Leonard Schleifer
Profile Summary
Leonard S. Schleifer (born 1952) is a U.S.-based healthcare executive in New York with an estimated net worth of ~$2.8B. SEC records link him to Regeneron Pharmaceuticals, Inc. (REGN) through insider ownership filings. RTB SEC EDGAR
Business & SEC Activity
Schleifer appears in SEC EDGAR as an insider filer with 72 insider filings, including multiple Form 4 filings and Form 144 notices. Form 4 reports changes in an insider’s ownership (such as buys, sells, or option exercises), while Form 144 is a notice of a planned sale of restricted or control securities. Recent filings include Form 4s dated 2026-01-05 and 2025-12-11, and Form 144 filings dated 2024-06-12 and 2024-06-06. SEC EDGAR
Philanthropy
ProPublica-reported 990 filings show two foundations associated with the Schleifer name: the Schleifer Family Foundation (NY, tax year 2023) and the Jack P Schleifer Foundation (NY, tax year 2020). Across both, total foundation assets were $15,799,891 and total grants paid were reported as $0; the Schleifer Family Foundation reported $13,163,102 in assets with $0 grants paid and $3,032,749 in total expenses in 2023. ProPublica 990
Political Activity
FEC data shows 100 contributions totaling $419,925.93 from 2010-06-02 to 2025-12-31. The party breakdown reported is $166,589.48 to DEM, $436.85 to DFL, and $252,899.60 to PAC/Other; top recipients include SMP ($120,000), Hillary Victory Fund ($52,700), DSCC ($50,000), Senate Majority PAC ($50,000), and DNC Services Corp./Democratic National Committee ($33,400). FEC
U.S. Presence
Philanthropy
Political Contributions
By Party
Top Recipients
SEC Filings
Associated Companies
Entities appearing alongside this person in SEC full-text search — an association, not necessarily ownership or control. Follow each link to the primary SEC record to judge for yourself.
Recent Insider Filings
Score Breakdown
The PBS is a weighted average of 2 components. The formula is open and versioned — the weight percentages below show how much each component contributes to the final score.
Evidenced charitable giving — built on what they actually give each year, not parked assets. Dominated by generosity (annual giving relative to net worth — the share of your fortune you give), plus the absolute scale of that giving, plus a small nudge for signing the Giving Pledge (a commitment, not a realized action).
Data: ProPublica 990 charitable disbursements, net worth, The Giving Pledge registry
How much sourced, public accountability data exists — net worth, political contributions, SEC filings, foundation 990s, news coverage, and a verified profile. More public disclosure scores higher.
Data: FEC, SEC EDGAR, ProPublica 990s, GDELT / NewsAPI, Wikidata
Formula (v2): PBS = 65% x Philanthropy + 35% x Transparency
Scored on 6/23/2026 on a 0–100 scale. The score uses only the signals we have populated data for. Goal Impact, Controversy, and Community Approval are deferred until that data exists — Phase 1 goal adoption, controversy detection, and community votes respectively.
All data is sourced from public records. Each section links to its original source.