Mustang Bio, Inc. (MBIO) Insider Ownership

Historic Insider Ownership Trends

As of March 23, 2026, Mustang Bio's top three insider holders are Brian Achenbach (Svp, Fin. Corp. Controller, 144.73K shares), Lindsay A Md Rosenwald (Director, 60.52K shares), Michael S Weiss (Director, 49.64K shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares (Direct) Shares (Indirect) Report Date
Biotech, Inc. Fortress 536,577 0 05 Jan, 2026
Brian Achenbach Svp, Fin. Corp. Controller 144,729 0 16 Dec, 2021
Lindsay A Md Rosenwald 60,525 0 07 Jul, 2023
Michael S Weiss 0 49,637 07 Jul, 2023
Michael J Zelefsky 18,970 0 07 Jul, 2023
Manuel Md Litchman President, Ceo And Interim Cfo 1,634 0 28 Apr, 2025
Adam J. Chill 375 0 30 Dec, 2025
David Jin 286 0 30 Dec, 2025

* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
02 Jan, 2026 Biotech, Inc. Fortress COMMON STOCK, PAR VALUE $0.0001 A 278,385 $0.00 536,577 D A
30 Dec, 2025 Adam J. Chill COMMON STOCK, PAR VALUE $0.0001 D 4 $0.95 375 D S
30 Dec, 2025 David Jin COMMON STOCK, PAR VALUE $0.0001 A 247 $0.96 286 D P
29 Sep, 2025 Biotech, Inc. Fortress COMMON STOCK, PAR VALUE $0.0001 A 59,334 $0.00 258,192 D A
24 Apr, 2025 Manuel Md Litchman COMMON STOCK D 27 $1.24 1,634 D F
31 Mar, 2025 Biotech, Inc. Fortress COMMON STOCK, PAR VALUE $0.0001 A 67,806 $0.00 198,858 D A
27 Jun, 2024 Biotech, Inc. Fortress COMMON STOCK, PAR VALUE $0.0001 A 575,191 $0.00 2,502,991 D A
31 May, 2024 Manuel Md Litchman Common Stock D 1,396 $0.35 83,024 D F
02 Jan, 2024 Biotech, Inc. Fortress COMMON STOCK, PAR VALUE $0.0001 A 419,092 $0.00 1,927,800 D A
05 Jul, 2023 Michael J Zelefsky COMMON STOCK, PAR VALUE $0.0001 A 7,246 $0.00 18,970 D A
05 Jul, 2023 Lindsay A Md Rosenwald COMMON STOCK, PAR VALUE $0.0001 A 7,246 $0.00 60,525 D A
05 Jul, 2023 Adam J. Chill COMMON STOCK, PAR VALUE $0.0001 A 7,246 $0.00 19,170 D A
24 Apr, 2023 Manuel Md Litchman COMMON STOCK, PAR VALUE $0.0001 A 5,000 $0.00 111,079 D A
05 Jul, 2023 Michael S Weiss COMMON STOCK, PAR VALUE $0.0001 A 7,246 $0.00 49,637 I A
06 Jan, 2023 Biotech, Inc. Fortress COMMON STOCK, PAR VALUE $0.0001 A 2,807,008 $0.00 22,630,620 D A
08 Dec, 2021 Brian Achenbach COMMON STOCK A 22,500 $0.00 149,103 D A
14 Dec, 2021 Brian Achenbach COMMON STOCK D 4,374 $1.83 144,729 D S
27 Oct, 2021 Manuel Md Litchman COMMON STOCK A 65,000 $2.24 1,027,987 D P
12 Oct, 2021 Brian Achenbach COMMON STOCK D 4,450 $2.28 126,603 D S
31 Aug, 2021 Lindsay A Md Rosenwald COMMON STOCK A 1,170 $2.58 218,423 D A