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Units Outstanding (Tables)
9 Months Ended
Sep. 30, 2018
Equity [Abstract]  
Changes in Holding Units Outstanding
Changes in AB Holding Units outstanding during the nine-month period ended September 30, 2018 are as follows:

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

Options exercised
629,493

Units issued
2,712,263

Units retired
(3,430,781
)
Outstanding as of September 30, 2018
96,372,964