Leonard S. Schleifer owns 2.34% of Regeneron Pharmaceuticals
2,413,546 shares as of the December 31, 2025 filing, worth $1.9B at the latest close.
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Free.
The stake
2.34%
worth $1.9B at the latest close
Stake rank
#62
by dollar value of the stake
Last sale
859 days ago
Jun 12, 2024
Last buy
None
no purchases since 2020
Leonard S. Schleifer owns 2.34% of REGENERON PHARMACEUTICALS, INC.: 2,413,546 of 102,954,988 shares, worth about $1.9B at the 2026-10-16 close. The stake has moved from 1.72% in 2016 to 2.34% on 2026-06-30, across 9 sales and 0 purchases that moved it since 2016. The last trade that moved it was a planned sale of $25.6M on 2024-06-12.
How the stake is held
each class as its filings last stated it
SHARES
OF THE STAKE
HELD DIRECTLY
1,710,790
70.9%
HELD INDIRECTLY · by Trust for Son
14,775
0.6%
HELD DIRECTLY
214,523
8.9%
HELD INDIRECTLY · 4 VEHICLES
473,458
19.6%
By 2025 GRAT
300,000
12.4%
By 2024 GRAT
127,484
5.3%
By Trust
39,985
1.7%
By 401(k) Plan
5,989
0.2%
THE STAKE
2,413,546
2.34%