Regeneron Pharmaceuticals, Inc.
MX ˙ BMV ˙ US75886F1075
SecurityMX:REGN / Regeneron Pharmaceuticals, Inc.
InstitutionFirst Trust Advisors Lp
Latest Disclosed Ownership346,855 shares
Latest Disclosed Value $ 267,994,072
First Trust Advisors Lp reports 68.60% increase in ownership of REGN / Regeneron Pharmaceuticals, Inc.

On May 13, 2026 - First Trust Advisors Lp filed a 13F-HR form disclosing ownership of 346,855 shares of Regeneron Pharmaceuticals, Inc. (MX:REGN) valued at $267,994,072 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 205,732 shares of Regeneron Pharmaceuticals, Inc.. This represents a change in shares of 68.60% 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)
2026-05-13 2026-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 346,855 141,123 68.60 267,994 68.76 0.1910
2026-02-13 2025-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 205,732 7,475 3.77 158,799 42.45 0.1154
2025-11-12 2025-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 198,257 14,213 7.72 111,474 15.37 0.0828
2025-08-13 2025-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 184,044 70,124 61.56 96,623 33.73 0.0777
2025-05-14 2025-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 113,920 -158,672 -58.21 72,251 -62.79 0.0640
2025-02-13 2024-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 272,592 -19,349 -6.63 194,175 -36.73 0.1712
2024-11-13 2024-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 291,941 -70,364 -19.42 306,900 -19.41 0.2924
2024-08-13 2024-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 362,305 25,833 7.68 380,793 17.58 0.3883
2024-05-13 2024-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 336,472 -29,478 -8.06 323,851 0.76 0.3287
2024-02-13 2023-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 365,950 195,902 115.20 321,410 129.67 0.3507
2023-11-13 2023-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 170,048 8,430 5.22 139,943 20.51 0.1659
2023-08-14 2023-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 161,618 -62,057 -27.74 116,129 -36.81 0.1320
2023-05-15 2023-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 223,675 23,995 12.02 183,787 27.57 0.2122
2023-02-09 2022-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 199,680 -253,607 -55.95 144,067 -53.86 0.1713
2022-11-14 2022-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 453,287 54,716 13.73 312,255 32.53 0.4048
2022-08-12 2022-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 398,571 225,696 130.55 235,607 95.14 0.2909
2022-05-13 2022-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 172,875 -30,812 -15.13 120,739 -6.14 0.1235
2022-02-08 2021-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 203,687 5,969 3.02 128,632 7.50 0.1251
2021-11-15 2021-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 197,718 25,468 14.79 119,655 24.37 0.1287
2021-10-12 2021-06-30 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 172,250 -1,807 -1.04 96,209 16.83 0.1041
2021-08-16 2021-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 172,250 -1,807 96,209 0.0992
2021-05-14 2021-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 174,057 12,136 7.50 82,353 5.28 0.0997
2021-02-02 2020-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 161,921 -202,221 -55.53 78,226 -61.62 0.1037
2020-11-05 2020-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 364,142 5,081 1.42 203,839 -8.97 0.3265
2020-07-22 2020-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 359,061 108,792 43.47 223,928 83.24 0.3881
2020-05-06 2020-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 250,269 -56,285 -18.36 122,204 6.17 0.2769
2020-02-03 2019-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 306,554 10,321 3.48 115,105 40.07 0.1966
2019-11-04 2019-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 296,233 -50,727 -14.62 82,175 -24.33 0.1547
2019-07-30 2019-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 346,960 -13,602 -3.77 108,598 -26.65 0.2047
2019-06-19 2019-03-31 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 360,562 69,493 23.88 148,054 36.19 0.2944
2019-05-09 2019-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 360,562 69,493 148,054
2019-02-07 2018-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 291,069 2,589 0.90 108,714 -6.73 0.2578
2018-10-25 2018-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 288,480 100,492 53.46 116,557 79.72 0.2170
2018-08-02 2018-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 187,988 39,879 26.93 64,854 27.16 0.1345
2018-04-23 2018-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 148,109 26,584 21.88 51,003 11.63 0.1171
2018-02-08 2017-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 121,525 -27,786 -18.61 45,689 -31.56 0.1088
2017-10-24 2017-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 149,311 38,887 35.22 66,760 23.10 0.1717
2017-08-02 2017-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 110,424 16,638 17.74 54,234 49.23 0.1447
2017-05-02 2017-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 93,786 -30,070 -24.28 36,343 -20.07 0.1007
2017-02-06 2016-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 123,856 37,666 43.70 45,466 31.22 0.1353
2016-11-01 2016-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 86,190 -710 -0.82 34,650 14.18 0.1034
2016-08-04 2016-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 86,900 -74,579 -46.18 30,348 -47.86 0.0956
2016-05-10 2016-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 161,479 -200,942 -55.44 58,203 -70.42 0.1870
2016-05-04 2015-12-31 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 362,421 -63,792 -14.97 196,747 -0.76 0.5106
2016-02-03 2015-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 362,421 196,747
2015-11-05 2015-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 426,213 -39,477 -8.48 198,249 -16.55 0.5743
2015-08-04 2015-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 465,690 1,993 0.43 237,562 13.48 0.6166
2015-05-04 2015-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 463,697 133,151 40.28 209,350 54.38 0.6149
2015-02-13 2014-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 330,546 88,944 36.81 135,606 55.69 0.4575
2014-11-12 2014-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 241,602 -40,852 -14.46 87,102 9.17 0.3426
2014-08-11 2014-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 282,454 25,981 10.13 79,785 3.60 0.3315
2014-05-12 2014-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 256,473 -29,241 -10.23 77,014 -2.07 0.3384
2014-08-08 2013-12-31 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 285,714 -6,636 -2.27 78,640 -14.02 0.3813
2014-02-13 2013-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 285,714 78,640
2013-11-12 2013-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 292,350 100,513 52.40 91,468 112.03 0.4958
2013-08-12 2013-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 191,837 191,837 43,140 0.2807
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.