
	Year ended December 31,
	2022		2021		2020
Numerator:
Income from continuing operations	$	19.8	$	59.0	$	73.8
Income (loss) from discontinued operations, net of tax	$	(19.6)	$	366.4	$	25.2


Denominator:
Weighted-average number of common shares used in basic income per share	45.345		45.289		44.628
Dilutive securities — Employee stock options and restricted stock units	0.876		1.206		1.138
Weighted-average number of common shares and dilutive securities used in diluted income per share	46.221		46.495		45.766

For the years ended December 31, 2022, 2021, and 2020, 0.240, 0.245, and 0.300, respectively, of unvested restricted stock units were excluded from the computation of diluted earnings per share as the assumed proceeds for these instruments exceeded the average market value of the underlying common stock for the related years. For the years ended December 31, 2022, 2021, and 2020, 0.695, 0.627, and 0.793, respectively, of outstanding stock options were excluded from the computation of diluted earnings per share as the assumed proceeds for these instruments exceeded the average market value of the underlying common stock for the related years.

On May 10, 2022, our Board of Directors re-authorized management, in its sole discretion, to repurchase, in any fiscal year, up to $100.0 of our common stock, subject to maintaining compliance with all covenants of our Credit Agreement. Pursuant to this re-authorization, during the second quarter of 2022, we repurchased 0.707 shares of our common stock for aggregate cash payments of $33.7. As of December 31, 2022, the remaining maximum approximate amount of our common stock that may be purchased under this authorization is $66.3.

At December 31, 2022, we had 200.0 authorized shares of common stock (par value $0.01). Common shares issued, treasury shares and shares outstanding are summarized in the table below.


	Common Stock Issued	Treasury Stock	Shares Outstanding
Balance at December 31, 2019	52.017	(7.814)	44.203


Restricted stock units	—	0.141	0.141
Other	0.688	—	0.688
Balance at December 31, 2020	52.705	(7.673)	45.032

Restricted stock units	—	0.130	0.130

Other	0.306	—	0.306
Balance at December 31, 2021	53.011	(7.543)	45.468

Restricted stock units	—	0.191	0.191

Share repurchases	—	(0.707)	(0.707)
Other	0.340	—	0.340
Balance at December 31, 2022	53.351	(8.059)	45.292

On May 9, 2019, our stockholders approved our 2019 Stock Compensation Plan (the “2019 Plan”) which replaced our 2002 Stock Compensation Plan, as amended in 2006, 2011, 2012 and 2015 (the “Prior Plan”). As a result of the approval of the 2019 Plan, no further awards were permitted to be made under the Prior Plan. Up to 3.851 shares of our common stock were available for grant at December 31, 2022 under the 2019 Plan. The 2019 Plan permits the issuance of new shares or shares from treasury upon the exercise of options, vesting of time-based restricted stock units (“RSU’s”) and performance stock units (“PSU’s”). Each RSU and PSU granted reduces availability by two shares. Similar awards were permitted to be granted under the Prior Plan before the approval of the 2019 Plan.

PSU’s and RSU’s may be granted to certain eligible employees or non-employee directors in accordance with applicable equity compensation plan documents and agreements. Subject to participants’ continued employment and other plan terms and conditions, the restrictions lapse and awards generally vest over a period of time, generally one or three years. In some instances, such as death, disability, or retirement, stock may vest concurrently with or following an employee’s termination. PSU’s are eligible to vest at the end of the performance period, with performance based on the total return of our stock over the three-year performance period against a peer group within the S&P 600 Capital Goods Index, while the RSU’s vest based on the passage of time since grant date. PSU’s and RSU’s that do not vest within the applicable vesting period are forfeited.

We grant RSU’s to non-employee directors under the 2019 Plan. The 2022, 2021 and 2020 grants to non-employee directors generally vest over a 1 year-period, with the 2022 grants scheduled to vest in their entirety immediately prior to the annual meeting of stockholders in May 2023.

Stock options may be granted to key employees in the form of incentive stock options or non-qualified stock options. The option price per share may be no less than the fair market value of our common stock at the close of business the day prior to the date of grant. Upon exercise, the employee has the option to surrender previously owned shares at current value in payment of the exercise price and/or for withholding tax obligations.

