MUSTANG BIO, INC. — Director's Dealing 2021

Dec 16, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MUSTANG BIO, INC. (MBIO)
CIK: 0001680048
Period of Report: 2021-12-08

Reporting Person: Achenbach Brian (SVP, Fin. & Corp. Controller)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-12-08	COMMON STOCK	A	22500	—	Acquired	149103	Direct
2021-12-14	COMMON STOCK	S	4374	$1.83	Disposed	144729	Direct

Footnotes

F1: Each restricted stock unit represents the right to receive one share of Common Stock of Mustang Bio, Inc. The restricted stock units will vest at different times over a period of 4 years.

F2: 4,374 shares were sold in connection with the vesting of 13,750 shares on December 4, 2021, these shares were sold by the Company's restricted stock administrator in order to satisfy Mr. Achenbach's tax withholding obligations. Mr. Achenbach had no discretion with respect to such sale, which was transacted automatically in accordance with the Company's corporate policies regarding the vesting of restricted stock.

F3: Represents the weighted average sales price.

F4: Includes restricted share units, which vest over various time periods.