Regeneron Pharmaceuticals, Inc.
MX ˙ BMV ˙ US75886F1075
SecurityMX:REGN / Regeneron Pharmaceuticals, Inc.
InstitutionAtria Investments Llc
Latest Disclosed Ownership11,461 shares
Latest Disclosed Value $ 8,855,028
Atria Investments Llc reports 0.25% increase in ownership of REGN / Regeneron Pharmaceuticals, Inc.

On May 5, 2026 - Atria Investments Llc filed a 13F-HR form disclosing ownership of 11,461 shares of Regeneron Pharmaceuticals, Inc. (MX:REGN) valued at $8,855,028 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 11,432 shares of Regeneron Pharmaceuticals, Inc.. This represents a change in shares of 0.25% 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)
2026-05-05 2026-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 11,461 29 0.25 8,855 0.36 0.0991
2026-02-05 2025-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 11,432 -45 -0.39 8,824 36.73 0.1003
2025-11-06 2025-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 11,477 8 0.07 6,453 7.17 0.0737
2025-08-04 2025-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 11,469 1,442 14.38 6,021 -5.32 0.0711
2025-05-06 2025-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 10,027 3,390 51.08 6,359 34.53 0.0815
2025-02-06 2024-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 6,637 -1,685 -20.25 4,728 -45.96 0.0588
2024-11-01 2024-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 8,322 -281 -3.27 8,748 -3.25 0.1087
2024-08-13 2024-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 8,603 -54 -0.62 9,042 8.73 0.1171
2024-05-21 2024-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 8,657 941 12.20 8,317 22.95 0.1145
2024-02-14 2023-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 7,716 566 7.92 6,764 15.17 0.1047
2023-11-07 2023-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 7,150 -420 -5.55 5,873 8.14 0.1046
2023-08-04 2023-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 7,570 -383 -4.82 5,432 -16.74 0.0981
2023-05-10 2023-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 7,953 295 3.85 6,524 18.23 0.1235
2023-01-31 2022-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 7,658 -585 -7.10 5,517 -2.84 0.1131
2022-11-01 2022-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 8,243 324 4.09 5,678 21.30 0.1254
2022-08-11 2022-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 7,919 -1,138 -12.56 4,681 -26.00 0.0982
2022-05-02 2022-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 9,057 -992 -9.87 6,326 -0.32 0.1108
2022-02-04 2021-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 10,049 1,961 24.25 6,346 29.64 0.1131
2021-11-16 2021-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 8,088 -349 -4.14 4,895 3.88 0.0884
2021-08-10 2021-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 8,437 286 3.51 4,712 22.17 0.0909
2021-05-11 2021-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 8,151 -2,053 -20.12 3,857 -21.76 0.0854
2021-02-12 2020-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 10,204 -134 -1.30 4,930 -14.81 0.1190
2020-11-05 2020-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 10,338 -7,088 -40.67 5,787 -46.75 0.1758
2020-09-22 2020-06-30 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 17,426 7,075 68.35 10,867 115.02 0.3723
2020-08-13 2020-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 10,351 0 5,054 388,629.6231
2020-05-15 2020-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 10,351 2,616 33.82 5,054 74.04 0.3880
2020-02-11 2019-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 7,735 6,800 727.27 2,904 1,021.24 0.0787
2019-11-14 2019-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 935 107 12.92 259 4.44 0.0092
2019-08-26 2019-06-30 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 828 63 8.24 248 -21.02 0.0092
2019-05-15 2019-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 765 42 5.81 314 16.30 0.0133
2019-02-12 2018-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 723 -403 -35.79 270 -40.66 0.0120
2018-10-09 2018-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,126 -371 -24.78 455 -11.82 0.0180
2018-07-13 2018-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,497 147 10.89 516 10.97 0.0227
2018-04-30 2018-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,350 -580 -30.05 465 -35.95 0.0224
2018-01-12 2017-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,930 647 50.43 726 26.48 0.0361
2017-10-12 2017-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,283 115 9.85 574 0.00 0.0313
2017-07-10 2017-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,168 86 7.95 574 36.99 0.0351
2017-04-14 2017-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,082 120 12.47 419 18.70 0.0273
2017-01-13 2016-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 962 290 43.15 353 30.74 0.0269
2016-10-12 2016-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 672 672 270 0.0248
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.