Regeneron Pharmaceuticals, Inc.
MX ˙ BMV ˙ US75886F1075
SecurityMX:REGN / Regeneron Pharmaceuticals, Inc.
InstitutionAdvisors Asset Management, Inc.
Latest Disclosed Ownership3,085 shares
Latest Disclosed Value $ 2,383,594
Advisors Asset Management, Inc. reports 5.66% decrease in ownership of REGN / Regeneron Pharmaceuticals, Inc.

On May 15, 2026 - Advisors Asset Management, Inc. filed a 13F-HR form disclosing ownership of 3,085 shares of Regeneron Pharmaceuticals, Inc. (MX:REGN) valued at $2,383,594 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 3,270 shares of Regeneron Pharmaceuticals, Inc.. This represents a change in shares of -5.66% 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 3,085 -185 -5.66 2,384 -5.59 0.0396
2026-02-12 2025-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 3,270 -156 -4.55 2,524 31.05 0.0424
2025-11-06 2025-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 3,426 -1,062 -23.66 1,926 -18.25 0.0327
2025-08-12 2025-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 4,488 -881 -16.41 2,356 -30.81 0.0422
2025-05-15 2025-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 5,369 204 3.95 3,405 -7.45 0.0640
2025-02-10 2024-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 5,165 -443 -7.90 3,679 -37.59 0.0678
2024-11-08 2024-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 5,608 -1,025 -15.45 5,895 -15.44 0.1083
2024-08-14 2024-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 6,633 -984 -12.92 6,971 -4.91 0.1360
2024-05-14 2024-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 7,617 -757 -9.04 7,331 -0.31 0.1409
2024-02-14 2023-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 8,374 -1,021 -10.87 7,355 -4.88 0.1502
2023-11-14 2023-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 9,395 381 4.23 7,732 19.38 0.1668
2023-08-14 2023-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 9,014 -674 -6.96 6,477 -18.64 0.1323
2023-05-12 2023-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 9,688 1,342 16.08 7,960 32.20 0.1619
2023-02-13 2022-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 8,346 458 5.81 6,022 10.80 0.1241
2022-11-08 2022-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 7,888 -144 -1.79 5,434 14.45 0.1142
2022-08-08 2022-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 8,032 -689 -7.90 4,748 -22.05 0.0901
2022-05-17 2022-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 8,721 -2,091 -19.34 6,091 -10.79 0.0938
2022-02-15 2021-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 10,812 -2,642 -19.64 6,828 -16.14 0.0975
2021-11-12 2021-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 13,454 -650 -4.61 8,142 3.35 0.1238
2021-07-30 2021-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 14,104 -2,889 -17.00 7,878 -2.01 0.1162
2021-05-07 2021-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 16,993 -4,726 -21.76 8,040 -23.38 0.1250
2021-02-12 2020-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 21,719 -537 -2.41 10,493 -15.77 0.1735
2020-11-16 2020-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 22,256 -1,113 -4.76 12,458 -14.52 0.2304
2020-08-12 2020-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 23,369 1,604 7.37 14,574 37.13 0.2837
2020-05-15 2020-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 21,765 978 4.70 10,628 36.17 0.2528
2020-05-20 2019-12-31 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 20,787 3,297 18.85 7,805 60.86 0.1368
2020-02-14 2019-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 20,787 3,297 7,805 69,081.6294
2019-11-14 2019-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 17,490 3,915 28.84 4,852 14.19 0.0894
2019-11-14 2019-06-30 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 13,575 3,848 39.56 4,249 6.38 0.0766
2019-08-14 2019-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 13,575 3,848 4,249
2019-05-15 2019-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 9,727 2,478 34.18 3,994 47.49 0.0711
2019-02-06 2018-12-31 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 7,249 3,378 87.26 2,708 73.15 0.0545
2019-01-31 2018-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 7,249 3,378 2,708
2018-11-15 2018-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 3,871 -1,095 -22.05 1,564 -8.70 0.0256
2018-08-22 2018-06-30 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 4,966 -1,995 -28.66 1,713 -23.22 0.0291
2018-08-15 2018-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 4,966 -1,995 1,713
2018-05-15 2018-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 6,961 -84 -1.19 2,231 -15.78 0.0374
2018-02-13 2017-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 7,045 198 2.89 2,649 -13.46 0.0435
2017-11-07 2017-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 6,847 -853 -11.08 3,061 -19.06 0.0513
2017-08-02 2017-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 7,700 2,396 45.17 3,782 84.04 0.0632
2017-05-02 2017-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 5,304 -1,861 -25.97 2,055 -28.65 0.0344
2016-10-31 2016-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 7,165 -1,735 -19.49 2,880 -7.34 0.0472
2016-08-08 2016-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 8,900 -492 -5.24 3,108 -8.18 0.0504
2016-05-16 2016-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 9,392 -4,040 -30.08 3,385 -53.58 0.0563
2016-02-10 2015-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 13,432 -2,013 -13.03 7,292 1.50 0.1157
2015-11-16 2015-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 15,445 -366 -2.31 7,184 -10.93 0.1146
2015-08-11 2015-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 15,811 912 6.12 8,066 19.90 0.1107
2015-05-13 2015-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 14,899 1,390 10.29 6,727 21.38 0.0896
2015-02-05 2014-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 13,509 3,062 29.31 5,542 47.16 0.0743
2014-11-13 2014-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 10,447 151 1.47 3,766 29.50 0.0519
2014-08-14 2014-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 10,296 1,153 12.61 2,908 5.94 0.0403
2014-05-15 2014-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 9,143 758 9.04 2,745 18.93 0.0416
2014-02-03 2013-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 8,385 215 2.63 2,308 -9.70 0.0372
2013-11-15 2013-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 8,170 -718 -8.08 2,556 27.86 0.0454
2013-08-14 2013-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 8,888 8,888 1,999 0.0378
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.