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Units Outstanding
6 Months Ended
Jun. 30, 2018
Equity [Abstract]  
Units Outstanding
Units Outstanding

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

Outstanding as of December 31, 2017
96,461,989

Options exercised
488,513

Units issued
2,471,307

Units retired
(1,392,989
)
Outstanding as of June 30, 2018
98,028,820