The recognition of compensation expense for share-based awards, including stock options, is based on their grant date fair values. The fair value of each award is amortized over the lesser of the award’s requisite or derived service period, which is generally up to three years. Compensation expense within income from continuing operations related to PSU’s, RSU’s and stock options totaled $10.9, $12.9 and $12.0 for the years ended December 31, 2022, 2021 and 2020, respectively, with the related tax benefit being $1.7, $2.2 and $2.0 for the years ended December 31, 2022, 2021 and 2020, respectively.

In years prior to 2020, annual long-term cash awards were granted to executive officers and other members of senior management. These awards were eligible to vest at the end of a three-year performance measurement period, with performance based on our achievement of a target segment income amount over the three-year measurement period. Long-term incentive compensation expense for 2022, 2021, and 2020 included $0.0, $(0.1) and $1.1, respectively, associated with long-term cash awards.

We use the Monte Carlo simulation model valuation technique to determine fair value of our restricted stock awards that contain a market condition (i.e., the PSU’s). The Monte Carlo simulation model utilizes multiple input variables that determine the probability of satisfying the market condition stipulated in the award and calculates the fair value of each PSU. We issued PSU’s to eligible participants on March 1, 2022 and 2021, and February 20, 2020. We used the following assumptions in determining the fair value of these awards:


	Annual Expected Stock Price Volatility		Annual Expected Dividend Yield		Risk-Free Interest Rate		Correlation Between Total Shareholder Return for SPX and the Applicable S&P Index
March 1, 2022
SPX	43.04	%	—	%	1.44	%	62.44	%
Peer group within S&P 600 Capital Goods Index	50.98	%	n/a		1.44	%
March 1, 2021
SPX	42.88	%	—	%	0.25	%	60.24	%
Peer group within S&P 600 Capital Goods Index	51.25	%	n/a		0.25	%
February 20, 2020
SPX	29.47	%	—	%	1.35	%	35.47	%
Peer group within S&P 600 Capital Goods Index	34.93	%	n/a		1.35	%

Annual expected stock price volatility is based on the three-year historical volatility. There is no annual expected dividend yield as we discontinued dividend payments in 2015 and do not expect to pay dividends for the foreseeable future. The average risk-free interest rate is based on the one-year through three-year daily treasury yield curve rate as of the grant date.


	Unvested PSU’s and RSU’s	Weighted-Average Grant-Date Fair Value Per Share
December 31, 2019	0.606	$	36.17
Granted	0.277	46.61
Vested	(0.233)	31.49
Forfeited	(0.006)	41.37
December 31, 2020	0.644	42.32
Granted	0.243	57.24
Vested	(0.219)	37.40
Forfeited	(0.032)	53.69
December 31, 2021	0.636	49.14
Granted	0.307	48.72
Vested	(0.332)	44.16
Forfeited	(0.081)	53.41
December 31, 2022	0.530	$	51.38

As of December 31, 2022, there was $9.8 of unrecognized compensation cost related to PSU’s and RSU’s. We expect this cost to be recognized over a weighted-average period of 1.9 years.

On March 1, 2022 and 2021, and February 20, 2020, we granted stock options totaling 0.105, 0.105, and 0.125, respectively. The exercise price per share of these options is $48.97, $58.34, and $50.09, respectively, and the maximum contractual term of these options is ten years.

The fair value of each stock option granted on March 1 2022 and 2021, and February 20, 2020 was $19.33, $23.49, and $17.40, respectively. The fair value of each option grant was estimated using a Black-Scholes option-pricing model with the following assumptions:


	March 1, 2022		March 1, 2021		February 20, 2020
Annual expected stock price volatility	38.62	%	41.15	%	33.48	%
Annual expected dividend yield	—	%	—	%	—	%
Risk-free interest rate	1.61	%	0.91	%	1.41	%
Expected life of stock option (in years)	6.0		6.0		6.0

Annual expected stock price volatility for the March 1 2022 and 2021, and February 20, 2020 grants were based on a weighted average of SPX’s stock volatility since the Spin-Off and an average of the most recent six-year historical volatility of a peer company group. There is no annual expected dividend yield as we discontinued dividend payments in 2015 and do not expect to pay dividends for the foreseeable future. The average risk-free interest rate is based on the five-year and seven-year treasury constant maturity rates. The expected option life is based on a three-year pro-rata vesting schedule and represents the period of time that awards are expected to be outstanding.


