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Units Outstanding
9 Months Ended
Sep. 30, 2020
Equity [Abstract]  
Units Outstanding Units Outstanding
Changes in AB Units outstanding during the nine-month period ended September 30, 2020 were as follows:
 
Outstanding as of December 31, 2019270,380,314 
Options exercised5,182 
Units issued422,703 
Units retired(1)
(2,446,115)
Outstanding as of September 30, 2020268,362,084 
(1) During the nine-months ended September 30, 2020, we purchased 700 AB Units in private transactions and retired them.