to receive one share of Repligen Corporation's Common Stock. The restricted stock units vest on the earlier of May 15, 2026, one year from the grant date, or the date of the next annual meeting of the Company's shareholders, which has not yet been determined. The restricted stock units may be settled only by delivering shares of Repligen Corporation's Common Stock, and thus, the grant is being reported in Table 1 as allowed per SEC guidance.

SEC source: 0000950170-25-074216 · ownership.xml · derivative · entry 2

Pax Margaret · CIK 0001999772 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,800

Underlying: Common Stock · 1,800 shares

Expires 2035-05-15

F2 · derivative.exercise_date: Award vests in full on the earlier of May 15, 2026, one year from grant date, or on the date of the next annual meeting of the Company's shareholders, which has not yet been determined.

SEC source: 0000950170-25-074216 · ownership.xml · nonDerivative · entry 1

Pax Margaret · CIK 0001999772 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,016

F1 · shares: Ms. Pax was awarded 973 restricted stock units. Each restricted stock unit represents a contingent right to receive one share of Repligen Corporation's Common Stock. The restricted stock units vest on the earlier of May 15, 2026, one year from the grant date, or the date of the next annual meeting of the Company's shareholders, which has not yet been determined. The restricted stock units may be settled only by delivering shares of Repligen Corporation's Common Stock, and thus, the grant is being reported in Table 1 as allowed per SEC guidance.

SEC source: 0000950170-25-074196 · ownership.xml · derivative · entry 2

Mhatre Rohin · CIK 0001798735 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,800

Underlying: Common Stock · 1,800 shares

Expires 2035-05-15

F2 · derivative.exercise_date: Award vests in full on the earlier of May 15, 2026, one year from grant date, or on the date of the next annual meeting of the Company's shareholders, which has not yet been determined.

SEC source: 0000950170-25-074196 · ownership.xml · nonDerivative · entry 1

Mhatre Rohin · CIK 0001798735 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,019

F1 · shares: Mr. Mhatre was awarded 973 restricted stock units. Each restricted stock unit represents a contingent right to receive one share of Repligen Corporation's Common Stock. The restricted stock units vest on the earlier of May 15, 2026, one year from the grant date, or the date of the next annual meeting of the Company's shareholders, which has not yet been determined. The restricted stock units may be settled only by delivering shares of Repligen Corporation's Common Stock, and thus, the grant is being reported in Table 1 as allowed per SEC guidance.

SEC source: 0000950170-25-075705 · ownership.xml · derivative · entry 2

BARTHELEMY NICOLAS · CIK 0001283576 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,800

Underlying: Common Stock · 1,800 shares

Expires 2035-05-15

F2 · derivative.exercise_date: Award vests in full on the earlier of May 15, 2026, one year from grant date, or on the date of the next annual meeting of the Company's shareholders, which has not yet been determined.

SEC source: 0000950170-25-075705 · ownership.xml · nonDerivative · entry 1

BARTHELEMY NICOLAS · CIK 0001283576 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,441

F1 · shares: Mr. Barthelemy was awarded 973 restricted stock units. Each restricted stock unit represents a contingent right to receive one share of Repligen Corporation's Common Stock. The restricted stock units vest on the earlier of May 15, 2026, one year from the grant date, or the date of the next annual meeting of the Company's shareholders, which has not yet been determined. The restricted stock units may be settled only by delivering shares of Repligen Corporation's Common Stock, and thus, the grant is being reported in Table 1 as allowed per SEC guidance.

SEC source: 0000950170-25-048942 · ownership.xml · nonDerivative · entry 1

Bylund James · CIK 0001849642 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,711

F1 · shares: Represents the number of shares withheld by the Issuer to satisfy tax withholding obligations of the reporting person that arose upon the release of restricted stock units.

SEC source: 0000950170-25-041119 · ownership.xml · nonDerivative · entry 1

Pax Margaret · CIK 0001999772 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,043

SEC source: 0000950170-25-042026 · ownership.xml · derivative · entry 10

Hunt Anthony · CIK 0001606030 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 21,756 shares

Expires 2029-02-28

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 · derivative.exercise_date: This option is fully vested and exercisable.

SEC source: 0000950170-25-042026 · ownership.xml · derivative · entry 9

Hunt Anthony · CIK 0001606030 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 202,344

Underlying: Common Stock · 5,000 shares

Expires 2028-03-01

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.

F7 · derivative.exercise_date: 207,344 of the shares underlying this option have vested. The remaining shares vest as follows: 28,777 shares on March 1, 2026, and 28,778 shares on March 1, 2027.

SEC source: 0000950170-25-042026 · ownership.xml · nonDerivative · entry 8

Hunt Anthony · CIK 0001606030 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 136,301

F1 · kind: Sale of common stock was effected pursuant to a 10(b)5-1 trading plan adopted on December 9, 2024.

F6 · price: $153.70 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $153.55 to $153.82, 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.

SEC source: 0000950170-25-042026 · ownership.xml · nonDerivative · entry 7

Hunt Anthony · CIK 0001606030 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 138,584

F1 · kind: Sale of common stock was effected pursuant to a 10(b)5-1 trading plan adopted on December 9, 2024.

F5 · price: $152.82 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $152.39 to $153.36, 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

SEC source: 0000950170-25-042026 · ownership.xml · nonDerivative · entry 6

Hunt Anthony · CIK 0001606030 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 154,203

F1 · kind: Sale of common stock was effected pursuant to a 10(b)5-1 trading plan adopted on December 9, 2024.

F4 · price: $151.96 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $151.43 to $152.37, 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.

SEC source: 0000950170-25-042026 · ownership.xml · nonDerivative · entry 5

Hunt Anthony · CIK 0001606030 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 160,379

F1 · kind: Sale of common stock was effected pursuant to a 10(b)5-1 trading plan adopted on December 9, 2024.

