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 Hold
900
– – ﹤0.01% 5013
2025
Q4 		$147K Sell
900
-700
-44% -$110K ﹤0.01% 4553
2025
Q3 		$213K Buy
1,600
+400
+33% +$48.6K ﹤0.01% 4871
2025
Q2 		$149K Sell
1,200
-2,900
-71% -$369K ﹤0.01% 4811
2025
Q1 		$521K Sell
4,100
-5,500
-57% -$847K ﹤0.01% 3358
2024
Q4 		$1.38M Buy
9,600
+700
+8% +$100K ﹤0.01% 2541
2024
Q3 		$1.32M Sell
8,900
-8,000
-47% -$1.15M ﹤0.01% 2653
2024
Q2 		$2.13M Sell
16,900
-11,000
-39% -$1.72M ﹤0.01% 2141
2024
Q1 		$5.13M Sell
27,900
-39,100
-58% -$7.45M ﹤0.01% 1590
2023
Q4 		$12M Buy
67,000
+65,300
+3,841% +$10.2M 0.01% 973
2023
Q3 		$270K Sell
1,700
-4,000
-70% -$654K ﹤0.01% 4040
2023
Q2 		$806K Sell
5,700
-5,800
-50% -$930K ﹤0.01% 2812
2023
Q1 		$1.94M Sell
11,500
-25,500
-69% -$4.55M ﹤0.01% 1974
2022
Q4 		$6.26M Buy
37,000
+31,700
+598% +$5.75M 0.01% 1095
2022
Q3 		$991K Buy
5,300
+2,700
+104% +$569K ﹤0.01% 2645
2022
Q2 		$422K Sell
2,600
-6,900
-73% -$1.09M ﹤0.01% 3658
2022
Q1 		$1.79M Buy
9,500
+5,500
+138% +$1.04M ﹤0.01% 2227
2021
Q4 		$1.06M Buy
4,000
+1,900
+90% +$512K ﹤0.01% 2783
2021
Q3 		$419K Hold
2,100
– – ﹤0.01% 4365
2021
Q2 		$419K Buy
+2,100
New +$407K ﹤0.01% 4435
2021
Q1 		– Sell
-36
Closed -$689K – 9835
2020
Q4 		$689K Sell
36
-32
-47% -$5.82K ﹤0.01% 3034
2020
Q3 		$1M Buy
68
+49
+258% +$7K ﹤0.01% 2229
2020
Q2 		$234K Sell
19
-157
-89% -$18.5K ﹤0.01% 3826
2020
Q1 		$1.7M Sell
176
-86
-33% -$8.3K ﹤0.01% 1408
2019
Q4 		$2.42M Sell
262
-99
-27% -$8.32K 0.01% 1316
2019
Q3 		$2.77M Sell
361
-87
-19% -$7.61K 0.01% 1077
2019
Q2 		$3.85M Buy
448
+209
+87% +$14.2K 0.01% 836
2019
Q1 		$1.41M Buy
239
+159
+199% +$9.14K ﹤0.01% 1686
2018
Q4 		$421K Sell
80
-245
-75% -$14.4K ﹤0.01% 2392
2018
Q3 		$1.8M Buy
325
+18
+6% +$928 0.01% 1330
2018
Q2 		$1.44M Buy
307
+234
+321% +$9.63K 0.01% 1429
2018
Q1 		$7K Sell
73
-238
-77% -$8.37K ﹤0.01% 4360
2017
Q4 		$10K Buy
311
+59
+23% +$2.14K ﹤0.01% 3907
2017
Q3 		$8K Sell
252
-5
-2% -$210 ﹤0.01% 4008
2017
Q2 		$29K Buy
257
+223
+656% +$8.47K ﹤0.01% 2926
2017
Q1 		$5K Sell
34
-69
-67% -$2.19K ﹤0.01% 4617
2016
Q4 		$21K Sell
103
-50
-33% -$1.55K ﹤0.01% 3001
2016
Q3 		$33K Sell
153
-85
-36% -$2.56K ﹤0.01% 2497
2016
Q2 		$33K Buy
238
+107
+82% +$2.74K ﹤0.01% 2438
2016
Q1 		$13K Buy
131
+97
+285% +$2.37K ﹤0.01% 3228
2015
Q4 		$5K Buy
+34
New +$981 ﹤0.01% 3893
2015
Q3 		– Sell
-20
Closed -$18K – 6071
2015
Q2 		$18K Buy
20
+9
+82% +$330 ﹤0.01% 2564
2015
Q1 		$4K Sell
11
-4
-27% -$104 ﹤0.01% 3697
2014
Q4 		$2K Buy
+15
New +$335 ﹤0.01% 3803

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.