Ranked by reported Q2 2026 13F market value
Share of total reported institutional value in RGEN held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 5.4M | $734.7M | -10.2% | 9.542% | 0.01% |
| 2 | FMR LLC | 3.3M | $453.9M | +15.2% | 5.895% | 0.02% |
| 3 | UNITED CAPITAL FINANCIAL ADVISORS, LLC | 2.8M | $380.8M | +0.6% | 4.945% | 2.10% |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 2.4M | $329.0M | +0.6% | 4.272% | 0.01% |
| 5 | VANGUARD PORTFOLIO MANAGEMENT LLC | 2.3M | $315.6M | +0.3% | 4.098% | 0.01% |
| 6 | MAVERICK CAPITAL LTD | 2.0M | $270.8M | +30.7% | 3.517% | 2.39% |
| 7 | STATE STREET CORP | 1.8M | $245.7M | +1.3% | 3.190% | 0.00% |
| 8 | MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 1.6M | $220.6M | +15.7% | 2.865% | 0.07% |
| 9 | WASATCH ADVISORS LP | 1.6M | $217.0M | +27.9% | 2.818% | 1.42% |
| 10 | AMERIPRISE FINANCIAL INC | 1.6M | $215.0M | +70.3% | 2.793% | 0.04% |
| 11 | Bank of New York Mellon Corp | 1.5M | $207.8M | -0.6% | 2.698% | 0.03% |
| 12 | Invesco Ltd. | 1.4M | $189.3M | +8.5% | 2.458% | 0.01% |
| 13 | Holocene Advisors, LP | 1.3M | $176.3M | +82.3% | 2.290% | 0.40% |
| 14 | RTW INVESTMENTS, LP | 1.2M | $169.3M | +2.9% | 2.198% | 1.45% |
| 15 | GEODE CAPITAL MANAGEMENT, LLC | 1.1M | $145.0M | -0.2% | 1.883% | 0.01% |
| 16 | CONGRESS ASSET MANAGEMENT CO | 1.0M | $138.1M | +26.9% | 1.794% | 0.85% |
| 17 | Conestoga Capital Advisors, LLC | 981K | $133.8M | -10.6% | 1.738% | 2.91% |
| 18 | GOLDMAN SACHS GROUP INC | 965K | $131.7M | +48.2% | 1.711% | 0.01% |
| 19 | DIMENSIONAL FUND ADVISORS LP | 950K | $129.6M | +11.1% | 1.683% | 0.02% |
| 20 | Stephens Investment Management Group LLC | 937K | $127.9M | +24.0% | 1.660% | 1.37% |
| 21 | FRANKLIN RESOURCES INC | 890K | $121.5M | -25.4% | 1.577% | 0.03% |
| 22 | UBS Group AG | 795K | $108.5M | +18.6% | 1.409% | 0.01% |
| 23 | WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | 789K | $107.6M | — | 1.397% | 0.32% |
| 24 | BAMCO INC /NY/ | 748K | $102.1M | +36.5% | 1.326% | 0.15% |
| 25 | FRED ALGER MANAGEMENT, LLC | 734K | $100.1M | +68.8% | 1.300% | 0.33% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in RGEN — a direct measure of their conviction.
Filings activity in RGEN during Q2 2026, grouped by how each filer changed its position.
Institutions that opened a new RGEN position in Q2 2026
Institutions that fully closed their RGEN position in Q2 2026
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q2 2026 | 485 | +9.2% | 118.37% | +1.40 pp | $8.52B | +22% |
| Q1 2026 | 444 | 5.3% | 116.97% | +5.85 pp | $6.96B | 25% |
| Q4 2025 | 469 | +5.9% | 111.12% | +3.18 pp | $9.25B | +25% |
| Q3 2025 | 443 | +1.1% | 107.94% | +5.43 pp | $7.39B | +25% |
| Q2 2025 | 438 | +0.5% | 102.51% | +2.18 pp | $5.91B | 4.0% |
| Q1 2025 | 436 | +3.3% | 100.33% | +1.04 pp | $6.16B | 5.8% |
| Q4 2024 | 422 | 2.3% | 99.29% | +1.46 pp | $6.54B | 4.4% |
| Q3 2024 | 432 | — | 97.83% | — | $6.85B | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying RGEN stock.
Based on Q2 2026 13F filings, institutional ownership of Repligen Corporation stands at 118.4%, held across 485 reporting institutions.
BlackRock, Inc. is the largest reported institutional holder of RGEN, with approximately 5,384,938 shares worth $0.73B as of Q2 2026.
No marquee "smart money" managers (Berkshire, Burry, ARK, Tiger Global, Pershing Square, Baupost, etc.) currently appear among the top 25 institutional holders of RGEN.
Our composite Smart Money Score for RGEN is 55 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
90 institutions opened new positions in RGEN during Q2 2026, while 55 fully exited. 306 added to existing positions and 74 trimmed.
RGEN institutional ownership rose by 1.40 percentage points quarter-over-quarter, with a net change of +41 holders.
The top 10 institutions account for 39.7% of all reported 13F value in RGEN, and the top 25 account for 64.2%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Repligen Corporation (RGEN) Institutional Ownership