CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Revenue		$ 838,692	$ 731,593	$ 639,111
Operating expenses:
Cost of services (excluding depreciation and amortization)		595,085	461,777	399,900
Sales, general and administrative		176,732	131,947	114,661
Equity restructuring costs		193,163	0	0
Depreciation and amortization		9,005	8,325	7,691
Total operating expenses		973,985	602,049	522,252
Operating (loss) income		(135,293)	129,544	116,859
Interest income		4,166	4,524	2,660
Interest expense		(1,436)	(64)	(138)
Other income, net		5,391	3,192	1,559
(Loss) income before income tax expense		(127,172)	137,196	120,940
Income tax expense		2,997	2,395	2,257
Net (loss) income		(130,169)	$ 134,801	$ 118,683
Net income		(127,845)
Net loss attributable to Andersen Group Inc.	[1]	$ (2,324)
Common Class A
Operating expenses:
Net loss per share of Class A common stock, basic (in dollars per share)	[2]	$ (0.18)
Weighted-average shares of Class A common stock outstanding, basic (in shares)	[2]	12,650,000
Net loss per share of Class A common stock, diluted (in dollars per share)	[2]	$ (0.22)
Weighted-average shares of Class A common stock outstanding, diluted (in shares)	[2]	110,944,464

[1] Represents net loss attributable to Andersen Group Inc. for the period following the IPO and Reorganization Transactions as described in Note 1 in the accompanying notes.

[2] Represents net loss per share of Class A common stock and weighted-average shares of Class A common stock outstanding for the period following the IPO and Reorganization Transactions as described in Note 1 in the accompanying notes. Refer to Note 15 in the accompanying notes for further information on the determination of the net loss per share and weighted-average share amounts.