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	)

HSOP Shares issued to the Partnership and allocated to the HSOP Participants are not considered outstanding for accounting purposes and not included in the calculation of basic weighted average common stock outstanding in the table above because the HSOP Participants have a forfeitable right to distributions until the HSOP Options vest and are exercised, at which time the right becomes nonforfeitable.

The following also represents the maximum amount of outstanding shares of potentially dilutive securities that were excluded from the computation of diluted net loss per share attributable to common shareholders for the periods presented because including them would have been antidilutive:


	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