Who owns Repligen (RGEN)
Which tracked institutional funds hold RGEN, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See RGEN company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
176 tracked funds added or opened RGEN while 78 trimmed or exited it between 2026-Q1 and 2026-Q2 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
RGEN’s largest tracked holder by dollar value, BlackRock, Inc., sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp gap the other way — the median holder sizes RGEN more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in RGEN divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 446 tracked filers holding RGEN, 253 increased or opened the position and 225 reduced or closed it; over the same quarter, open-market insider Form 4s were net sales.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in RGEN between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 38
- WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC$108M
- Jupiter Topco LLC$55M
- MARSHALL WACE, LLP$38M
- BRADLEY FOSTER & SARGENT INC/CT$27M
- PEREGRINE CAPITAL MANAGEMENT LLC$12M
- BOUSSARD & GAVAUDAN GESTION SAS$11M
Full exits 43
- T. Rowe Price Investment Management, Inc.$161M
- Thrivent Financial for Lutherans$50M
- Artisan Partners Limited Partnership$22M
- Ranger Investment Management, L.P.$19M
- PUBLIC EMPLOYEES RETIREMENT ASSOCIATION OF COLORADO$16M
- TEACHERS RETIREMENT SYSTEM OF THE STATE OF KENTUCKY$12M
Largest adds
- BlackRock, Inc.$168M
- FMR LLC$120M
- AMERIPRISE FINANCIAL INC$106M
- Holocene Advisors, LP$93M
- MAVERICK CAPITAL LTD$92M
- WASATCH ADVISORS LP$70M
Largest trims
- PRICE T ROWE ASSOCIATES INC /MD/$336M
- CITADEL ADVISORS LLC$78M
- Vestal Point Capital, LP$54M
- Point72 Asset Management, L.P.$44M
- ALLIANCEBERNSTEIN L.P.$43M
- Champlain Investment Partners, LLC$38M
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. added | 5,384,938 | $735M | 8.9% | 2026-Q2 |
| FMR LLC added | 3,326,690 | $454M | 5.5% | 2026-Q2 |
| UNITED CAPITAL FINANCIAL ADVISORS, LLC added | 2,790,650 | $381M | 4.6% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 2,411,171 | $329M | 4.0% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC added | 2,312,825 | $316M | 3.8% | 2026-Q2 |
| MAVERICK CAPITAL LTD added | 1,984,554 | $271M | 3.3% | 2026-Q2 |
| STATE STREET CORP added | 1,800,530 | $246M | 3.0% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ trimmed | 1,752,274 | $239M | 2.9% | 2026-Q2 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ added | 1,617,021 | $221M | 2.7% | 2026-Q2 |
| WASATCH ADVISORS LP added | 1,590,251 | $217M | 2.6% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC added | 1,576,132 | $215M | 2.6% | 2026-Q2 |
| Bank of New York Mellon Corp trimmed | 1,522,859 | $208M | 2.5% | 2026-Q2 |
| Invesco Ltd. added | 1,387,242 | $189M | 2.3% | 2026-Q2 |
| Holocene Advisors, LP added | 1,292,191 | $176M | 2.1% | 2026-Q2 |
| RTW INVESTMENTS, LP added | 1,240,637 | $169M | 2.1% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC trimmed | 1,062,476 | $145M | 1.8% | 2026-Q2 |
