Regeneron Pharmaceuticals, Inc.
MX ˙ BMV ˙ US75886F1075
SecurityMX:REGN / Regeneron Pharmaceuticals, Inc.
InstitutionCzech National Bank
Latest Disclosed Ownership27,453 shares
Latest Disclosed Value $ 21,211,286
Czech National Bank reports 3.30% increase in ownership of REGN / Regeneron Pharmaceuticals, Inc.

On April 13, 2026 - Czech National Bank filed a 13F-HR form disclosing ownership of 27,453 shares of Regeneron Pharmaceuticals, Inc. (MX:REGN) valued at $21,211,286 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 12, 2026 disclosing 26,575 shares of Regeneron Pharmaceuticals, Inc.. This represents a change in shares of 3.30% 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)
2026-04-13 2026-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 27,453 878 3.30 21,211 3.41 0.1393
2026-01-12 2025-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 26,575 702 2.71 20,512 41.01 0.1331
2025-10-08 2025-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 25,873 489 1.93 14,548 9.16 0.1004
2025-07-09 2025-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 25,384 1,220 5.05 13,327 -13.04 0.1038
2025-04-09 2025-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 24,164 1,338 5.86 15,326 -5.74 0.1403
2025-01-13 2024-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 22,826 1,209 5.59 16,260 -28.45 0.1506
2024-10-07 2024-09-30 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 21,617 1,405 6.95 22,725 6.97 0.2291
2024-10-03 2024-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 21,617 1,405 22,725 0.2291
2024-07-15 2024-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 20,212 1,624 8.74 21,243 18.74 0.2432
2024-04-10 2024-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 18,588 -178 -0.95 17,891 8.55 0.2307
2024-01-08 2023-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 18,766 109 0.58 16,482 7.35 0.2350
2023-10-19 2023-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 18,657 5,885 46.08 15,354 67.30 0.2444
2023-07-11 2023-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 12,772 107 0.84 9,177 -11.81 0.2086
2023-04-17 2023-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 12,665 131 1.05 10,406 15.07 0.2572
2023-01-18 2022-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 12,534 77 0.62 9,043 5.38 0.2404
2022-10-31 2022-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 12,457 12,457 8,581 0.2452
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.