MBIO · Insider Trading

Mustang Bio, Inc.

Every open-market purchase and sale reported by MBIO officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.

Form 4 Filings
50
most recent
Open-Market Buys
4
code P
Sales
5
code S
Reporting Insiders
5
current holders
MBIO — Recent Form 4 Transactions (latest 2026-04-27)
FiledInsiderRole TypeSharesValue
2026-04-27 Manuel MD Litchman President, CEO and Interim CFO F −19 −$14
2026-01-05 Fortress Biotech, Inc. 10%+ Owner A +278,385 —
2025-12-30 Adam J. Chill Director Sell −4 −$4
2025-12-30 Neil Herskowitz Director Sell −247 −$238
2025-12-30 David Jin Director Buy +247 +$238
2025-10-01 Fortress Biotech, Inc. 10%+ Owner A +59,334 —
2025-04-28 Manuel MD Litchman President, CEO and Interim CFO F −27 −$33
2025-04-02 Fortress Biotech, Inc. 10%+ Owner A +67,806 —
2024-06-28 Fortress Biotech, Inc. 10%+ Owner A +575,191 —
2024-06-04 Manuel MD Litchman President and CEO F −1,396 −$489
2024-06-04 Manuel MD Litchman President and CEO F −2,820 −$21.78K
2024-01-03 Fortress Biotech, Inc. 10%+ Owner A +419,092 —
2023-07-07 Adam J. Chill Director A +7,246 —
2023-07-07 Michael J Zelefsky Director A +7,246 —
2023-07-07 Manuel MD Litchman President and CEO A +5,000 —
2023-07-07 Neil Herskowitz Director A +7,246 —
2023-07-07 Lindsay A Md Rosenwald Director A +7,246 —
2023-07-07 Michael S Weiss Director A +7,246 —
2023-04-03 Adam J. Chill Director A +71,664 —
2023-04-03 Manuel MD Litchman Director MIXED +71,000 +$6.28K
2023-04-03 Michael S Weiss Director A +71,664 —
2023-04-03 Lindsay A Md Rosenwald Director MIXED +80,758 +$5.61K
2023-04-03 Neil Herskowitz Director A +71,664 —
2023-04-03 Michael J Zelefsky Director A +71,664 —
2023-01-06 Fortress Biotech, Inc. 10%+ Owner A +2,807,008 —
2021-12-16 Brian Achenbach SVP, Fin. & Corp. Controller MIXED +18,126 −$8.00K
2021-11-08 Manuel MD Litchman President and CEO Buy +65,000 +$145.60K
2021-10-21 Brian Achenbach SVP, Fin. & Corp. Controller Sell −4,450 −$10.15K
2021-09-24 Manuel MD Litchman President and CEO A +2,746 +$7.08K
2021-09-24 Lindsay A Md Rosenwald Director A +1,170 +$3.02K
2021-08-05 Manuel MD Litchman President and CEO Buy +86,206 +$250.86K
2021-07-08 Manuel MD Litchman President and CEO A +61,000 —
2021-07-08 Lindsay A Md Rosenwald Director A +13,774 —
2021-07-08 Neil Herskowitz Director A +13,774 —
2021-07-08 Adam J. Chill Director A +13,774 —
2021-07-08 Michael S Weiss Director A +13,774 —
2021-07-08 Michael J Zelefsky Director A +13,774 —
2021-04-29 Manuel MD Litchman President and CEO Sell −12,373 −$37.61K
2021-04-16 Brian Achenbach SVP, Fin. & Corp. Controller Sell −20,721 −$66.28K
2021-03-15 Brian Achenbach SVP, Fin. & Corp. Controller A +22,500 —
2021-03-15 Lindsay A Md Rosenwald Director A +1,043 +$2.95K
2021-03-15 Manuel MD Litchman President and CEO MIXED +170,562 +$530.70K
2020-12-22 Lindsay A Md Rosenwald Director MIXED +101,182 +$268.93K
2020-12-22 Lindsay A Md Rosenwald Director A +17,442 +$43.26K
2020-12-22 Manuel MD Litchman President and CEO MIXED +166,000 +$303.40K
2020-12-15 Lindsay A Md Rosenwald Director Buy +100,000 +$266.00K
2020-08-19 Lindsay A Md Rosenwald Director A +16,611 —
2020-08-19 Adam J. Chill Director A +16,611 —
2020-08-19 Michael J Zelefsky Director A +16,611 —
2020-08-19 Neil Herskowitz Director A +16,611 —
MBIO — Current Insider Holders
InsiderRole Shares HeldValue
Fortress Biotech, Inc. 10%+ Owner 536,577 $193.22K
Manuel MD Litchman President, CEO and Interim CFO 1,615 $582
Adam J. Chill Director 375 $135
David Jin Director 286 $103
Neil Herskowitz Director 145 $52
MBIO Insider Trading FAQ
Who are the insiders at MBIO?
5 officers, directors and 10%+ beneficial owners currently report holdings in MBIO via SEC Form 4.
Are MBIO insiders buying or selling?
Across the 50 most recent Form 4 filings for MBIO, 4 were open-market purchases (code P) and 5 were sales (code S). Sales frequently reflect scheduled 10b5-1 plans or tax withholding rather than a view on the stock.
How current is MBIO insider data?
Form 4 must be filed within two business days of the transaction, so this is close to real time. The most recent MBIO filing is dated 2026-04-27.
How to read Form 4 activity

Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.

Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.

Full filing history and per-insider positions are on the MBIO quote page; the site-wide leaderboard is on the insider transactions hub.

Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.