TIM
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Tortoise Investment Management’s Regeneron Pharmaceuticals REGN Stock Holding History

Tortoise 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
-29
Closed -$16.3K – 1166
2025
Q3 		$16.3K Buy
29
+5
+21% +$2.83K ﹤0.01% 553
2025
Q2 		$12.6K Sell
24
-50
-68% -$27.9K ﹤0.01% 571
2025
Q1 		$46.9K Sell
74
-77
-51% -$53K ﹤0.01% 383
2024
Q4 		$108K Buy
151
+1
+0.7% +$839 0.01% 298
2024
Q3 		$158K Hold
150
– – 0.02% 255
2024
Q2 		$158K Hold
150
– – 0.02% 249
2024
Q1 		$144K Hold
150
– – 0.02% 253
2023
Q4 		$132K Hold
150
– – 0.02% 248
2023
Q3 		$123K Sell
150
-25
-14% -$19.6K 0.02% 249
2023
Q2 		$126K Hold
175
– – 0.02% 254
2023
Q1 		$144K Hold
175
– – 0.02% 221
2022
Q4 		$126K Hold
175
– – 0.02% 234
2022
Q3 		$121K Hold
175
– – 0.02% 228
2022
Q2 		$103K Buy
175
+55
+46% +$35.8K 0.02% 224
2022
Q1 		$84K Hold
120
– – 0.02% 244
2021
Q4 		$76K Hold
120
– – 0.01% 243
2021
Q3 		$73K Buy
120
+100
+500% +$62.1K 0.01% 234
2021
Q2 		$11K Hold
20
– – ﹤0.01% 459
2021
Q1 		$9K Hold
20
– – ﹤0.01% 455
2020
Q4 		$10K Hold
20
– – ﹤0.01% 419
2020
Q3 		$11K Hold
20
– – ﹤0.01% 373
2020
Q2 		$12K Hold
20
– – ﹤0.01% 350
2020
Q1 		$10K Buy
+20
New +$8.25K ﹤0.01% 368
2019
Q2 		– Sell
-12
Closed -$5K – 648
2019
Q1 		$5K Buy
+12
New +$4.94K ﹤0.01% 485
2017
Q2 		– Sell
-11
Closed -$4K – 512
2017
Q1 		$4K Buy
+11
New +$4.08K ﹤0.01% 406

Other funds holding REGN

Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Dodge & Cox
Dodge & Cox San Francisco, California $191B AUM 17.5% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
Franklin Resources
Franklin Resources San Mateo, California $462B AUM 39.16% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Nuveen
Nuveen Charlotte, North Carolina $419B AUM 43.02% 1-Year Est. Return

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

Tortoise Investment Management sold out of Regeneron Pharmaceuticals (REGN) in Q4 2025, closing a stake of 29 shares — an estimated $16.3K sold.

Tortoise Investment Management first reported a position in REGN in Q1 2017 and held it in 25 quarters. The position peaked at $158K in Q3 2024. 1,388 funds tracked by Wall St. Rank hold REGN as of Q4 2025.

  • Tortoise Investment Management reported no remaining Regeneron Pharmaceuticals position as of Q4 2025 after selling out during the quarter.
  • Tortoise Investment Management sold 29 Regeneron Pharmaceuticals shares in Q4 2025, an estimated $16.3K.
  • Tortoise Investment Management first reported a position in Regeneron Pharmaceuticals in Q1 2017 and held it in 25 quarters.
  • Tortoise Investment Management's Regeneron Pharmaceuticals position peaked at $158K in Q3 2024.
  • 1,388 funds tracked by Wall St. Rank held Regeneron Pharmaceuticals as of Q4 2025.

Based on Tortoise Investment Management's 13F filing for Q4 2025, filed 6 Feb 2026.