The Company maintains a compensation arrangement with Acadian LLC whereby in exchange for continued service, Acadian LLC equity is either purchased by, or granted to Acadian LLC key employees subject to a limit imposed by the Company, and may be repurchased either by Acadian LLC key employees or by the Company at a future date at the then applicable fair value, subject to service requirements having been met. Compensation expense is recognized over the requisite service period equal to the cumulative vested fair value of the award at the end of each period up to the vesting date.

The Company accounts for the arrangement as “cash-settled” share-based payments, and accordingly a corresponding share-based payment liability is recorded. The fair value of the liabilities are determined with the assistance of third party valuation specialists using discounted cash flow analyses, which incorporate assumptions for the forecasted earnings information, market risk adjustments, discount rates, when award holders maximize value and post-vesting restrictions. Vested Acadian LLC liability-classified equity awards are revalued at each period end until settlement date, with changes in the liabilities included within compensation expense.


	2024		2023		2022
Balance, beginning of period	$	23.0	$	19.4	$	28.1
Amortization and revaluation of granted awards	10.5		6.2		(4.6)


Repurchases (cash-settled)	(8.1)		(2.6)		(4.1)
Balance, end of period	$	25.4	$	23.0	$	19.4

The Company has established various plans under which it is authorized to grant restricted stock awards (“RSAs”), restricted stock units (“RSUs”), performance-based restricted stock awards (“Performance-based RSAs”), performance-based restricted stock units (“Performance-based RSUs”) and stock option awards. These plans are maintained to provide equity-based compensation arrangements to employees and non-executive directors. Equity ownership encourages employees and directors to act in the best long-term interests of the Company. As of December 31, 2024, the Company had 4.5 million shares of common stock available to be granted under the various plans.

Compensation expense recognized by the Company for the years ended December 31, 2024, 2023 and 2022 in relation to these awards was $0.9 million, $1.2 million, and $2.4 million respectively. The related income tax benefit recognized for years ended December 31, 2024, 2023 and 2022 was $0.1 million, $0.2 million and $0.3 million respectively. Unamortized compensation expense related to unvested RSUs at December 31, 2024 of $1.2 million is expected to be recognized over a weighted-average period of 1.6 years. The service inception date for annual awards granted in 2024 is deemed to be January 1, 2023. It is anticipated that annual awards for 2024 with a fair value of $0.8 million will be granted during 2025 with a service inception date of January 1, 2024.


	2024			2023			2022
Acadian Asset Management Inc. RSAs	Number of shares	Weighted average grant date fair value per share		Number of shares	Weighted average grant date fair value per share		Number of shares	Weighted average grant date fair value per share
Outstanding at beginning of the year	—	$	—	—	$	—	2,500	$	10.09

Granted during the year	—	—		—	—		—	—
Forfeited during the year	—	—		—	—		(125)	10.09
Vested during the year	—	—		—	—		(2,375)	10.09

Outstanding at end of the year	—	$	—	—	$	—	—	$	—

The grant date fair value per share, calculated based on the closing price as quoted on the New York Stock Exchange on the measurement date, is used to determine the fair value of restricted stock awards granted to employees. There were no RSAs granted by the Company during the years ended December 31, 2024, 2023 and 2022. Restricted stock awards under the plan generally have a vesting period of one to three years.


	2024			2023			2022
Acadian Asset Management Inc. RSUs	Number of shares	Weighted average grant date fair value per share		Number of shares	Weighted average grant date fair value per share		Number of shares	Weighted average grant date fair value per share
Outstanding at beginning of the year	48,797	$	24.19	71,664	$	20.95	38,703	$	15.33
Granted during the year	44,639	21.68		49,494	24.04		59,999	22.62
Forfeited during the year	—	—		(15,823)	25.05		(3,003)	17.55
Vested during the year	(30,747)	23.54		(56,538)	19.72		(24,035)	16.51

Outstanding at end of the year	62,689	$	22.80	48,797	$	24.19	71,664	$	20.95

The grant date fair value per share, calculated based on the closing price as quoted on the New York Stock Exchange on the measurement date, is used to determine the fair value of restricted stock units granted to employees. Restricted stock units under the plan generally have a vesting period of one to three years.


	2024			2023			2022
Acadian Asset Management Inc. Performance-based RSUs	Number of shares	Weighted average grant date fair value per share		Number of shares	Weighted average grant date fair value per share		Number of shares	Weighted average grant date fair value per share
Outstanding at beginning of the year	—	$	—	—	$	—	9,013	$	14.62


Vested during the year	—	—		—	—		(7,932)	14.62
Other movements	—	—		—	—		(1,081)	14.62
Outstanding at end of the year	—	$	—	—	$	—	—	$	—

Other movements includes performance-based RSUs that did not meet the market vesting condition and did not vest during the year ended December 31, 2022. There were no performance-based RSUs granted by the Company during the years ended December 31, 2024, 2023, and 2022. Performance-based RSUs under the plan have a vesting period of three years.


	2024
	Stock Options	Weighted average exercise price		Weighted average remaining contractual term (in years)	Aggregate intrinsic value
Outstanding at beginning of the year	1,659,000	$	10.64	0.8
Granted during the year	—	—
Forfeited during the year	—	—
Exercised during the year	(1,659,000)	10.64
Outstanding at end of the year	—	$	—	0.0	$	—
Exercisable at end of the year	—	$	—	0.0	$	—


	2023
	Stock Options	Weighted average exercise price		Weighted average remaining contractual term (in years)	Aggregate intrinsic value
Outstanding at beginning of the year	2,470,463	$	10.97	1.6
Granted during the year	—	—
Forfeited during the year	(75,000)	10.00
Exercised during the year	(736,463)	11.80
Outstanding at end of the year	1,659,000	$	10.64	0.8	$	14,128,440
Exercisable at end of the year	1,659,000	$	10.64	0.8	$	14,128,440


	2022
	Stock Options	Weighted average exercise price		Weighted average remaining contractual term (in years)	Aggregate intrinsic value
Outstanding at beginning of the year	2,969,963	$	11.09	2.5


Exercised during the year	(499,500)	11.70
Outstanding at end of the year	2,470,463	$	10.97	1.6	$	23,746,573
Exercisable at end of the year	1,441,463	$	11.03	1.5	$	13,767,753

There were no stock options granted by the Company during the year ended December 31, 2024, 2023, and 2022. The total fair value of options vested during the years ended December 31, 2024, 2023 and 2022 was $0.0 million, $1.3 million and $1.3 million, respectively. The total intrinsic value of options exercised during the years ended December 31, 2024, 2023 and 2022 was $24.7 million, $5.1 million and $6.0 million, respectively. The Company received $0.1 million, $0.0 million and $0.0 million related to the exercise of options for the year ended December 31, 2024, 2023, and 2022, respectively. The Company realized tax benefits of $0.1 million, $0.3 million, and $0.3 million related to the exercise of options for the year ended December 31, 2024, 2023, and 2022, respectively. Shares issued upon exercise of the options represent newly issued shares.