RGEN

SEC source: 0000899243-19-005883 · doc4.xml · derivative · entry 3

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,042

Underlying: Common Stock · 4,042 shares

Expires 2029-02-28

F3 · derivative.exercise_date: One third of the stock options will vest and become exercisable annually on February 28, 2020, February 28, 2021 and February 28, 2022.

SEC source: 0000899243-19-005883 · doc4.xml · nonDerivative · entry 2

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,343

F2 · kind: Sale of 185 shares in the open market to cover tax liability resulting from the release of restricted stock units.

SEC source: 0000899243-19-005883 · doc4.xml · nonDerivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,528

F1 · shares: Mr. Kuriyel was awarded 4,234 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 installments over a three-year period beginning on the first anniversary of the grant date. The restricted stock units may be settled only be 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: 0000899243-19-016508 · doc4a.xml · derivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,061

Underlying: Common Stock · 4,061 shares

Expires 2029-02-28

F1 · derivative.exercise_date: One third of the stock options will vest and become exercisable annually on February 28, 2020, February 28, 2021 and February 28, 2022.

SEC source: 0000899243-19-016513 · doc4a.xml · derivative · entry 1

Snodgres Jon · CIK 0001613498 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,681

Underlying: Common Stock · 5,681 shares

Expires 2029-02-28

F1 · derivative.exercise_date: One third of the stock options will vest and become exercisable annually on February 28, 2020, February 28, 2021 and February 28, 2022.

SEC source: 0000899243-19-016500 · doc4a.xml · derivative · entry 1

Hunt Anthony · CIK 0001606030 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,756

Underlying: Common Stock · 21,756 shares

Expires 2019-02-28

F1 · derivative.exercise_date: One third of the stock options will vest and become exercisable annually on February 28, 2020, February 28, 2021 and February 28, 2022

SEC source: 0000899243-18-031479 · doc4.xml · nonDerivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 12,294

F1 · shares: Sale of 311 shares in the open market valued at a price of $54.44 per share on December 18,2018 to cover tax liability resulting from the release of restricted stock units.

SEC source: 0000899243-18-029744 · doc4.xml · derivative · entry 9

Snodgres Jon · CIK 0001613498 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,127

Underlying: Common Stock · 10,253 shares

Expires 2026-02-26

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.

F6 · derivative.exercise_date: Shares vest and become exercisable as follows: 5,126 shares on 2/26/2017, 5,127 shares on 2/26/2018 and 5,127 shares on 2/26/2019.

SEC source: 0000899243-18-029744 · doc4.xml · derivative · entry 8

Snodgres Jon · CIK 0001613498 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 12,110

Underlying: Common Stock · 6,055 shares

Expires 2027-02-23

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_date: 6,055 shares vest and become exercisable on each of the following dates: 2/23/2018, 2/23/2019 and 2/23/2020.

SEC source: 0000899243-18-029744 · doc4.xml · derivative · entry 7

Snodgres Jon · CIK 0001613498 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,000

Underlying: Common Stock · 4,000 shares

Expires 2024-07-14

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

F4 · derivative.exercise_date: 2,000 shares vest and become exercisable on each of the following dates: 7/14/2015, 7/14/2016, 7/14/2017, 7/14/2018 and 7/14/2019.

SEC source: 0000899243-18-029744 · doc4.xml · derivative · entry 6

Snodgres Jon · CIK 0001613498 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 11,445 shares

Expires 2025-02-26

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

F3 · derivative.exercise_date: This option is currently exercisable.

SEC source: 0000899243-18-029744 · doc4.xml · nonDerivative · entry 5

Snodgres Jon · CIK 0001613498 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 20,899

F1 · shares: Sale of common stock was effective pursuant to a 10(b)5-1 trading plan adopted on September 19, 2018.

