Units Outstanding (Tables)

6 Months Ended

Jun. 30, 2018

Equity [Abstract]

Changes in AB Units Outstanding

Changes in AB Units outstanding during the six-month period ended June 30, 2018 were as follows:

Outstanding as of December 31, 2017	268,659,333
Options exercised	488,513
Units issued	2,471,307
Units retired (1)	(1,396,739	)
Balance as of June 30, 2018	270,222,414

⁽¹⁾ Includes 3,750 AB Units purchased in private transactions and retired during the first six months of 2018.