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Units Outstanding (Tables)
6 Months Ended
Jun. 30, 2019
Equity [Abstract]  
Changes in Holding Units Outstanding

Changes in AB Holding Units outstanding during the six-month period ended June 30, 2019 are as follows:

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

Options exercised
406,235

Units issued
2,068,514

Units retired
(2,508,578
)
Outstanding as of June 30, 2019
96,624,449