Regeneron Pharmaceuticals, Inc.
MX ˙ BMV ˙ US75886F1075
SecurityMX:REGN / Regeneron Pharmaceuticals, Inc.
InstitutionHowland Capital Management Llc
Latest Disclosed Ownership39,345 shares
Latest Disclosed Value $ 30,399,521
Howland Capital Management Llc reports 3.92% increase in ownership of REGN / Regeneron Pharmaceuticals, Inc.

On April 14, 2026 - Howland Capital Management Llc filed a 13F-HR form disclosing ownership of 39,345 shares of Regeneron Pharmaceuticals, Inc. (MX:REGN) valued at $30,399,521 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 37,860 shares of Regeneron Pharmaceuticals, Inc.. This represents a change in shares of 3.92% 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)
2026-04-14 2026-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 39,345 1,485 3.92 30,400 4.03 1.2014
2026-02-12 2025-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 37,860 2,175 6.09 29,223 45.64 1.1115
2025-10-29 2025-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 35,685 3,890 12.23 20,065 20.20 0.7644
2025-08-15 2025-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 31,795 5,107 19.14 16,692 -1.38 0.6800
2025-05-08 2025-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 26,688 11,251 72.88 16,926 53.93 0.7545
2025-01-28 2024-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 15,437 14,179 1,127.11 10,996 731.77 0.4816
2024-11-12 2024-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,258 -57 -4.33 1,322 -4.34 0.0573
2024-08-12 2024-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,315 -18 -1.35 1,382 7.72 0.0660
2024-05-03 2024-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,333 0 0.00 1,283 9.66 0.0619
2024-01-23 2023-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,333 -8 -0.60 1,171 6.07 0.0619
2023-10-17 2023-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,341 -8 -0.59 1,104 13.83 0.0644
2023-07-28 2023-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,349 -4 -0.30 969 -12.78 0.0556
2023-05-05 2023-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,353 -83 -5.78 1,112 7.24 0.0671
2023-01-30 2022-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,436 -40 -2.71 1,036 1.87 0.0639
2022-10-17 2022-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,476 532 56.36 1,017 82.26 0.0654
2022-07-22 2022-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 944 -15 -1.56 558 -16.72 0.0343
2022-04-27 2022-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 959 90 10.36 670 22.04 0.0361
2022-01-26 2021-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 869 -38 -4.19 549 0.00 0.0279
2021-10-25 2021-09-30 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 907 0 0.00 549 8.28 0.0289
2021-10-25 2021-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 907 0 549 0.0289
2021-07-28 2021-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 907 -5 -0.55 507 17.36 0.0262
2021-04-28 2021-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 912 93 11.36 432 9.09 0.0241
2021-01-26 2020-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 819 0 0.00 396 -13.54 0.0232
2020-10-26 2020-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 819 0 0.00 458 -10.37 0.0302
2020-07-15 2020-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 819 -60 -6.83 511 19.11 0.0366
2020-04-27 2020-03-31 13F/A-02 REGENERON PHARMACEUTICALS COM 75886F107 879 -88 -9.10 429 18.18 0.0376
2020-04-13 2020-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 879 -88 429 38,414.3557
2020-01-23 2019-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 967 967 363 0.0258
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.