RGEN Institutional Ownership & Shareholders
REPLIGEN CORP (RGEN) is currently held by 467 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $8.87B based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of RGEN tracked by InsiderSet, reporting ownership valued at approximately $734.72M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $1.02B, representing an estimated gain of +38.89% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 38% of the total disclosed RGEN value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Fmr Llc, United Capital Financial Advisors, Llc, and several other long-term asset managers with concentrated positions in REPLIGEN CORP (RGEN).
This page ranks the largest institutional RGEN shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
467
Total Reported Value
$8.87B
Largest Holder
Blackrock, Inc.
Largest Position
$734.72M
Insider Transactions (90d)
12
Latest Filing Quarter
Q2 2026
New Institutional Positions
58
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.01% | 5,384,938 | $734,720,970 | $1,020,445,751 | +$285,724,781 | +38.89% | |
| Fmr Llc | 0.02% | 3,326,690 | $453,893,517 | $630,407,755 | +$176,514,238 | +38.89% | |
| United Capital Financial Advisors, Llc | 2.10% | 2,790,650 | $380,756,286 | $528,828,175 | +$148,071,889 | +38.89% | |
| Vanguard Capital Management Llc | 0.01% | 2,411,171 | $328,980,171 | $456,916,905 | +$127,936,734 | +38.89% | |
| Vanguard Portfolio Management Llc | 0.01% | 2,312,825 | $315,561,843 | $438,280,338 | +$122,718,495 | +38.89% | |
| Maverick Capital Ltd | 2.44% | 1,984,554 | $270,772,548 | $376,072,983 | +$105,300,435 | +38.89% | |
| State Street Corp | 0.01% | 1,800,530 | $245,681,945 | $341,200,435 | +$95,518,490 | +38.88% | |
| Price T Rowe Associates Inc | 0.02% | 1,752,274 | $239,081,000 | $332,055,923 | +$92,974,923 | +38.89% | |
| Massachusetts Financial Services Co | 0.07% | 1,617,021 | $220,610,156 | $306,425,480 | +$85,815,324 | +38.90% | |
| Wasatch Advisors Lp | 1.42% | 1,590,251 | $216,973,846 | $301,352,565 | +$84,378,719 | +38.89% | |
| Ameriprise Financial Inc | 0.04% | 1,576,132 | $215,047,874 | $298,677,014 | +$83,629,140 | +38.89% | |
| Bank Of New York Mellon Corp | 0.03% | 1,522,859 | $207,778,967 | $288,581,781 | +$80,802,814 | +38.89% | |
| Congress Asset Management Co | 1.27% | 1,020,907 | $196,248,953 | $193,461,877 | -$2,787,077 | -1.42% | |
| T. Rowe Price Investment Management, Inc. | 0.13% | 1,411,619 | $192,602,000 | $267,501,801 | +$74,899,801 | +38.89% | |
| Invesco Ltd. | 0.01% | 1,387,242 | $189,275,298 | $262,882,359 | +$73,607,061 | +38.89% | |
| Holocene Advisors, Lp | 0.40% | 1,292,191 | $176,306,540 | $244,870,195 | +$68,563,655 | +38.89% | |
| Rtw Investments, Lp | 1.45% | 1,240,637 | $169,272,512 | $235,100,712 | +$65,828,200 | +38.89% | |
| Geode Capital Management, Llc | 0.01% | 1,062,476 | $144,997,943 | $201,339,202 | +$56,341,259 | +38.86% | |
| Conestoga Capital Advisors, Llc | 2.91% | 980,983 | $133,845,321 | $185,896,279 | +$52,050,958 | +38.89% | |
| Goldman Sachs Group Inc | 0.01% | 965,411 | $131,720,677 | $182,945,385 | +$51,224,708 | +38.89% | |
| Dimensional Fund Advisors Lp | 0.02% | 949,863 | $129,603,332 | $179,999,039 | +$50,395,707 | +38.88% | |
| Stephens Investment Management Group Llc | 1.37% | 937,084 | $127,855,741 | $177,577,418 | +$49,721,677 | +38.89% | |
| Ubs Group Ag | 0.02% | 795,009 | $108,471,029 | $150,654,206 | +$42,183,177 | +38.89% | |
| William Blair Investment Management, Llc | 0.32% | 788,571 | $107,592,627 | $149,434,205 | +$41,841,578 | +38.89% | |
| Bamco Inc | 0.15% | 748,466 | $102,120,701 | $141,834,307 | +$39,713,606 | +38.89% | |
| Fred Alger Management, Llc | 0.33% | 733,739 | $100,111,349 | $139,043,541 | +$38,932,192 | +38.89% | |
| Schroder Investment Management Group | 0.07% | 696,173 | $94,985,844 | $131,924,784 | +$36,938,940 | +38.89% | |
