Millennium Management
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Millennium Management’s Repligen RGEN Stock Holding History

Millennium 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
Q1 		– Sell
-10,100
Closed -$1.65M – 6274
2025
Q4 		$1.65M Sell
10,100
-65,000
-87% -$10.2M ﹤0.01% 4101
2025
Q3 		$10M Buy
+75,100
New +$9.12M ﹤0.01% 2379
2024
Q4 		– Sell
-53,600
Closed -$7.98M – 6387
2024
Q3 		$7.98M Buy
53,600
+3,100
+6% +$445K ﹤0.01% 2401
2024
Q2 		$6.37M Buy
+50,500
New +$7.92M ﹤0.01% 2492
2023
Q3 		– Sell
-5,200
Closed -$736K – 6488
2023
Q2 		$736K Sell
5,200
-14,800
-74% -$2.37M ﹤0.01% 4269
2023
Q1 		$3.37M Sell
20,000
-66,000
-77% -$11.8M ﹤0.01% 2958
2022
Q4 		$14.6M Buy
+86,000
New +$15.6M 0.01% 1741
2022
Q3 		– Sell
-32,000
Closed -$5.2M – 7420
2022
Q2 		$5.2M Buy
+32,000
New +$5.06M ﹤0.01% 2767

Other funds holding RGEN

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
UCFA
United Capital Financial Advisors Irving, Texas $16.3B AUM 16.34% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Bank of New York Mellon
Bank of New York Mellon New York $544B AUM 28.31% 1-Year Est. Return
MC
Maverick Capital Dallas, Texas $8.67B AUM 48.76% 1-Year Est. Return
Massachusetts Financial Services
Massachusetts Financial Services Boston, Massachusetts $298B AUM 21.96% 1-Year Est. Return

Millennium Management's RGEN Position: Q1 2026 in Review

Millennium Management reduced its Repligen (RGEN) stake by 97% in Q1 2026, selling an estimated $87.7M and leaving 22,461 shares worth $2.65M. The position accounts for ﹤0.01% of the portfolio, ranked #3601.

Millennium Management first reported a position in RGEN in Q2 2013 and has held it in 43 quarters since. The position peaked at $109M in Q3 2025. 441 funds tracked by Wall St. Rank hold RGEN as of Q1 2026.

  • Millennium Management held 22,461 shares of Repligen worth $2.65M as of Q1 2026.
  • Millennium Management sold 628,085 Repligen shares in Q1 2026, an estimated $87.7M.
  • Repligen made up ﹤0.01% of Millennium Management's portfolio in Q1 2026, its #3601 holding.
  • Millennium Management first reported a position in Repligen in Q2 2013 and has held it in 43 quarters since.
  • Millennium Management's Repligen position peaked at $109M in Q3 2025.
  • 441 funds tracked by Wall St. Rank held Repligen as of Q1 2026.

Based on Millennium Management's 13F filing for Q1 2026, filed 15 May 2026.