Regeneron Pharmaceuticals, Inc.
MX ˙ BMV ˙ US75886F1075
SecurityMX:REGN / Regeneron Pharmaceuticals, Inc.
InstitutionTd Asset Management Inc
Latest Disclosed Ownership350,923 shares
Latest Disclosed Value $ 271,137,147
Td Asset Management Inc reports 11.73% decrease in ownership of REGN / Regeneron Pharmaceuticals, Inc.

On May 11, 2026 - Td Asset Management Inc filed a 13F-HR form disclosing ownership of 350,923 shares of Regeneron Pharmaceuticals, Inc. (MX:REGN) valued at $271,137,147 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 397,552 shares of Regeneron Pharmaceuticals, Inc.. This represents a change in shares of -11.73% 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)
2026-05-11 2026-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 350,923 -46,629 -11.73 271,137 -11.64 0.2200
2026-02-10 2025-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 397,552 23,288 6.22 306,858 45.82 0.2469
2025-11-10 2025-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 374,264 51,407 15.92 210,437 24.15 0.1709
2025-07-28 2025-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 322,857 -29,030 -8.25 169,500 -24.05 0.1447
2025-05-07 2025-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 351,887 -7,502 -2.09 223,177 -12.82 0.2054
2025-02-11 2024-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 359,389 29,322 8.88 256,004 -25.61 0.2265
2024-11-01 2024-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 330,067 -21,478 -6.11 344,158 -6.85 0.3037
2024-08-02 2024-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 351,545 82,034 30.44 369,484 42.44 0.3446
2024-05-08 2024-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 269,511 166,998 162.90 259,402 188.11 0.2413
2024-02-12 2023-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 102,513 -77,754 -43.13 90,036 -39.31 0.0885
2023-10-27 2023-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 180,267 70,628 64.42 148,353 88.31 0.1797
2023-08-09 2023-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 109,639 -2,495 -2.23 78,780 -14.50 0.0897
2023-05-10 2023-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 112,134 9,469 9.22 92,137 24.39 0.1112
2023-02-07 2022-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 102,665 10,323 11.18 74,072 15.95 0.0914
2022-11-07 2022-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 92,342 5,048 5.78 63,884 23.80 0.0800
2022-08-04 2022-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 87,294 5,855 7.19 51,602 -9.28 0.0598
2022-05-10 2022-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 81,439 -203 -0.25 56,879 10.32 0.0336
2022-02-10 2021-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 81,642 1,634 2.04 51,559 6.49 0.0432
2021-11-09 2021-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 80,008 -780 -0.97 48,419 4.30 0.0503
2021-08-11 2021-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 80,788 2,104 2.67 46,422 24.69 0.0471
2021-05-14 2021-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 78,684 2,826 3.73 37,229 1.59 0.0416
2021-02-16 2020-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 75,858 1,146 1.53 36,648 -12.37 0.0445
2020-11-10 2020-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 74,712 5,258 7.57 41,822 -3.45 0.0580
2020-08-13 2020-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 69,454 8,290 13.55 43,315 45.03 0.0616
2020-05-15 2020-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 61,164 8,665 16.51 29,866 51.51 0.0505
2020-02-11 2019-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 52,499 -5,867 -10.05 19,712 21.75 0.0286
2019-11-07 2019-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 58,366 1,655 2.92 16,191 -8.79 0.0247
2019-08-01 2019-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 56,711 -10,910 -16.13 17,751 -36.07 0.0266
2019-05-08 2019-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 67,621 19,567 40.72 27,767 54.71 0.0424
2019-02-01 2018-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 48,054 2,299 5.02 17,948 -2.92 0.0312
2018-11-01 2018-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 45,755 -3,988 -8.02 18,487 7.73 0.0273
2018-07-31 2018-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 49,743 1,634 3.40 17,161 3.59 0.0262
2018-05-11 2018-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 48,109 -385 -0.79 16,567 -9.13 0.0254
2018-02-02 2017-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 48,494 -153 -0.31 18,232 -16.18 0.0266
2017-11-09 2017-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 48,647 -3,577 -6.85 21,751 -15.20 0.0326
2017-08-01 2017-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 52,224 -11,989 -18.67 25,649 3.08 0.0404
2017-05-05 2017-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 64,213 -405 -0.63 24,883 4.90 0.0397
2017-02-08 2016-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 64,618 -3,226 -4.76 23,721 -13.03 0.0400
2016-11-02 2016-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 67,844 -18,479 -21.41 27,275 -9.53 0.0472
2016-08-04 2016-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 86,323 -11,011 -11.31 30,147 -14.07 0.0547
2016-05-05 2016-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 97,334 -16,631 -14.59 35,083 -43.29 0.0656
2016-02-04 2015-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 113,965 3,348 3.03 61,868 20.24 0.1227
2015-11-12 2015-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 110,617 11,800 11.94 51,452 2.07 0.1013
2015-08-11 2015-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 98,817 12,227 14.12 50,410 28.95 0.0900
2015-04-28 2015-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 86,590 86,590 0.00 39,094 0.0706
2015-01-30 2014-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 0 -80,855 -100.00 0 -100.00
2014-11-06 2014-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 80,855 4,865 6.40 29,150 35.80 0.0503
2014-08-12 2014-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 75,990 -26,610 -25.94 21,465 -30.33 0.0366
2014-05-09 2014-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 102,600 -16,100 -13.56 30,809 -5.70 0.0560
2014-02-07 2013-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 118,700 -2,300 -1.90 32,671 -13.70 0.0610
2013-11-08 2013-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 121,000 -4,300 -3.43 37,857 34.35 0.0752
2013-07-24 2013-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 125,300 125,300 28,177 0.0604
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.