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Units Outstanding
6 Months Ended
Jun. 30, 2016
Equity [Abstract]  
Units Outstanding
Units Outstanding

Changes in AB Units outstanding during the six-month period ended June 30, 2016 were as follows:
 
 
 
Outstanding as of December 31, 2015
272,301,827

Options exercised
139,093

Units issued
323,094

Units retired
(3,986,361
)
Balance as of June 30, 2016
268,777,653



During the first six months of 2016, we purchased 14,338 AB Units in private transactions and retired them.