Regeneron Pharmaceuticals, Inc.
MX ˙ BMV ˙ US75886F1075
SecurityMX:REGN / Regeneron Pharmaceuticals, Inc.
InstitutionAmeriprise Financial Inc
Latest Disclosed Ownership319,677 shares
Latest Disclosed Value $ 247,131,166
Ameriprise Financial Inc reports 9.51% increase in ownership of REGN / Regeneron Pharmaceuticals, Inc.

On May 15, 2026 - Ameriprise Financial Inc filed a 13F-HR form disclosing ownership of 319,677 shares of Regeneron Pharmaceuticals, Inc. (MX:REGN) valued at $247,131,166 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 291,919 shares of Regeneron Pharmaceuticals, Inc.. This represents a change in shares of 9.51% 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)
2026-05-15 2026-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 319,677 27,758 9.51 247,131 9.57 0.0106
2026-02-17 2025-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 291,919 8,814 3.11 225,552 41.66 0.0510
2025-11-14 2025-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 283,105 -4,594 -1.60 159,222 4.88 0.0366
2025-08-14 2025-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 287,699 -52,446 -15.42 151,818 -29.57 0.0374
2025-05-14 2025-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 340,145 13,594 4.16 215,571 -7.24 0.0582
2025-02-14 2024-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 326,551 -40,208 -10.96 232,397 -39.75 0.0596
2024-11-14 2024-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 366,759 -8,119 -2.17 385,713 -2.26 0.0989
2024-08-14 2024-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 374,878 42,333 12.73 394,633 23.34 0.1068
2024-05-15 2024-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 332,545 -3,306 -0.98 319,958 8.47 0.0881
2024-02-14 2023-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 335,851 -29,823 -8.16 294,980 -1.98 0.0883
2023-11-14 2023-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 365,674 -10,854 -2.88 300,937 11.24 0.0988
2023-08-14 2023-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 376,528 18,580 5.19 270,534 -8.02 0.0848
2023-05-22 2023-03-31 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 357,948 22,584 6.73 294,128 21.58 0.0965
2023-05-15 2023-03-31 13F REGENCY CENTERS COM 75886F107 357,948 22,584 294,128 0.0965
2023-02-14 2022-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 335,364 39,864 13.49 241,914 18.77 0.0829
2022-11-14 2022-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 295,500 -12,936 -4.19 203,686 11.73 0.0753
2022-08-15 2022-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 308,436 -90,395 -22.66 182,304 -34.52 0.0636
2022-05-16 2022-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 398,831 -8,165 -2.01 278,416 8.41 0.0822
2022-02-14 2021-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 406,996 26,327 6.92 256,819 11.46 0.0710
2021-11-15 2021-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 380,669 -30,628 -7.45 230,413 0.24 0.0736
2021-08-16 2021-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 411,297 126,731 44.53 229,852 70.42 0.0711
2021-05-17 2021-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 284,566 11,724 4.30 134,872 2.34 0.0448
2021-02-12 2020-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 272,842 -3,764 -1.36 131,793 -14.89 0.0467
2020-11-16 2020-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 276,606 4,209 1.55 154,843 -8.83 0.0630
2020-08-14 2020-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 272,397 -16,695 -5.77 169,842 20.42 0.0728
2020-05-15 2020-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 289,092 -27,220 -8.61 141,039 18.71 0.0740
2020-02-14 2019-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 316,312 632 0.20 118,814 35.68 0.0494
2019-11-14 2019-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 315,680 26,733 9.25 87,569 -3.15 0.0392
2019-08-14 2019-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 288,947 3,198 1.12 90,418 -22.94 0.0405
2019-05-15 2019-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 285,749 -12,556 -4.21 117,331 5.31 0.0540
2019-02-14 2018-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 298,305 1,128 0.38 111,414 -7.21 0.0557
2018-11-14 2018-09-30 13F REGENERON PHARMACEUT COM 75886F107 297,177 -18,346 -5.81 120,069 10.31 0.0420
2018-08-14 2018-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 315,523 36,669 13.15 108,848 13.35 0.0482
2018-05-14 2018-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 278,854 30,853 12.44 96,025 2.99 0.0434
2018-02-12 2017-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 248,001 28,984 13.23 93,237 -4.79 0.0425
2017-11-07 2017-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 219,017 1,809 0.83 97,927 -8.40 0.0466
2017-08-10 2017-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 217,208 -60,850 -21.88 106,908 -0.78 0.0535
2017-05-05 2017-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 278,058 -74,762 -21.19 107,749 -16.81 0.0558
2017-02-03 2016-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 352,820 79,810 29.23 129,517 18.00 0.0707
2016-11-08 2016-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 273,010 196,415 256.43 109,756 310.33 0.0615
2016-08-08 2016-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 76,595 41,590 118.81 26,748 112.02 0.0157
2016-05-12 2016-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 35,005 -57,581 -62.19 12,616 -75.05 0.0075
2016-02-11 2015-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 92,586 -84,515 -47.72 50,573 -38.61 0.0297
2015-11-12 2015-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 177,101 94,614 114.70 82,379 95.82 0.0510
2015-08-13 2015-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 82,487 1,420 1.75 42,069 14.95 0.0239
2015-05-14 2015-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 81,067 47,103 138.69 36,599 162.68 0.0210
2015-02-13 2014-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 33,964 1,735 5.38 13,933 19.91 0.0081
2014-11-14 2014-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 32,229 -1,291 -3.85 11,620 22.73 0.0070
2014-08-13 2014-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 33,520 584 1.77 9,468 -4.25 0.0056
2014-05-14 2014-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 32,936 -39,530 -54.55 9,888 -50.42 0.0059
2014-02-14 2013-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 72,466 -111,360 -60.58 19,943 -65.32 0.0121
2013-11-14 2013-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 183,826 45,813 33.19 57,499 85.27 0.0377
2013-08-14 2013-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 138,013 138,013 31,036 0.0215
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.