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David Shaw’s Repligen RGEN Stock Holding History

David Shaw’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 		– Sell
-26,300
Closed -$3.1M – 5151
2026
Q1 		$3.1M Hold
26,300
– – ﹤0.01% 2566
2025
Q4 		$4.31M Buy
26,300
+12,500
+91% +$1.96M ﹤0.01% 2436
2025
Q3 		$1.84M Buy
+13,800
New +$1.68M ﹤0.01% 3039
2023
Q4 		– Sell
-10,500
Closed -$1.67M – 4560
2023
Q3 		$1.67M Buy
10,500
+500
+5% +$81.7K ﹤0.01% 2714
2023
Q2 		$1.41M Sell
10,000
-800
-7% -$128K ﹤0.01% 2872
2023
Q1 		$1.82M Sell
10,800
-1,600
-13% -$285K ﹤0.01% 2757
2022
Q4 		$2.1M Sell
12,400
-8,000
-39% -$1.45M ﹤0.01% 2905
2022
Q3 		$3.82M Buy
20,400
+11,100
+119% +$2.34M ﹤0.01% 2381
2022
Q2 		$1.51M Sell
9,300
-4,800
-34% -$759K ﹤0.01% 3315
2022
Q1 		$2.65M Sell
14,100
-9,500
-40% -$1.8M ﹤0.01% 3021
2021
Q4 		$6.25M Buy
23,600
+10,500
+80% +$2.83M 0.01% 2137
2021
Q3 		$3.79M Buy
+13,100
New +$3.36M ﹤0.01% 2388
2021
Q2 		– Sell
-10,000
Closed -$1.94M – 4974
2021
Q1 		$1.94M Buy
+10,000
New +$2.05M ﹤0.01% 2614
2020
Q1 		– Sell
-23,500
Closed -$2.17M – 4195
2019
Q4 		$2.17M Hold
23,500
– – ﹤0.01% 2401
2019
Q3 		$1.8M Buy
+23,500
New +$2.06M ﹤0.01% 2435
2015
Q1 		– Sell
-31,600
Closed -$626K – 3935
2014
Q4 		$626K Sell
31,600
-64,100
-67% -$1.43M ﹤0.01% 3169
2014
Q3 		$1.91M Buy
95,700
+19,900
+26% +$419K ﹤0.01% 2288
2014
Q2 		$1.73M Buy
75,800
+1,500
+2% +$26.7K ﹤0.01% 2429
2014
Q1 		$955K Buy
74,300
+63,200
+569% +$906K ﹤0.01% 3068
2013
Q4 		$151K Buy
+11,100
New +$133K ﹤0.01% 4323

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

David Shaw's RGEN Position: Q2 2026 in Review

David Shaw opened a new position in Repligen (RGEN) in Q2 2026: 83,328 shares worth $11.4M. The stake represents 0.01% of the portfolio and ranks #1706 among its holdings. This is a return to the name: David Shaw previously reported a position in RGEN as recently as Q3 2025.

David Shaw first reported a position in RGEN in Q3 2013 and has held it in 38 quarters since. The position peaked at $33.4M in Q3 2025. 476 funds tracked by Wall St. Rank hold RGEN as of Q2 2026.

  • David Shaw held 83,328 shares of Repligen worth $11.4M as of Q2 2026.
  • Repligen was a new David Shaw position in Q2 2026.
  • Repligen made up 0.01% of David Shaw's portfolio in Q2 2026, its #1706 holding.
  • David Shaw first reported a position in Repligen in Q3 2013 and has held it in 38 quarters since.
  • David Shaw's Repligen position peaked at $33.4M in Q3 2025.
  • 476 funds tracked by Wall St. Rank held Repligen as of Q2 2026.

Based on D.E. Shaw & Co's 13F filing for Q2 2026, filed 14 Aug 2026.