Regeneron Pharmaceuticals, Inc.
MX ˙ BMV ˙ US75886F1075
SecurityMX:REGN / Regeneron Pharmaceuticals, Inc.
InstitutionBokf, Na
Latest Disclosed Ownership1,351 shares
Latest Disclosed Value $ 1,043,837
Bokf, Na reports 1.82% decrease in ownership of REGN / Regeneron Pharmaceuticals, Inc.

On May 8, 2026 - Bokf, Na filed a 13F-HR form disclosing ownership of 1,351 shares of Regeneron Pharmaceuticals, Inc. (MX:REGN) valued at $1,043,837 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 3, 2026 disclosing 1,376 shares of Regeneron Pharmaceuticals, Inc.. This represents a change in shares of -1.82% 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)
2026-05-08 2026-03-31 13F REGENERON PHARMACEUTICALS common 75886F107 1,351 -25 -1.82 1,044 -1.79 0.0123
2026-02-03 2025-12-31 13F REGENERON PHARMACEUTICALS common 75886F107 1,376 -172 -11.11 1,062 22.07 0.0163
2025-11-13 2025-09-30 13F REGENERON PHARMACEUTICALS common 75886F107 1,548 -637 -29.15 870 -24.15 0.0131
2025-08-12 2025-06-30 13F REGENERON PHARMACEUTICALS common 75886F107 2,185 14 0.64 1,147 -16.64 0.0186
2025-05-13 2025-03-31 13F REGENERON PHARMACEUTICALS common 75886F107 2,171 -1,032 -32.22 1,377 -38.35 0.0243
2025-02-14 2024-12-31 13F REGENERON PHARMACEUTICALS common 75886F107 3,203 1,458 83.55 2,232 26.10 0.0377
2024-11-14 2024-09-30 13F REGENERON PHARMACEUTICALS common 75886F107 1,745 -220 -11.20 1,770 -14.29 0.0314
2024-08-08 2024-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,965 120 6.50 2,065 15.49 0.0371
2024-05-15 2024-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,845 -30 -1.60 1,788 8.63 0.0326
2024-02-14 2023-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,875 13 0.70 1,647 13.36 0.0322
2023-11-14 2023-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,862 -2,015 -51.97 1,452 -47.86 0.0320
2023-08-21 2023-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 3,877 172 4.64 2,786 -8.51 0.0567
2023-05-11 2023-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 3,705 -834 -18.37 3,044 -7.03 0.0637
2023-02-13 2022-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 4,539 495 12.24 3,275 17.52 0.0604
2022-11-14 2022-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 4,044 182 4.71 2,786 22.03 0.0564
2022-08-11 2022-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 3,862 -4 -0.10 2,283 -15.44 0.0438
2022-05-13 2022-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 3,866 143 3.84 2,700 14.84 0.0445
2022-03-11 2021-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 3,723 -38 -1.01 2,351 3.25 0.0364
2021-11-10 2021-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 3,761 -1,722 -31.41 2,277 -12.22 0.0392
2021-04-21 2021-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 5,483 -755 -12.10 2,594 -13.91 0.0472
2021-02-12 2020-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 6,238 589 10.43 3,013 -4.71 0.0575
2020-10-30 2020-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 5,649 -650 -10.32 3,162 -19.50 0.0695
2020-08-12 2020-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 6,299 -77 -1.21 3,928 26.18 0.0924
2020-05-13 2020-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 6,376 2,431 61.62 3,113 110.20 0.0897
2020-02-12 2019-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 3,945 86 2.23 1,481 38.41 0.0335
2019-11-13 2019-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 3,859 -1,338 -25.75 1,070 -34.19 0.0258
2019-08-14 2019-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 5,197 -27 -0.52 1,626 -24.20 0.0391
2019-05-15 2019-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 5,224 108 2.11 2,145 12.24 0.0514
2019-02-13 2018-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 5,116 1,311 34.45 1,911 24.33 0.0547
2018-11-13 2018-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 3,805 347 10.03 1,537 28.83 0.0386
2018-08-13 2018-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 3,458 -692 -16.67 1,193 -16.52 0.0321
2018-05-14 2018-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 4,150 -3,502 -45.77 1,429 -50.33 0.0406
2018-02-14 2017-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 7,652 218 2.93 2,877 -13.45 0.0793
2017-11-14 2017-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 7,434 -2,040 -21.53 3,324 -28.56 0.0965
2017-08-14 2017-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 9,474 429 4.74 4,653 32.75 0.1464
2017-05-15 2017-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 9,045 -659 -6.79 3,505 -1.60 0.1094
2017-02-14 2016-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 9,704 321 3.42 3,562 -5.57 0.1172
2016-11-10 2016-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 9,383 693 7.97 3,772 24.32 0.1249
2016-08-12 2016-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 8,690 114 1.33 3,034 -1.84 0.1069
2016-05-13 2016-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 8,576 744 9.50 3,091 -27.30 0.1117
2016-02-09 2015-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 7,832 -202 -2.51 4,252 13.78 0.1537
2015-11-13 2015-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 8,034 -933 -10.40 3,737 -18.32 0.1406
2015-08-13 2015-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 8,967 -1,216 -11.94 4,575 -0.50 0.1553
2015-05-14 2015-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 10,183 -2 -0.02 4,598 10.05 0.1548
2015-02-12 2014-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 10,185 -2,066 -16.86 4,178 -5.41 0.1442
2014-11-13 2014-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 12,251 -413 -3.26 4,417 23.48 0.1476
2014-08-14 2014-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 12,664 -912 -6.72 3,577 -12.24 0.1148
2014-05-14 2014-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 13,576 517 3.96 4,076 13.38 0.1351
2014-02-14 2013-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 13,059 -2,931 -18.33 3,595 -28.14 0.1205
2013-11-12 2013-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 15,990 -3,147 -16.44 5,003 16.24 0.1816
2013-08-14 2013-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 19,137 19,137 4,304 0.1626
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.