| Alliancebernstein L.P. | 0.03% | 795,282 | $93,700,125 | $150,705,939 | +$57,005,814 | +60.84% | |
| Geneva Capital Management Llc | 2.05% | 656,093 | $89,517,317 | $124,329,624 | +$34,812,307 | +38.89% | |
| First Trust Advisors Lp | 0.05% | 634,219 | $86,532,840 | $120,184,501 | +$33,651,661 | +38.89% | |
| Norges Bank | 0.01% | 575,226 | $78,483,835 | $109,005,327 | +$30,521,492 | +38.89% | |
| Voya Investment Management Llc | 0.06% | 549,203 | $74,933,257 | $104,073,969 | +$29,140,712 | +38.89% | |
| Morgan Stanley | 0.00% | 543,242 | $74,120,160 | $102,944,359 | +$28,824,199 | +38.89% | |
| Charles Schwab Investment Management Inc | 0.01% | 481,744 | $65,729,151 | $91,290,488 | +$25,561,337 | +38.89% | |
| Timessquare Capital Management, Llc | 0.90% | 446,964 | $60,983,768 | $84,699,678 | +$23,715,910 | +38.89% | |
| Northern Trust Corp | 0.01% | 444,146 | $60,599,279 | $84,165,667 | +$23,566,388 | +38.89% | |
| Thrivent Financial For Lutherans | 0.10% | 436,865 | $59,606,000 | $82,785,918 | +$23,179,918 | +38.89% | |
| Jpmorgan Chase & Co | 0.00% | 427,770 | $58,946,031 | $81,062,415 | +$22,116,384 | +37.52% | |
| Bank Of America Corp | 0.00% | 426,291 | $58,163,143 | $80,782,145 | +$22,619,002 | +38.89% | |
| Vestal Point Capital, Lp | 1.28% | 400,000 | $54,576,000 | $75,800,000 | +$21,224,000 | +38.89% | |
| Impax Asset Management Group Plc | 0.35% | 396,513 | $54,100,234 | $75,139,214 | +$21,038,980 | +38.89% | |
| Citadel Advisors Llc | 0.03% | 376,309 | $51,343,600 | $71,310,556 | +$19,966,956 | +38.89% | |
| Sei Investments Co | 0.04% | 373,307 | $50,934,778 | $70,741,677 | +$19,806,899 | +38.89% | |
| American Capital Management Inc | 2.21% | 361,055 | $49,262,344 | $68,419,923 | +$19,157,579 | +38.89% | |
| Bnp Paribas Asset Management Holding S.A. | 0.05% | 356,942 | $48,701,166 | $67,640,509 | +$18,939,343 | +38.89% | |
| Df Dent & Co Inc | 0.92% | 356,854 | $48,689,109 | $67,623,833 | +$18,934,724 | +38.89% | |
| Balyasny Asset Management L.P. | 0.09% | 355,507 | $48,505,375 | $67,368,577 | +$18,863,202 | +38.89% | |
| Vanguard Fiduciary Trust Co | 0.01% | 336,295 | $45,884,090 | $63,727,903 | +$17,843,813 | +38.89% | |
| Granahan Investment Management, Llc | 1.62% | 332,271 | $45,335,055 | $62,965,355 | +$17,630,300 | +38.89% | |
| Primecap Management Co/Ca/ | 0.03% | 323,268 | $44,106,686 | $61,259,286 | +$17,152,600 | +38.89% |
Frequently asked questions about RGEN
Who are the largest institutional holders of RGEN?
The largest institutional holders of RGEN reported in the latest SEC Form 13F filings include Blackrock, Inc., Fmr Llc, United Capital Financial Advisors, Llc, Vanguard Capital Management Llc, and Vanguard Portfolio Management Llc. InsiderSet ranks institutional holders by their latest reported RGEN position.
What is RGEN institutional ownership?
This page tracks RGEN positions reported by institutional investment managers through SEC Form 13F. REPLIGEN CORP (RGEN) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own RGEN?
InsiderSet currently tracks 467 institutional managers reporting RGEN holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of RGEN shareholders.
How much RGEN stock do institutions own?
Institutional investment managers disclosed approximately $8.87B in RGEN holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was RGEN institutional ownership last updated?
The latest RGEN institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional RGEN holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its RGEN position after the reporting date.
Are institutions buying or selling RGEN?
Institutional buying and selling can be analyzed by comparing RGEN positions across consecutive 13F reporting periods. InsiderSet's RGEN Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View RGEN ownership changes.
How has RGEN institutional ownership changed over time?
InsiderSet tracks RGEN institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.