Regeneron Pharmaceuticals, Inc.
MX ˙ BMV ˙ US75886F1075
SecurityMX:REGN / Regeneron Pharmaceuticals, Inc.
InstitutionPhiladelphia Trust Co
Latest Disclosed Ownership2,415 shares
Latest Disclosed Value $ 1,866
Philadelphia Trust Co ownership in REGN / Regeneron Pharmaceuticals, Inc.

On May 13, 2026 - Philadelphia Trust Co filed a 13F-HR form disclosing ownership of 2,415 shares of Regeneron Pharmaceuticals, Inc. (MX:REGN) valued at $1,866 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 2,415 shares of Regeneron Pharmaceuticals, Inc.. This represents a change in shares of 0.00% 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)
2026-05-13 2026-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,415 0 0.00 2 0.00 0.1317
2026-02-12 2025-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,415 0 0.00 2 0.00 0.1285
2025-11-13 2025-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,415 0 0.00 1 0.00 0.0956
2025-08-13 2025-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,415 0 0.00 1 0.00 0.0973
2025-05-13 2025-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,415 0 0.00 2 0.00 0.1312
2025-02-13 2024-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,415 0 0.00 2 -50.00 0.1262
2024-11-13 2024-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,415 1,250 107.30 3 100.00 0.1843
2024-08-13 2024-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,165 -8 -0.68 1 0.00 0.0951
2024-05-13 2024-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,173 15 1.30 1 0.00 0.0906
2024-02-09 2023-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,158 0 0.00 1 0.0955
2023-11-09 2023-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,158 0 0.00 1 0.0979
2023-08-07 2023-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,158 0 0.00 1 0.0788
2023-05-12 2023-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,158 0 0.00 1 0.0969
2023-02-07 2022-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,158 -250 -17.76 1 -100.00 0.0894
2022-11-10 2022-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,408 0 0.00 970 16.59 0.1097
2022-08-15 2022-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,408 -4,224 -75.00 832 -78.85 0.0854
2022-05-05 2022-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 5,632 4,232 302.29 3,934 345.02 0.3104
2022-02-09 2021-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,400 0 0.00 884 4.37 0.0640
2021-11-15 2021-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,400 0 0.00 847 8.31 0.0624
2021-08-13 2021-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,400 0 0.00 782 18.13 0.0539
2021-05-14 2021-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,400 1,400 662 0.0509
2020-11-12 2020-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 0 -404 -100.00 0 -100.00
2020-08-14 2020-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 404 -96 -19.20 252 3.28 0.0265
2020-05-12 2020-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 500 -1,058 -67.91 244 -58.29 0.0307
2020-02-10 2019-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,558 -93 -5.63 585 27.73 0.0502
2019-11-12 2019-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,651 0 0.00 458 -11.41 0.0425
2019-08-08 2019-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,651 1,651 517 0.0455
2019-02-13 2018-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 0 -650 -100.00 0 -100.00
2018-11-14 2018-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 650 650 263 0.0216
2018-02-14 2017-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 0 -19,136 -100.00 0 -100.00
2017-11-13 2017-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 19,136 17,056 820.00 8,556 737.18 0.7028
2017-08-14 2017-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,080 -500 -19.38 1,022 2.20 0.0869
2017-05-15 2017-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,580 0 0.00 1,000 5.60 0.0822
2017-03-29 2016-12-31 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 2,580 0 0.00 947 -8.68 0.0756
2017-02-10 2016-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,580 947
2016-11-14 2016-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,580 0 0.00 1,037 15.09 0.0897
2016-08-12 2016-06-30 13F REGENERON PHARMACEUTICALS SHS 75886F107 2,580 0 0.00 901 -3.12 0.0779
2016-05-13 2016-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,580 -625 -19.50 930 -46.70 0.0797
2016-02-09 2015-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 3,205 0 0.00 1,745 17.04 0.1462
2015-11-16 2015-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 3,205 1,075 50.47 1,491 37,175.00 0.1346
2015-08-14 2015-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,130 -3,020 -58.64 4 -99.83 0.0154
2015-05-14 2015-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 5,150 0 0.00 2,325 10.03 0.1773
2015-02-10 2014-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 5,150 0 0.00 2,113 13.79 0.1700
2014-11-13 2014-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 5,150 -1,975 -27.72 1,857 -7.75 0.1153
2014-08-13 2014-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 7,125 600 9.20 2,013 2.76 0.1251
2014-05-13 2014-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 6,525 5,525 552.50 1,959 612.36 0.1235
2014-02-14 2013-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,000 0 0.00 275 -12.14 0.0175
2013-11-15 2013-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,000 1,000 313 0.0216
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.