Regeneron Pharmaceuticals, Inc.
US ˙ NasdaqGS ˙ US75886F1075

SecurityREGN / Regeneron Pharmaceuticals, Inc.
InstitutionAllworth Financial LP
Latest Disclosed Ownership2,991 shares
Latest Disclosed Value $ 2,311,131
Allworth Financial LP reports 37.01% increase in ownership of REGN / Regeneron Pharmaceuticals, Inc.

On May 14, 2026 - Allworth Financial LP filed a 13F-HR form disclosing ownership of 2,991 shares of Regeneron Pharmaceuticals, Inc. (US:REGN) valued at $2,310,966 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 2,183 shares of Regeneron Pharmaceuticals, Inc.. This represents a change in shares of 37.01% during the quarter. The current value of the position is $1,851,279 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)
2026-05-14 2026-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,991 808 37.01 2,311 37.15 0.0094
2026-02-05 2025-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,183 687 45.92 1,685 100.60 0.0069
2025-12-02 2025-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,496 502 50.50 841 60.92 0.0037
2025-08-07 2025-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 994 173 21.07 522 6.10 0.0025
2025-04-30 2025-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 821 -137 -14.30 493 -24.42 0.0028
2025-01-30 2024-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 958 249 35.12 651 -12.62 0.0036
2024-10-23 2024-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 709 48 7.26 745 6.13 0.0045
2024-07-24 2024-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 661 133 25.19 703 38.19 0.0045
2024-04-25 2024-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 528 166 45.86 508 60.25 0.0036
2024-01-24 2023-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 362 4 1.12 318 7.82 0.0024
2023-10-31 2023-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 358 16 4.68 295 20.00 0.0025
2023-07-18 2023-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 342 179 109.82 246 84.21 0.0021
2023-04-18 2023-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 163 24 17.27 134 33.00 0.0013
2023-01-13 2022-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 139 10 7.75 100 12.36 0.0011
2022-11-14 2022-09-30 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 129 37 40.22 89 64.81 0.0011
2022-10-18 2022-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 129 37 89 0.0011
2022-07-13 2022-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 92 45 95.74 54 63.64 0.0007
2022-04-22 2022-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 47 -8 -14.55 33 -5.71 0.0004
2022-01-21 2021-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 55 23 71.88 35 84.21 0.0005
2021-11-02 2021-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 32 32 19 0.0003
2021-08-02 2021-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 0 -36 -100.00 0 -100.00
2021-04-29 2021-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 36 0 0.00 17 0.00 0.0003
2021-01-26 2020-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 36 0 0.00 17 -15.00 0.0004
2020-11-03 2020-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 36 0 0.00 20 -9.09 0.0006
2020-07-24 2020-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 36 36 22 0.0007
2017-08-07 2017-06-30 13F REGENERON PHARMACEUTICAL COM 75886F107 0 -4 -100.00 0 -100.00
2017-05-09 2017-03-31 13F REGENERON PHARMACEUTICAL COM 75886F107 4 4 2 0.0002
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.