Units Outstanding (Tables)

3 Months Ended

Mar. 31, 2018

Equity [Abstract]

Changes in AB Units Outstanding

Changes in AB Units outstanding during the three-month period ended March 31, 2018 were as follows:

Outstanding as of December 31, 2017	268,659,333
Options exercised	235,105
Units issued	949,185
Units retired (1)	(3,686	)
Balance as of March 31, 2018	269,839,937

⁽¹⁾ Includes 1,150 AB Units purchased in private transactions and retired during the first three months of 2018.