Regeneron Pharmaceuticals, Inc.
MX ˙ BMV ˙ US75886F1075
SecurityMX:REGN / Regeneron Pharmaceuticals, Inc.
InstitutionD.a. Davidson & Co.
Latest Disclosed Ownership525 shares
Latest Disclosed Value $ 405,636
D.a. Davidson & Co. reports 3.49% decrease in ownership of REGN / Regeneron Pharmaceuticals, Inc.

On May 5, 2026 - D.a. Davidson & Co. filed a 13F-HR form disclosing ownership of 525 shares of Regeneron Pharmaceuticals, Inc. (MX:REGN) valued at $405,636 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 29, 2026 disclosing 544 shares of Regeneron Pharmaceuticals, Inc.. This represents a change in shares of -3.49% 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)
2026-05-05 2026-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 525 -19 -3.49 406 -3.34 0.0025
2026-01-29 2025-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 544 -66 -10.82 420 22.51 0.0026
2025-10-22 2025-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 610 1 0.16 343 7.21 0.0022
2025-07-30 2025-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 609 -123 -16.80 320 -31.25 0.0023
2025-04-28 2025-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 732 -21 -2.79 464 -13.43 0.0037
2025-01-31 2024-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 753 -68 -8.28 536 -37.89 0.0044
2024-11-13 2024-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 821 40 5.12 863 5.24 0.0071
2024-08-01 2024-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 781 72 10.16 821 20.23 0.0073
2024-05-13 2024-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 709 0 0.00 682 9.65 0.0061
2024-02-09 2023-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 709 103 17.00 623 24.90 0.0061
2023-11-08 2023-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 606 -301 -33.19 499 -23.50 0.0054
2023-08-11 2023-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 907 -116 -11.34 652 -22.50 0.0069
2023-04-25 2023-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,023 439 75.17 841 99.52 0.0095
2023-02-03 2022-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 584 -14 -2.34 421 2.18 0.0050
2022-11-07 2022-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 598 57 10.54 412 28.75 0.0054
2022-07-28 2022-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 541 -15 -2.70 320 -17.53 0.0040
2022-05-12 2022-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 556 58 11.65 388 23.57 0.0042
2022-01-31 2021-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 498 15 3.11 314 7.53 0.0033
2021-11-15 2021-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 483 -20 -3.98 292 3.91 0.0034
2021-08-10 2021-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 503 42 9.11 281 28.90 0.0033
2021-05-07 2021-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 461 461 218 0.0028
2017-11-08 2017-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 0 -105 -100.00 0 -100.00
2017-08-11 2017-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 105 -35 -25.00 51 -5.56 0.0012
2017-05-12 2017-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 140 -85 -37.78 54 -33.33 0.0013
2017-02-15 2016-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 225 36 19.05 81 8.00 0.0018
2016-11-18 2016-09-30 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 189 125 195.31 75 240.91 0.0019
2016-11-14 2016-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 189 75
2016-08-13 2016-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 64 24 60.00 22 57.14 0.0006
2016-05-13 2016-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 40 16 66.67 14 7.69 0.0004
2016-02-12 2015-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 24 7 41.18 13 85.71 0.0004
2015-11-13 2015-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 17 1 6.25 7 -12.50 0.0002
2015-08-14 2015-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 16 0 0.00 8 14.29 0.0003
2015-05-06 2015-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 16 9 128.57 7 250.00 0.0002
2015-02-12 2014-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 7 -35 -83.33 2 -85.71 0.0001
2014-11-12 2014-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 42 7 20.00 14 55.56 0.0005
2014-07-29 2014-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 35 0 0.00 9 -10.00 0.0003
2014-05-05 2014-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 35 -239 -87.23 10 -86.49 0.0004
2014-02-13 2013-12-31 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 274 274 74 0.0028
2014-02-12 2013-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 274 74 0.0028
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.