Walleye Trading
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Walleye Trading’s Repligen RGEN Stock Holding History

Walleye 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 		– Sell
-18
Closed -$2.95K – 4603
2025
Q4 		$2.95K Sell
18
-943
-98% -$148K ﹤0.01% 4217
2025
Q3 		$128K Buy
961
+274
+40% +$33.3K ﹤0.01% 3605
2025
Q2 		$85.4K Sell
687
-381
-36% -$48.5K ﹤0.01% 3657
2025
Q1 		$136K Sell
1,068
-7,613
-88% -$1.17M ﹤0.01% 3262
2024
Q4 		$1.25M Buy
8,681
+4,812
+124% +$690K ﹤0.01% 2012
2024
Q3 		$576K Sell
3,869
-4,077
-51% -$585K ﹤0.01% 2436
2024
Q2 		$1M Buy
+7,946
New +$1.25M ﹤0.01% 2073
2024
Q1 		– Sell
-10,334
Closed -$1.97M – 5240
2023
Q4 		$1.86M Buy
10,334
+5,145
+99% +$801K ﹤0.01% 1982
2023
Q3 		$825K Sell
5,189
-3,634
-41% -$594K ﹤0.01% 2533
2023
Q2 		$1.25M Buy
+8,823
New +$1.41M ﹤0.01% 1988
2021
Q3 		– Sell
-3,172
Closed -$814K – 5621
2021
Q2 		$633K Buy
+3,172
New +$615K ﹤0.01% 2635
2021
Q1 		– Sell
-1,098
Closed -$225K – 5213
2020
Q4 		$210K Buy
1,098
+751
+216% +$137K ﹤0.01% 3469
2020
Q3 		$51K Buy
+347
New +$49.6K ﹤0.01% 3627
2020
Q1 		– Sell
-1,194
Closed -$110K – 4454
2019
Q4 		$110K Buy
+1,194
New +$100K ﹤0.01% 3516
2019
Q2 		– Sell
-2,078
Closed -$142K – 4414
2019
Q1 		$123K Sell
2,078
-3,372
-62% -$194K ﹤0.01% 3345
2018
Q4 		$287K Buy
5,450
+2,586
+90% +$152K ﹤0.01% 3023
2018
Q3 		$159K Buy
+2,864
New +$148K ﹤0.01% 3916
2016
Q1 		– Sell
-29
Closed -$1K – 5752
2015
Q4 		$1K Sell
29
-1,571
-98% -$45.3K ﹤0.01% 5161
2015
Q3 		$45K Buy
1,600
+1,500
+1,500% +$54.2K ﹤0.01% 3582
2015
Q2 		$4K Buy
+100
New +$3.66K ﹤0.01% 4557

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

Walleye Trading's RGEN Position: Q1 2026 in Review

Walleye Trading sold out of Repligen (RGEN) in Q1 2026, closing a stake of 18 shares — an estimated $2.95K sold.

Walleye Trading first reported a position in RGEN in Q2 2015 and held it in 20 quarters. The position peaked at $1.86M in Q4 2023. 441 funds tracked by Wall St. Rank hold RGEN as of Q1 2026.

  • Walleye Trading reported no remaining Repligen position as of Q1 2026 after selling out during the quarter.
  • Walleye Trading sold 18 Repligen shares in Q1 2026, an estimated $2.95K.
  • Walleye Trading first reported a position in Repligen in Q2 2015 and held it in 20 quarters.
  • Walleye Trading's Repligen position peaked at $1.86M in Q4 2023.
  • 441 funds tracked by Wall St. Rank held Repligen as of Q1 2026.

Based on Walleye Trading's 13F filing for Q1 2026, filed 11 May 2026.