Profile

Identity, professional record and current appointments.

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
33 current organizations shown on this profile
Board positions
33 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

Mr. Weiss has served as Chairman since May 2015 and Executive Chairman since January 2017. He is also Executive Vice Chairman, Strategic Development of Fortress Biotech, Inc. since February 2014, and Chairman, President and CEO of TG Therapeutics, Inc. since December 2011. He earned his J.D. from Columbia Law School and began his career as a lawyer at Cravath, Swaine Moore LLP.

Sources are shown with the information they support.

Current roles

Appointments & responsibilities

Board appointments

Governance

Board appointments, committee responsibilities and disclosed relationships.

Board and advisory record

Board service

Sources are shown with each role, education record, or credential.

Director

MUSTANG BIO, INC.

2015-01-01 · current

Confirmed by public sourceView source

Director

Fortress Biotech, Inc.

2013-01-01 · current

Confirmed by public sourceView source

Director

TG THERAPEUTICS, INC.

2011-01-01 · current

Confirmed by public sourceView source

Connections

Explore the roles, education and affiliations published in this record.

Fortress Biotech, Inc.

Open Fortress Biotech, Inc. profile →

Director at Fortress Biotech, Inc.

2013-01-01 → End not stated

current · source reported

Observed: 2026-09-22

Fortress Biotech, …Fortress Biotech, Inc.MUSTANG BIO, INC.MUSTANG BIO, INC.TG THERAPEUTICS, I…TG THERAPEUTICS, INC.Michael S. Weiss

Dashed lines mark past roles. Select a connection to see its dates and sources.

Relationship map

Connected through the public record

Direct relationships from verified facts and published résumé records. Private connections are excluded.

Direct public links only

Only published affiliations are shown here. Private relationships require authorized access.

Experience

Career history, education, credentials and public contributions.

Published record

Featured coverage

Selected publications and public sources used to establish this profile. Inclusion records provenance; it is not an endorsement.

Source 1 · Sec FilingFBIO DEF 14A executive officersSupports Executive company, Executive title.Open sourceSource 2 · Sec FilingMBIO 10-K executive officersSupports AI and ML experience, Cybersecurity experience, Executive company, Executive title, Other Company Role, Technology background.Open sourceSource 3 · Sec FilingTGTX 10-K executive officersSupports Executive company, Executive title.Open sourceSource 4 · Sec FilingMBIO DEF 14A director slateSupports AI and ML experience, Board role, Committee assignments, Executive company, Executive title, Cybersecurity experience, Technology background.Open sourceSource 5 · Sec FilingTGTX DEF 14A director slateSupports Board role, Committee assignments.Open sourceSource 6 · Sec FilingFBIO DEF 14A director slateSupports Board role, Committee assignments.Open source

Basis

Identifiers, sources, dates and record limitations.

Identifiers

Alpha ID
alpha:person:michael-s-weiss
Record version
public-0

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 · CorroboratedAI and ML experience: not identified in the cited filingSupported by 2 public records2 sources
Verification
Corroborated
Confidence
72%
Last reviewed
May 16, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

Board membership · Source reportedServes on the board of Fortress Biotech, Inc.1 source
Verification
Source reported
Confidence
Not stated
Last reviewed
Not stated
Board membership · Source reportedServes on the board of MUSTANG BIO, INC.1 source
Verification
Source reported
Confidence
Not stated
Last reviewed
Not stated
Board membership · Source reportedServes on the board of TG THERAPEUTICS, INC.1 source
Verification
Source reported
Confidence
Not stated
Last reviewed
Not stated
Board role · CorroboratedBoard role: ChairSupported by 2 public records2 sources
Verification
Corroborated
Confidence
92%
Last reviewed
May 16, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

Board role · Source reportedBoard role: Director1 source
Verification
Source reported
Confidence
92%
Last reviewed
May 15, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 15, 2026

Committee assignments · CorroboratedNo committee assignment disclosed in the cited filingSupported by 3 public records3 sources
Verification
Corroborated
Confidence
88%
Last reviewed
May 16, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 15, 2026

