Regeneron Pharmaceuticals, Inc.
MX ˙ BMV ˙ US75886F1075
SecurityMX:REGN / Regeneron Pharmaceuticals, Inc.
Institution1832 Asset Management L.P.
Latest Disclosed Ownership2,000 shares
Latest Disclosed Value $ 1,545,280
1832 Asset Management L.P. reports 99.08% decrease in ownership of REGN / Regeneron Pharmaceuticals, Inc.

On May 14, 2026 - 1832 Asset Management L.P. filed a 13F-HR form disclosing ownership of 2,000 shares of Regeneron Pharmaceuticals, Inc. (MX:REGN) valued at $1,545,280 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 216,864 shares of Regeneron Pharmaceuticals, Inc.. This represents a change in shares of -99.08% 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)
2026-05-14 2026-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,000 -214,864 -99.08 1,545 -99.08 0.0014
2026-02-13 2025-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 216,864 216,864 167,391 0.1275
2025-08-13 2025-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 0 -2,092 -100.00 0 -100.00
2025-05-14 2025-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,092 -2,695 -56.30 1,327 -61.10 0.0012
2025-02-14 2024-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 4,787 871 22.24 3,410 -17.18 0.0029
2024-11-13 2024-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 3,916 1,731 79.22 4,117 79.27 0.0031
2024-08-13 2024-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,185 -621 -22.13 2,297 -14.96 0.0019
2024-05-14 2024-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,806 552 24.49 2,701 36.43 0.0016
2024-02-13 2023-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,254 353 18.57 1,980 26.53 0.0029
2023-11-13 2023-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,901 -314 -14.18 1,564 -1.70 0.0022
2023-08-14 2023-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,215 -6,679 -75.10 1,592 -78.23 0.0031
2023-05-12 2023-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 8,894 5,908 197.86 7,308 239.23 0.0150
2023-02-15 2022-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,986 -653 -17.94 2,154 -14.08 0.0044
2022-11-14 2022-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 3,639 -645 -15.06 2,507 -0.99 0.0053
2022-08-15 2022-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 4,284 940 28.11 2,532 9.94 0.0051
2022-05-16 2022-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 3,344 3,344 2,303 0.0038
2022-02-15 2021-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 0 -718 -100.00 0 -100.00
2021-11-15 2021-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 718 718 438 0.0008
2021-05-17 2021-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 0 -5,100 -100.00 0 -100.00
2021-02-16 2020-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 5,100 0 0.00 2,447 -16.94 0.0057
2020-11-16 2020-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 5,100 -25,200 -83.17 2,946 -84.21 0.0077
2020-08-14 2020-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 30,300 30,300 18,659 0.0560
2020-05-26 2020-03-31 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 0 -66 -100.00 0 -100.00
2020-02-14 2019-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 66 0 0.00 25 38.89 0.0001
2019-11-14 2019-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 66 0 0.00 18 -14.29 0.0001
2019-08-14 2019-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 66 -4 -5.71 21 -27.59 0.0001
2019-05-15 2019-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 70 0 0.00 29 11.54 0.0001
2019-02-14 2018-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 70 -1 -1.41 26 -10.34 0.0001
2018-11-14 2018-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 71 9 14.52 29 26.09 0.0001
2018-08-14 2018-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 62 31 100.00 23 109.09 0.0001
2018-05-15 2018-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 31 31 11 0.0000
2016-08-12 2016-06-30 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 0 -4,800 -100.00 0 -100.00
2016-05-12 2016-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 4,800 -179,430 -97.39 2,906 -97.07 0.0071
2016-02-12 2015-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 184,230 -6,540 -3.43 99,026 13.54 0.4280
2015-11-12 2015-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 190,770 -32,769 -14.66 87,219 -22.38 0.3649
2015-08-13 2015-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 223,539 219,169 5,015.31 112,365 5,586.49 0.3812
2015-05-13 2015-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 4,370 -114,210 -96.31 1,976 -95.87 0.0074
2015-02-12 2014-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 118,580 -117,010 -49.67 47,873 -43.16 0.1483
2014-11-12 2014-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 235,590 228,350 3,154.01 84,224 4,016.52 0.2749
2014-08-13 2014-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 7,240 -333,000 -97.87 2,046 -97.98 0.0064
2014-05-14 2014-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 340,240 -24,730 -6.78 101,233 1.22 0.3480
2014-02-13 2013-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 364,970 92,800 34.10 100,012 17.95 0.3846
2013-11-13 2013-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 272,170 -240,850 -46.95 84,794 -26.04 0.3759
2013-08-14 2013-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 513,020 513,020 114,641 0.5020
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.