Repligen
RGEN
445 hedge funds and large institutions have $7.75B invested in Repligen in 2026 Q1 according to their latest regulatory filings, with 70 funds opening new positions, 165 increasing their positions, 131 reducing their positions, and 92 closing their positions.
26% more repeat investments, than reductions
Existing positions increased: 165 | Existing positions reduced: 131
5.25% more ownership
Funds ownership: 110.91% → 116.16% (+5.3%)
6% less funds holding
Funds holding: 474 → 445 (-29)
24% less first-time investments, than exits
New positions opened: 70 | Existing positions closed: 92
24% less capital invested
Capital invested by funds: $10.2B → $7.75B (-$2.48B)
25% less funds holding in top 10
Funds holding in top 10: 8 → 6 (-2)
46% less call options, than puts
Call options by funds: $24.5M | Put options by funds: $45.7M
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
MC
Maverick Capital
Dallas,
Texas
|
+$212M |
| 2 |
WA
Wasatch Advisors
Salt Lake City,
Utah
|
+$174M |
| 3 |
VPC
Vestal Point Capital
New York
|
+$118M |
| 4 |
T. Rowe Price Investment Management
Baltimore,
Maryland
|
+$101M |
| 5 |
Ameriprise
Minneapolis,
Minnesota
|
+$60.2M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Millennium Management
New York
|
-$87.7M |
| 2 |
BlackRock
New York
|
-$87.5M |
| 3 |
Marshall Wace
London,
United Kingdom
|
-$84.6M |
| 4 |
Walleye Capital
New York
|
-$68.3M |
| 5 |
FAM
Fred Alger Management
New York
|
-$66.6M |
RGEN Hedge Fund Activity: Q1 2026 in Review
445 of the 8,191 institutional investors tracked by Wall St. Rank reported a position in Repligen (RGEN) for Q1 2026, worth a combined $7.75B — down 24% from $10.2B a quarter earlier.
Sellers outnumbered buyers: 92 funds closed out of RGEN and 70 opened new positions — a net loss of 22 holders — while 131 trimmed existing stakes and 165 added.
The largest buyer was Maverick Capital, opening a new position worth an estimated $212M. The largest seller was Millennium Management, cutting an estimated $87.7M.
- 445 institutional investors held Repligen (RGEN) as of Q1 2026, down from 474 in Q4 2025.
- Funds reported $7.75B of Repligen stock for Q1 2026, down 24% quarter-over-quarter.
- 70 funds opened new Repligen positions in Q1 2026 and 92 closed out, a net change of -22 holders.
- The largest Repligen buyer in Q1 2026 was Maverick Capital, an estimated $212M added.
- The largest Repligen seller in Q1 2026 was Millennium Management, an estimated $87.7M sold.
Based on aggregated 13F filings for Q1 2026.