Regeneron Pharmaceuticals, Inc.
MX ˙ BMV ˙ US75886F1075
SecurityMX:REGN / Regeneron Pharmaceuticals, Inc.
InstitutionAncora Advisors, LLC
Latest Disclosed Ownership105 shares
Latest Disclosed Value $ 81,127
Ancora Advisors, LLC ownership in REGN / Regeneron Pharmaceuticals, Inc.

On May 15, 2026 - Ancora Advisors, LLC filed a 13F-HR form disclosing ownership of 105 shares of Regeneron Pharmaceuticals, Inc. (MX:REGN) valued at $81,127 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 105 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)
2026-05-15 2026-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 105 0 0.00 81 0.00 0.0010
2026-02-17 2025-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 105 45 75.00 81 145.45 0.0017
2025-11-14 2025-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 60 0 0.00 34 6.45 0.0007
2025-08-14 2025-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 60 -1 -1.64 32 -18.42 0.0007
2025-05-15 2025-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 61 -9 -12.86 39 -22.45 0.0009
2025-02-14 2024-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 70 -86 -55.13 50 -69.94 0.0011
2024-11-14 2024-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 156 1 0.65 164 0.62 0.0037
2024-08-14 2024-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 155 0 0.00 163 8.72 0.0040
2024-05-16 2024-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 155 0 0.00 149 9.56 0.0034
2024-02-14 2023-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 155 -37 -19.27 136 -13.92 0.0032
2023-11-14 2023-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 192 -13 -6.34 158 7.48 0.0042
2023-08-14 2023-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 205 8 4.06 147 -8.70 0.0039
2023-05-16 2023-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 197 40 25.48 162 42.48 0.0046
2023-02-14 2022-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 157 2 1.29 113 5.61 0.0033
2022-11-14 2022-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 155 0 0.00 107 16.30 0.0033
2022-08-15 2022-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 155 -2 -1.27 92 -16.36 0.0026
2022-05-16 2022-03-31 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 157 -17 -9.77 110 0.00 0.0027
2022-05-13 2022-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 264 90 125 0.0022
2022-02-14 2021-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 174 17 10.83 110 15.79 0.0026
2021-11-15 2021-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 157 -12 -7.10 95 1.06 0.0025
2021-11-12 2021-06-30 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 169 -95 -35.98 94 -24.80 0.0025
2021-08-13 2021-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 169 -95 94 0.0025
2021-11-12 2021-03-31 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 264 0 0.00 125 -2.34 0.0035
2021-05-14 2021-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 264 0 125 0.0035
2021-11-12 2020-12-31 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 264 0 0.00 128 -13.51 0.0041
2021-02-12 2020-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 264 0 128 0.0041
2021-11-12 2020-09-30 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 264 14 5.60 148 -5.13 0.0059
2020-11-13 2020-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 264 14 148 0.0059
2021-11-12 2020-06-30 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 250 10 4.17 156 33.33 0.0065
2020-08-14 2020-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 250 10 156 0.0065
2021-11-12 2020-03-31 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 240 50 26.32 117 64.79 0.0054
2020-05-14 2020-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 240 50 117 0.0054
2020-02-14 2019-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 190 190 71 0.0026
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.