Regeneron Pharmaceuticals, Inc.
MX ˙ BMV ˙ US75886F1075
SecurityMX:REGN / Regeneron Pharmaceuticals, Inc.
InstitutionStifel Financial Corp
Latest Disclosed Ownership48,907 shares
Latest Disclosed Value $ 37,790,194
Stifel Financial Corp reports 3.19% decrease in ownership of REGN / Regeneron Pharmaceuticals, Inc.

On May 12, 2026 - Stifel Financial Corp filed a 13F-HR form disclosing ownership of 48,907 shares of Regeneron Pharmaceuticals, Inc. (MX:REGN) valued at $37,790,194 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 50,520 shares of Regeneron Pharmaceuticals, Inc.. This represents a change in shares of -3.19% 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)
2026-05-12 2026-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 48,907 -1,613 -3.19 37,790 -3.09 0.0081
2026-02-13 2025-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 50,520 5,077 11.17 38,997 52.61 0.0351
2025-11-12 2025-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 45,443 7,784 20.67 25,552 29.23 0.0233
2025-08-14 2025-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 37,659 -465 -1.22 19,772 -18.23 0.0192
2025-05-14 2025-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 38,124 38 0.10 24,180 -10.88 0.0257
2025-02-13 2024-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 38,086 -10,159 -21.06 27,130 -46.51 0.0283
2024-11-14 2024-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 48,245 3,271 7.27 50,717 7.29 0.0532
2024-08-13 2024-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 44,974 65 0.14 47,269 9.36 0.0532
2024-05-14 2024-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 44,909 3,230 7.75 43,224 18.08 0.0492
2024-02-12 2023-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 41,679 10,649 34.32 36,606 43.35 0.0461
2023-11-13 2023-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 31,030 3,385 12.24 25,537 28.55 0.0359
2023-08-14 2023-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 27,645 4,579 19.85 19,864 4.81 0.0272
2023-05-12 2023-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 23,066 -1,031 -4.28 18,953 9.01 0.0272
2023-02-13 2022-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 24,097 -1,015 -4.04 17,386 0.50 0.0261
2022-11-14 2022-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 25,112 -16,142 -39.13 17,299 -29.06 0.0283
2022-08-15 2022-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 41,254 -3,475 -7.77 24,386 -21.94 0.0382
2022-05-13 2022-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 44,729 1,376 3.17 31,239 14.11 0.0426
2022-02-14 2021-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 43,353 -1,761 -3.90 27,377 0.27 0.0362
2021-11-15 2021-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 45,114 821 1.85 27,302 10.36 0.0400
2021-08-13 2021-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 44,293 16,509 59.42 24,738 88.18 0.0370
2021-05-14 2021-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 27,784 -1,833 -6.19 13,146 -8.12 0.0217
2021-02-12 2020-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 29,617 -10,398 -25.99 14,308 -36.12 0.0255
2020-11-16 2020-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 40,015 2,072 5.46 22,400 -5.34 0.0461
2020-08-14 2020-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 37,943 19,021 100.52 23,663 157.40 0.0544
2020-05-14 2020-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 18,922 11,420 152.23 9,193 225.76 0.0254
2020-02-13 2019-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 7,502 0 0.00 2,822 35.67 0.0059
2019-11-19 2019-09-30 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 7,502 -29,044 -79.47 2,080 -81.82 0.0053
2019-11-13 2019-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 7,502 -29,044 2,080 1,165.9443
2019-08-14 2019-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 36,546 -7,291 -16.63 11,443 -36.42 0.0295
2019-05-14 2019-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 43,837 -6,740 -13.33 17,998 -4.10 0.0509
2019-02-13 2018-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 50,577 -729 -1.42 18,767 -9.63 0.0607
2018-11-13 2018-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 51,306 5,992 13.22 20,766 33.01 0.0595
2018-08-14 2018-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 45,314 -1,780 -3.78 15,612 -3.68 0.0479
2018-05-11 2018-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 47,094 -34,400 -42.21 16,208 -47.32 0.0512
2018-02-14 2017-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 81,494 -5,765 -6.61 30,764 -21.13 0.0975
2017-11-13 2017-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 87,259 11,345 14.94 39,008 4.98 0.1354
2017-08-14 2017-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 75,914 -3,202 -4.05 37,156 21.11 0.1380
2017-05-10 2017-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 79,116 -2,483 -3.04 30,679 2.40 0.1188
2017-02-16 2016-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 81,599 24,092 41.89 29,959 29.65 0.1272
2016-11-15 2016-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 57,507 -13,188 -18.65 23,107 -6.42 0.1039
2016-08-17 2016-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 70,695 -23,163 -24.68 24,691 -27.02 0.1142
2016-05-16 2016-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 93,858 -5,375 -5.42 33,832 -37.22 0.1803
2016-03-21 2015-12-31 13F/A-2 REGENERON PHARMACEUTICALS COM 75886F107 99,233 -3,104 -3.03 53,891 13.10 0.2806
2016-02-26 2015-12-31 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 99,232 -1 53,892 0.2818
2016-02-16 2015-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 97,927 53,085
2015-11-16 2015-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 102,337 1,184 1.17 47,651 -7.73 0.2677
2015-08-17 2015-06-30 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 101,153 2,139 2.16 51,643 15.44 0.2670
2015-08-17 2015-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 100,852 51,495
2015-05-14 2015-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 99,014 19,677 24.80 44,736 37.55 0.2449
2015-02-13 2014-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 79,337 77,579 4,412.91 32,524 5,038.07 0.1807
2014-11-13 2014-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,758 190 12.12 633 42.89 0.0056
2014-08-14 2014-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,568 -144 -8.41 443 -13.81 0.0040
2014-05-15 2014-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,712 1,712 514 0.0049
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.