Regeneron Pharmaceuticals, Inc.
MX ˙ BMV ˙ US75886F1075
SecurityMX:REGN / Regeneron Pharmaceuticals, Inc.
InstitutionWhittier Trust Co
Latest Disclosed Ownership262 shares
Latest Disclosed Value $ 199,916
Whittier Trust Co reports 26.61% decrease in ownership of REGN / Regeneron Pharmaceuticals, Inc.

On April 28, 2026 - Whittier Trust Co filed a 13F-HR form disclosing ownership of 262 shares of Regeneron Pharmaceuticals, Inc. (MX:REGN) valued at $199,916 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 26, 2026 disclosing 357 shares of Regeneron Pharmaceuticals, Inc.. This represents a change in shares of -26.61% 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)
2026-04-28 2026-03-31 13F REGENERON PHARMA common 75886F107 262 -95 -26.61 200 -28.16 0.0023
2026-01-26 2025-12-31 13F REGENERON PHARMA common 75886F107 357 20 5.93 277 37.13 0.0030
2025-10-31 2025-09-30 13F REGENERON PHARMACEUTICALS common 75886F107 337 -3 -0.88 202 13.48 0.0023
2025-07-30 2025-06-30 13F REGENERON PHARMACEUTICALS COM US LARGE-CAP EQUITIES 75886F107 340 -500 -59.52 178 -66.54 0.0022
2025-05-02 2025-03-31 13F REGENERON PHARMACEUTICALS COM US LARGE-CAP EQUITIES 75886F107 840 -23 -2.67 533 -13.36 0.0074
2025-02-11 2024-12-31 13F REGENERON PHARMACEUTICALS COM US LARGE-CAP EQUITIES 75886F107 863 98 12.81 615 -23.63 0.0081
2024-10-21 2024-09-30 13F REGENERON PHARMACEUTICALS COM US LARGE-CAP EQUITIES 75886F107 765 0 0.00 804 0.00 0.0108
2024-07-29 2024-06-30 13F REGENERON PHARMACEUTICALS COM US LARGE-CAP EQUITIES 75886F107 765 -9 -1.16 804 8.06 0.0114
2024-05-02 2024-03-31 13F REGENERON PHARMACEUTICALS COM US LARGE-CAP EQUITIES 75886F107 774 0 0.00 745 9.57 0.0109
2024-01-11 2023-12-31 13F REGENERON PHARMACEUTICALS COM US LARGE-CAP EQUITIES 75886F107 774 486 168.75 680 186.50 0.0110
2023-10-27 2023-09-30 13F REGENERON PHARMACEUTICALS COM US LARGE-CAP EQUITIES 75886F107 288 35 13.83 237 30.94 0.0042
2023-07-24 2023-06-30 13F REGENERON PHARMACEUTICALS COM US LARGE-CAP EQUITIES 75886F107 253 -2 -0.78 182 -13.40 0.0032
2023-04-21 2023-03-31 13F REGENERON PHARMACEUTICALS COM US LARGE-CAP EQUITIES 75886F107 255 88 52.69 210 74.17 0.0038
2023-01-25 2022-12-31 13F REGENERON PHARMACEUTICALS COM US LARGE-CAP EQUITIES 75886F107 167 0 0.00 120 4.35 0.0023
2022-10-21 2022-09-30 13F REGENERON PHARMACEUTICALS COM US LARGE-CAP EQUITIES 75886F107 167 -26 -13.47 115 0.88 0.0024
2022-07-28 2022-06-30 13F REGENERON PHARMACEUTICALS COM US LARGE-CAP EQUITIES 75886F107 193 26 15.57 114 -2.56 0.0023
2022-04-29 2022-03-31 13F REGENERON PHARMACEUTICALS COM US LARGE-CAP EQUITIES 75886F107 167 -12 -6.70 117 3.54 0.0020
2022-01-19 2021-12-31 13F REGENERON PHARMACEUTICALS COM US LARGE-CAP EQUITIES 75886F107 179 141 371.05 113 391.30 0.0018
2021-11-01 2021-09-30 13F REGENERON PHARMACEUTICALS COM US LARGE-CAP EQUITIES 75886F107 38 0 0.00 23 9.52 0.0004
2021-07-29 2021-06-30 13F REGENERON PHARMACEUTICALS COM US LARGE-CAP EQUITIES 75886F107 38 -17 -30.91 21 -19.23 0.0004
2021-04-26 2021-03-31 13F REGENERON PHARMACEUTICALS COM US LARGE-CAP EQUITIES 75886F107 55 0 0.00 26 -3.70 0.0005
2021-01-29 2020-12-31 13F REGENERON PHARMACEUTICALS COM US LARGE-CAP EQUITIES 75886F107 55 -14 -20.29 27 -30.77 0.0006
