Regeneron Pharmaceuticals, Inc.
MX ˙ BMV ˙ US75886F1075
SecurityMX:REGN / Regeneron Pharmaceuticals, Inc.
InstitutionProShare Advisors LLC
Latest Disclosed Ownership152,397 shares
Latest Disclosed Value $ 117,748,016
ProShare Advisors LLC reports 17.30% decrease in ownership of REGN / Regeneron Pharmaceuticals, Inc.

On April 24, 2026 - ProShare Advisors LLC filed a 13F-HR form disclosing ownership of 152,397 shares of Regeneron Pharmaceuticals, Inc. (MX:REGN) valued at $117,748,016 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 184,286 shares of Regeneron Pharmaceuticals, Inc.. This represents a change in shares of -17.30% 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)
2026-04-24 2026-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 152,397 -31,889 -17.30 117,748 -17.22 0.1743
2026-02-06 2025-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 184,286 49,132 36.35 142,245 87.18 0.2510
2025-11-06 2025-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 135,154 -34,189 -20.19 75,993 -14.52 0.1590
2025-08-07 2025-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 169,343 6,051 3.71 88,905 -14.15 0.1774
2025-05-08 2025-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 163,292 17,157 11.74 103,565 -0.51 0.2338
2025-02-14 2024-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 146,135 26,018 21.66 104,096 -17.56 0.2379
2024-11-14 2024-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 120,117 6,906 6.10 126,272 6.12 0.3095
2024-08-13 2024-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 113,211 -11,992 -9.58 118,988 -1.26 0.3183
2024-05-08 2024-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 125,203 21,604 20.85 120,507 32.44 0.3204
2024-02-14 2023-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 103,599 -18,022 -14.82 90,990 -9.09 0.2780
2023-11-13 2023-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 121,621 12,984 11.95 100,089 28.22 0.3121
2023-08-10 2023-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 108,637 -5,831 -5.09 78,060 -17.01 0.2264
2023-05-26 2023-03-31 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 114,468 9,788 9.35 94,055 24.53 0.2874
2023-05-12 2023-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 114,468 9,788 94,055 0.2991
2023-02-02 2022-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 104,680 -14,924 -12.48 75,526 -8.34 0.2652
2022-11-07 2022-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 119,604 -23,334 -16.32 82,393 -2.49 0.3162
2022-08-01 2022-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 142,938 -64,197 -30.99 84,495 -41.59 0.2802
2022-05-10 2022-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 207,135 -8,932 -4.13 144,667 6.02 0.3108
2022-02-08 2021-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 216,067 63,874 41.97 136,450 48.15 0.2678
2021-11-12 2021-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 152,193 16,450 12.12 92,104 21.48 0.2588
2021-08-13 2021-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 135,743 -4,301 -3.07 75,818 14.42 0.2216
2021-05-14 2021-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 140,044 19,031 15.73 66,260 13.34 0.2083
2021-02-09 2020-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 121,013 16,493 15.78 58,463 -0.08 0.2175
2020-11-13 2020-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 104,520 18,638 21.70 58,508 9.24 0.2704
2020-08-03 2020-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 85,882 11,959 16.18 53,560 48.38 0.2861
2020-05-15 2020-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 73,923 -30,717 -29.35 36,096 -8.13 0.2594
2020-02-12 2019-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 104,640 -442 -0.42 39,290 34.79 0.1819
2019-11-12 2019-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 105,082 2,893 2.83 29,150 -8.86 0.1632
2019-08-13 2019-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 102,189 -895 -0.87 31,985 -24.44 0.1913
2019-05-15 2019-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 103,084 -2,169 -2.06 42,328 7.67 0.2533
2019-02-14 2018-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 105,253 13,338 14.51 39,312 5.86 0.2752
2018-11-14 2018-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 91,915 -17,851 -16.26 37,137 -1.93 0.2521
2018-08-13 2018-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 109,766 -7,194 -6.15 37,868 -5.98 0.2538
2018-05-14 2018-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 116,960 130 0.11 40,276 -8.30 0.2624
2018-02-14 2017-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 116,830 17,043 17.08 43,923 -1.56 0.3047
2017-11-13 2017-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 99,787 10,478 11.73 44,617 1.72 0.4100
2017-08-11 2017-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 89,309 3,025 3.51 43,863 31.18 0.4370
2017-05-12 2017-03-31 13F/A-2 REGENERON PHARMACEUTICALS COM 75886F107 86,284 -12,964 -13.06 33,436 -8.23 0.3497
2017-05-08 2017-03-31 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 86,284 0 33,436 0.3496
2017-04-25 2017-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 86,284 33,436
2017-02-13 2016-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 99,248 7,307 7.95 36,433 -1.43 0.4034
2016-11-10 2016-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 91,941 -24,704 -21.18 36,962 -9.26 0.5161
2016-08-12 2016-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 116,645 1,390 1.21 40,736 -1.94 0.5247
2016-05-06 2016-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 115,255 -14,503 -11.18 41,543 -41.03 0.5719
2016-02-05 2015-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 129,758 7,064 5.76 70,442 23.43 0.8533
2015-11-06 2015-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 122,694 5,534 4.72 57,070 -4.51 0.8016
2015-08-11 2015-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 117,160 -11,278 -8.78 59,767 3.07 0.8270
2015-05-08 2015-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 128,438 128,438 0.00 57,987 0.6831
2015-01-30 2014-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 0 -85,613 -100.00 0 -100.00
2014-11-06 2014-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 85,613 16,265 23.45 30,865 57.56 0.4092
2014-08-08 2014-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 69,348 -13,827 -16.62 19,589 -21.57 0.2538
2014-05-07 2014-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 83,175 6,351 8.27 24,976 18.12 0.3124
2014-02-04 2013-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 76,824 24,894 47.94 21,145 30.15 0.3151
2013-11-07 2013-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 51,930 4,648 9.83 16,247 52.80 0.3856
2013-07-25 2013-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 47,282 47,282 10,633 0.2087
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.