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Profile

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Overview

Professional record at a glance

A concise summary of information supported by the cited public sources. Missing information is treated as unknown, not as a negative finding.

Current roles
11 current organization shown on this profile
Board positions
11 supported by public sources, 0 supplied by the profile owner
Committee roles
Not establishedNo committee role is currently confirmed by the cited sources
Qualifications
Not establishedNo qualification is currently confirmed by the cited sources

Professional narrative

About

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Current roles

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Board appointments

Governance

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Committee appointments across companies · Temporarily unavailable

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Board and advisory record

Board service

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Director

Regeneron Pharmaceuticals

1988-01-01 · current

Confirmed by public sourceView source

Connections

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Regeneron Pharmaceuticals

Open Regeneron Pharmaceuticals profile →

Director at Regeneron Pharmaceuticals

1988-01-01 → End not stated

current · source reported

Observed: 2026-09-25

Regeneron Pharmace…Regeneron PharmaceuticalsLeonard S. Schleifer

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Relationship map

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Experience

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Published record

Featured coverage

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Source 1 · Sec ProxyPublic profile sourceSupports Director at Regeneron Pharmaceuticals (NASDAQ: REGN).Open sourceSource 2 · Sec FilingREGN 10-K executive officersSupports AI and ML experience, Cybersecurity experience, Executive company, Executive title, Technology background.Open source

Basis

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Identifiers

Alpha ID
alpha:person:leonard-s-schleifer
Record version
public-0

Published evidence records

4 evidence records, matching Agent View. Records may refer to different locations or observations in the same document. This count is not a count of independent corroborating sources.

  1. Open source

    sec proxy · Source published: Apr 24, 2026 · Retrieved: Apr 24, 2026

    Supports 1 claim
    • Professional Role: Director at Regeneron Pharmaceuticals · Claim reviewed: Mar 27, 2026

  2. REGN 10-K executive officers

    sec filing · Source published: Feb 4, 2026 · Retrieved: Jul 11, 2026

    Supports 5 claims
    • AI and ML experience: AI and ML experience: not identified in the cited filing · Claim reviewed: Jul 11, 2026
    • Cybersecurity experience: Cybersecurity experience: not identified in the cited filing · Claim reviewed: Jul 11, 2026
    • Executive company: Executive at Regeneron Pharmaceuticals, Inc. · Claim reviewed: Jul 11, 2026
    • Executive title: Executive title: Chief Executive Officer · Claim reviewed: Jul 11, 2026
    • Technology background: Technology background: not identified in the cited filing · Claim reviewed: Jul 11, 2026

  3. REGN executive roster source

    sec filing · Source published: Date unavailable · Retrieved: May 3, 2026

    Supports 5 claims
    • AI expertise: AI expertise: not identified in the cited filing · Claim reviewed: May 3, 2026
    • AI governance relevance: AI governance relevance reported from role and filings · Claim reviewed: May 3, 2026
    • Executive company: Executive at Regeneron Pharmaceuticals, Inc. · Claim reviewed: Jul 11, 2026
    • Executive function: Enterprise Leadership (CEO) · Claim reviewed: May 3, 2026
    • Executive title: Executive title: Chief Executive Officer · Claim reviewed: Jul 11, 2026

  4. Open source

    public source · Source published: Date unavailable · Retrieved: Date unavailable

    Supports 1 claim
    • Board membership: Serves on the board of Regeneron Pharmaceuticals · Claim reviewed: Mar 27, 2026

Sources

Sources and published information

Each item links to the public source used to support it. When sources disagree, the item is clearly marked for review.

AI and ML experience · Source reportedAI and ML experience: not identified in the cited filing1 source
Verification
Source reported
Confidence
72%
Last reviewed
Jul 11, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed Jul 11, 2026

AI expertise · Source reportedAI expertise: not identified in the cited filing1 source
Verification
Source reported
Confidence
94%
Last reviewed
May 3, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

AI governance relevance · Source reportedAI governance relevance reported from role and filings1 source
Verification
Source reported
Confidence
94%
Last reviewed
May 3, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

Board membership · Source reportedServes on the board of Regeneron Pharmaceuticals1 source
Verification
Source reported
Confidence
Not stated
Last reviewed
Not stated
Cybersecurity experience · Source reportedCybersecurity experience: not identified in the cited filing1 source
Verification
Source reported
Confidence
72%
Last reviewed
Jul 11, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed Jul 11, 2026

Executive company · CorroboratedExecutive at Regeneron Pharmaceuticals, Inc.Supported by 2 public records2 sources
Verification
Corroborated
Confidence
94%
Last reviewed
Jul 11, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed Jul 11, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

Executive function · Source reportedEnterprise Leadership (CEO)1 source
Verification
Source reported
Confidence
94%
Last reviewed
May 3, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

Executive title · CorroboratedExecutive title: Chief Executive OfficerSupported by 2 public records2 sources
Verification
Corroborated
Confidence
94%
Last reviewed
Jul 11, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed Jul 11, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

Technology background · Source reportedTechnology background: not identified in the cited filing1 source
Verification
Source reported
Confidence
72%
Last reviewed
Jul 11, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed Jul 11, 2026

View all sources4 records
  1. https://www.sec.gov/Archives/edgar/data/872589/000130817926000340/regn-20260424.htm

    Sec Proxy · Tier not stated · Reviewed Apr 24, 2026

    Supports: Director at Regeneron Pharmaceuticals (NASDAQ: REGN)

  2. SEC EDGAR

    Sec Filing · Tier 3 · Reviewed Jul 11, 2026

    Supports: AI and ML experience · Cybersecurity experience · Executive company · Executive title · Technology background

  3. SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

    Supports: AI expertise · AI governance relevance · Executive company · Executive function · Executive title

  4. https://www.sec.gov/Archives/edgar/data/872589/000130817926000340/regn-20260424.htm

    Public Source · Tier not stated · Reviewed Not stated

    Supports: Board membership