F2 · price: $63.4874 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $63.18 to $64.71, 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: 0000899243-18-029744 · doc4.xml · nonDerivative · entry 4

Snodgres Jon · CIK 0001613498 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 52,652

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: 0000899243-18-029744 · doc4.xml · nonDerivative · entry 3

Snodgres Jon · CIK 0001613498 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 42,399

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: 0000899243-18-029744 · doc4.xml · nonDerivative · entry 2

Snodgres Jon · CIK 0001613498 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 36,344

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: 0000899243-18-029744 · doc4.xml · nonDerivative · entry 1

Snodgres Jon · CIK 0001613498 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 32,344

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: 0000899243-18-028342 · doc4.xml · nonDerivative · entry 1

RYAN THOMAS F JR · CIK 0001263366 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,225

SEC source: 0000899243-18-024274 · doc4.xml · derivative · entry 3

Hunt Anthony · CIK 0001606030 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 38,127

Underlying: Common Stock · 11,873 shares

Expires 2024-05-05

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

F3 · derivative.exercise_date: 10,000 shares vest and become exercisable on each of the following dates: 5/05/2015, 5/05/2016, 5/05/2017, 5/05/2018 and 5/05/2019.

SEC source: 0000899243-18-024274 · doc4.xml · nonDerivative · entry 2

Hunt Anthony · CIK 0001606030 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 227,451

F1 · shares: Sale of common stock was effected pursuant to a 10(b)5-1 trading plan adopted on November 17, 2017.

F2 · price: $57.7091 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $57.18 to $58.10, 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: 0000899243-18-024274 · doc4.xml · nonDerivative · entry 1

Hunt Anthony · CIK 0001606030 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 255,017

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: 0000899243-18-023645 · doc4.xml · derivative · entry 5

BARTHELEMY NICOLAS · CIK 0001283576 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,992 shares

Expires 2025-05-21

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.

F2 · derivative.exercise_date: This option is currently exercisable.

SEC source: 0000899243-18-023645 · doc4.xml · derivative · entry 4

BARTHELEMY NICOLAS · CIK 0001283576 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 2,434 shares

Expires 2027-05-18

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.

F2 · derivative.exercise_date: This option is currently exercisable.

SEC source: 0000899243-18-023645 · doc4.xml · nonDerivative · entry 3

BARTHELEMY NICOLAS · CIK 0001283576 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,186

F1 · price: $54.4371 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $54.39 to $54.50, 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: 0000899243-18-023645 · doc4.xml · nonDerivative · entry 2

BARTHELEMY NICOLAS · CIK 0001283576 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,766

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: 0000899243-18-023645 · doc4.xml · nonDerivative · entry 1

BARTHELEMY NICOLAS · CIK 0001283576 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,774

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: 0000899243-18-023467 · doc4.xml · nonDerivative · entry 1

Snodgres Jon · CIK 0001613498 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 20,899

F1 · price: $52.7911 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $52.545 to $52.88, 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.

SEC source: 0000899243-18-023221 · doc4.xml · nonDerivative · entry 1

RYAN THOMAS F JR · CIK 0001263366 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,988

F1 · price: $51.4361 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $51.39 to $51.501, 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: 0001250853-18-000113 · primary_doc.xml · nonDerivative · entry 2

EDDLEMAN ROY T · CIK 0001270264 · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · As trustee

Disclosed balance after: 370,000

F3 · price: The price is a weighted-average price. The shares were sold in multiple transactions at prices ranging from $49.4328 to $49.5959, inclusive.

F4 · ownership.nature: The shares shown are held, of record, by a second charitable remainder unitrust of which the reporting person is the sole trustee and, as such, has investment and voting control over such shares, and is a lifetime beneficiary. The reporting person disclaims as beneficial ownership of the shares except to the extent of his pecuniary interest therein.

SEC source: 0001250853-18-000113 · primary_doc.xml · nonDerivative · entry 1

EDDLEMAN ROY T · CIK 0001270264 · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · As trustee

Disclosed balance after: 720,000

F1 · price: The price is a weighted-average price. The shares were sold in multiple transactions at prices ranging from $49.6450 to $49.6950, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each price with the price ranges set forth in this footnote and in footnote (3), below.

F2 · ownership.nature: The shares shown are held, of record, by a charitable remainder unitrust of which the reporting person is the sole trustee and, as such, has investment and voting control over such shares, and is a lifetime beneficiary. The reporting person disclaims as beneficial ownership of the shares except to the extent of his pecuniary interest therein.

