Regeneron Pharmaceuticals, Inc.
MX ˙ BMV ˙ US75886F1075
SecurityMX:REGN / Regeneron Pharmaceuticals, Inc.
InstitutionMercer Global Advisors Inc /adv
Latest Disclosed Ownership20,053 shares
Latest Disclosed Value $ 15,493,380
Mercer Global Advisors Inc /adv reports 32.49% increase in ownership of REGN / Regeneron Pharmaceuticals, Inc.

On May 15, 2026 - Mercer Global Advisors Inc /adv filed a 13F-HR form disclosing ownership of 20,053 shares of Regeneron Pharmaceuticals, Inc. (MX:REGN) valued at $15,493,380 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 15,136 shares of Regeneron Pharmaceuticals, Inc.. This represents a change in shares of 32.49% 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)
2026-05-15 2026-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 20,053 4,917 32.49 15,493 32.61 0.0229
2026-02-17 2025-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 15,136 2,796 22.66 11,683 68.39 0.0178
2025-11-14 2025-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 12,340 6,630 116.11 6,938 131.50 0.0116
2025-08-14 2025-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 5,710 -2,720 -32.27 2,998 -43.94 0.0061
2025-05-15 2025-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 8,430 -14,954 -63.95 5,347 -67.90 0.0123
2025-02-14 2024-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 23,384 -2,389 -9.27 16,657 -38.27 0.0406
2024-11-14 2024-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 25,773 1,454 5.98 26,982 5.90 0.0631
2024-08-12 2024-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 24,319 1,122 4.84 25,479 115,713.64 0.0695
2024-05-15 2024-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 23,197 1,328 6.07 22 15.79 0.0635
2024-02-15 2023-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 21,869 869 4.14 19 11.76 0.0578
2023-11-15 2023-09-30 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 21,000 1,713 8.88 17 30.77 0.0656
2023-11-14 2023-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 21,000 1,713 17 0.0656
2023-08-14 2023-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 19,287 883 4.80 14 -13.33 0.0550
2023-05-16 2023-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 18,404 -489 -2.59 15 15.38 0.0687
2023-02-09 2022-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 18,893 1,218 6.89 14 -99.89 0.0683
2022-11-15 2022-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 17,675 1,480 9.14 12,176 27.19 0.0723
2022-08-10 2022-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 16,195 2,806 20.96 9,573 2.37 0.0586
2022-05-10 2022-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 13,389 5,423 68.08 9,351 85.87 0.0551
2022-02-04 2021-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 7,966 4,264 115.18 5,031 124.60 0.0311
2021-11-10 2021-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 3,702 87 2.41 2,240 10.95 0.0156
2021-08-10 2021-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 3,615 -2,447 -40.37 2,019 -29.60 0.0155
2021-08-10 2021-03-31 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 6,062 1,710 39.29 2,868 36.44 0.0261
2021-05-11 2021-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 6,062 1,710 2,868 0.0275
2021-02-12 2020-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 4,352 1,788 69.73 2,102 46.48 0.0263
2020-12-10 2020-09-30 13F REGENERON PHARMACEUTICALS COM COM 75886F107 2,564 1,758 218.11 1,435 185.29 0.0216
2020-08-10 2020-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 806 6 0.75 503 28.64 0.0091
2020-05-18 2020-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 800 84 11.73 391 45.35 0.0086
2020-02-13 2019-12-31 13F REGENERON PHARMACEUTICALS COM COM 75886F107 716 716 269 0.0054
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.