Regeneron Pharmaceuticals, Inc.
MX ˙ BMV ˙ US75886F1075
SecurityMX:REGN / Regeneron Pharmaceuticals, Inc.
InstitutionFIL Ltd
Latest Disclosed Ownership309,509 shares
Latest Disclosed Value $ 239,139,034
FIL Ltd reports 41.51% decrease in ownership of REGN / Regeneron Pharmaceuticals, Inc.

On May 15, 2026 - FIL Ltd filed a 13F-HR form disclosing ownership of 309,509 shares of Regeneron Pharmaceuticals, Inc. (MX:REGN) valued at $239,139,034 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 529,190 shares of Regeneron Pharmaceuticals, Inc.. This represents a change in shares of -41.51% during the quarter.

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.

Upgrade to unlock premium data and export to Excel .

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 309,509 -219,681 -41.51 239,139 -41.45 0.1032
2026-02-17 2025-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 529,190 341,666 182.20 408,466 287.39 0.3057
2025-11-13 2025-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 187,524 21,438 12.91 105,439 20.92 0.0829
2025-08-14 2025-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 166,086 81,013 95.23 87,195 61.61 0.0745
2025-05-12 2025-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 85,073 -20,968 -19.77 53,956 -28.57 0.0513
2025-02-13 2024-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 106,041 5,232 5.19 75,536 -28.72 0.0706
2024-11-13 2024-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 100,809 6,310 6.68 105,974 6.70 0.0961
2024-08-13 2024-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 94,499 5,240 5.87 99,321 15.61 0.0982
2024-05-13 2024-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 89,259 9,613 12.07 85,911 22.81 0.0852
2024-02-13 2023-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 79,646 18,654 30.58 69,952 39.37 0.0735
2023-11-13 2023-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 60,992 22,157 57.05 50,194 79.88 0.0591
2023-08-11 2023-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 38,835 34,118 723.30 27,905 620.10 0.0314
2023-05-11 2023-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 4,717 -588 -11.08 3,876 1.25 0.0044
2023-02-13 2022-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 5,305 5,303 265,150.00 3,828 382,600.00 0.0046
2022-11-10 2022-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2 2 1 0.0000
2022-08-12 2022-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 0 -400 -100.00 0 -100.00
2022-05-13 2022-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 400 -147,994 -99.73 279 -99.70 0.0003
2022-02-14 2021-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 148,394 -263,668 -63.99 93,714 -62.42 0.0961
2021-11-15 2021-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 412,062 -57,124 -12.18 249,372 -4.84 0.2769
2021-08-13 2021-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 469,186 83,083 21.52 262,060 43.45 0.2813
2021-05-14 2021-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 386,103 124,556 47.62 182,680 44.58 0.2079
2021-03-23 2020-12-31 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 261,547 -22,812 -8.02 126,356 -20.62 0.1556
2021-02-08 2020-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 261,547 -22,812 126,356 61,112.4369
2020-11-13 2020-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 284,359 -278,104 -49.44 159,179 -54.62 0.1974
2020-08-13 2020-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 562,463 85,490 17.92 350,780 50.61 0.4730
2020-05-14 2020-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 476,973 476,952 2,271,200.00 232,901 2,911,162.50 0.3827
2020-02-07 2019-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 21 1 5.00 8 33.33 0.0000
2019-11-13 2019-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 20 0 0.00 6 0.00 0.0000
2019-08-13 2019-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 20 0 0.00 6 -25.00 0.0000
2019-05-13 2019-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 20 20 8 0.0000
2018-05-14 2018-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 0 -11,257 -100.00 0 -100.00
2018-02-12 2017-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 11,257 0 0.00 4,232 -15.91 0.0118
2017-11-13 2017-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 11,257 -15,681 -58.21 5,033 -61.96 0.0144
2017-08-29 2017-06-30 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 26,938 -6,120 -18.51 13,230 3.28 0.0382
2017-08-11 2017-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 26,938 -6,120 13,230
2017-05-11 2017-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 33,058 -2,782 -7.76 12,810 -2.64 0.0360
2017-02-10 2016-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 35,840 1,689 4.95 13,157 -4.17 0.0386
2016-11-14 2016-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 34,151 0 0.00 13,729 15.12 0.0411
2016-08-11 2016-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 34,151 -3,041 -8.18 11,926 -11.03 0.0380
2016-05-16 2016-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 37,192 24,567 194.59 13,405 95.58 0.0415
2016-02-12 2015-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 12,625 0 0.00 6,854 16.72 0.0208
2015-11-10 2015-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 12,625 12,625 5,872 0.0204
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.