SEC source: 0001250853-18-000112 · primary_doc.xml · nonDerivative · entry 3

EDDLEMAN ROY T · CIK 0001270264 · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · As trustee

Disclosed balance after: 409,215

F4 · ownership.nature: The shares shown are held, of record, by a second charitable remainder unitrust of which the reporting person is the sole trustee and, as such, has investment and voting control over such shares, and is a lifetime beneficiary. The reporting person disclaims as beneficial ownership of the shares except to the extent of his pecuniary interest therein.

SEC source: 0001250853-18-000112 · primary_doc.xml · nonDerivative · entry 2

EDDLEMAN ROY T · CIK 0001270264 · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 413,985

F3 · price: The price is a weighted-average price. The shares were sold in multiple transactions at prices ranging from $49.0500 to $49.0908, inclusive.

SEC source: 0001250853-18-000112 · primary_doc.xml · nonDerivative · entry 1

EDDLEMAN ROY T · CIK 0001270264 · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · As trustee

Disclosed balance after: 796,858

F1 · price: The price is a weighted-average price. The shares were sold in multiple transactions at prices ranging from $49.207 to $49.1358, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each price with the price ranges set forth in this footnote and in footnote (3), below.

F2 · ownership.nature: The shares shown are held, of record, by a charitable remainder unitrust of which the reporting person is the sole trustee and, as such, has investment and voting control over such shares, and is a lifetime beneficiary. The reporting person disclaims as beneficial ownership of the shares except to the extent of his pecuniary interest therein.

SEC source: 0001250853-18-000107 · primary_doc.xml · derivative · entry 2

EDDLEMAN ROY T · CIK 0001270264 · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · As trustee

Disclosed balance after: 1

Underlying: Common Stock · 250,000 shares

Expires 2019-07-26

F1 · security: The reporting person entered into a so-called zero-cost collar arrangement pursuant to which he wrote a covered call option and purchased a put option. Only one of the options can be "in the money" on the expiration date, at which time the in-the-money option will be exercised (or settled in cash), and the other option will expire. If neither option is in the money on the expiration date, both will expire.

F2 · ownership.nature: The securities shown are held of record by the Roy T. Eddleman Living Trust UAD 8-7-2000, of which the reporting person is the sole trustee and, as such, has investment and voting control over such securities.

SEC source: 0001250853-18-000107 · primary_doc.xml · derivative · entry 1

EDDLEMAN ROY T · CIK 0001270264 · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · As trustee

Disclosed balance after: 1

Underlying: Common Stock · 250,000 shares

Expires 2019-07-26

F1 · security: The reporting person entered into a so-called zero-cost collar arrangement pursuant to which he wrote a covered call option and purchased a put option. Only one of the options can be "in the money" on the expiration date, at which time the in-the-money option will be exercised (or settled in cash), and the other option will expire. If neither option is in the money on the expiration date, both will expire.

F2 · ownership.nature: The securities shown are held of record by the Roy T. Eddleman Living Trust UAD 8-7-2000, of which the reporting person is the sole trustee and, as such, has investment and voting control over such securities.

SEC source: 0001140361-18-032952 · doc1.xml · nonDerivative · entry 1

Snodgres Jon · CIK 0001613498 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 35,359

F1 · shares: Payment of tax liability made via forfeiture of 295 shares of Common Stock valued at a price of $47.911 per share on July 18, 2018.

SEC source: 0001250853-18-000099 · primary_doc.xml · derivative · entry 2

EDDLEMAN ROY T · CIK 0001270264 · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · As trustee

Disclosed balance after: 1

Underlying: Common Stock · 250,000 shares

Expires 2020-01-13

F1 · security: The reporting person entered into a so-called zero-cost collar arrangement pursuant to which he wrote a covered call option and purchased a put option. Only one of the options can be "in the money" on the expiration date, at which time the in-the-money option will be exercised (and settled in cash) and the other option will expire. If neither option is in the money on the expiration date, both will expire.

F2 · ownership.nature: The securities shown are held of record by the Roy T. Eddleman Living Trust UAD 8-7-2000, of which the reporting person is the sole trustee, and as such, has investment and voting control over such securities.

