Regeneron Pharmaceuticals, Inc.
MX ˙ BMV ˙ US75886F1075
SecurityMX:REGN / Regeneron Pharmaceuticals, Inc.
InstitutionNissay Asset Management Corp /japan/ /adv
Latest Disclosed Ownership28,869 shares
Latest Disclosed Value $ 22,305,344
Nissay Asset Management Corp /japan/ /adv reports 3.01% increase in ownership of REGN / Regeneron Pharmaceuticals, Inc.

On May 15, 2026 - Nissay Asset Management Corp /japan/ /adv filed a 13F-HR form disclosing ownership of 28,869 shares of Regeneron Pharmaceuticals, Inc. (MX:REGN) valued at $22,305,344 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 28,026 shares of Regeneron Pharmaceuticals, Inc.. This represents a change in shares of 3.01% 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.

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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 28,869 843 3.01 22,305 3.11 0.1182
2026-02-17 2025-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 28,026 963 3.56 21,632 42.17 0.1125
2025-11-14 2025-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 27,063 107 0.40 15,217 7.53 0.0840
2025-08-14 2025-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 26,956 539 2.04 14,152 -15.54 0.0828
2025-05-15 2025-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 26,417 2,292 9.50 16,754 -2.51 0.1089
2025-02-14 2024-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 24,125 847 3.64 17,187 -29.77 0.1048
2024-11-14 2024-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 23,278 1,921 8.99 24,471 9.02 0.1550
2024-08-14 2024-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 21,357 2,397 12.64 22,447 23.01 0.1486
2024-05-15 2024-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 18,960 4,295 29.29 18,249 41.68 0.1264
2024-02-14 2023-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 14,665 748 5.37 12,880 12.46 0.1036
2023-11-14 2023-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 13,917 882 6.77 11,453 22.28 0.1015
2023-08-14 2023-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 13,035 -12 -0.09 9,366 -12.63 0.0808
2023-05-15 2023-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 13,047 -416 -3.09 10,720 10.37 0.0958
2023-02-14 2022-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 13,463 -803 -5.63 9,713 -1.16 0.0928
2022-11-14 2022-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 14,266 560 4.09 9,827 21.29 0.1032
2022-08-15 2022-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 13,706 560 4.26 8,102 -11.75 0.0806
2022-05-16 2022-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 13,146 274 2.13 9,181 12.94 0.0800
2022-02-14 2021-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 12,872 431 3.46 8,129 7.97 0.0623
2021-11-10 2021-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 12,441 -366 -2.86 7,529 5.26 0.0638
2021-08-13 2021-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 12,807 -420 -3.18 7,153 14.30 0.0628
2021-05-11 2021-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 13,227 -317 -2.34 6,258 -4.36 0.0617
2021-02-08 2020-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 13,544 610 4.72 6,543 -9.63 0.0984
2020-10-20 2020-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 12,934 -486 -3.62 7,240 -13.49 0.1223
2020-07-27 2020-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 13,420 -10,373 -43.60 8,369 -27.97 0.1624
2020-05-05 2020-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 23,793 -14,913 -38.53 11,618 -20.06 0.2958
2020-02-14 2019-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 38,706 -2,424 -5.89 14,533 27.38 0.3230
2019-11-14 2019-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 41,130 6,347 18.25 11,409 4.79 0.2823
2019-08-07 2019-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 34,783 -1,229 -3.41 10,887 -26.37 0.2752
2019-05-03 2019-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 36,012 -998 -2.70 14,787 6.97 0.3907
2019-02-06 2018-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 37,010 386 1.05 13,823 -6.59 0.4212
2018-10-30 2018-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 36,624 2,436 7.13 14,798 25.46 0.3982
2018-08-08 2018-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 34,188 5,957 21.10 11,795 21.32 0.3451
2018-05-14 2018-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 28,231 4,856 20.77 9,722 10.65 0.3038
2018-02-14 2017-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 23,375 23,375 8,786 0.2676
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.