Repligen (NASDAQ: RGEN) Eddleman trusts report passive stake under 5%

Rhea-AI Filing Summary

Repligen Corporation’s common stock ownership has been updated by several Eddleman-related trusts in an amended Schedule 13G.

The Roy T. Eddleman Living Trust reports beneficial ownership of 2,705,689 shares of Repligen common stock, representing 4.81% of the class. The Roy T. Eddleman Charitable Remainder Trust #1 reports beneficial ownership of 29,604 shares, representing 0.001% of the class, while Charitable Remainder Trust #2 reports no shares. Co‑trustees Geoffrey Paul, Nereyda Rubio and Anis Garci share voting and investment power over a total of 2,735,293 shares. The filing states these securities are held on a passive basis and not for the purpose of changing or influencing control of Repligen.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 8)

REPLIGEN CORPORATION

(Name of Issuer)

Common Stock, $.01 par value per share

(Title of Class of Securities)

759916109

(CUSIP Number)

12/31/2025

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13G

CUSIP No. 759916109

1

Names of Reporting Persons

Roy T. Eddleman Living Trust

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 2,705,689.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 2,705,689.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,705,689.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

4.81 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

CUSIP No. 759916109

1

Names of Reporting Persons

Roy T. Eddleman Charitable Remainder Trust #1

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 29,604.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 29,604.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

29,604.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

0.001 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

CUSIP No. 759916109

1

Names of Reporting Persons

Roy T. Eddleman Charitable Remainder Trust #2

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

0.00 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

Item 1.
(a)	Name of issuer: REPLIGEN CORPORATION
(b)	Address of issuer's principal executive offices: 41 Seyon Street, Waltham, Massachusetts 02453
Item 2.
(a)	Name of person filing: (i) Roy T. Eddleman Living Trust (Admin) UAD 8/17/2000 (ii) Roy T. Eddleman Charitable Remainder Trust #1 (iii) Roy T. Eddleman Charitable Remainder Trust #2
(b)	Address or principal business office or, if none, residence: c/o TroyGould PC, 1801 Century Park East, 16th Floor, Los Angeles, California 90067, Attention: Sherry Davaie.
(c)	Citizenship: Each reporting person was formed under the laws of the United States.
(d)	Title of class of securities: Common Stock, $.01 par value per share
(e)	CUSIP No.: 759916109
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: Geoffrey Paul, Nereyda Rubio and Anis Garci are the co-trustees of each reporting person. As co-trustees, each co-trustee has investment and voting control over the shares covered by this Schedule and may be deemed to have shared voting power and shared investment power with respect to all such shares. The co-trustees disclaim beneficial ownership of each reporting persons' shares except to the extent of his/her pecuniary interest therein. The percentage ownership information is calculated based upon 56,290,749 shares of common stock of the Issuer issued and outstanding as ofOctober 30, 2025, as reported in the Issuer's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on November 4, 2025.
(b)	Percent of class: See Item 9 of the cover page.
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 0
	(ii) Shared power to vote or to direct the vote: 2,735,293
	(iii) Sole power to dispose or to direct the disposition of: 0
	(iv) Shared power to dispose or to direct the disposition of: 2,735,293
Item 5.	Ownership of 5 Percent or Less of a Class.
	Ownership of 5 percent or less of a class
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Roy T. Eddleman Living Trust

Signature:	/s/ Nereyda Rubio
Name/Title:	Nereyda Rubio/Co-Trustee
Date:	02/13/2026

Signature:	/s/ Anis Garci
Name/Title:	Anis Garci/Co-Trustee
Date:	02/13/2026

Signature:	/s/ Geoffrey Paul
Name/Title:	Geoffrey Paul/Co-Trustee
Date:	02/13/2026

Roy T. Eddleman Charitable Remainder Trust #1

Signature:	/s/ Nereyda Rubio
Name/Title:	Nereyda Rubio/Co-Trustee
Date:	02/13/2026

Signature:	/s/ Anis Garci
Name/Title:	Anis Garci/Co-Trustee
Date:	02/13/2026

Signature:	/s/ Geoffrey Paul
Name/Title:	Geoffrey Paul/Co-Trustee
Date:	02/13/2026

Roy T. Eddleman Charitable Remainder Trust #2

Signature:	/s/ Nereyda Rubio
Name/Title:	Nereyda Rubio/Co-Trustee
Date:	02/13/2026

Signature:	/s/ Anis Garci
Name/Title:	Anis Garci/Co-Trustee
Date:	02/13/2026

Signature:	/s/ Geoffrey Paul
Name/Title:	Geoffrey Paul/Co-Trustee
Date:	02/13/2026

FAQ

What does the amended Schedule 13G/A report for Repligen (RGEN)?

The amended Schedule 13G/A reports updated ownership of Repligen by Eddleman-related trusts. The Living Trust holds 2,705,689 shares and Charitable Remainder Trust #1 holds 29,604 shares of common stock, with co‑trustees sharing voting and investment power over 2,735,293 shares in total.

How many Repligen (RGEN) shares does the Roy T. Eddleman Living Trust own?

The Roy T. Eddleman Living Trust reports beneficial ownership of 2,705,689 Repligen common shares. This stake represents 4.81% of the company’s outstanding common stock, based on 56,290,749 shares outstanding as of October 30, 2025, as cited in the ownership calculation.

What percentage of Repligen (RGEN) does each Eddleman trust hold?

The Roy T. Eddleman Living Trust holds 4.81% of Repligen’s common stock. The Roy T. Eddleman Charitable Remainder Trust #1 holds 29,604 shares, representing 0.001% of the class, while Charitable Remainder Trust #2 reports beneficial ownership of zero Repligen common shares in this filing.

Who controls voting and investment decisions for the Repligen (RGEN) shares in these trusts?

Co‑trustees Geoffrey Paul, Nereyda Rubio and Anis Garci control voting and investment decisions. As co‑trustees of each reporting person, they share voting and dispositive power over 2,735,293 Repligen shares and may be deemed to have shared beneficial ownership subject to their pecuniary interests.

Are the Eddleman trusts seeking to influence control of Repligen (RGEN)?

The filing explicitly certifies the shares are not held to change or influence control of Repligen. It states the securities were not acquired and are not held for control purposes, other than activities solely connected with a nomination under Rule 240.14a‑11, indicating a passive investment intent.

Why does the Schedule 13G/A note ownership of 5 percent or less for Repligen (RGEN)?

The ownership section states "Ownership of 5 percent or less of a class," indicating the reporting persons now hold 5% or less of Repligen’s common stock. The detailed cover pages show the Living Trust at 4.81% and Charitable Remainder Trust #1 at 0.001%, with no shares in Trust #2.