Regeneron Pharmaceuticals, Inc.
US ˙ NasdaqGS ˙ US75886F1075

SecurityREGN / Regeneron Pharmaceuticals, Inc.
InstitutionWetherby Asset Management Inc
Latest Disclosed Ownership2,518 shares
Latest Disclosed Value $ 1,415,797
Wetherby Asset Management Inc reports 0.47% decrease in ownership of REGN / Regeneron Pharmaceuticals, Inc.

On November 14, 2025 - Wetherby Asset Management Inc filed a 13F-HR form disclosing ownership of 2,518 shares of Regeneron Pharmaceuticals, Inc. (US:REGN) valued at $1,415,796 USD as of September 30, 2025. The entity filed a previous 13F-HR on August 14, 2025 disclosing 2,530 shares of Regeneron Pharmaceuticals, Inc.. This represents a change in shares of -0.47% during the quarter. The current value of the position is $1,600,063 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.

Upgrade to unlock premium data and export to Excel .

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)
2025-11-14 2025-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,518 -12 -0.47 1,416 6.55 0.0578
2025-08-14 2025-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,530 204 8.77 1,328 -19.81 0.0591
2025-02-14 2024-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,326 -164 -6.59 1,657 -36.72 0.0794
2024-11-14 2024-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,490 -31 -1.23 2,618 -1.21 0.1197
2024-08-14 2024-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,521 -43 -1.68 2,650 7.38 0.1249
2024-05-15 2024-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,564 -34 -1.31 2,468 8.15 0.1176
2024-02-14 2023-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,598 -11 -0.42 2,282 6.24 0.1189
2023-11-14 2023-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,609 -35 -1.32 2,147 13.06 0.1217
2023-08-14 2023-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,644 -109 -3.96 1,900 -16.05 0.1023
2023-05-12 2023-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,753 126 4.80 2,262 19.37 0.1324
2023-02-14 2022-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,627 135 5.42 1,895 10.37 0.1217
2022-11-14 2022-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,492 240 10.66 1,717 29.00 0.1211
2022-08-15 2022-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,252 -166 -6.87 1,331 -21.20 0.0909
2022-05-16 2022-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,418 108 4.68 1,689 15.76 0.0968
2022-02-14 2021-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,310 47 2.08 1,459 6.57 0.0819
2021-11-15 2021-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,263 40 1.80 1,369 10.23 0.0845
2021-08-16 2021-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,223 254 12.90 1,242 33.40 0.0758
2021-05-14 2021-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,969 -245 -11.07 931 -12.99 0.0710
2021-02-11 2020-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,214 123 5.88 1,070 -8.55 0.0726
2020-12-16 2020-09-30 13F/A-01 REGENERON PHARMACEUTICALS COM 75886F107 2,091 62 3.06 1,170 -7.51 0.1072
2020-11-13 2020-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,323 294 1,301 82,755.0235
2020-08-14 2020-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,029 197 10.75 1,265 41.34 0.1199
2020-05-06 2020-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,832 318 21.00 895 57.29 0.1005
2020-01-28 2019-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,514 541 55.60 569 110.74 0.0560
2019-10-31 2019-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 973 -109 -10.07 270 -20.12 0.0282
2019-07-25 2019-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,082 -481 -30.77 338 -47.35 0.0370
2019-07-25 2019-03-31 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 1,563 -15 -0.95 642 9.00 0.0799
2019-05-09 2019-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,563 -15 642
2019-01-30 2018-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,578 235 17.50 589 8.47 0.0833
2018-11-07 2018-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,343 444 49.39 543 75.16 0.0671
2018-07-24 2018-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 899 -114 -11.25 310 -11.17 0.0420
2018-05-04 2018-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,013 -676 -40.02 349 -45.04 0.0482
2018-02-09 2017-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,689 99 6.23 635 -10.69 0.0881
2017-11-13 2017-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,590 10 0.63 711 -8.38 0.1058
2017-08-01 2017-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,580 320 25.40 776 59.02 0.1320
2017-04-27 2017-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,260 133 11.80 488 17.87 0.0878
2017-02-08 2016-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,127 -71 -5.93 414 -14.11 0.0811
2016-11-14 2016-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,198 402 50.50 482 73.38 0.0975
2016-08-10 2016-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 796 18 2.31 278 -0.71 0.0616
2016-05-10 2016-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 778 -112 -12.58 280 -42.03 0.0660
2016-02-08 2015-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 890 68 8.27 483 26.11 0.1158
2015-11-12 2015-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 822 179 27.84 383 16.77 0.0981
2015-08-12 2015-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 643 106 19.74 328 35.54 0.0789
2015-05-08 2015-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 537 43 8.70 242 19.21 0.0589
2015-02-12 2014-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 494 494 203 0.0511
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.