REPLIGEN CORP — Director's Dealing 2018

May 10, 2018

SEC Form 4/A — Form 4/A

Issuer: REPLIGEN CORP (RGEN)
CIK: 0000730272
Period of Report: 2018-05-08

Reporting Person: EDDLEMAN ROY T (10% Owner)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2018-05-08	Common Stock	S	49227	$40.77	Disposed	850773	Indirect
2018-05-08	Common Stock	S	25000	$40.66	Disposed	455000	Indirect
2018-05-09	Common Stock	S	20773	$40.52	Disposed	830000	Indirect
2018-05-09	Common Stock	S	25000	$40.37	Disposed	430000	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	357518	Direct
Common Stock	3044826	Indirect

Footnotes

F1: The price is a weighted-average price. The shares were sold in multiple transactions at prices ranging from $40.5515 to $41.0078, 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 within the price ranges set forth in this footnote (1) and in footnotes (3) - (5) to this Form 4.

F2: 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.

F3: The price is a weighted-average price. The shares were sold in multiple transactions at prices ranging from $40.5607 to $41.0107, inclusive.

F4: The shares shown are held, of record, by another 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.

F5: The price is a weighted-average price. The shares were sold in multiple transactions at prices ranging from $40.2401 to $40.70, inclusive.

F6: The price is a weighted-average price. The shares were sold in multiple transactions at prices ranging from $40.2102 to $40.6022, inclusive.

F7: The shares shown are held for the benefit of the reporting person in a 15-month escrow account established in connection with the acquisition of Spectrum, Inc. by the issuer on August 1, 2017 and are subject to potential indemnification claims of the issuer relating to the acquisition.

F8: 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.