Net Loss Per Share (Tables)

12 Months Ended

Dec. 31, 2025

Earnings Per Share [Abstract]

Schedule of Basis and Diluted Net Loss Per Share Attributable to ATAI Stockholders

Basic and diluted net loss per share attributable to atai stockholders were calculated as follows (in thousands, except share and per share data):


		For the year ended December 31,
		2025				2024
Basic and Diluted EPS
Numerator:
Net loss		$	(660,147	)		$	(150,049	)
Net loss attributable to noncontrolling interests			(100	)			(780	)
Net loss attributable to AtaiBeckley Inc. shareholders - basic and diluted		$	(660,047	)		$	(149,269	)
Denominator:
Weighted average common stock outstanding attributable to AtaiBeckley Inc. Stockholders - basic and diluted			226,532,786				160,159,983
Net loss per share attributable to AtaiBeckley Inc. shareholders - basic and diluted		$	(2.91	)		$	(0.93	)

Schedule of Computation of Diluted net Income (Loss) Per Share Attributable to Common Shareholders


		As of December 31,
		2025				2024
Options to purchase common stock			43,533,126				40,042,921
HSOP options to purchase common stock			6,921,829				6,921,829
2018 short-term convertible promissory notes - related parties			—				2,367,200
2018 short-term convertible promissory notes			—				3,818,704
Pre-funded warrants			10,877,216				—
Restricted stock units subject to lock-up			6,971,912
Unvested restricted stock units			-				719,557
			68,304,083				53,870,211