13F Insight
DOSSIER · 13F Holders · Q1 2026
RGEN 1 12/15/28

REPLIGEN CORP

55 institutions still hold REPLIGEN CORP as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 759916AD1·55 13F holders·last filed Mar 31, 2026
Market cap
—
13F value held
$630M
visible holders
Holders
55
filers reporting
Concentration
15.65%
BRAIDWELL LP #1
top holder share
AI Holders Summary · Q1 2026

55 institutions reported RGEN 1 12/15/28 in Q1 2026. BRAIDWELL LP leads at 15.7% of the visible book.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
BRAIDWELL LP
CIK 0001920938
$99M101.0M3.29%Q1 202602
DeepCurrents Investment Group LLC
CIK 0001754535
$97M94.4M2.93%Q2 202603
Aequim Alternative Investments LP
CIK 0001728201
$77M75.0M1.20%Q2 202604
FRANKLIN RESOURCES INC
CIK 0000038777
$55M53.2M0.01%Q2 202605
WOLVERINE ASSET MANAGEMENT LLC
CIK 0001279891
$52M51.2M0.46%Q2 202606
TENOR CAPITAL MANAGEMENT Co., L.P.
CIK 0001346554
$35M34.0M0.49%Q2 202607
ZAZOVE ASSOCIATES LLC
CIK 0001009012
$27M26.3M2.21%Q2 202608
Wellesley Asset Management
CIK 0001533551
$25M25.6M2.24%Q2 202609
ADVENT CAPITAL MANAGEMENT /DE/
CIK 0001097278
$24M23.8M0.55%Q2 202610
CAPSTONE INVESTMENT ADVISORS, LLC
CIK 0001426196
$23M22.5M0.04%Q2 202611
STATE STREET CORP
CIK 0000093751
$15M14.9M0.00%Q2 202612
Calamos Advisors LLC
CIK 0001316507
$15M14.3M0.05%Q2 202613
SHENKMAN CAPITAL MANAGEMENT INC
CIK 0001275228
$13M12.5M1.81%Q2 202614
BlackRock, Inc.
CIK 0002012383
$13M12.2M0.00%Q2 202615
JPMORGAN CHASE & CO
CIK 0000019617
$12M12.1M0.00%Q2 202616
BNP PARIBAS FINANCIAL MARKETS
CIK 0001166588
$12M12.0M0.00%Q2 202617
BOUSSARD & GAVAUDAN GESTION SAS
CIK 0001569001
$11M11K0.57%Q2 202618
Lombard Odier Asset Management (Europe) Ltd
CIK 0001535784
$9M8.4M0.36%Q2 202619
FMR LLC
CIK 0000315066
$8M8.1M0.00%Q2 202620
DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main
CIK 0001694217
$8M7.8M0.01%Q2 2026
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