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John Overdeck’s Repligen RGEN Stock Holding History

John Overdeck’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
2022
Q1 		– Sell
-20,800
Closed -$5.51M – 4034
2021
Q4 		$5.51M Buy
20,800
+15,700
+308% +$4.23M 0.01% 1143
2021
Q3 		$1.47M Sell
5,100
-6,100
-54% -$1.56M ﹤0.01% 2259
2021
Q2 		$2.24M Buy
11,200
+10,000
+833% +$1.94M 0.01% 1768
2021
Q1 		$233K Buy
+1,200
New +$246K ﹤0.01% 3527
2020
Q4 		– Sell
-2,500
Closed -$369K – 3686
2020
Q3 		$369K Buy
+2,500
New +$357K ﹤0.01% 2454

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 $3.37T AUM 44.26% 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

John Overdeck's RGEN Position: Q2 2026 in Review

John Overdeck opened a new position in Repligen (RGEN) in Q2 2026: 9,901 shares worth $1.35M. The stake represents ﹤0.01% of the portfolio and ranks #3372 among its holdings. This is a return to the name: John Overdeck previously reported a position in RGEN as recently as Q4 2025.

John Overdeck first reported a position in RGEN in Q2 2013 and has held it in 32 quarters since. The position peaked at $64.9M in Q3 2024. 476 funds tracked by Wall St. Rank hold RGEN as of Q2 2026.

  • John Overdeck held 9,901 shares of Repligen worth $1.35M as of Q2 2026.
  • Repligen was a new John Overdeck position in Q2 2026.
  • Repligen made up ﹤0.01% of John Overdeck's portfolio in Q2 2026, its #3372 holding.
  • John Overdeck first reported a position in Repligen in Q2 2013 and has held it in 32 quarters since.
  • John Overdeck's Repligen position peaked at $64.9M in Q3 2024.
  • 476 funds tracked by Wall St. Rank held Repligen as of Q2 2026.

Based on Two Sigma Investments's 13F filing for Q2 2026, filed 14 Aug 2026.