SEC source: 0001250853-18-000099 · primary_doc.xml · derivative · entry 1

EDDLEMAN ROY T · CIK 0001270264 · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · As trustee

Disclosed balance after: 1

Underlying: Common Stock · 250,000 shares

Expires 2020-01-13

F1 · shares: The reporting person entered into a so-called zero-cost collar arrangement pursuant to which he wrote a covered call option and purchased a put option. Only one of the options can be "in the money" on the expiration date, at which time the in-the-money option will be exercised (and settled in cash) and the other option will expire. If neither option is in the money on the expiration date, both will expire.

F2 · ownership.nature: The securities shown are held of record by the Roy T. Eddleman Living Trust UAD 8-7-2000, of which the reporting person is the sole trustee, and as such, has investment and voting control over such securities.

SEC source: 0001250853-18-000088 · primary_doc.xml · nonDerivative · entry 1

EDDLEMAN ROY T · CIK 0001270264 · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · As trustee

Disclosed balance after: 2,903,446

F1 · ownership.nature: The shares shown are held of record by the Roy T. Eddleman Living Trust UAD 8-7-2000, of which the reporting person is the sole trustee, and as such, has investment and voting control over such shares.

SEC source: 0001140361-18-027688 · doc1.xml · nonDerivative · entry 1

RYAN THOMAS F JR · CIK 0001263366 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,354

SEC source: 0001140361-18-025220 · doc1.xml · nonDerivative · entry 1

Hunt Anthony · CIK 0001606030 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 243,144

F1 · shares: Sale of common stock was effected pursuant to a 10(b)5-1 trading plan adopted on November 17, 2017.

F2 · price: $42.5267 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $42.37 to $42.77, 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: 0001140361-18-024451 · doc1.xml · derivative · entry 3

RYAN THOMAS F JR · CIK 0001263366 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,304

Underlying: Common Stock · 3,304 shares

Expires 2028-05-16

F2 · derivative.exercise_date: Award vests in full one year from grant date on May 16, 2019.

SEC source: 0001140361-18-024451 · doc1.xml · nonDerivative · entry 2

RYAN THOMAS F JR · CIK 0001263366 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,286

F1 · shares: Mr. Ryan was awarded 1,486 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 May 16, 2019. 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: 0001140361-18-024450 · doc1.xml · derivative · entry 2

MUIR GLENN P · CIK 0001181190 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,304

Underlying: Common Stock · 3,304 shares

Expires 2028-05-16

F2 · derivative.exercise_date: Award vests in full one year from grant date on May 16, 2019.

SEC source: 0001140361-18-024450 · doc1.xml · nonDerivative · entry 1

MUIR GLENN P · CIK 0001181190 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,455

F1 · shares: Mr. Muir was awarded 1,486 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 May 16, 2019. 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: 0001140361-18-024449 · doc1.xml · derivative · entry 2

DAWES KAREN A · CIK 0001261506 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,626

Underlying: Common Stock · 4,626 shares

Expires 2028-05-16

F2 · derivative.exercise_date: Award vests in full one year from grant date on May 16, 2019.

SEC source: 0001140361-18-024449 · doc1.xml · nonDerivative · entry 1

DAWES KAREN A · CIK 0001261506 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 97,037

F1 · shares: Ms. Dawes was awarded 2,080 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 May 16, 2019. 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: 0001140361-18-024448 · doc1.xml · derivative · entry 2

Cox John · CIK 0001498428 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,304

Underlying: Common Stock · 3,304 shares

Expires 2028-05-16

F2 · derivative.exercise_date: Award vests in full one year from grant date on May 16, 2019.

SEC source: 0001140361-18-024448 · doc1.xml · nonDerivative · entry 1

Cox John · CIK 0001498428 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,313

F1 · shares: Mr. Cox was awarded 1,486 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 May 16, 2019. 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: 0001140361-18-024447 · doc1.xml · derivative · entry 2

COOPER GLENN L MD · CIK 0001046351 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,304

Underlying: Common Stock · 3,304 shares

Expires 2028-05-16

F2 · derivative.exercise_date: Award vests in full one year from grant date on May 16, 2019.

SEC source: 0001140361-18-024447 · doc1.xml · nonDerivative · entry 1

COOPER GLENN L MD · CIK 0001046351 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 39,786

F1 · shares: Dr. Cooper was awarded 1,486 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 May 16, 2019. 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.