Cybersecurity experience · CorroboratedCybersecurity experience: not identified in the cited filingSupported by 2 public records2 sources
Verification
Corroborated
Confidence
72%
Last reviewed
May 16, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

Executive company · CorroboratedExecutive at Fortress Biotech, Inc.Supported by 2 public records2 sources
Verification
Corroborated
Confidence
94%
Last reviewed
Jul 28, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed Jul 28, 2026

Executive company · Source reportedExecutive at MUSTANG BIO, INC.1 source
Verification
Source reported
Confidence
94%
Last reviewed
May 16, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

Executive company · CorroboratedExecutive at TG Therapeutics, Inc.Supported by 2 public records2 sources
Verification
Corroborated
Confidence
94%
Last reviewed
May 16, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

Executive title · Source reportedExecutive title: Chairman, Chief Executive Officer and President1 source
Verification
Source reported
Confidence
94%
Last reviewed
May 3, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

Executive title · Source reportedExecutive title: Chairman of the Board of Directors and Executive Chairman1 source
Verification
Source reported
Confidence
94%
Last reviewed
May 16, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

Executive title · Source reportedExecutive title: Chairman, President and Chief Executive Officer1 source
Verification
Source reported
Confidence
85%
Last reviewed
May 16, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

Executive title · CorroboratedExecutive title: Executive Vice Chairman, Strategic DevelopmentSupported by 2 public records2 sources
Verification
Corroborated
Confidence
94%
Last reviewed
Jul 28, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed Jul 28, 2026

Other Company Role · Source reportedMichael S. Weiss is also linked to TG Therapeutics, Inc. as Chairman, President and Chief Executive Officer.1 source
Verification
Source reported
Confidence
70%
Last reviewed
May 16, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

Technology background · CorroboratedTechnology background: not identified in the cited filingSupported by 2 public records2 sources
Verification
Corroborated
Confidence
72%
Last reviewed
May 16, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

View all sources13 records
  1. SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

    Supports: Executive company · Executive title

  2. SEC EDGAR

    Sec Filing · Tier 3 · Reviewed Jul 28, 2026

    Supports: Executive company · Executive title

  3. SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

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

  4. SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

    Supports: Executive company · Executive title

  5. SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

    Supports: AI and ML experience · Board role · Committee assignments · Executive company · Executive title · Cybersecurity experience · Technology background

  6. https://www.sec.gov/Archives/edgar/data/1680048/000110465925118122/tmb-20251222xdef14a.htm

    Sec Proxy · Tier not stated · Reviewed Apr 25, 2026

    Supports: Director at MUSTANG BIO, INC. (NASDAQ: MBIO)

  7. SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

    Supports: Board role · Committee assignments

  8. https://www.sec.gov/Archives/edgar/data/1001316/000143774925013860/tgtx20250423_def14a.htm

    Sec Proxy · Tier not stated · Reviewed May 3, 2026

    Supports: Director at TG THERAPEUTICS, INC. (NASDAQ: TGTX)

  9. SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 15, 2026

    Supports: Board role · Committee assignments

  10. https://www.sec.gov/Archives/edgar/data/1429260/000155837025005678/fbio-20250617xdef14a.htm

    Sec Proxy · Tier not stated · Reviewed Apr 28, 2026

    Supports: Director at Fortress Biotech, Inc. (NASDAQ: FBIOP)

  11. https://www.sec.gov/Archives/edgar/data/1680048/000110465925118122/tmb-20251222xdef14a.htm

    Public Source · Tier not stated · Reviewed Not stated

    Supports: Board membership

  12. https://www.sec.gov/Archives/edgar/data/1429260/000155837025005678/fbio-20250617xdef14a.htm

    Public Source · Tier not stated · Reviewed Not stated

    Supports: Board membership

  13. https://www.sec.gov/Archives/edgar/data/1001316/000143774925013860/tgtx20250423_def14a.htm

    Public Source · Tier not stated · Reviewed Not stated

    Supports: Board membership