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Units Outstanding
 3 Months Ended
Mar. 31, 2020
Equity [Abstract]  
Units Outstanding
Units Outstanding

Changes in AB Holding Units outstanding during the three-month period ended March 31, 2020 are as follows:

Outstanding as of December 31, 2019
98,192,098

Options exercised
5,182

Units issued
344,698

Units retired
(748,763
)
Outstanding as of March 31, 2020
97,793,215