Regeneron Pharmaceuticals, Inc.
US ˙ NasdaqGS ˙ US75886F1075

SecurityREGN / Regeneron Pharmaceuticals, Inc.
InstitutionAssetmark, Inc
Latest Disclosed Ownership12,316 shares
Latest Disclosed Value $ 9,515,769
Assetmark, Inc reports 9.18% increase in ownership of REGN / Regeneron Pharmaceuticals, Inc.

On May 6, 2026 - Assetmark, Inc filed a 13F-HR form disclosing ownership of 12,316 shares of Regeneron Pharmaceuticals, Inc. (US:REGN) valued at $9,515,834 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 23, 2026 disclosing 11,280 shares of Regeneron Pharmaceuticals, Inc.. This represents a change in shares of 9.18% during the quarter. The current value of the position is $7,622,988 USD.

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)
2026-05-06 2026-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 12,316 1,036 9.18 9,516 9.29 0.0194
2026-01-23 2025-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 11,280 -9,539 -45.82 8,707 -25.62 0.0178
2025-11-06 2025-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 20,819 -106,802 -83.69 11,706 -82.53 0.0251
2025-08-04 2025-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 127,621 23,988 23.15 67,001 1.94 0.1582
2025-05-06 2025-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 103,633 2,658 2.63 65,727 -8.62 0.1805
2025-02-06 2024-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 100,975 -3,005 -2.89 71,927 -34.20 0.1954
2024-11-01 2024-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 103,980 8,289 8.66 109,308 8.68 0.3131
2024-08-13 2024-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 95,691 1,521 1.62 100,574 10.96 0.3110
2024-05-07 2024-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 94,170 1,999 2.17 90,638 11.97 0.2947
2024-02-09 2023-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 92,171 1,552 1.71 80,953 8.55 0.2925
2023-10-27 2023-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 90,619 9,980 12.38 74,575 28.71 0.2982
2023-08-11 2023-06-30 13F REGENERON PHARMACEUTICALS COM COM 75886F107 80,639 5,581 7.44 57,942 -6.05 0.2273
2023-05-05 2023-03-31 13F REGENERON PHARMACEUTICALS COM COM 75886F107 75,058 5,214 7.47 61,673 22.39 0.2550
2023-02-10 2022-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 69,844 2,610 3.88 50,392 8.80 0.2184
2022-11-01 2022-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 67,234 -653 -0.96 46,315 15.41 0.2166
2022-08-03 2022-06-30 13F REGENERON PHARMACEUTICALS COM COM 75886F107 67,887 -4,981 -6.84 40,130 -21.15 0.1799
2022-05-13 2022-03-31 13F REGENERON PHARMACEUTICALS COM COM 75886F107 72,868 10,903 17.60 50,892 30.05 0.2130
2022-02-14 2021-12-31 13F REGENERON PHARMACEUTICALS COM COM 75886F107 61,965 2,032 3.39 39,132 7.89 0.1608
2021-11-12 2021-09-30 13F REGENERON PHARMACEUTICALS COM COM 75886F107 59,933 -1,010 -1.66 36,270 6.55 0.1625
2021-08-16 2021-06-30 13F REGENERON PHARMACEUTICALS COM COM 75886F107 60,943 -2,192 -3.47 34,039 13.95 0.1578
