Regeneron Pharmaceuticals, Inc.
MX ˙ BMV ˙ US75886F1075
SecurityMX:REGN / Regeneron Pharmaceuticals, Inc.
InstitutionStandard Life Aberdeen plc
Latest Disclosed Ownership121,344 shares
Latest Disclosed Value $ 93,755,228
Standard Life Aberdeen plc reports 24.97% decrease in ownership of REGN / Regeneron Pharmaceuticals, Inc.

On April 29, 2026 - Standard Life Aberdeen plc filed a 13F-HR form disclosing ownership of 121,344 shares of Regeneron Pharmaceuticals, Inc. (MX:REGN) valued at $93,755,228 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 16, 2026 disclosing 161,738 shares of Regeneron Pharmaceuticals, Inc.. This represents a change in shares of -24.97% 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)
2026-04-29 2026-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 121,344 -40,394 -24.97 93,755 -24.90 0.0821
2026-01-16 2025-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 161,738 10,235 6.76 124,841 46.55 0.1933
2025-11-07 2025-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 151,503 -52,247 -25.64 85,186 -20.36 0.1347
2025-07-24 2025-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 203,750 -41,447 -16.90 106,969 -31.28 0.1820
2025-05-13 2025-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 245,197 56,746 30.11 155,647 16.76 0.3035
2025-01-24 2024-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 188,451 1,740 0.93 133,303 -32.12 0.2502
2024-10-25 2024-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 186,711 8,494 4.77 196,385 4.84 0.3601
2024-08-09 2024-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 178,217 -42,032 -19.08 187,311 -11.64 0.3591
2024-05-09 2024-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 220,249 349 0.16 211,987 9.76 0.4156
2024-01-31 2023-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 219,900 186,215 552.81 193,136 596.71 0.4187
2023-11-07 2023-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 33,685 -451 -1.32 27,721 13.02 0.0707
2024-06-20 2023-06-30 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 34,136 280 0.83 24,528 -11.83 0.0571
2023-08-04 2023-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 34,136 280 24,528 0.0571
2024-06-20 2023-03-31 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 33,856 509 1.53 27,818 15.62 0.0696
2023-04-28 2023-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 33,856 509 27,818 0.0696
2024-06-20 2022-12-31 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 33,347 -1,367 -3.94 24,060 0.61 0.0654
2023-02-10 2022-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 33,347 -1,367 24,060 0.0654
2022-11-10 2022-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 34,714 2,415 7.48 23,914 24.54 0.0712
2022-08-05 2022-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 32,299 3,830 13.45 19,202 -4.65 0.0604
2022-05-04 2022-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 28,469 -7,388 -20.60 20,138 -11.07 0.0515
2022-02-10 2021-12-31 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 35,857 -1,957 -5.18 22,645 -1.51 0.0497
2022-02-08 2021-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 35,857 -1,957 22,645 0.0163
2021-11-15 2021-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 37,814 -13,891 -26.87 22,992 -20.42 0.0518
2021-08-10 2021-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 51,705 -22,347 -30.18 28,890 -17.57 0.0633
2021-05-06 2021-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 74,052 38,151 106.27 35,047 102.07 0.0797
2021-02-10 2020-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 35,901 2,527 7.57 17,344 -7.16 0.0423
2020-10-21 2020-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 33,374 -4,497 -11.87 18,682 -20.90 0.0499
2020-08-10 2020-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 37,871 5,107 15.59 23,619 47.63 0.0639
2020-05-13 2020-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 32,764 -199 -0.60 15,999 29.23 0.0508
2020-02-18 2019-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 32,963 -499 -1.49 12,380 33.35 0.0299
2019-11-13 2019-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 33,462 -5,497 -14.11 9,284 -23.87 0.0232
2019-08-13 2019-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 38,959 -696 -1.76 12,195 -25.11 0.0271
2019-05-14 2019-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 39,655 19,223 94.08 16,284 118.40 0.0353
2019-02-12 2018-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 20,432 -407 -1.95 7,456 -11.46 0.0177
2018-11-20 2018-09-30 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 20,839 2,403 13.03 8,421 32.41 0.0157
2018-11-13 2018-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 20,839 2,403 8,421
2018-08-09 2018-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 18,436 4,468 31.99 6,360 32.20 0.0122
2018-05-15 2018-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 13,968 -306 -2.14 4,811 -10.38 0.0095
2018-02-12 2017-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 14,274 522 3.80 5,368 -12.70 0.0103
2017-11-14 2017-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 13,752 13,752 6,149 0.0112
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.