Simplex Trading
RGEN icon

Simplex Trading’s Repligen RGEN Stock Holding History

Simplex Trading’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 		$106K Buy
+903
New +$126K ﹤0.01% 5009
2025
Q4 		– Sell
-2,943
Closed -$461K – 9827
2025
Q3 		$393K Buy
+2,943
New +$357K ﹤0.01% 4130
2025
Q2 		– Sell
-3,504
Closed -$446K – 9571
2025
Q1 		$445K Buy
3,504
+223
+7% +$34.3K ﹤0.01% 3513
2024
Q4 		$472K Sell
3,281
-876
-21% -$126K ﹤0.01% 3607
2024
Q3 		$618K Sell
4,157
-2,864
-41% -$411K ﹤0.01% 3364
2024
Q2 		$885K Buy
+7,021
New +$1.1M ﹤0.01% 3046
2023
Q4 		– Sell
-2,433
Closed -$379K – 9662
2023
Q3 		$386K Sell
2,433
-293
-11% -$47.9K ﹤0.01% 3667
2023
Q2 		$385K Buy
+2,726
New +$437K ﹤0.01% 3574
2021
Q1 		– Sell
-2,707
Closed -$555K – 9836
2020
Q4 		$518K Buy
2,707
+2,080
+332% +$378K ﹤0.01% 3377
2020
Q3 		$92K Sell
627
-2,215
-78% -$317K ﹤0.01% 5002
2020
Q2 		$351K Buy
+2,842
New +$334K ﹤0.01% 3334
2019
Q2 		– Sell
-14
Closed -$954 – 7661
2019
Q1 		$0 Sell
14
-4,666
-100% -$268K ﹤0.01% 7725
2018
Q4 		$246K Buy
+4,680
New +$274K ﹤0.01% 2925
2018
Q1 		– Sell
-2,463
Closed -$86.6K – 6741
2017
Q4 		$89K Sell
2,463
-1,222
-33% -$44.2K ﹤0.01% 1901
2017
Q3 		$141K Buy
+3,685
New +$154K 0.01% 1444
2017
Q2 		– Sell
-3,777
Closed -$144K – 6676
2017
Q1 		$132K Buy
+3,777
New +$120K 0.01% 1515
2016
Q3 		– Sell
-5,330
Closed -$161K – 6351
2016
Q2 		$145K Buy
+5,330
New +$136K 0.01% 1207
2015
Q4 		– Sell
-777
Closed -$22.4K – 6014
2015
Q3 		$21K Buy
+777
New +$28.1K ﹤0.01% 2747

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

Simplex Trading's RGEN Position: Q1 2026 in Review

Simplex Trading opened a new position in Repligen (RGEN) in Q1 2026: 903 shares worth $106K. The stake represents ﹤0.01% of the portfolio and ranks #5009 among its holdings. This is a return to the name: Simplex Trading previously reported a position in RGEN as recently as Q3 2025.

Simplex Trading first reported a position in RGEN in Q3 2015 and has held it in 18 quarters since. The position peaked at $885K in Q2 2024. 441 funds tracked by Wall St. Rank hold RGEN as of Q1 2026.

  • Simplex Trading held 903 shares of Repligen worth $106K as of Q1 2026.
  • Repligen was a new Simplex Trading position in Q1 2026.
  • Repligen made up ﹤0.01% of Simplex Trading's portfolio in Q1 2026, its #5009 holding.
  • Simplex Trading first reported a position in Repligen in Q3 2015 and has held it in 18 quarters since.
  • Simplex Trading's Repligen position peaked at $885K in Q2 2024.
  • 441 funds tracked by Wall St. Rank held Repligen as of Q1 2026.

Based on Simplex Trading's 13F filing for Q1 2026, filed 14 May 2026.