CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Dec. 26, 2021	Dec. 27, 2020
Current assets:
Cash and cash equivalents	$ 349.4	$ 380.8
Restricted cash	0.0	0.7
Accounts receivable, net	93.9	95.3
Unbilled receivables, net	190.8	177.0
Inventoried costs	91.7	81.2
Prepaid expenses	9.8	12.0
Other current assets	22.5	17.8
Total current assets	758.1	764.8
Property, plant and equipment, net	168.3	143.8
Operating lease right-of-use assets	38.5	42.9
Goodwill	493.9	483.9
Intangible assets, net	43.2	43.0
Other assets	87.5	84.4
Total assets	1,589.5	1,562.8
Current liabilities:
Accounts payable	50.4	55.4
Accrued expenses	27.2	34.7
Accrued compensation	47.3	48.1
Accrued interest	1.5	1.5
Billings in excess of costs and earnings on uncompleted contracts	58.1	34.0
Current portion of operating lease liabilities	10.1	8.9
Other current liabilities	25.7	11.9
Current liabilities of discontinued operations	0.8	3.1
Total current liabilities	221.1	197.6
Long-term debt	296.7	301.0
Operating lease liabilities, net of current portion	32.7	38.6
Other long-term liabilities	76.2	83.0
Long-term liabilities of discontinued operations	2.5	2.5
Total liabilities	629.2	622.7
Commitments and contingencies
Redeemable noncontrolling interest	15.2	14.8
Stockholders’ equity:
Preferred stock, $0.001 par value, 5,000,000 authorized, 0 shares outstanding at December 26, 2021 and December 27, 2020	0.0	0.0
Common stock, $0.001 par value, 195,000,000 shares authorized; 123,987,424 and 123,047,147 shares issued and outstanding at December 26, 2021 and December 27, 2020, respectively	0.0	0.0
Additional paid-in capital	1,578.9	1,556.3
Accumulated other comprehensive loss	0.6	1.4
Accumulated deficit	(634.4)	(632.4)
Total stockholders’ equity	945.1	925.3
Total liabilities and stockholders’ equity	$ 1,589.5	$ 1,562.8