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RGEN · Repligen Corp · Holdings

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Market Cap
$9.46B
Shares
56.44M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 487
Total Value: $9,114,422,037
Total Shares: 66,809,512
Showing 1–100 of 497 holdings by value · page 1 of 5

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 487 13F filers · Δ vs Mar 31, 2026
Top Holder
8.1%
Sep 2023 → Jun 2026 · range 8.1% – 13.7%
−1.0 pts
Top 5
24.3%
Sep 2023 → Jun 2026 · range 24.3% – 39.2%
−4.4 pts
Top 10
37.4%
Sep 2023 → Jun 2026 · range 37.4% – 50.6%
−4.2 pts
HHI
230
Sep 2023 → Jun 2026 · range 230 – 465
Broadly held−47

Quarterly Activity

vs Mar 31, 2026
New
99
Increased
178
Decreased
143
Sold Out
60
Unchanged
67
Holder count: +39
Institutional value: +17.2%
Shares held: +1.2%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 497
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 730272 CUSIP 759916109 13F (30d) 277 filings 275 filers Visit website Investor relations