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Investment in AB
3 Months Ended
Mar. 31, 2021
Equity Method Investments and Joint Ventures [Abstract]  
Investment in AB Investment in AB
Changes in AB Holding’s investment in AB during the three-month period ended March 31, 2021 are as follows (in thousands):
Investment in AB as of December 31, 2020$1,605,941 
Equity in net income attributable to AB Unitholders88,907 
Changes in accumulated other comprehensive income(3,036)
Cash distributions received from AB(106,091)
Additional investments with proceeds from exercise of compensatory options to buy AB Holding Units1,914 
Capital contributions to AB6,096 
AB Holding Units retired(29,847)
AB Holding Units issued to fund long-term incentive compensation plans100,861 
Change in AB Holding Units held by AB for long-term incentive compensation plans(31,802)
Investment in AB as of March 31, 2021$1,632,943