| CONGRESS ASSET MANAGEMENT CO added | 1,012,226 | $138M | 1.7% | 2026-Q2 |
| Conestoga Capital Advisors, LLC trimmed | 980,983 | $134M | 1.6% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC added | 965,411 | $132M | 1.6% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP added | 949,863 | $130M | 1.6% | 2026-Q2 |
| Stephens Investment Management Group LLC added | 937,084 | $128M | 1.6% | 2026-Q2 |
| FRANKLIN RESOURCES INC trimmed | 890,216 | $121M | 1.5% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. trimmed | 795,282 | $94M | 1.1% | 2026-Q2 |
| UBS Group AG added | 795,009 | $108M | 1.3% | 2026-Q2 |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC new | 788,571 | $108M | 1.3% | 2026-Q2 |
| BAMCO INC /NY/ added | 748,466 | $102M | 1.2% | 2026-Q2 |
| FRED ALGER MANAGEMENT, LLC added | 733,739 | $100M | 1.2% | 2026-Q2 |
| SCHRODER INVESTMENT MANAGEMENT GROUP added | 696,173 | $95M | 1.2% | 2026-Q2 |
| GENEVA CAPITAL MANAGEMENT LLC trimmed | 656,093 | $90M | 1.1% | 2026-Q2 |
| FIRST TRUST ADVISORS LP added | 634,219 | $87M | 1.0% | 2026-Q2 |
| NORGES BANK added | 575,226 | $78M | 1.0% | 2026-Q2 |
| VOYA INVESTMENT MANAGEMENT LLC trimmed | 549,203 | $75M | 0.9% | 2026-Q2 |
| MORGAN STANLEY trimmed | 543,242 | $74M | 0.9% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 481,744 | $66M | 0.8% | 2026-Q2 |
| TimesSquare Capital Management, LLC trimmed | 446,964 | $61M | 0.7% | 2026-Q2 |
| NORTHERN TRUST CORP trimmed | 444,146 | $61M | 0.7% | 2026-Q2 |
| JPMORGAN CHASE & CO added | 427,770 | $59M | 0.7% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ added | 426,291 | $58M | 0.7% | 2026-Q2 |
| Jupiter Topco LLC new | 406,001 | $55M | 0.7% | 2026-Q2 |
| Vestal Point Capital, LP trimmed | 400,000 | $55M | 0.7% | 2026-Q2 |
| Impax Asset Management Group plc trimmed | 396,513 | $54M | 0.7% | 2026-Q2 |
| CITADEL ADVISORS LLC trimmed | 376,309 | $51M | 0.6% | 2026-Q2 |
| SEI INVESTMENTS CO added | 373,307 | $51M | 0.6% | 2026-Q2 |
| AMERICAN CAPITAL MANAGEMENT INC added | 361,055 | $49M | 0.6% | 2026-Q2 |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. trimmed | 356,942 | $49M | 0.6% | 2026-Q2 |
| DF DENT & CO INC trimmed | 356,854 | $49M | 0.6% | 2026-Q2 |
| BALYASNY ASSET MANAGEMENT L.P. added | 355,507 | $49M | 0.6% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 336,295 | $46M | 0.6% | 2026-Q2 |
| Granahan Investment Management, LLC added | 332,271 | $45M | 0.5% | 2026-Q2 |
| PRIMECAP MANAGEMENT CO/CA/ added | 323,268 | $44M | 0.5% | 2026-Q2 |
| Champlain Investment Partners, LLC trimmed | 318,955 | $44M | 0.5% | 2026-Q2 |
| SILVERCREST ASSET MANAGEMENT GROUP LLC added | 290,559 | $40M | 0.5% | 2026-Q2 |
| MARSHALL WACE, LLP trimmed | 282,107 | $38M | 0.5% | 2026-Q2 |
| 12 West Capital Management LP added | 280,165 | $38M | 0.5% | 2026-Q2 |
| Daiwa Securities Group Inc. added | 265,972 | $36M | 0.4% | 2026-Q2 |
| PERCEPTIVE ADVISORS LLC trimmed | 248,212 | $34M | 0.4% | 2026-Q2 |
| LMR Partners LLP trimmed | 228,600 | $31M | 0.4% | 2026-Q2 |
| AMERICAN CENTURY COMPANIES INC trimmed | 213,004 | $29M | 0.4% | 2026-Q2 |
