The following table summarizes our stock-based compensation expense, including stock options, restricted stock units ("RSUs") and performance stock units ("PSUs"), for the three and six months ended June 30, 2026 and 2025:


	Three Months Ended June 30,						Six Months Ended June 30,
(in millions)	2026			2025			2026		2025
Stock option compensation expense	$	—		$	—		$	—	$	0.1
RSU compensation expense		3.7			1.5			5.0		4.9
PSU compensation expense		(0.9	)		(1.0	)		2.2		3.3
Total stock-based compensation expense	$	2.8		$	0.5		$	7.2	$	8.3

We generally recognize expense for stock-based awards ratably over the vesting period. During the second quarter of 2026, stock compensation grants were made consisting of 1,311,987 PSUs and 31,170 RSUs; in addition, the Company's Board of Directors approved the annual stock compensation grant to eligible non-employee directors, which consisted of 262,472 RSUs.

The following table summarizes our unrecognized compensation expense and the weighted-average period over which the expense will be recognized as of June 30, 2026:


	June 30, 2026
(in millions, except weighted average years)	Unrecognized Compensation Expense	Weighted Average Years Expense To Be Recognized Over
RSUs	$10.7	2.3
PSUs	$2.9	1.8