2020-10-30 2020-09-30 13F REGENERON PHARMACEUTICALS COM US LARGE-CAP EQUITIES 75886F107 69 -15 -17.86 39 -26.42 0.0009
2020-07-10 2020-06-30 13F REGENERON PHARMACEUTICALS COM US LARGE-CAP EQUITIES 75886F107 84 28 50.00 53 96.30 0.0015
2020-04-27 2020-03-31 13F REGENERON PHARMACEUTICALS COM US LARGE-CAP EQUITIES 75886F107 56 -24 -30.00 27 -10.00 0.0009
2020-01-31 2019-12-31 13F REGENERON PHARMACEUTICALS COM US LARGE-CAP EQUITIES 75886F107 80 -137 -63.13 30 -50.00 0.0008
2019-10-18 2019-09-30 13F REGENERON PHARMACEUTICALS COM US LARGE-CAP EQUITIES 75886F107 217 194 843.48 60 757.14 0.0017
2019-07-23 2019-06-30 13F REGENERON PHARMACEUTICALS COM US LARGE-CAP EQUITIES 75886F107 23 0 0.00 7 -22.22 0.0002
2019-04-29 2019-03-31 13F REGENERON PHARMACEUTICALS COM US LARGE-CAP EQUITIES 75886F107 23 -45 -66.18 9 -64.00 0.0003
2019-02-07 2018-12-31 13F REGENERON PHARMACEUTICALS COM US LARGE-CAP EQUITIES 75886F107 68 45 195.65 25 177.78 0.0009
2018-10-23 2018-09-30 13F REGENERON PHARMACEUTICALS COM US LARGE-CAP EQUITIES 75886F107 23 0 0.00 9 12.50 0.0003
2018-07-27 2018-06-30 13F/A-1 REGENERON PHARMACEUTICALS COM US LARGE-CAP EQUITIES 75886F107 23 -35 -60.34 8 -60.00 0.0003
2018-07-20 2018-06-30 13F REGENERON PHARMACEUTICALS COM US LARGE CAP EQUITIES 75886F107 26 -32 7
2018-05-01 2018-03-31 13F REGENERON PHARMACEUTICALS COM US LARGE-CAP EQUITIES 75886F107 58 0 0.00 20 -9.09 0.0007
2018-02-07 2017-12-31 13F REGENERON PHARMACEUTICALS COM US LARGE-CAP EQUITIES 75886F107 58 -24 -29.27 22 -40.54 0.0008
2017-10-23 2017-09-30 13F REGENERON PHARMACEUTICALS COM US LARGE-CAP EQUITIES 75886F107 82 47 134.29 37 117.65 0.0013
2017-07-20 2017-06-30 13F REGENERON PHARMACEUTICALS COM US LARGE-CAP EQUITIES 75886F107 35 0 0.00 17 21.43 0.0007
2017-04-26 2017-03-31 13F REGENERON PHARMACEUTICALS US LARGE CAP EQUITIES 75886F107 35 35 14 0.0006
2017-01-18 2016-12-31 13F REGENERON PHARMACEUTICALS COM US LARGE CAP EQUITIES 75886F107 0 -26 -100.00 0 -100.00
2016-11-10 2016-09-30 13F REGENERON PHARMACEUTICALS COM US LARGE CAP EQUITIES 75886F107 26 0 0.00 10 11.11 0.0004
2016-07-28 2016-06-30 13F REGENERON PHARMACEUTICALS COM US LARGE CAP EQUITIES 75886F107 26 0 0.00 9 0.00 0.0004
2016-04-28 2016-03-31 13F REGENERON PHARMACEUTICALS COM US LARGE CAP EQUITIES 75886F107 26 0 0.00 9 -35.71 0.0004
2016-02-10 2015-12-31 13F REGENERON PHARMACEUTICALS COM US LARGE CAP EQUITIES 75886F107 26 0 0.00 14 16.67 0.0006
2015-11-12 2015-09-30 13F REGENERON PHARMACEUTICALS COM US LARGE CAP EQUITIES 75886F107 26 0 0.00 12 -7.69 0.0006
2015-08-13 2015-06-30 13F REGENERON PHARMACEUTICALS COM US LARGE CAP EQUITIES 75886F107 26 0 0.00 13 8.33 0.0006
2015-05-05 2015-03-31 13F REGENERON PHARMACEUTICALS COM US LARGE CAP EQUITIES 75886F107 26 26 0.00 12 0.0006
2015-02-04 2014-12-31 13F REGENERON PHARMACEUTICALS COM US LARGE CAP EQUITIES 75886F107 0 -26 -100.00 0 -100.00
2014-11-07 2014-09-30 13F REGENERON PHARMACEUTICALS COM US LARGE CAP EQUITIES 75886F107 26 0 0.00 9 28.57 0.0004
2014-08-04 2014-06-30 13F REGENERON PHARMACEUTICALS COM US LARGE CAP EQUITIES 75886F107 26 0 0.00 7 -12.50 0.0003
2014-05-01 2014-03-31 13F REGENERON PHARMACEUTICALS COM US LARGE CAP EQUITIES 75886F107 26 26 8 0.0004
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.