Regeneron Pharmaceuticals, Inc.
MX ˙ BMV ˙ US75886F1075
SecurityMX:REGN / Regeneron Pharmaceuticals, Inc.
InstitutionRockefeller Capital Management L.P.
Latest Disclosed Ownership28,520 shares
Latest Disclosed Value $ 22,036,303
Rockefeller Capital Management L.P. reports 5.42% increase in ownership of REGN / Regeneron Pharmaceuticals, Inc.

On May 14, 2026 - Rockefeller Capital Management L.P. filed a 13F-HR form disclosing ownership of 28,520 shares of Regeneron Pharmaceuticals, Inc. (MX:REGN) valued at $22,036,303 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on March 16, 2026 disclosing 27,053 shares of Regeneron Pharmaceuticals, Inc.. This represents a change in shares of 5.42% 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)
2026-05-14 2026-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 28,520 1,467 5.42 22,036 5.53 0.0202
2026-03-16 2025-12-31 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 27,053 1,211 4.69 20,882 43.71 0.0376
2026-02-14 2025-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 27,054 1,212 20,882 0.0191
2025-11-14 2025-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 25,842 -3,778 -12.75 14,531 -6.57 0.0284
2025-08-14 2025-06-30 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 29,620 -37,988 -56.19 15,551 -63.73 0.0341
2025-08-08 2025-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 29,620 -37,988 15,551 0.0196
2025-05-14 2025-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 67,608 -27,136 -28.64 42,880 -36.48 0.1058
2025-02-13 2024-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 94,744 -3,260 -3.33 67,505 -34.47 0.1748
2024-11-14 2024-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 98,004 -1,096 -1.11 103,021 -1.09 0.2773
2024-08-12 2024-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 99,100 -5,601 -5.35 104,152 3.35 0.2960
2024-05-14 2024-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 104,701 -910 -0.86 100,774 8.64 0.2941
2024-02-14 2023-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 105,611 1,600 1.54 92,757 8.37 0.3099
2023-11-14 2023-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 104,011 25,319 32.17 85,597 51.38 0.3301
2023-08-14 2023-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 78,692 3,233 4.28 56,543 91,098.39 0.2190
2023-05-16 2023-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 75,459 -27 -0.04 62 -99.89 0.2666
2023-03-06 2022-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 75,486 -5,424 -6.70 54,461 -2.29 0.2737
2022-11-02 2022-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 80,910 -839 -1.03 55,735 15.34 0.2881
2022-08-12 2022-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 81,749 -9,903 -10.81 48,323 -24.51 0.2568
2022-05-13 2022-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 91,652 5,492 6.37 64,011 17.64 0.3087
2022-02-14 2021-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 86,160 -1,174 -1.34 54,411 2.95 0.2539
2021-11-12 2021-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 87,334 -102,416 -53.97 52,850 -50.13 0.2777
2021-08-10 2021-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 189,750 62,498 49.11 105,981 76.03 0.5970
2021-05-11 2021-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 127,252 18,631 17.15 60,206 14.73 0.4074
2021-02-12 2020-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 108,621 4,041 3.86 52,474 -10.36 0.3974
2020-11-13 2020-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 104,580 -27,219 -20.65 58,539 -28.78 0.5484
2020-08-12 2020-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 131,799 -2,710 -2.01 82,196 25.15 0.8601
2020-05-12 2020-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 134,509 -20,682 -13.33 65,680 12.71 0.8616
2020-02-07 2019-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 155,191 -81,823 -34.52 58,272 -11.37 0.7265
2019-11-12 2019-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 237,014 -3,564 -1.48 65,748 -12.69 0.8919
2019-08-09 2019-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 240,578 99,548 70.59 75,301 30.03 1.0499
2019-05-10 2019-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 141,030 -1,491 -1.05 57,910 8.79 0.8254
2019-02-12 2018-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 142,521 -32,249 -18.45 53,232 -24.62 0.9329
2018-11-02 2018-09-30 13F Regeneron Pharmaceuticals Common 75886F107 174,770 -1,761 -1.00 70,615 15.95 1.0719
2018-07-31 2018-06-30 13F Regeneron Pharmaceuticals Common 75886F107 176,531 -1,908 -1.07 60,902 -0.89 0.9917
2018-05-09 2018-03-31 13F Regeneron Pharmaceuticals Common 75886F107 178,439 178,439 61,447 1.0154
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.