Mustang Bio, Inc. Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2022

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

The following table summarizes stock option activities for the three months ended March 31, 2022:


				Weighted Average
				Remaining
		Weighted Average		Contractual Life (in
	Stock Options	Exercise Price		years)
Outstanding at December 31, 2021	1,141,675	$	5.73	5.31
Outstanding at March 31, 2022	1,141,675		5.73	5.06
Options vested and exercisable at March 31, 2022	713,547	$	5.73	5.06

Schedule of Stock-Based Compensation Expense

The following table summarizes stock-based compensation expense for the three months ended March 31, 2022 and 2021 (in thousands):


	For the three months ended March 31,
	2022		2021
General and administrative	$	147	$	324
Research and development		517		672
Total stock-based compensation expense	$	664	$	996

Summary of Warrant Activities

A summary of warrant activities for the three months ended March 31, 2022, is presented below:


				Weighted Average
				Remaining
		Weighted Average		Contractual Life (in
	Warrants	Exercise Price		years)
Outstanding as of December 31, 2021	3,308,654	$	8.02	0.73
Expired	(3,000,270)		8.50	—
Granted	748,036		0.80	9.93
Outstanding as of March 31, 2022	1,056,420	$	1.54	9.01

Restricted Stock Awards [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedules of Restricted Stock and Restricted Stock Unit Activity

The following table summarizes restricted stock award activities for the three months ended March 31, 2022:


		Weighted Average
		Grant Date Fair
	Number of Shares	Value
Nonvested at December 31, 2021	280,983	$	4.05
Nonvested at March 31, 2022	280,983	$	4.05

Restricted Stock Units [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedules of Restricted Stock and Restricted Stock Unit Activity

Certain employees and consultants have been awarded restricted stock units with time-based vesting. The following table summarizes restricted stock units’ activities for the three months ended March 31, 2022:


		Weighted Average
		Grant Date Fair
	Number of Units	Value
Nonvested at December 31, 2021	2,335,557	$	3.27
Granted	—		—
Forfeited	(146,686)		—
Vested	(270,500)		3.51
Nonvested at March 31, 2022	1,918,371	$	3.00