Repligen Ownership | Who Owns Repligen?

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Repligen Ownership Summary

Repligen is owned by 117.84% institutional investors, 5.24% insiders. Blackrock is the largest institutional shareholder, holding 13.54% of RGEN shares. Vanguard Morn Total Stk Mkt Idx Investor is the top mutual fund, with 3.48% of its assets in Repligen shares.

RGEN Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Repligen	117.84%	5.24%	-23.08%
Sector	Healthcare Stocks	244.59%	12.11%	-156.70%
Industry	Medical Instruments & Supplies Stocks	63.80%	11.77%	24.43%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Blackrock	7.57M	13.54%	$954.08M
Blackrock funding, inc. /de	5.38M	9.56%	$734.72M
Vanguard group	4.99M	8.88%	$818.31M
Fmr	3.33M	5.90%	$453.89M
United capital financial advisers	2.79M	4.95%	$380.76M
Vanguard capital management	2.41M	4.28%	$328.98M
Maverick capital	1.98M	3.52%	$270.77M
State street	1.80M	3.19%	$245.68M
Price t rowe associates inc /md/	1.75M	3.11%	$239.08M
Massachusetts financial services co /ma/	1.62M	2.87%	$220.61M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
12 west capital management lp	280.17K	7.15%	$38.23M
Iron triangle partners lp	270.00K	5.13%	$36.09M
Brown capital management	140.90K	3.84%	$19.22M
Freshford capital management	79.05K	3.69%	$10.79M
Conestoga capital advisors	980.98K	2.91%	$133.85M
Maverick capital	1.98M	2.39%	$270.77M
Watershed asset management	18.80K	2.29%	$2.57M
American capital management	361.06K	2.21%	$49.26M
United capital financial advisers	2.79M	2.10%	$380.76M
Geneva capital management	656.09K	2.05%	$89.52M

Top Buyers

Holder	Shares	% Assets	Change
William blair investment management	788.57K	0.32%	788.57K
Ameriprise financial	1.58M	0.04%	650.92K
Holocene advisors, lp	1.29M	0.40%	583.30K
Norges bank	575.23K	0.01%	575.23K
Sixth street partners management company	481.74K	0.01%	481.74K

Top Sellers

Holder	Shares	% Assets	Change
Price t rowe associates inc /md/	1.75M	0.02%	-3.13M
Sands capital management	-	-	-1.25M
Citadel advisors	376.31K	0.01%	-722.87K
Blackrock funding, inc. /de	5.38M	0.01%	-608.12K
Vestal point capital, lp	400.00K	1.28%	-525.00K

New Positions

Holder	Shares	% Assets	Change	Value
William blair investment management	788.57K	0.32%	788.57K	$107.59M
Norges bank	575.23K	0.01%	575.23K	$78.48M
Sixth street partners management company	481.74K	0.01%	481.74K	$65.73M
Pointstate capital lp	409.50K	0.82%	409.50K	$54.74M
Iron triangle partners lp	270.00K	5.13%	270.00K	$36.09M

Sold Out

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

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Jun 30, 2026	489	7.95%	66,406,859	1.49%	117	0.87%	276	17.95%	137	5.38%
Mar 31, 2026	336	-30.86%	35,744,636	-42.77%	63	0.51%	166	-32.79%	97	-33.10%
Dec 31, 2025	370	-21.94%	40,110,060	-33.38%	71	0.62%	187	-20.09%	105	-30.92%
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%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Vanguard Morn Total Stk Mkt Idx Investor	1.70M	3.48%	-4.29K
iShares Core S&P Mid-Cap ETF	1.82M	3.23%	56.00
Vanguard MStar Total Stk Mkt Idx Invest	1.71M	3.03%	5.30K
Vanguard Total Stock Mkt Idx Inv	1.70M	3.02%	-4.29K
Vanguard US Total Market Shares ETF	1.68M	2.99%	1.32K
Vanguard Small Cap Index	1.23M	2.18%	2.30K
Sands Capital Global Growth Equity	1.14M	2.02%	-41.08K
MFS Mid Cap Growth A	961.23K	1.70%	-
MFS Mid Cap Growth Equity	961.23K	1.70%	98.86K
US Small-Cap Growth II Equity Comp	854.73K	1.52%	-401.16K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Sep 04, 2026	Loeillot Olivier	Chief Executive Officer	Sell	$503.51K
Aug 20, 2026	Loeillot Olivier	Chief Executive Officer	Sell	$976.68K
Jul 16, 2026	Garland Jason K	CFO	Sell	$79.50K
Jun 25, 2026	Garland Jason K	CFO	Sell	$106.28K
Apr 21, 2026	Loeillot Olivier	Chief Executive Officer	Sell	$536.48K

Insider Transactions Trends

Date	Buy	Sell
2026 Q3	-	2
2026 Q2	-	2
2026 Q1	-	-
2025 Q4	-	15
2025 Q3	1	6

RGEN Ownership FAQ

Who Owns Repligen?

Repligen shareholders are primarily institutional investors at 117.84%, followed by 5.24% insiders and -23.08% retail investors. The average institutional ownership in Repligen's industry, Medical Instruments & Supplies Stocks, is 63.80%, 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 (5.38M shares, 9.56%), and Vanguard group (4.99M shares, 8.88%). Together, they hold 31.98% 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?

12 west capital management lp is Repligen’s biggest shareholder by percentage of total assets invested, with 7.15% of its assets in 280.16K Repligen shares, valued at 38.23M$.

Who is the top mutual fund holder of Repligen shares?

Vanguard Morn Total Stk Mkt Idx Investor is the top mutual fund holder of Repligen shares, with 3.48% of its total shares outstanding invested in 1.7M Repligen shares.

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