F3 · price: $151.09 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $150.42 to $151.37, 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.

SEC source: 0000950170-25-042026 · ownership.xml · nonDerivative · entry 4

Hunt Anthony · CIK 0001606030 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 162,897

F1 · kind: Sale of common stock was effected pursuant to a 10(b)5-1 trading plan adopted on December 9, 2024.

SEC source: 0000950170-25-042026 · ownership.xml · nonDerivative · entry 3

Hunt Anthony · CIK 0001606030 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 162,997

F1 · kind: Sale of common stock was effected pursuant to a 10(b)5-1 trading plan adopted on December 9, 2024.

F2 · price: $148.05 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $148.01 to $148.10, 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.

SEC source: 0000950170-25-042026 · ownership.xml · nonDerivative · entry 2

Hunt Anthony · CIK 0001606030 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 163,057

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.

SEC source: 0000950170-25-042026 · ownership.xml · nonDerivative · entry 1

Hunt Anthony · CIK 0001606030 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 141,301

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.

SEC source: 0000950170-25-042471 · ownership.xml · nonDerivative · entry 2

Bylund James · CIK 0001849642 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,165

F2 · shares: Represents the number of shares withheld by the Issuer to satisfy tax withholding obligations of the reporting person that arose upon the release of the performance stock units.

SEC source: 0000950170-25-042471 · ownership.xml · nonDerivative · entry 1

Bylund James · CIK 0001849642 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,340

F1 · shares: Represents 63 shares issued pursuant to a Performance Stock Unit ("PSU") award granted to the Issuer on May 16, 2023, and 318 shares issued pursuant to a Performance Stock Unit ("PSU") award granted to the Issuer on December 12, 2023. The Compensation Committee authorized the issuance of the underlying shares based upon the Issuer's achievement of pre-established performance criteria set forth in the PSU award.

SEC source: 0000950170-25-031593 · ownership.xml · derivative · entry 2

Garland Jason K · CIK 0001754555 · CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,056

Underlying: Common Stock · 6,056 shares

Expires 2035-03-03

F2 · derivative.exercise_date: One third of the stock options will vest and become exercisable annually on March 3, 2026, March 3, 2027, and March 3, 2028.

SEC source: 0000950170-25-031593 · ownership.xml · nonDerivative · entry 1

Garland Jason K · CIK 0001754555 · CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,795

F1 · shares: Mr. Garland was awarded 6,435 restricted stock units. Each restricted stock unit represents a contingent right to receive one share of Repligen Corporation's Common Stock. The restricted stock units vest in equal annual instalments over a three-year period beginning on the first anniversary of the grant date. The restricted stock units may be settled only by delivering shares of Repligen Corporation's Common Stock, and thus, the grant is being reported in Table 1 as allowed per SEC guidance.

SEC source: 0000950170-25-031591 · ownership.xml · derivative · entry 3

KURIYEL RALF · CIK 0001733143 · Senior VP, R&D

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,542

Underlying: Common Stock · 4,542 shares

Expires 2035-03-03

F3 · derivative.exercise_date: One third of the stock options will vest and become exercisable annually on March 3, 2026, March 3, 2027, and March 3, 2028.

SEC source: 0000950170-25-031591 · ownership.xml · nonDerivative · entry 2

KURIYEL RALF · CIK 0001733143 · Senior VP, R&D

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,062

F2 · shares: Represents the number of shares withheld by the Issuer to satisfy tax withholding obligations of the reporting person that arose upon the release of restricted stock units.

SEC source: 0000950170-25-031591 · ownership.xml · nonDerivative · entry 1

KURIYEL RALF · CIK 0001733143 · Senior VP, R&D

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,448

F1 · shares: Mr. Kuriyel was awarded 4,826 restricted stock units. Each restricted stock unit represents a contingent right to receive one share of Repligen Corporation's Common Stock. The restricted stock units vest in equal annual instalments over a three-year period beginning on the first anniversary of the grant date. The restricted stock units may be settled only by delivering shares of Repligen Corporation's Common Stock, and thus, the grant is being reported in Table 1 as allowed per SEC guidance.

SEC source: 0000950170-25-031572 · ownership.xml · nonDerivative · entry 1

Hunt Anthony · CIK 0001606030 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 136,301

F1 · shares: Represents the number of shares withheld by the Issuer to satisfy tax withholding obligations of the reporting person that arose upon the release of restricted stock units.

SEC source: 0000950170-25-031569 · ownership.xml · derivative · entry 3

Bylund James · CIK 0001849642 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,056

Underlying: Common Stock · 6,056 shares

Expires 2035-03-03

F3 · derivative.exercise_date: One third of the stock options will vest and become exercisable annually on March 3, 2026, March 3, 2027, and March 3, 2028.

SEC source: 0000950170-25-031569 · ownership.xml · nonDerivative · entry 2

Bylund James · CIK 0001849642 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,959

F2 · shares: Represents the number of shares withheld by the Issuer to satisfy tax withholding obligations of the reporting person that arose upon the release of restricted stock units.

SEC source: 0000950170-25-031569 · ownership.xml · nonDerivative · entry 1

Bylund James · CIK 0001849642 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,198

F1 · shares: Mr. Bylund was awarded 6,435 restricted stock units. Each restricted stock unit represents a contingent right to receive one share of Repligen Corporation's Common Stock. The restricted stock units vest in equal annual instalments over a three-year period beginning on the first anniversary of the grant date. The restricted stock units may be settled only by delivering shares of Repligen Corporation's Common Stock, and thus, the grant is being reported in Table 1 as allowed per SEC guidance.