Repligen (RGEN) CFO completes 733-share Rule 10b5-1 stock sale

Rhea-AI Filing Summary

REPLIGEN CORP CFO Jason K. Garland sold a small block of company stock in a pre-planned transaction. On the reported date, he completed an open-market sale of 733 shares of common stock at a price of $145 per share. After this sale, he directly owns 19,359 shares of Repligen common stock. The filing notes that the sale was executed under a Rule 10b5-1 trading plan adopted on December 8, 2025, indicating the transaction was pre-scheduled rather than timed discretionarily.

Insider Trade Summary 10b5-1

Net Seller: 733 shares ($106,285)

Net Sell 1 txn

Insider Garland Jason K

Role CFO

Sold 733 shs ($106K)

Type	Security	Shares	Price	Value
Sale	Common Stock	733	$145.00	$106K

Holdings After Transaction: Common Stock — 19,359 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

Shares sold: 733 shares Sale price: $145 per share Shares owned after sale: 19,359 shares +3 more

6 metrics

Shares sold 733 shares Open-market sale of common stock

Sale price $145 per share Price for 733-share sale

Shares owned after sale 19,359 shares Direct holdings post-transaction

Net shares sold 733 shares Net sell direction in transaction summary

Transaction date June 25, 2026 Date of open-market sale

Trading plan adoption date December 8, 2025 Rule 10b5-1 plan adoption

Key Terms

Rule 10b5-1 trading plan, open-market sale, Common Stock, Form 4

4 terms

Rule 10b5-1 trading plan regulatory

"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 8, 2025."

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

open-market sale financial

"transaction_action": "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Common Stock financial

""security_title": "Common Stock""

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

Form 4 regulatory

"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 06/26/2026 - 04:05 PM Accepted by SEC EDGAR 06/26/2026 - 04:05 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

X

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Garland Jason K

(Last) (First) (Middle)

C/O REPLIGEN CORPORATION

41 SEYON ST., BLDG 1, STE 100

(Street)

WALTHAM MASSACHUSETTS 02453

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
REPLIGEN CORP [ RGEN ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	CFO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/25/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	06/25/2026		S(1)		733	D	$145	19,359	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 8, 2025.

	/s/ Jennifer Carmichael (Attorney in Fact)	06/26/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did REPLIGEN (RGEN) disclose in this Form 4?

REPLIGEN disclosed that CFO Jason K. Garland sold 733 shares of common stock at $145 per share. The sale was an open-market transaction executed under a pre-arranged Rule 10b5-1 trading plan adopted on December 8, 2025.

How many REPLIGEN (RGEN) shares did the CFO sell and at what price?

The CFO sold 733 shares of REPLIGEN common stock at $145 per share. This was recorded as an open-market sale, with the transaction formally reported in a Form 4 insider trading filing for transparency to investors.

How many REPLIGEN (RGEN) shares does the CFO hold after this sale?

After the reported transaction, CFO Jason K. Garland directly holds 19,359 shares of REPLIGEN common stock. This post-transaction ownership figure is disclosed in the Form 4 to show his remaining stake following the 733-share open-market sale.

Was the REPLIGEN (RGEN) CFO sale made under a Rule 10b5-1 plan?

Yes. The Form 4 states the sales were effected under a Rule 10b5-1 trading plan adopted on December 8, 2025. Such plans typically schedule trades in advance, reducing discretion over transaction timing by the reporting insider.

What type of transaction is reported for REPLIGEN (RGEN) in this Form 4?

The filing reports a non-derivative open-market sale of common stock, coded as “S” for sale. There were no derivative exercises or gifts disclosed, and the transaction involved a straightforward sale of 733 shares at $145 per share.