Simplex Trading
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Simplex Trading’s Regeneron Pharmaceuticals REGN Stock Holding History

Simplex Trading’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
2026
Q1 		$12.7M Sell
16,500
-25,700
-61% -$19.7M 0.01% 596
2025
Q4 		$32.6M Buy
42,200
+12,500
+42% +$8.49M 0.02% 389
2025
Q3 		$16.7M Buy
29,700
+3,700
+14% +$2.09M 0.01% 716
2025
Q2 		$13.7M Buy
26,000
+4,600
+21% +$2.57M 0.01% 698
2025
Q1 		$13.6M Sell
21,400
-1,300
-6% -$894K 0.01% 704
2024
Q4 		$16.2M Sell
22,700
-6,200
-21% -$5.2M 0.01% 752
2024
Q3 		$30.4M Buy
28,900
+10,200
+55% +$11.4M 0.02% 467
2024
Q2 		$19.7M Sell
18,700
-2,700
-13% -$2.62M 0.01% 625
2024
Q1 		$20.6M Sell
21,400
-7,500
-26% -$7.13M 0.01% 677
2023
Q4 		$25.4M Sell
28,900
-4,600
-14% -$3.79M 0.02% 616
2023
Q3 		$27.6M Sell
33,500
-6,600
-16% -$5.19M 0.02% 461
2023
Q2 		$28.8M Sell
40,100
-14,600
-27% -$11.3M 0.02% 429
2023
Q1 		$44.9M Sell
54,700
-2,200
-4% -$1.66M 0.04% 309
2022
Q4 		$41.1M Buy
56,900
+30,300
+114% +$22.4M 0.04% 319
2022
Q3 		$18.3M Buy
26,600
+14,600
+122% +$9.19M 0.02% 541
2022
Q2 		$7.09M Buy
12,000
+6,000
+100% +$3.9M 0.01% 948
2022
Q1 		$4.19M Sell
6,000
-9,600
-62% -$6.07M ﹤0.01% 1406
2021
Q4 		$9.85M Sell
15,600
-17,200
-52% -$10.6M 0.01% 791
2021
Q3 		$18.8M Buy
32,800
+3,100
+10% +$1.92M 0.02% 480
2021
Q2 		$16.6M Buy
+29,700
New +$15M 0.02% 512
2021
Q1 		– Sell
-414
Closed -$20M – 9828
2020
Q4 		$20M Buy
414
+290
+234% +$157K 0.03% 350
2020
Q3 		$6.94M Sell
124
-44
-26% -$26.7K 0.01% 687
2020
Q2 		$10.5M Sell
168
-566
-77% -$321K 0.02% 508
2020
Q1 		$35.8M Sell
734
-28
-4% -$11.6K 0.06% 161
2019
Q4 		$28.6M Buy
762
+126
+20% +$42.4K 0.06% 203
2019
Q3 		$17.6M Sell
636
-54
-8% -$16K 0.05% 261
2019
Q2 		$21.6M Buy
690
+408
+145% +$136K 0.06% 222
2019
Q1 		$11.6M Sell
282
-136
-33% -$56K 0.03% 349
2018
Q4 		$15.6M Buy
418
+110
+36% +$40.3K 0.05% 246
2018
Q3 		$12.4M Sell
308
-79
-20% -$30.1K 0.04% 301
2018
Q2 		$13.4M Sell
387
-7,751
-95% -$2.42M 0.05% 269
2018
Q1 		$3.08M Buy
8,138
+7,011
+622% +$2.44M 0.14% 129
2017
Q4 		$424K Sell
1,127
-71
-6% -$28.8K 0.02% 804
2017
Q3 		$1.87M Buy
1,198
+129
+12% +$61.4K 0.08% 208
2017
Q2 		$3.73M Buy
1,069
+194
+22% +$84.9K 0.16% 98
2017
Q1 		$1.35M Buy
875
+74
+9% +$27.4K 0.06% 294
2016
Q4 		$240K Buy
801
+226
+39% +$85.9K 0.01% 929
2016
Q3 		$418K Sell
575
-118
-17% -$47.3K 0.03% 599
2016
Q2 		$206K Sell
693
-13
-2% -$5.01K 0.01% 972
2016
Q1 		$229K Buy
706
+434
+160% +$179K 0.02% 807
2015
Q4 		$758K Sell
272
-295
-52% -$160K 0.06% 283
2015
Q3 		$1.08M Buy
567
+299
+112% +$161K 0.08% 220
2015
Q2 		$1.16M Sell
268
-8
-3% -$3.9K 0.1% 184
2015
Q1 		$590K Sell
276
-273
-50% -$116K 0.07% 270
2014
Q4 		$2.73M Buy
+549
New +$216K 0.33% 48

Other funds holding REGN

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
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
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return
N
Nuveen Charlotte, North Carolina $369B AUM 31.66% 1-Year Est. Return

Simplex Trading's REGN Position: Q1 2026 in Review

Simplex Trading sold out of Regeneron Pharmaceuticals (REGN) in Q1 2026, closing a stake of 8,559 shares — an estimated $6.55M sold.

Simplex Trading first reported a position in REGN in Q4 2014 and held it in 27 quarters. The position peaked at $13.2M in Q2 2017. 1,392 funds tracked by Wall St. Rank hold REGN as of Q1 2026.

  • Simplex Trading reported no remaining Regeneron Pharmaceuticals position as of Q1 2026 after selling out during the quarter.
  • Simplex Trading sold 8,559 Regeneron Pharmaceuticals shares in Q1 2026, an estimated $6.55M.
  • Simplex Trading first reported a position in Regeneron Pharmaceuticals in Q4 2014 and held it in 27 quarters.
  • Simplex Trading's Regeneron Pharmaceuticals position peaked at $13.2M in Q2 2017.
  • 1,392 funds tracked by Wall St. Rank held Regeneron Pharmaceuticals as of Q1 2026.

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