Regeneron Pharmaceuticals, Inc.
MX ˙ BMV ˙ US75886F1075
SecurityMX:REGN / Regeneron Pharmaceuticals, Inc.
InstitutionUSS Investment Management Ltd
Latest Disclosed Ownership20,230 shares
Latest Disclosed Value $ 15,625,551
USS Investment Management Ltd reports 4.74% increase in ownership of REGN / Regeneron Pharmaceuticals, Inc.

On April 24, 2026 - USS Investment Management Ltd filed a 13F-HR form disclosing ownership of 20,230 shares of Regeneron Pharmaceuticals, Inc. (MX:REGN) valued at $15,625,551 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 19,315 shares of Regeneron Pharmaceuticals, Inc.. This represents a change in shares of 4.74% 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)
2026-04-24 2026-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 20,230 915 4.74 15,626 4.77 0.0611
2026-02-13 2025-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 19,315 1,035 5.66 14,914 45.04 0.0693
2025-11-13 2025-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 18,280 0 0.00 10,282 7.20 0.0468
2025-08-14 2025-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 18,280 78 0.43 9,591 -16.87 0.0568
2025-05-15 2025-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 18,202 0 0.00 11,538 -11.03 0.0843
2025-02-14 2024-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 18,202 -1,440 -7.33 12,969 -37.25 0.0905
2024-11-13 2024-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 19,642 -282 -1.42 20,666 -1.36 0.1506
2024-08-14 2024-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 19,924 398 2.04 20,952 11.52 0.1667
2024-05-15 2024-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 19,526 402 2.10 18,787 11.84 0.1537
2024-02-14 2023-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 19,124 -889 -4.44 16,798 2.00 0.1496
2023-11-14 2023-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 20,013 857 4.47 16,469 19.59 0.1784
2023-08-14 2023-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 19,156 253 1.34 13,770 -11.32 0.1626
2023-05-15 2023-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 18,903 337 1.82 15,527 15.90 0.2112
2023-02-13 2022-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 18,566 358 1.97 13,398 6.73 0.1876
2022-11-08 2022-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 18,208 -5,344 -22.69 12,552 -9.86 0.1834
2022-08-12 2022-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 23,552 -1,577 -6.28 13,925 -20.70 0.1391
2022-07-18 2022-03-31 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 25,129 877 3.62 17,559 14.60 0.1439
2022-05-13 2022-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 25,129 877 17,559 0.1470
2022-02-14 2021-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 24,252 0 0.00 15,322 4.44 0.1160
2021-11-15 2021-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 24,252 18,204 300.99 14,670 334.15 0.1238
2021-08-10 2021-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 6,048 0 0.00 3,379 18.06 0.0267
2021-05-12 2021-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 6,048 0 0.00 2,862 -1.99 0.0247
2021-02-12 2020-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 6,048 -700 -10.37 2,920 -22.67 0.0265
2020-10-30 2020-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 6,748 0 0.00 3,776 -10.20 0.0364
2020-08-11 2020-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 6,748 6,748 4,205 0.0439
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.