Regeneron Pharmaceuticals, Inc.
MX ˙ BMV ˙ US75886F1075
SecurityMX:REGN / Regeneron Pharmaceuticals, Inc.
InstitutionMoors & Cabot, Inc.
Latest Disclosed Ownership803 shares
Latest Disclosed Value $ 620,469
Moors & Cabot, Inc. reports 2.29% increase in ownership of REGN / Regeneron Pharmaceuticals, Inc.

On May 8, 2026 - Moors & Cabot, Inc. filed a 13F-HR form disclosing ownership of 803 shares of Regeneron Pharmaceuticals, Inc. (MX:REGN) valued at $620,469 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 785 shares of Regeneron Pharmaceuticals, Inc.. This represents a change in shares of 2.29% 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)
2026-05-08 2026-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 803 18 2.29 620 2.48 0.0266
2026-02-10 2025-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 785 72 10.10 606 51.25 0.0259
2025-11-14 2025-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 713 -5 -0.70 401 6.38 0.0175
2025-08-06 2025-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 718 -127 -15.03 377 -29.72 0.0175
2025-05-08 2025-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 845 60 7.64 536 -4.29 0.0272
2025-02-07 2024-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 785 -12 -1.51 559 -33.21 0.0266
2024-11-08 2024-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 797 -19 -2.33 838 -2.33 0.0416
2024-08-09 2024-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 816 -50 -5.77 858 2.88 0.0457
2024-05-08 2024-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 866 25 2.97 834 12.87 0.0452
2024-02-14 2023-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 841 2 0.24 739 6.96 0.0460
2023-11-08 2023-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 839 43 5.40 690 20.84 0.0468
2023-08-10 2023-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 796 2 0.25 572 -12.42 0.0380
2023-05-05 2023-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 794 7 0.89 652 14.99 0.0448
2023-02-10 2022-12-31 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 787 -9 -1.13 568 3.47 0.0396
2023-02-07 2022-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 982 186 620 0.0413
2022-11-08 2022-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 796 -65 -7.55 548 7.66 0.0418
2022-08-08 2022-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 861 -286 -24.93 509 -36.45 0.0366
2022-05-13 2022-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,147 -40 -3.37 801 6.80 0.0493
2022-02-14 2021-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,187 -168 -12.40 750 -8.31 0.0461
2021-12-08 2021-09-30 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 1,355 93 7.37 818 16.03 0.0514
2021-11-05 2021-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 55,000 53,738 61 0.0045
2021-08-10 2021-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,262 13 1.04 705 20.51 0.0494
2021-05-12 2021-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,249 440 54.39 585 52.34 0.0448
2021-02-11 2020-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 809 29 3.72 384 -12.13 0.0323
2020-11-09 2020-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 780 86 12.39 437 0.92 0.0411
2020-08-13 2020-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 694 150 27.57 433 64.02 0.0461
2020-05-12 2020-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 544 544 264 0.0384
2019-07-18 2019-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 0 -602 -100.00 0 -100.00
2019-05-01 2019-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 602 602 246 0.0162
2018-05-18 2018-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 0 -600 -100.00 0 -100.00
2018-02-13 2017-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 600 115 23.71 227 4.61 0.0301
2017-11-16 2017-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 485 485 217 0.0314
2016-08-08 2016-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 0 -1,935 -100.00 0 -100.00
2016-05-10 2016-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,935 -91 -4.49 711 -34.71 0.1283
2016-02-09 2015-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,026 -558 -21.59 1,089 -10.22 0.1994
2015-11-17 2015-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,584 178 7.40 1,213 -1.70 0.2241
2015-08-17 2015-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,406 41 1.73 1,234 14.26 0.2007
2015-05-14 2015-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,365 370 18.55 1,080 32.52 0.1802
2015-02-17 2014-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,995 -25 -1.24 815 11.64 0.1381
2014-11-12 2014-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,020 -100 -4.72 730 22.69 0.1242
2014-08-11 2014-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,120 2,120 595 0.1003
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.