Leonard Schleifer
Leonard Schleifer is number 223 in the 311 Private Wealth Index, with disclosed holdings in listed companies worth about $552m, mainly in Regeneron Pharmaceuticals, Inc. That is about 2,867 times the wealth of a typical US household. Leonard Schleifer is the board co-chair, president and chief executive officer of Regeneron Pharmaceuticals, Inc.
Part of the 311 Private Wealth Index (311institute.com). Last updated .
Disclosed holdings
| Company | Value | Latest filing | Shares |
|---|---|---|---|
| Regeneron Pharmaceuticals, Inc. | $552m | 5 January 2026 | 710,562 at $777.44 |
How this figure is calculated
Shares reported in SEC insider filings (Forms 3, 4 and 5), at the latest holding each filing reports, valued at the latest price disclosed in those filings, or at the latest closing price where no recent trade price was filed. Holdings that the filings say belong to investment funds managed by the person are left out, and shares reported jointly by several family members are counted once. Private companies, cash, property and holdings listed outside the United States are not included, so this is a minimum, not total wealth. The household comparison uses $192,700, the median US household wealth in the Federal Reserve Survey of Consumer Finances (2022, the latest published).
Related
- Regeneron Pharmaceuticals, Inc. in the 311 Titans Index
- Innovation profile of Tarrytown
- United States: economy and key statistics
- The 311 Private Wealth Index
- The 311 Titans Index
- All 311 Indexes
Others in the index with Regeneron Pharmaceuticals, Inc. as their main holding
- George Yancopoulos (#179)
Questions and answers
What is Leonard Schleifer's net worth?
Leonard Schleifer has disclosed holdings in listed companies worth about $552m, according to the 311 Private Wealth Index. This is a minimum: private companies, cash and property are not included.
How much are Leonard Schleifer's disclosed holdings worth?
About $552m in listed companies, ranking Leonard Schleifer number 223 in the 311 Private Wealth Index.
Where does Leonard Schleifer's wealth come from?
Mainly from holdings in Regeneron Pharmaceuticals, Inc. Leonard Schleifer is the board co-chair, president and chief executive officer of Regeneron Pharmaceuticals, Inc.
Source: SEC insider filings.
© 311 Institute 2026. Facts from official filings and the sources linked on this page. The selection, classification and links are the proprietary work of the 311 Institute, protected by copyright and database rights.