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, 2021

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

Schedule of Summarizes Stock Option Activities

The following table summarizes stock option activities for the three months ended March 31, 2021:


				Weighted Average
				Remaining
		Weighted Average		Contractual Life (in
	Stock Options	Exercise Price		years)
Outstanding at December 31, 2020	1,141,675		5.73	6.31
Outstanding at March 31, 2021	1,141,675		5.73	6.06
Options vested and exercisable at March 31, 2021	820,579	$	5.73	6.06

Schedule of Stock-Based Compensation Expense

The following table summarizes stock-based compensation expense for the three months ended March 31, 2021 and 2020 (in thousands).


	For the three months ended March 31,
	2021		2020
General and administrative	$	324	$	352
Research and development		672		453
Total stock-based compensation expense	$	996	$	805

Schedule of warrant activity

A summary of warrant activities for the three months ended March 31, 2021 is presented below:


				Weighted Average
				Remaining
		Weighted Average		Contractual Life (in
	Warrants	Exercise Price		years)
Outstanding as of December 31, 2020	5,402,670	$	8.21	1.39
Cashless exercised	(138)		—	—
Outstanding as of March 31, 2021	5,402,532	$	8.21	1.14

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, 2021:


		Weighted Average
		Grant Date Fair
	Number of Shares	Value
Nonvested at December 31, 2020	302,114	$	4.93
Nonvested at March 31, 2021	302,114	$	4.93

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, 2021:


		Weighted Average
		Grant Date Fair
	Number of Units	Value
Nonvested at December 31, 2020	1,468,559	$	3.87
Granted	589,250		3.46
Forfeited	(45,750)		4.15
Vested	(168,188)		4.96
Nonvested at March 31, 2021	1,843,871	$	3.63