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Units Outstanding
9 Months Ended
Sep. 30, 2017
Equity [Abstract]  
Units Outstanding
Units Outstanding

Changes in AB Units outstanding during the nine-month period ended September 30, 2017 were as follows:
 
 
 
Outstanding as of December 31, 2016
268,893,534

Options exercised
1,039,632

Units issued
1,944,310

Units retired (1)
(6,053,419
)
Balance as of September 30, 2017
265,824,057



(1) Includes 43,600 AB Units purchased in private transactions and retired during the first nine months of 2017.