$RGEN

$184.69 +$8.89 (5.06%) Close

$RGEN Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 56.4M shares outstanding

Who owns RGEN?

By type of holder

Institutions 100.0% Insiders 0.0% Everyone else 0.0%

Concentration Top 10 holders own 44.2%

BlackRock, Inc. 9.5% · Price T Rowe Associates Inc /MD/ 3.1%

Institutional ownership

100.0%

0 pts vs last qtr

Institutional holders

481

+35 vs last qtr

Net shares bought

+554.1K

by institutions in Q2 2026

New / sold out

97 / 62

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

William Blair Investment Management, LLC NEW +788.6K
Ameriprise Financial Inc +650.9K

Biggest sellers in Q2 2026

Price T Rowe Associates Inc /MD/ −3.1M
Citadel Advisors LLC −722.9K

Who is planning to sell?

Notices of proposed sale, last 12 months

$15.3M

14 notices from 5 people

Shares covered

92.0K

0.16% of the company

Arranged in advance

77%

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

Loeillot Olivier Officer 10b5-1 $7.69M
Hunt Anthony Director $7.01M

Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

Diluted share count, FY2016–FY2025

+65.9%

+5.78% a year

Each share's claim on the business

−39.7%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

$14.4M vs $212M

over 10 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years64% 3–5 years7% 1–3 years7% Under 1 year22%

Quarterly turnover

14.6%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting RGEN on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
B BlackRock, Inc.	5.4M	9.54%	−608.1K (−10.1%)	≤2021	0.0%
Shares held by quarter Peak holding7.1M (Q3'24) Change over 8 quarters−1.7M Share of the company9.540% BlackRock, Inc.'s full portfolio →
PT Price T Rowe Associates Inc /MD/	1.8M	3.10%	−3.1M (−64.1%)	≤2021	0.0%
Shares held by quarter Peak holding7.6M (Q1'25) Change over 8 quarters−4.6M Share of the company3.100% Price T Rowe Associates Inc /MD/'s full portfolio →

BlackRock, Inc.

5.4M

% of company

9.54%

Change vs last qtr

−608.1K (−10.1%)

Held since

≤2021

Price T Rowe Associates Inc /MD/

1.8M

% of company

3.10%

Change vs last qtr

−3.1M (−64.1%)

Held since

≤2021

28 more super investors behind a free account

See every manager holding Repligen Corporation, how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting RGEN on Form N-PORT; together they hold 58.9% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
IC iShares Core S&P Mid-Cap ETF iShares Trust	$248M	1.8M	3.22%	0.20%	June 30, 2026
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$232M	1.7M	3.02%	0.01%	June 30, 2026

iShares Core S&P Mid-Cap ETF

iShares Trust

Position value

$248M

% of company

3.22%

% of the fund

0.20%

As of

June 30, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$232M

% of company

3.02%

% of the fund

0.01%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Repligen Corporation and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
DK Dawes Karen A Insider	92.8K	0.16%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.160% Dawes Karen A's insider activity →
HA Hunt Anthony Insider	89.1K	0.16%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.160% Hunt Anthony's insider activity →

Dawes Karen A

Insider

92.8K

% of company

0.16%

Change vs last qtr

—

Held since

—

Hunt Anthony

Insider

89.1K

% of company

0.16%

Change vs last qtr

—

Held since

—

13 more holders behind a free account

See every insider and 5%+ holder of Repligen Corporation.

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