Regeneron Pharmaceuticals, Inc.
MX ˙ BMV ˙ US75886F1075
SecurityMX:REGN / Regeneron Pharmaceuticals, Inc.
InstitutionWilliams Jones Wealth Management, LLC.
Latest Disclosed Ownership810 shares
Latest Disclosed Value $ 625,838
Williams Jones Wealth Management, LLC. reports 1.10% decrease in ownership of REGN / Regeneron Pharmaceuticals, Inc.

On May 5, 2026 - Williams Jones Wealth Management, LLC. filed a 13F-HR form disclosing ownership of 810 shares of Regeneron Pharmaceuticals, Inc. (MX:REGN) valued at $625,838 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 819 shares of Regeneron Pharmaceuticals, Inc.. This represents a change in shares of -1.10% 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.

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)
2026-05-05 2026-03-31 13F REGENERON PHARMACEUTICALS COM CS 75886F107 810 -9 -1.10 626 -1.11 0.0054
2026-02-13 2025-12-31 13F REGENERON PHARMACEUTICALS COM CS 75886F107 819 2 0.24 632 37.69 0.0071
2025-11-14 2025-09-30 13F REGENERON PHARMACEUTICALS COM CS 75886F107 817 -161 -16.46 459 -10.53 0.0053
2025-08-14 2025-06-30 13F REGENERON PHARMACEUTICALS COM CS 75886F107 978 -95 -8.85 513 -24.56 0.0061
2025-05-15 2025-03-31 13F REGENERON PHARMACEUTICALS COM CS 75886F107 1,073 -25 -2.28 681 -13.04 0.0087
2025-02-14 2024-12-31 13F REGENERON PHARMACEUTICALS COM CS 75886F107 1,098 -715 -39.44 782 -58.95 0.0094
2024-11-14 2024-09-30 13F REGENERON PHARMACEUTICALS COM CS 75886F107 1,813 -2 -0.11 1,906 -0.10 0.0223
2024-08-05 2024-06-30 13F REGENERON PHARMACEUTICALS COM CS 75886F107 1,815 36 2.02 1,908 11.39 0.0237
2024-05-07 2024-03-31 13F REGENERON PHARMACEUTICALS COM CS 75886F107 1,779 58 3.37 1,712 13.30 0.0218
2024-02-14 2023-12-31 13F REGENERON PHARMACEUTICALS COM CS 75886F107 1,721 -85 -4.71 1,512 1.68 0.0212
2023-11-14 2023-09-30 13F REGENERON PHARMACEUTICALS COM CS 75886F107 1,806 70 4.03 1,486 19.17 0.0228
2023-08-14 2023-06-30 13F REGENERON PHARMACEUTICALS COM CS 75886F107 1,736 0 0.00 1,247 -12.55 0.0187
2023-05-15 2023-03-31 13F REGENERON PHARMACEUTICALS COM CS 75886F107 1,736 0 0.00 1,427 13.90 0.0223
2023-02-14 2022-12-31 13F REGENERON PHARMACEUTICALS COM CS 75886F107 1,736 0 0.00 1,253 4.68 0.0210
2022-11-14 2022-09-30 13F REGENERON PHARMACEUTICALS COM CS 75886F107 1,736 0 0.00 1,196 16.57 0.0208
2022-08-15 2022-06-30 13F REGENERON PHARMACEUTICALS COM CS 75886F107 1,736 15 0.87 1,026 -14.64 0.0166
2022-05-16 2022-03-31 13F REGENERON PHARMACEUTICALS COM CS 75886F107 1,721 -1 -0.06 1,202 10.58 0.0167
2022-02-14 2021-12-31 13F REGENERON PHARMACEUTICALS COM CS 75886F107 1,722 42 2.50 1,087 6.88 0.0136
2021-11-15 2021-09-30 13F REGENERON PHARMACEUTICALS COM CS 75886F107 1,680 -12 -0.71 1,017 7.62 0.0142
2021-08-16 2021-06-30 13F REGENERON PHARMACEUTICALS COM CS 75886F107 1,692 -192 -10.19 945 6.06 0.0132
2021-05-17 2021-03-31 13F REGENERON PHARMACEUTICALS COM CS 75886F107 1,884 39 2.11 891 0.00 0.0139
2021-02-16 2020-12-31 13F REGENERON PHARMACEUTICALS COM CS 75886F107 1,845 380 25.94 891 8.66 0.0145
2020-11-13 2020-09-30 13F REGENERON PHARMACEUTICALS COM CS 75886F107 1,465 256 21.17 820 8.75 0.0152
2020-08-14 2020-06-30 13F REGENERON PHARMACEUTICALS COM CS 75886F107 1,209 1,209 754 0.0154
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.