Regeneron Pharmaceuticals, Inc.
MX ˙ BMV ˙ US75886F1075
SecurityMX:REGN / Regeneron Pharmaceuticals, Inc.
InstitutionSumitomo Mitsui Trust Holdings, Inc.
Latest Disclosed Ownership273,669 shares
Latest Disclosed Value $ 211,447,616
Sumitomo Mitsui Trust Holdings, Inc. reports 3.99% decrease in ownership of REGN / Regeneron Pharmaceuticals, Inc.

On April 30, 2026 - Sumitomo Mitsui Trust Holdings, Inc. filed a 13F-HR form disclosing ownership of 273,669 shares of Regeneron Pharmaceuticals, Inc. (MX:REGN) valued at $211,447,616 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 23, 2026 disclosing 285,031 shares of Regeneron Pharmaceuticals, Inc.. This represents a change in shares of -3.99% 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-04-30 2026-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 273,669 -11,362 -3.99 211,448 -3.89 0.1369
2026-01-23 2025-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 285,031 -22,258 -7.24 220,007 27.33 0.1292
2025-10-27 2025-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 307,289 -896 -0.29 172,779 6.79 0.0994
2025-07-31 2025-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 308,185 4,516 1.49 161,797 -15.99 0.1008
2025-04-25 2025-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 303,669 1,053 0.35 192,596 -10.65 0.1361
2025-01-28 2024-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 302,616 1,108 0.37 215,562 -31.99 0.1455
2024-11-05 2024-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 301,508 3,866 1.30 316,957 1.32 0.2197
2024-07-19 2024-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 297,642 -21,406 -6.71 312,831 1.87 0.2309
2024-04-19 2024-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 319,048 -301 -0.09 307,081 9.48 0.2108
2024-01-30 2023-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 319,349 -8,972 -2.73 280,481 3.81 0.2074
2023-10-30 2023-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 328,321 -5,080 -1.52 270,195 12.79 0.2218
2023-07-31 2023-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 333,401 -39,737 -10.65 239,562 -21.86 0.1866
2023-04-27 2023-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 373,138 -6,471 -1.70 306,596 11.94 0.2284
2023-01-30 2022-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 379,609 -11,541 -2.95 273,884 1.64 0.2168
2022-10-21 2022-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 391,150 -8,184 -2.05 269,452 14.15 0.2214
2022-07-26 2022-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 399,334 -7,340 -1.80 236,058 -16.89 0.1816
2022-04-27 2022-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 406,674 -25,541 -5.91 284,029 4.06 0.1891
2022-02-02 2021-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 432,215 -37,054 -7.90 272,952 -3.89 0.1660
2021-10-25 2021-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 469,269 -82,083 -14.89 283,992 -7.78 0.1769
2021-08-02 2021-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 551,352 55,497 11.19 307,952 31.26 0.1821
2021-04-30 2021-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 495,855 46,254 10.29 234,609 8.01 0.1466
2021-02-05 2020-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 449,601 -10,971 -2.38 217,207 -15.75 0.1403
2020-10-30 2020-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 460,572 -21,435 -4.45 257,819 -14.23 0.1737
2020-07-27 2020-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 482,007 80,867 20.16 300,604 53.47 0.2123
2020-04-27 2020-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 401,140 -64,683 -13.89 195,873 11.99 0.1684
2020-01-31 2019-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 465,823 -8,682 -1.83 174,907 32.88 0.1375
2019-10-31 2019-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 474,505 36,796 8.41 131,628 -3.92 0.1143
2019-07-29 2019-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 437,709 110,242 33.67 137,003 1.89 0.1223
2019-05-08 2019-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 327,467 22,752 7.47 134,464 21.69 0.1244
2019-02-06 2018-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 304,715 51,513 20.34 110,496 8.01 0.1188
2018-11-07 2018-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 253,202 6,047 2.45 102,304 19.98 0.1100
2018-08-01 2018-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 247,155 23,567 10.54 85,266 10.74 0.0994
2018-05-01 2018-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 223,588 3,812 1.73 76,995 -6.82 0.0990
2018-02-06 2017-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 219,776 2,867 1.32 82,627 -14.80 0.1067
2017-11-07 2017-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 216,909 -3,131 -1.42 96,984 -10.26 0.1369
2017-08-07 2017-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 220,040 3,258 1.50 108,070 28.65 0.1585
2017-05-02 2017-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 216,782 780 0.36 84,005 5.94 0.1298
2017-01-27 2016-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 216,002 637 0.30 79,292 -8.42 0.1294
2016-10-28 2016-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 215,365 387 0.18 86,581 15.32 0.1420
2016-07-29 2016-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 214,978 757 0.35 75,077 -2.77 0.1293
2016-05-06 2016-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 214,221 8,770 4.27 77,214 -31.44 0.1350
2016-02-09 2015-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 205,451 -1,717 -0.83 112,626 16.88 0.2014
2015-11-06 2015-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 207,168 3,272 1.60 96,362 -7.36 0.1866
2015-07-31 2015-06-30 13F Regeneron Pharmaceuticals COM 75886F107 203,896 -12,534 -5.79 104,013 6.45 0.1869
2015-05-08 2015-03-31 13F Regeneron Pharmaceuticals COM 75886F107 216,430 216,430 0.00 97,714 0.1764
2015-02-04 2014-12-31 13F Regeneron Pharmaceuticals COM 75886F107 0 -190,079 -100.00 0 -100.00
2014-11-07 2014-09-30 13F Regeneron Pharmaceuticals COM 75886F107 190,079 -158 -0.08 68,527 27.53 0.1374
2014-08-11 2014-06-30 13F Regeneron Pharmaceuticals COM 75886F107 190,237 -5,915 -3.02 53,736 -8.77 0.1103
2014-05-09 2014-03-31 13F Regeneron Pharmaceuticals COM 75886F107 196,152 1,985 1.02 58,901 9.09 0.1239
2014-02-14 2013-12-31 13F Regeneron Pharmaceuticals COM 75886F107 194,167 -8,177 -4.04 53,994 -14.71 0.1121
2013-11-07 2013-09-30 13F Regeneron Pharmaceuticals COM 75886F107 202,344 -1,400 -0.69 63,307 38.17 0.1369
2013-08-12 2013-06-30 13F Regeneron Pharmaceuticals COM 75886F107 203,744 203,744 45,818 0.1040
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.