Regeneron Pharmaceuticals, Inc.
MX ˙ BMV ˙ US75886F1075
SecurityMX:REGN / Regeneron Pharmaceuticals, Inc.
InstitutionKinneret Advisory, LLC
Latest Disclosed Ownership1,116 shares
Latest Disclosed Value $ 862,266
Kinneret Advisory, LLC reports 4.29% decrease in ownership of REGN / Regeneron Pharmaceuticals, Inc.

On May 14, 2026 - Kinneret Advisory, LLC filed a 13F-HR form disclosing ownership of 1,116 shares of Regeneron Pharmaceuticals, Inc. (MX:REGN) valued at $862,266 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 1,166 shares of Regeneron Pharmaceuticals, Inc.. This represents a change in shares of -4.29% 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 1,116 -50 -4.29 862 -4.22 0.0817
2026-02-12 2025-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,166 -32 -2.67 900 33.73 0.0762
2025-11-05 2025-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,198 -5 -0.42 674 6.66 0.0573
2025-07-25 2025-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,203 -3 -0.25 632 -17.41 0.0575
2025-07-21 2025-03-31 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 1,206 -4 -0.33 765 -11.27 0.0771
2025-04-29 2025-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 812 -398 515 0.0771
2025-02-03 2024-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,210 -57 -4.50 862 -35.31 0.0814
2024-11-04 2024-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,267 -16 -1.25 1,332 -1.26 0.1222
2024-07-26 2024-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,283 601 88.12 1,348 105.49 0.1293
2024-04-25 2024-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 682 -2 -0.29 656 9.33 0.0656
2024-02-14 2023-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 684 -4 -0.58 601 6.01 0.0665
2023-10-12 2023-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 688 0 0.00 566 14.57 0.0699
2023-08-02 2023-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 688 0 0.00 494 -12.57 0.0586
2023-04-27 2023-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 688 -37 -5.10 565 8.03 0.0730
2023-02-14 2022-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 725 -239 -24.79 523 -21.23 0.0691
2022-11-02 2022-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 964 0 0.00 664 16.49 0.0921
2022-08-04 2022-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 964 21 2.23 570 -13.51 0.0739
2022-05-13 2022-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 943 21 2.28 659 13.23 0.0723
2022-02-08 2021-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 922 0 0.00 582 4.30 0.0602
2021-11-09 2021-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 922 0 0.00 558 8.35 0.0654
2021-08-16 2021-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 922 0 0.00 515 18.12 0.0609
2021-05-13 2021-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 922 0 0.00 436 -2.02 0.0560
2021-02-11 2020-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 922 0 0.00 445 -13.76 0.0604
2020-11-13 2020-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 922 -30 -3.15 516 -13.13 0.0782
2020-08-12 2020-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 952 0 0.00 594 27.74 0.0955
2020-05-14 2020-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 952 107 12.66 465 46.69 0.0906
2020-02-10 2019-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 845 0 0.00 317 35.47 0.0576
2019-11-13 2019-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 845 0 0.00 234 -11.36 0.0466
2019-08-13 2019-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 845 0 0.00 264 -23.92 0.0535
2019-05-15 2019-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 845 37 4.58 347 14.90 0.0730
2019-02-13 2018-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 808 808 302 0.0894
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.