Net Income per Unit

Basic net income per unit is derived by reducing net income for the 1% general partnership interest and dividing the remaining 99% by the basic weighted average number of limited partnership units outstanding for each period. Diluted net income per unit is derived by reducing net income for the 1% general partnership interest and dividing the remaining 99% by the total of the diluted weighted average number of limited partnership units outstanding for each period.



	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
	(in thousands, except per unit amounts)
Net income attributable to AB Unitholders	$	166,252	$	181,665	$	315,366	$	365,861

Weighted average limited partnership units outstanding – basic	268,475		270,564		267,909		269,870
Dilutive effect of compensatory options to buy AB Holding Units	48		272		60		303
Weighted average limited partnership units outstanding – diluted	268,523		270,836		267,969		270,173
Basic net income per AB Unit	$	0.61	$	0.66	$	1.17	$	1.34
Diluted net income per AB Unit	$	0.61	$	0.66	$	1.17	$	1.34

For both the three and six months ended June 30, 2019, we excluded 29,056 options from the diluted net income computation due to their anti-dilutive effect. For the three and six months ended June 30, 2018 , we excluded 850,155 options and 1,211,906 options, respectively, from the diluted net income computation due to their anti-dilutive effect.