2021-05-14 2021-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 63,135 5,495 9.53 29,872 7.28 0.1541
2021-02-10 2020-12-31 13F REGENERON PHARMACEUTICALS COM COM 75886F107 57,640 25,650 80.18 27,846 55.50 0.1551
2020-11-13 2020-09-30 13F REGENERON PHARMACEUTICALS COM COM 75886F107 31,990 30,843 2,689.01 17,907 2,404.48 0.1155
2020-08-11 2020-06-30 13F REGENERON PHARMACEUTICALS COM COM 75886F107 1,147 1,103 2,506.82 715 3,304.76 0.0051
2020-05-12 2020-03-31 13F REGENERON PHARMACEUTICALS COM COM 75886F107 44 44 21 0.0002
2020-02-11 2019-12-31 13F REGENERON PHARMACEUTICALS COM COM 75886F107 0 -3,887 -100.00 0 -100.00
2019-11-13 2019-09-30 13F REGENERON PHARMACEUTICALS COM COM 75886F107 3,887 3,868 20,357.89 1,078 17,866.67 0.0090
2019-08-14 2019-06-30 13F REGENERON PHARMACEUTICALS COM COM 75886F107 19 -190 -90.91 6 -93.02 0.0000
2019-05-14 2019-03-31 13F REGENERON PHARMACEUTICALS COM COM 75886F107 209 -57 -21.43 86 -13.13 0.0008
2019-02-13 2018-12-31 13F REGENERON PHARMACEUTICALS COM COM 75886F107 266 33 14.16 99 5.32 0.0010
2018-11-13 2018-09-30 13F REGENERON PHARMACEUTICALS COM COM 75886F107 233 155 198.72 94 248.15 0.0009
2018-08-01 2018-06-30 13F REGENERON PHARMACEUTICALS COM COM 75886F107 78 15 23.81 27 22.73 0.0003
2018-05-16 2018-03-31 13F REGENERON PHARMACEUTICALS COM COM 75886F107 63 -27 -30.00 22 -35.29 0.0002
2018-02-13 2017-12-31 13F REGENERON PHARMACEUTICALS COM COM 75886F107 90 29 47.54 34 25.93 0.0004
2017-11-08 2017-09-30 13F REGENERON PHARMACEUTICALS COM COM 75886F107 61 6 10.91 27 0.00 0.0003
2017-08-14 2017-06-30 13F REGENERON PHARMACEUTICALS COM COM 75886F107 55 -4 -6.78 27 17.39 0.0003
2017-09-15 2017-03-31 13F/A-1 REGENERON PHARMACEUTICALS COM COM 75886F107 59 12 25.53 23 35.29 0.0003
2017-05-08 2017-03-31 13F REGENERON PHARMACEUTICALS COM COM 75886F107 59 12 23
2017-09-15 2016-12-31 13F/A-1 REGENERON PHARMACEUTICALS COM COM 75886F107 47 3 6.82 17 -5.56 0.0002
2017-02-14 2016-12-31 13F REGENERON PHARMACEUTICALS COM COM 75886F107 47 3 17
2017-09-14 2016-09-30 13F/A-1 REGENERON PHARMACEUTICALS COM COM 75886F107 44 9 25.71 18 50.00 0.0003
2016-11-04 2016-09-30 13F REGENERON PHARMACEUTICALS COM COM 75886F107 44 9 18
2017-09-14 2016-06-30 13F/A-1 REGENERON PHARMACEUTICALS COM COM 75886F107 35 -26 -42.62 12 -45.45 0.0002
2016-08-08 2016-06-30 13F REGENERON PHARMACEUTICALS COM COM 75886F107 35 -26 12
2017-09-14 2016-03-31 13F/A-1 REGENERON PHARMACEUTICALS COM COM 75886F107 61 39 177.27 22 83.33 0.0004
2016-05-13 2016-03-31 13F REGENERON PHARMACEUTICALS COM COM 75886F107 61 39 22
2017-09-14 2015-12-31 13F/A-1 REGENERON PHARMACEUTICALS COM COM 75886F107 22 15 214.29 12 300.00 0.0002
2016-02-12 2015-12-31 13F REGENERON PHARMACEUTICALS COM COM 75886F107 22 15 12
2016-01-05 2015-09-30 13F/A-1 REGENERON PHARMACEUTICALS COM COM 75886F107 7 0 0.00 3 -25.00 0.0001
2015-11-10 2015-09-30 13F REGENERON PHARMACEUTICALS COM COM 75886F107 7 3
2015-08-13 2015-06-30 13F REGENERON PHARMACEUTICALS COM COM 75886F107 7 7 4 0.0001
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.