CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Sep. 25, 2022	Dec. 26, 2021
Current assets:
Cash and cash equivalents	$ 125.2	$ 349.4
Accounts receivable, net	83.7	93.9
Unbilled receivables, net	218.5	190.8
Inventoried costs	120.3	91.7
Prepaid expenses	13.6	9.8
Other current assets	40.0	22.5
Total current assets	601.3	758.1
Property, plant and equipment, net	217.9	168.3
Operating lease right-of-use assets	41.7	38.5
Goodwill	551.8	493.9
Intangible assets, net	61.9	43.2
Other assets	93.5	87.5
Total assets	1,568.1	1,589.5
Current liabilities:
Accounts payable	53.5	50.4
Accrued expenses	29.5	27.2
Accrued compensation	54.5	47.3
Accrued interest	0.3	1.5
Billings in excess of costs and earnings on uncompleted contracts	48.9	58.1
Current portion of operating lease liabilities	10.7	10.1
Other current liabilities	15.2	25.7
Current liabilities of discontinued operations	0.9	0.8
Total current liabilities	213.5	221.1
Long-term debt, net of current portion	292.6	296.7
Operating lease liabilities, net of current portion	35.3	32.7
Other long-term liabilities	82.1	76.2
Long-term liabilities of discontinued operations	1.4	2.5
Total liabilities	624.9	629.2
Commitments and contingencies
Redeemable noncontrolling interest	7.8	15.2
Stockholders’ equity:
Preferred stock, $0.001 par value, 5,000,000 shares authorized, 0 shares outstanding at September 25, 2022 and December 26, 2021	0.0	0.0
Common stock, $0.001 par value, 195,000,000 shares authorized; 125,947,889 and 123,987,424 shares issued and outstanding at September 25, 2022 and December 26, 2021, respectively	0.0	0.0
Additional paid-in capital	1,602.1	1,578.9
Accumulated other comprehensive income (loss)	(3.7)	0.6
Accumulated deficit	(663.0)	(634.4)
Total stockholders’ equity	935.4	945.1
Total liabilities and stockholders’ equity	$ 1,568.1	$ 1,589.5