Regeneron Pharmaceuticals, Inc.
MX ˙ BMV ˙ US75886F1075
SecurityMX:REGN / Regeneron Pharmaceuticals, Inc.
InstitutionCAPROCK Group, Inc.
Latest Disclosed Ownership2,768 shares
Latest Disclosed Value $ 2,138,819
CAPROCK Group, Inc. reports 4.58% decrease in ownership of REGN / Regeneron Pharmaceuticals, Inc.

On May 11, 2026 - CAPROCK Group, Inc. filed a 13F-HR form disclosing ownership of 2,768 shares of Regeneron Pharmaceuticals, Inc. (MX:REGN) valued at $2,138,819 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 28, 2026 disclosing 2,901 shares of Regeneron Pharmaceuticals, Inc.. This represents a change in shares of -4.58% 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)
2026-05-11 2026-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,768 -133 -4.58 2,139 -4.51 0.0519
2026-01-28 2025-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,901 373 14.75 2,239 52.31 0.0473
2025-11-06 2025-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,528 1,333 111.55 1,471 94.19 0.0362
2025-05-15 2025-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,195 -452 -27.44 758 -35.46 0.0231
2025-01-23 2024-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,647 351 27.08 1,173 -13.88 0.0383
2024-11-07 2024-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,296 -90 -6.49 1,362 -6.46 0.0496
2024-08-06 2024-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,386 521 60.23 1,457 75.00 0.0592
2024-04-29 2024-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 865 68 8.53 833 19.03 0.0477
2024-01-18 2023-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 797 -153 -16.11 700 -10.50 0.0447
2023-10-18 2023-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 950 -148 -13.48 782 -0.89 0.0592
2023-08-10 2023-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,098 188 20.66 789 5.49 0.0579
2023-04-26 2023-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 910 240 35.82 748 54.66 0.0579
2023-01-23 2022-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 670 132 24.54 483 30.19 0.0450
2022-11-07 2022-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 538 66 13.98 371 32.97 0.0357
2022-07-26 2022-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 472 -5 -1.05 279 -16.22 0.0274
2022-04-12 2022-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 477 40 9.15 333 20.65 0.0313
2022-01-18 2021-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 437 -13 -2.89 276 1.47 0.0228
2021-10-07 2021-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 450 44 10.84 272 19.82 0.0243
2021-08-13 2021-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 406 406 227 0.0207
2021-04-29 2021-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 0 -426 -100.00 0 -100.00
2021-01-29 2020-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 426 -146 -25.52 206 -35.62 0.0235
2020-10-29 2020-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 572 156 37.50 320 23.55 0.0438
2020-08-05 2020-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 416 416 259 0.0389
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.