Repligen Ownership | Who Owns Repligen?

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Repligen Ownership Summary

Repligen is owned by 106.37% institutional investors, 6.38% insiders. Blackrock is the largest institutional shareholder, holding 13.54% of RGEN shares. iShares Core S&P Mid-Cap ETF is the top mutual fund, with 3.02% of its assets in Repligen shares.

RGEN Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Repligen	106.37%	6.38%	-12.75%
Sector	Healthcare Stocks	42.54%	10.83%	46.63%
Industry	Medical Instruments & Supplies Stocks	40.77%	13.85%	45.38%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Blackrock	7.57M	13.54%	$954.08M
Blackrock funding, inc. /de	6.14M	10.93%	$820.70M
Vanguard group	5.04M	8.98%	$674.26M
Price t rowe associates inc /md/	3.51M	6.24%	$468.83M
United capital financial advisers	2.76M	4.91%	$368.39M
Fmr	2.69M	4.79%	$359.73M
State street	1.80M	3.21%	$240.81M
Point72 asset management	1.44M	2.56%	$192.58M
Holocene advisors, lp	1.38M	2.45%	$184.08M
Champlain investment partners	1.34M	2.38%	$179.02M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Iron triangle partners lp	270.00K	5.13%	$36.09M
Brown capital management	668.86K	3.68%	$89.41M
12 west capital management lp	241.23K	3.34%	$32.25M
United capital financial advisers	2.76M	2.64%	$368.39M
Vestal point capital, lp	400.00K	2.41%	$53.47M
Conestoga capital advisors	956.91K	2.05%	$127.91M
Blue whale capital llp	243.10K	1.80%	$32.50M
American capital management	336.86K	1.79%	$45.03M
Lrt capital management	19.62K	1.74%	$2.62M
Sone capital management	138.53K	1.55%	$18.52M

Top Buyers

Holder	Shares	% Assets	Change
United capital financial advisers	2.76M	2.64%	2.76M
Fmr	2.69M	0.02%	1.08M
Holocene advisors, lp	1.38M	0.42%	440.29K
Pointstate capital lp	409.50K	0.82%	409.50K
Vestal point capital, lp	400.00K	2.41%	400.00K

Top Sellers

Holder	Shares	% Assets	Change
Price t rowe associates inc /md/	3.51M	0.05%	-3.10M
Sands capital management	-	-	-1.25M
William blair investment management	-	-	-634.99K
Invesco	873.04K	0.02%	-506.09K
Point72 asset management	1.44M	0.32%	-472.47K

New Positions

Holder	Shares	% Assets	Change	Value
United capital financial advisers	2.76M	2.64%	2.76M	$368.39M
Pointstate capital lp	409.50K	0.82%	409.50K	$54.74M
Vestal point capital, lp	400.00K	2.41%	400.00K	$53.47M
Iron triangle partners lp	270.00K	5.13%	270.00K	$36.09M
Norges bank	166.97K	0.00%	166.97K	$24.03M

Sold Out

Holder	Change
True wealth design	-1.00
Financial gravity asset management	-1.00
Claris advisors, llc / mo /	-1.00
Financial management professionals	-1.00
Impact partnership wealth	-1.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Sep 30, 2025	456	2.01%	59,758,880	6.45%	106	1.07%	225	12.50%	147	-11.98%
Jun 30, 2025	445	-2.20%	58,196,365	1.11%	103	0.98%	198	-13.54%	167	27.48%
Mar 31, 2025	19	-95.77%	3,210,158	-94.33%	5	0.06%	5	-97.49%	12	-92.41%
Dec 31, 2024	436	-5.22%	56,429,795	1.92%	100	1.03%	190	-18.10%	154	-
Sep 30, 2024	455	-2.36%	55,293,886	-1.44%	98	0.98%	229	1.33%	153	-6.71%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
iShares Core S&P Mid-Cap ETF	1.70M	3.02%	-
Vanguard US Total Market Shares ETF	1.68M	2.99%	1.32K
Vanguard Total Stock Mkt Idx Inv	1.68M	2.98%	-35.41K
Vanguard Small Cap Index	1.30M	2.30%	-8.59K
US Small-Cap Growth II Equity Comp	1.23M	2.19%	-84.49K
T. Rowe Price New Horizons	1.23M	2.18%	-2.07K
Sands Capital Global Growth Equity	1.14M	2.02%	-41.08K
Delaware Ivy Mid Cap Growth A	805.66K	1.44%	-
Vanguard Small Cap Growth Index Inv	730.27K	1.30%	-1.14K
Champlain Mid Cap Fund, LLC	699.53K	1.24%	3.88K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Nov 25, 2025	Loeillot Olivier	Chief Executive Officer	Sell	$1.20M
Nov 18, 2025	Bylund James	Chief Operating Officer	Sell	$331.30K
Nov 13, 2025	Hunt Anthony	-	Sell	$385.80K
Nov 13, 2025	Hunt Anthony	-	Sell	$319.56K
Nov 13, 2025	Hunt Anthony	-	Sell	$269.40K

Insider Transactions Trends

Date	Buy	Sell
2025 Q4	-	14
2025 Q3	1	6
2025 Q2	-	5
2025 Q1	1	6
2024 Q4	-	1

RGEN Ownership FAQ

Who Owns Repligen?

Repligen shareholders are primarily institutional investors at 106.37%, followed by 6.38% insiders and -12.75% retail investors. The average institutional ownership in Repligen's industry, Medical Instruments & Supplies Stocks, is 40.77%, which Repligen exceeds.

Who owns the most shares of Repligen?

Repligen’s largest shareholders are Blackrock (7.57M shares, 13.54%), Blackrock funding, inc. /de (6.14M shares, 10.93%), and Vanguard group (5.04M shares, 8.98%). Together, they hold 33.45% of Repligen’s total shares outstanding.

Does Blackrock own Repligen?

Yes, BlackRock owns 13.54% of Repligen, totaling 7.57M shares as of Jun 2024. This represents 0.02% of BlackRock's total assets, with a market value of 954.08M$. In the last quarter, BlackRock decreased its holdings by -205K shares, a -2.63% change.

Who is Repligen’s biggest shareholder by percentage of total assets invested?

Iron triangle partners lp is Repligen’s biggest shareholder by percentage of total assets invested, with 5.13% of its assets in 270K Repligen shares, valued at 36.09M$.

Who is the top mutual fund holder of Repligen shares?

iShares Core S&P Mid-Cap ETF is the top mutual fund holder of Repligen shares, with 3.02% of its total shares outstanding invested in 1.7M Repligen shares.

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