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Units Outstanding
 12 Months Ended
Dec. 31, 2017
Equity [Abstract]  
Units Outstanding
Units Outstanding

Changes in AB Holding Units outstanding for the years ended December 31, 2017 and 2016 are as follows:
 
2017
 
2016
Outstanding as of January 1,
96,652,190

 
100,044,485

Options exercised
1,179,860

 
358,262

Units issued
5,546,695

 
4,455,944

Units retired
(6,916,756
)
 
(8,206,501
)
Outstanding as of December 31,
96,461,989

 
96,652,190