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Aigen Investment Management’s Regeneron Pharmaceuticals REGN Stock Holding History

Aigen Investment Management’s Portfolio REGN Stock Details REGN Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q4 		– Sell
-5,535
Closed -$3.11M – 906
2025
Q3 		$3.11M Sell
5,535
-2,931
-35% -$1.66M 0.48% 27
2025
Q2 		$4.44M Buy
8,466
+5,807
+218% +$3.24M 0.61% 20
2025
Q1 		$1.69M Sell
2,659
-3,708
-58% -$2.55M 0.27% 109
2024
Q4 		$4.54M Buy
6,367
+5,644
+781% +$4.74M 0.8% 8
2024
Q3 		$760K Buy
+723
New +$805K 0.15% 205
2024
Q2 		– Sell
-523
Closed -$503K – 976
2024
Q1 		$503K Sell
523
-134
-20% -$127K 0.11% 278
2023
Q4 		$577K Buy
+657
New +$541K 0.1% 288
2022
Q2 		– Sell
-1,206
Closed -$842K – 694
2022
Q1 		$842K Sell
1,206
-5,977
-83% -$3.78M 0.15% 192
2021
Q4 		$4.5M Buy
7,183
+335
+5% +$206K 0.28% 88
2021
Q3 		$4.14M Sell
6,848
-3,771
-36% -$2.34M 0.8% 28
2021
Q2 		$5.93M Buy
+10,619
New +$5.38M 1.03% 19
2021
Q1 		– Sell
-1,494
Closed -$722K – 839
2020
Q4 		$722K Buy
+1,494
New +$806K 0.09% 287
2020
Q2 		– Sell
-10
Closed -$5K – 1206
2020
Q1 		$5K Buy
+10
New +$4.13K ﹤0.01% 1168

Other funds holding REGN

Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Dodge & Cox
Dodge & Cox San Francisco, California $182B AUM 14.68% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
Franklin Resources
Franklin Resources San Mateo, California $408B AUM 30.18% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
N
Nuveen Charlotte, North Carolina $369B AUM 31.66% 1-Year Est. Return

Aigen Investment Management's REGN Position: Q4 2025 in Review

Aigen Investment Management sold out of Regeneron Pharmaceuticals (REGN) in Q4 2025, closing a stake of 5,535 shares — an estimated $3.11M sold.

Aigen Investment Management first reported a position in REGN in Q1 2020 and held it in 13 quarters. The position peaked at $5.93M in Q2 2021. 1,385 funds tracked by Wall St. Rank hold REGN as of Q4 2025.

  • Aigen Investment Management reported no remaining Regeneron Pharmaceuticals position as of Q4 2025 after selling out during the quarter.
  • Aigen Investment Management sold 5,535 Regeneron Pharmaceuticals shares in Q4 2025, an estimated $3.11M.
  • Aigen Investment Management first reported a position in Regeneron Pharmaceuticals in Q1 2020 and held it in 13 quarters.
  • Aigen Investment Management's Regeneron Pharmaceuticals position peaked at $5.93M in Q2 2021.
  • 1,385 funds tracked by Wall St. Rank held Regeneron Pharmaceuticals as of Q4 2025.

Based on Aigen Investment Management's 13F filing for Q4 2025, filed 13 Feb 2026.