Hudson Bay Capital Management
RGEN icon

Hudson Bay Capital Management’s Repligen RGEN Stock Holding History

Hudson Bay Capital Management’s Portfolio RGEN Stock Details RGEN Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$8.19M Sell
60,000
-32,500
-35% -$3.99M 0.02% 415
2026
Q1 		$10.9M Buy
92,500
+72,500
+363% +$10.1M 0.04% 297
2025
Q4 		$3.28M Sell
20,000
-1,003
-5% -$157K 0.01% 607
2025
Q3 		$2.81M Buy
+21,003
New +$2.55M 0.01% 694
2024
Q4 		– Sell
-40,000
Closed -$5.95M – 1080
2024
Q3 		$5.95M Sell
40,000
-15,000
-27% -$2.15M 0.02% 383
2024
Q2 		$6.93M Buy
+55,000
New +$8.62M 0.03% 317
2023
Q3 		– Sell
-20,000
Closed -$2.83M – 933
2023
Q2 		$2.83M Buy
+20,000
New +$3.21M 0.02% 437
2023
Q1 		– Sell
-27,500
Closed -$4.66M – 971
2022
Q4 		$4.66M Buy
+27,500
New +$4.99M 0.05% 375
2022
Q3 		– Sell
-32,500
Closed -$5.28M – 1342
2022
Q2 		$5.28M Buy
32,500
+5,000
+18% +$791K 0.04% 403
2022
Q1 		$5.17M Buy
+27,500
New +$5.22M 0.07% 349

Other funds holding RGEN

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
UCFA
United Capital Financial Advisors Irving, Texas $18.2B AUM 22.02% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
MC
Maverick Capital Dallas, Texas $11.3B AUM 76.6% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return
Massachusetts Financial Services
Massachusetts Financial Services Boston, Massachusetts $315B AUM 27.84% 1-Year Est. Return
WA
Wasatch Advisors Salt Lake City, Utah $15.3B AUM 25.06% 1-Year Est. Return

Hudson Bay Capital Management's RGEN Position: Q2 2026 in Review

Hudson Bay Capital Management reduced its Repligen (RGEN) stake by 35% in Q2 2026, selling an estimated $3.99M and leaving 60,000 shares worth $8.19M. The position accounts for 0.02% of the portfolio, ranked #415.

Hudson Bay Capital Management first reported a position in RGEN in Q1 2022 and has held it in 10 quarters since. The position peaked at $10.9M in Q1 2026. 482 funds tracked by Wall St. Rank hold RGEN as of Q2 2026.

  • Hudson Bay Capital Management held 60,000 shares of Repligen worth $8.19M as of Q2 2026.
  • Hudson Bay Capital Management sold 32,500 Repligen shares in Q2 2026, an estimated $3.99M.
  • Repligen made up 0.02% of Hudson Bay Capital Management's portfolio in Q2 2026, its #415 holding.
  • Hudson Bay Capital Management first reported a position in Repligen in Q1 2022 and has held it in 10 quarters since.
  • Hudson Bay Capital Management's Repligen position peaked at $10.9M in Q1 2026.
  • 482 funds tracked by Wall St. Rank held Repligen as of Q2 2026.

Based on Hudson Bay Capital Management's 13F filing for Q2 2026, filed 14 Aug 2026.