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Who owns Repligen (RGEN) stock

462 funds reported Repligen (RGEN) shares in their latest 13F filings, worth $9.5B in all. The largest holder is Vanguard Group ($818M). Last quarter 233 funds added to their stakes and 174 cut them. Members of Congress and other officials disclosed 1 trade (0 buys, 1 sales).

Largest holders of RGEN (13F)Largest holders of RGEN (13F)Vanguard Group$818MBlackRock$735MFMR LLC$454MUnited Capital Financial Advisors…$381MVanguard Capital Management LLC$329MVanguard Portfolio Management LLC$316MMaverick Capital$271MState Street$246MPrice T Rowe Associates$239MMassachusetts Financial Services$221M

Largest holders (13F)

FundSharesValueChangeQuarter
Vanguard Group4,993,945$818Mdecrease2025-12-31
BlackRock5,384,938$735Mdecrease2026-06-30
FMR LLC3,326,690$454Mincrease2026-06-30
United Capital Financial Advisors, LLC2,790,650$381Mincrease2026-06-30
Vanguard Capital Management LLC2,411,171$329Mincrease2026-06-30
Vanguard Portfolio Management LLC2,312,825$316Mincrease2026-06-30
Maverick Capital1,984,554$271Mincrease2026-06-30
State Street1,800,530$246Mincrease2026-06-30
Price T Rowe Associates1,752,274$239Mdecrease2026-06-30
Massachusetts Financial Services1,617,021$221Mincrease2026-06-30
Ameriprise Financial1,576,132$215Mincrease2026-06-30
Bank of New York Mellon1,522,859$208Mdecrease2026-06-30
T. Rowe Price Investment Management1,411,619$193Mincrease2026-06-30
Invesco1,387,242$189Mincrease2026-06-30
Holocene Advisors, LP1,292,191$176Mincrease2026-06-30

Trades by Congress and other officials

DateWhoTradeAmount
2025-10-31Lisa McClainsale$1K–$15K

Repligen's latest quarter

Repligen, Q3 2026: revenue $209M (+11% year over year), operating margin -14.1%, net loss $38.4M, operating cash flow $43.1M. The chart follows the revenue to costs, profit and cash.

Questions

Who owns the most RGEN stock?

By the latest 13F filings: Vanguard Group ($818M); BlackRock ($735M); FMR LLC ($454M); United Capital Financial Advisors, LLC ($381M); Vanguard Capital Management LLC ($329M).

Has Congress traded RGEN stock?

Officials disclosed 1 trade on file: 0 buys and 1 sales. The latest: Lisa McClain, sale on 2025-10-31.

What is the short interest in RGEN?

7,145,036 shares were sold short at the 2026-10-15 settlement, -5.76% of the float.

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Updated Nov 8, 2026. Read automatically from SEC filings and public data; errors are possible. Not investment advice.