Michael S. Weiss
CEO and President at TG Therapeutics Inc.
Sits on 3 boards. Last updated September 28, 2026
Time on boards
- Boards served
- 3
- Current seats
- 3
- Board service
- 18 years
- Director since
- 2016
18 years of board service in total across 3 boards, counting each seat separately. Longest: Mustang Bio Inc., 10 years.
Chief executive roles
Shareholder support
Support is votes for as a share of votes for and against (or withheld). Below 80% is a clear protest.
-
Mustang Bio Inc. December 26, 202498.1%
-
Fortress Biotech Inc. May 23, 202495.7%
Insider trades
All notable trades →From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.
| Date | Company | Transaction | Shares | Price | Value |
|---|---|---|---|---|---|
| Mar 18, 2026 | Fortress Biotech Inc. | Grant or award | +475,424 | — | — |
| Jan 8, 2026 | TG Therapeutics Inc. | Grant or award | +622,000 | — | — |
| Nov 5, 2025 | TG Therapeutics Inc. | Gift | −3,865,126 | — | — |
| Nov 5, 2025 | TG Therapeutics Inc. | Gift | −803,717 | — | — |
| Jan 29, 2025 | TG Therapeutics Inc. | Grant or award | +750,000 | — | — |
| Jan 1, 2025 | Fortress Biotech Inc. | Grant or award | +454,153 | — | — |
| Jan 6, 2024 | TG Therapeutics Inc. | Grant or award | +1,001,908 | — | — |
| Jan 1, 2024 | Fortress Biotech Inc. | Grant or award | +216,465 | — | — |
| Nov 14, 2023 | Fortress Biotech Inc. | Open-market purchase | +147,058 | $1.70 | $249,999 |
| Aug 11, 2023 | TG Therapeutics Inc. | Open-market purchase | +100,000 | $10.13 | $1,013,000 |
| Jul 5, 2023 | Mustang Bio Inc. | Grant or award | +7,246 | — | — |
| Mar 12, 2023 | TG Therapeutics Inc. | Grant or award | +985,000 | — | — |
| Feb 10, 2023 | Fortress Biotech Inc. | Open-market purchase | +1,197,604 | $0.84 | $1,005,987 |
| Jan 1, 2023 | Fortress Biotech Inc. | Grant or award | +1,219,294 | — | — |
| Jul 29, 2022 | Mustang Bio Inc. | Grant or award | +71,664 | — | — |
Questions about Michael S. Weiss
What boards is Michael S. Weiss on?
Michael S. Weiss sits on the boards of Fortress Biotech Inc., Mustang Bio Inc. and TG Therapeutics Inc.
What company is Michael S. Weiss the CEO of?
Michael S. Weiss is CEO and President of TG Therapeutics Inc.
How long has Michael S. Weiss served on boards?
Our records show at least 18 years of board service across 3 boards, the earliest from 2016.
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