Adam J. Chill - 30 Dec 2025 Form 4 Insider Report for MUSTANG BIO, INC. (MBIO)

Reporting relationship: Director
Issuer ticker: MBIO
Reported as of: 30 Dec 2025
Net transaction value: -$3.82
SEC form: 4
Accepted by SEC: 30 Dec 2025, 16:16:14 UTC
Prior SEC filing: 07 Jul 2023
Source filing: View source filing
Reporting owner signature: /s/ Adam Chill

Key filing fact

Adam J. Chill filed Form 4 for MUSTANG BIO, INC. (MBIO) on 30 Dec 2025.

Key facts

This page summarizes Adam J. Chill's Form 4 filing for MUSTANG BIO, INC. (MBIO).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 30 Dec 2025, 16:16.

Change

Previous filing in this sequence was filed on 07 Jul 2023.
Current net transaction value: -$3.82.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001626451 Primary reporting owner

Chill Adam J.

Relationship: Director
Address: 95 SAWYER ROAD, SUITE 110, WALTHAM
Signature: /s/ Adam Chill
Signature date: 30 Dec 2025

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

MBIO transaction

COMMON STOCK, PAR VALUE $0.0001

Sale

Transaction value: $3.82
Shares: -4
Change %: -1.1%
Price: $0.9548
Shares after: 375
Date: 30 Dec 2025
Ownership: Direct
Footnotes: F1

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 1 footnote

Footnote F1

Effective January 15, 2025, the Issuer effected a one-for-fifty reverse stock split of its common stock (the "Reverse Stock Split"). The amount of common stock reflected on this Form 4 has been adjusted to reflect the Reverse Stock Split.