Units Outstanding (Tables)

6 Months Ended

Jun. 30, 2019

Equity [Abstract]

Changes in AB Units Outstanding

Changes in AB Units outstanding during the six-month period ended June 30, 2019 were as follows:

Outstanding as of December 31, 2018	268,850,276
Options exercised	406,235
Units issued	2,068,514
Units retired (1)	(2,509,460	)
Balance as of June 30, 2019	268,815,565

⁽¹⁾ Includes 882 AB Units purchased in private transactions and retired during the first six months of 2019.