1. On May 31, 2019, Sirius XM Holdings Inc. ("Sirius XM") paid a cash dividend of $0.0121 per share on each share of its outstanding common stock. The dividend was payable to all holders of Sirius XM's common stock on the record date, May 10, 2019. Pursuant to the terms of the agreement governing the outstanding restricted stock units held by the filer, the filer received certain additional restricted stock units as a result of this cash dividend. These additional units are subject to the same conditions regarding vesting and settlement as the underlying restricted stock units to which they relate.