	Shares	Weighted- Average Exercise Price
Options outstanding at December 31, 2019	1.692	$	19.05
Exercised	(0.412)	14.97
Forfeited	—	—
Granted	0.139	49.57
Options outstanding at December 31, 2020	1.419	23.21
Exercised	(0.123)	15.82
Forfeited	(0.008)	50.11
Granted	0.105	58.34
Options outstanding at December 31, 2021	1.393	26.35
Exercised	(0.191)	26.64
Forfeited	(0.043)	51.32
Granted	0.127	50.14
Options outstanding at December 31, 2022	1.286	$	27.82

As of December 31, 2022, 1.092 of the above stock options were exercisable and there was $2.2 of unrecognized compensation cost related to the outstanding stock options. We expect this cost to be recognized over a weighted-average period of 2.4 years.


	Foreign Currency Translation Adjustment		Net Unrealized Gains on Qualifying Cash Flow Hedges(1)		Pension and Postretirement Liability Adjustment(2)		Total
Balance at December 31, 2021	$	252.7	$	0.5	$	10.7	$	263.9
Other comprehensive income (loss) before reclassifications	(13.6)		11.7		0.1		(1.8)
Amounts reclassified from accumulated other comprehensive income	—		(1.2)		(3.4)		(4.6)
Current-period other comprehensive income (loss)	(13.6)		10.5		(3.3)		(6.4)
Balance at December 31, 2022	$	239.1	$	11.0	$	7.4	$	257.5

(2) Net of tax provision of $2.7 and $3.7 as of December 31, 2022 and 2021, respectively. The balances as of December 31, 2022 and 2021 include unamortized prior service credits.


	Foreign Currency Translation Adjustment		Net Unrealized Gains (Losses) on Qualifying Cash Flow Hedges (1)		Pension and Postretirement Liability Adjustment (2)		Total
Balance at December 31, 2020	$	238.6	$	(4.4)	$	14.3	$	248.5
Other comprehensive income (loss) before reclassifications	(5.8)		5.3		—		(0.5)
Amounts reclassified from accumulated other comprehensive income (loss)	19.9		(0.4)		(3.6)		15.9
Current-period other comprehensive income (loss)	14.1		4.9		(3.6)		15.4
Balance at December 31, 2021	$	252.7	$	0.5	$	10.7	$	263.9

(2) Net of tax provision of $3.7 and $4.9 as of December 31, 2021 and 2020, respectively. The balances as of December 31, 2021 and 2020 include unamortized prior service credits.


	Amount Reclassified from AOCI				Affected Line Items in the Consolidated Statements of Operations
	Year ended December 31,
	2022		2021
(Gains) losses on qualifying cash flow hedges:

FX forward contracts	$	(0.1)	$	—	Revenues
Commodity contracts	—		(3.8)		Income from discontinued operations, net of tax
Swaps	(1.5)		3.2		Interest expense
Pre-tax	(1.6)		(0.6)
Income taxes	0.4		0.2
	$	(1.2)	$	(0.4)
Gains on pension and postretirement items:

Amortization of unrecognized prior service credits - Pre-tax	$	(4.4)	$	(4.8)	Other income (expense), net

Income taxes	1.0		1.2
	$	(3.4)	$	(3.6)

Loss on reclassification of foreign currency translation adjustments:
DBT	$	—	$	19.9	Gain (loss) on disposition of discontinued operations, net of tax
Income taxes	—		—
	$	—	$	19.9

During the years ended December 31, 2022, 2021 and 2020, “Common stock in treasury” was decreased by the settlement of restricted stock units, net of recipient tax withholdings, issued from treasury stock of $12.1, $7.7 and $8.4, respectively. During the year ended December 31, 2022, “Common stock in treasury” was increased by the previously mentioned repurchase of our common stock for aggregate cash payments of $33.7.