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 		$16.6M Sell
21,500
-15,700
-42% -$12M 0.01% 491
2025
Q4 		$28.7M Sell
37,200
-12,600
-25% -$8.56M 0.02% 430
2025
Q3 		$28M Buy
49,800
+7,800
+19% +$4.41M 0.01% 510
2025
Q2 		$22.1M Buy
42,000
+16,200
+63% +$9.04M 0.01% 523
2025
Q1 		$16.4M Buy
25,800
+1,300
+5% +$894K 0.01% 617
2024
Q4 		$17.5M Sell
24,500
-6,400
-21% -$5.37M 0.01% 706
2024
Q3 		$32.5M Buy
30,900
+6,600
+27% +$7.34M 0.02% 442
2024
Q2 		$25.5M Sell
24,300
-6,000
-20% -$5.82M 0.02% 521
2024
Q1 		$29.2M Sell
30,300
-43,800
-59% -$41.6M 0.02% 517
2023
Q4 		$65.1M Buy
74,100
+9,700
+15% +$7.99M 0.04% 262
2023
Q3 		$53M Buy
64,400
+2,200
+4% +$1.73M 0.04% 276
2023
Q2 		$44.7M Sell
62,200
-68,200
-52% -$52.6M 0.04% 296
2023
Q1 		$107M Buy
130,400
+74,400
+133% +$56.1M 0.09% 148
2022
Q4 		$40.4M Sell
56,000
-700
-1% -$517K 0.04% 324
2022
Q3 		$39.1M Sell
56,700
-15,900
-22% -$10M 0.04% 318
2022
Q2 		$42.9M Buy
72,600
+50,300
+226% +$32.7M 0.05% 277
2022
Q1 		$15.6M Sell
22,300
-23,600
-51% -$14.9M 0.01% 625
2021
Q4 		$29M Buy
45,900
+20,000
+77% +$12.3M 0.03% 388
2021
Q3 		$14.9M Buy
25,900
+900
+4% +$559K 0.01% 558
2021
Q2 		$14M Buy
+25,000
New +$12.7M 0.01% 575
2021
Q1 		– Sell
-365
Closed -$17.6M – 9830
2020
Q4 		$17.6M Buy
365
+134
+58% +$72.3K 0.02% 387
2020
Q3 		$12.9M Sell
231
-154
-40% -$93.4K 0.02% 439
2020
Q2 		$24M Sell
385
-95
-20% -$53.9K 0.04% 265
2020
Q1 		$23.4M Sell
480
-458
-49% -$189K 0.04% 211
2019
Q4 		$35.2M Buy
938
+371
+65% +$125K 0.08% 162
2019
Q3 		$15.7M Sell
567
-346
-38% -$102K 0.04% 287
2019
Q2 		$28.6M Buy
913
+502
+122% +$167K 0.08% 160
2019
Q1 		$16.9M Sell
411
-192
-32% -$79.1K 0.05% 265
2018
Q4 		$22.5M Sell
603
-163
-21% -$59.7K 0.07% 183
2018
Q3 		$30.9M Buy
766
+136
+22% +$51.8K 0.1% 139
2018
Q2 		$21.7M Sell
630
-224
-26% -$70.1K 0.09% 162
2018
Q1 		$1.87M Sell
854
-331
-28% -$115K 0.08% 204
2017
Q4 		$1.34M Buy
1,185
+301
+34% +$122K 0.06% 290
2017
Q3 		$2.01M Sell
884
-242
-21% -$115K 0.08% 190
2017
Q2 		$2M Buy
1,126
+123
+12% +$53.8K 0.09% 181
2017
Q1 		$2.49M Sell
1,003
-26
-3% -$9.64K 0.11% 171
2016
Q4 		$1.33M Buy
1,029
+99
+11% +$37.6K 0.08% 216
2016
Q3 		$788K Buy
930
+554
+147% +$222K 0.05% 332
2016
Q2 		$1.33M Buy
376
+143
+61% +$55.1K 0.09% 211
2016
Q1 		$4.67M Sell
233
-181
-44% -$74.6K 0.37% 40
2015
Q4 		$1.11M Buy
414
+4
+1% +$2.17K 0.09% 191
2015
Q3 		$1.69M Buy
410
+119
+41% +$63.9K 0.12% 146
2015
Q2 		$471K Sell
291
-62
-18% -$30.3K 0.04% 414
2015
Q1 		$477K Sell
353
-50
-12% -$21.2K 0.06% 339
2014
Q4 		$275K Buy
+403
New +$158K 0.03% 459

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.