| NZS Capital, LLC added | 205,257 | $28M | 0.3% | 2026-Q2 |
| BRADLEY FOSTER & SARGENT INC/CT added | 195,435 | $27M | 0.3% | 2026-Q2 |
| Blue Whale Capital LLP trimmed | 178,377 | $24M | 0.3% | 2026-Q2 |
| BRAIDWELL LP added | 177,100 | $24M | 0.3% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 176,838 | $24M | 0.3% | 2026-Q2 |
| ROYCE & ASSOCIATES LP added | 174,794 | $24M | 0.3% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC added | 172,826 | $24M | 0.3% | 2026-Q2 |
| RIVERBRIDGE PARTNERS LLC trimmed | 172,507 | $24M | 0.3% | 2026-Q2 |
| SEGALL BRYANT & HAMILL, LLC added | 169,811 | $23M | 0.3% | 2026-Q2 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. trimmed | 168,256 | $23M | 0.3% | 2026-Q2 |
| Point72 Asset Management, L.P. trimmed | 166,157 | $23M | 0.3% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC trimmed | 161,713 | $22M | 0.3% | 2026-Q2 |
| FIFTH THIRD BANCORP trimmed | 157,424 | $21M | 0.3% | 2026-Q2 |
| BARCLAYS PLC trimmed | 155,745 | $21M | 0.3% | 2026-Q2 |
| Allspring Global Investments Holdings, LLC trimmed | 153,107 | $21M | 0.3% | 2026-Q2 |
| LOOMIS SAYLES & CO L P trimmed | 148,676 | $20M | 0.2% | 2026-Q2 |
| Baird Financial Group, Inc. trimmed | 144,571 | $20M | 0.2% | 2026-Q2 |
| Gotham Asset Management, LLC added | 142,613 | $19M | 0.2% | 2026-Q2 |
| BROWN CAPITAL MANAGEMENT LLC trimmed | 140,899 | $19M | 0.2% | 2026-Q2 |
| ENVESTNET ASSET MANAGEMENT INC added | 140,415 | $19M | 0.2% | 2026-Q2 |
| RHUMBLINE ADVISERS trimmed | 134,370 | $18M | 0.2% | 2026-Q2 |
| Curi Capital, LLC added | 125,661 | $17M | 0.2% | 2026-Q2 |
| Artemis Investment Management LLP trimmed | 121,727 | $17M | 0.2% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC trimmed | 120,383 | $16M | 0.2% | 2026-Q2 |
| Nuveen, LLC added | 117,519 | $16M | 0.2% | 2026-Q2 |
| NEW YORK STATE COMMON RETIREMENT FUND trimmed | 117,103 | $16M | 0.2% | 2026-Q2 |
| OSAIC HOLDINGS, INC. added | 115,136 | $16M | 0.2% | 2026-Q2 |
| ROYAL BANK OF CANADA trimmed | 111,759 | $15M | 0.2% | 2026-Q2 |
| OSTERWEIS CAPITAL MANAGEMENT INC added | 110,995 | $15M | 0.2% | 2026-Q2 |
| PALISADE CAPITAL MANAGEMENT, LP trimmed | 109,768 | $15M | 0.2% | 2026-Q2 |
| VICTORY CAPITAL MANAGEMENT INC added | 109,432 | $15M | 0.2% | 2026-Q2 |
| Swiss National Bank trimmed | 104,700 | $14M | 0.2% | 2026-Q2 |
| PEREGRINE CAPITAL MANAGEMENT LLC added | 89,969 | $12M | 0.1% | 2026-Q2 |
| D. E. Shaw & Co., Inc. added | 83,328 | $11M | 0.1% | 2026-Q2 |
| Freshford Capital Management, LLC new | 79,048 | $11M | 0.1% | 2026-Q2 |
| Avidity Partners Management LP | 77,800 | $11M | 0.1% | 2026-Q2 |
| NORTH STAR ASSET MANAGEMENT INC trimmed | 77,561 | $11M | 0.1% | 2026-Q2 |
| Duquesne Family Office LLC new | 77,400 | $11M | 0.1% | 2026-Q2 |
| JENNISON ASSOCIATES LLC trimmed | 74,996 | $10M | 0.1% | 2026-Q2 |
| Pier Capital, LLC added | 74,238 | $10M | 0.1% | 2026-Q2 |
| Assenagon Asset Management S.A. added | 70,995 | $10M | 0.1% | 2026-Q2 |
| BOUSSARD & GAVAUDAN GESTION SAS new | 11,145 | $11M | 0.1% | 2026-Q2 |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.