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Units Outstanding (Tables)
3 Months Ended
Mar. 31, 2019
Equity [Abstract]  
Changes in Holding Units Outstanding
Changes in AB Holding Units outstanding during the three-month period ended March 31, 2019 are as follows:

Outstanding as of December 31, 2018
96,658,278

Options exercised
334,616

Units issued
381,305

Units retired
(2,379,795
)
Outstanding as of March 31, 2019
94,994,404