Regeneron Pharmaceuticals, Inc.
MX ˙ BMV ˙ US75886F1075
SecurityMX:REGN / Regeneron Pharmaceuticals, Inc.
InstitutionOrbimed Advisors Llc
ManagerSamuel Isaly
Latest Disclosed Ownership14,700 shares
Latest Disclosed Value $ 11,357,808
Orbimed Advisors Llc ownership in REGN / Regeneron Pharmaceuticals, Inc.

On May 15, 2026 - Orbimed Advisors Llc filed a 13F-HR form disclosing ownership of 14,700 shares of Regeneron Pharmaceuticals, Inc. (MX:REGN) valued at $11,357,808 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 14, 2025 disclosing 0 shares of Regeneron Pharmaceuticals, Inc..

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 14,700 14,700 11,358 0.2249
2025-02-14 2024-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 0 -45,200 -100.00 0 -100.00
2024-11-14 2024-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 45,200 22,400 98.25 47,516 98.29 0.8634
2024-08-14 2024-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 22,800 0 0.00 23,963 9.20 0.4732
2024-05-15 2024-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 22,800 9,300 68.89 21,945 85.09 0.4019
2024-02-14 2023-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 13,500 0 0.00 11,857 6.72 0.2368
2023-11-14 2023-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 13,500 0 0.00 11,110 14.53 0.2360
2023-08-14 2023-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 13,500 -10,500 -43.75 9,700 -50.81 0.1758
2023-05-15 2023-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 24,000 24,000 19,720 0.3871
2022-11-14 2022-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 0 -22,200 -100.00 0 -100.00
2022-08-15 2022-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 22,200 22,200 13,123 0.2378
2022-02-14 2021-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 0 -13,560 -100.00 0 -100.00
2021-11-15 2021-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 13,560 13,560 8,206 0.0902
2020-11-16 2020-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 0 -30,900 -100.00 0 -100.00
2020-08-14 2020-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 30,900 13,700 79.65 19,271 129.44 0.2713
2020-05-15 2020-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 17,200 -192,100 -91.78 8,399 -89.31 0.1412
2020-02-14 2019-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 209,300 -18,800 -8.24 78,588 24.20 1.1220
2019-11-14 2019-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 228,100 12,300 5.70 63,275 -6.32 1.2007
2019-08-14 2019-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 215,800 1,000 0.47 67,545 -23.42 1.0461
2019-05-15 2019-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 214,800 -7,300 -3.29 88,201 6.33 1.3654
2019-02-14 2018-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 222,100 -172,300 -43.69 82,954 -47.94 1.5340
2018-11-14 2018-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 394,400 21,900 5.88 159,353 24.00 1.9194
2018-08-14 2018-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 372,500 -590,400 -61.31 128,509 -61.24 1.5327
2018-05-15 2018-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 962,900 108,300 12.67 331,584 3.20 4.1113
2018-02-14 2017-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 854,600 281,830 49.20 321,295 25.46 4.0641
2017-11-14 2017-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 572,770 106,000 22.71 256,097 11.71 2.4475
2017-08-14 2017-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 466,770 88,600 23.43 229,249 56.44 2.4029
2017-05-15 2017-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 378,170 22,870 6.44 146,545 12.36 1.6611
2017-02-14 2016-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 355,300 0 0.00 130,427 -8.69 1.6619
2016-11-14 2016-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 355,300 -154,600 -30.32 142,838 -19.79 1.6267
2016-08-15 2016-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 509,900 -23,100 -4.33 178,072 -7.31 1.8582
2016-05-16 2016-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 533,000 50,000 10.35 192,115 -26.73 2.0215
2016-02-16 2015-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 483,000 -4,700 -0.96 262,206 15.59 2.3744
2015-11-18 2015-09-30 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 487,700 25,900 5.61 226,849 -3.71 2.2900
2015-11-13 2015-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 487,700 226,849
2015-08-14 2015-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 461,800 40,000 9.48 235,578 23.71 1.9690
2015-05-15 2015-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 421,800 31,600 8.10 190,434 18.96 1.6256
2015-02-13 2014-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 390,200 20,600 5.57 160,080 20.14 1.5297
2014-11-14 2014-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 369,600 43,000 13.17 133,248 44.43 1.3918
2014-08-14 2014-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 326,600 -212,400 -39.41 92,255 -43.00 1.0833
2014-05-15 2014-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 539,000 -199,800 -27.04 161,851 -20.41 1.9904
2014-02-14 2013-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 738,800 225,700 43.99 203,347 26.67 2.9884
2013-11-14 2013-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 513,100 162,000 46.14 160,534 103.32 2.8647
2013-08-14 2013-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 351,100 351,100 78,955 1.6735
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.