XOMA Corporation Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation

Stock-based Compensation

9 Months Ended

Sep. 30, 2021

11. Stock-based Compensation

The Company may grant qualified and non-qualified stock options, common stock and other stock-based awards under various plans to directors, officers, employees and other individuals. Stock options are granted at exercise prices of not less than the fair market value of the Company’s common stock on the date of grant. Additionally, the Company has an Employee Stock Purchase Plan (“ESPP”) that allows employees to purchase Company shares at a purchase price equal to 85% of the lower of the fair market value of the Company’s common stock on the first trading day of the offering period or on the last day of the offering period.

Stock Options

Stock options generally vest monthly over three years for employees and one year for directors. Stock options held by employees who qualify for retirement age (defined as employees that are a minimum of 55 years of age and the sum of their age plus years of full-time employment with the Company exceeds 70 years) vest on the earlier of scheduled vest date or the date of retirement.

The fair value of the stock options granted during the three and nine months ended September 30, 2021 and 2020, was estimated based on the following weighted average assumptions:


	Three Months Ended September 30,			Nine Months Ended September 30,
	2021		2020 ⁽¹⁾	2021		2020
Dividend yield	0	%	n/a	0	%	0	%
Expected volatility	71	%	n/a	90	%	100	%
Risk-free interest rate	0.85	%	n/a	0.79	%	0.77	%
Expected term	5.61 years		n/a	5.67 years		5.66 years

(1)

There were no stock options granted during the three months ended September 30, 2020.

Stock option activity for the nine months ended September 30, 2021, was as follows:


			Weighted		Weighted
			Average		Average		Aggregate
			Exercise		Contractual		Intrinsic
	Number of		Price		Term		Value
	shares		Per Share		(in years)		(in thousands)
Outstanding at January 1, 2021		1,827,906	$	20.66		6.31	$	51,401
Granted		213,711		36.32
Exercised		(74,805)		13.54
Forfeited, expired or cancelled		(57,115)		71.26
Outstanding at September 30, 2021		1,909,697	$	21.18		6.02	$	20,077
Exercisable at September 30, 2021		1,595,665	$	19.53		5.45	$	19,276

The aggregate intrinsic value of stock options exercised during the nine months ended September 30, 2021 and 2020 was $1.6 million and $0.1 million, respectively.

The weighted-average grant-date fair value per share of the options granted during the nine months ended September 30, 2021 and 2020 was $26.21 and $16.22, respectively.

As of September 30, 2021, $4.2 million of total unrecognized compensation expense related to stock options is expected to be recognized over a weighted average period of 1.89 years.

Stock-based Compensation Expense

The following table shows total stock-based compensation expense for stock options and ESPP in the condensed consolidated statements of operations and comprehensive loss (in thousands):


	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Research and development	$	—	$	—	$	—	$	—
General and administrative		779		708		4,445		3,269
Total stock-based compensation expense	$	779	$	708	$	4,445	$	3,269