Filing: CEO of Block's Square unit Alyssa Henry plans to step down on October 2 after nine years at the company; Jack Dorsey will become the "Square Head" (Catherine Thorbecke/CNN)

Catherine Thorbecke / CNN: Filing: CEO of Block's Square unit Alyssa Henry plans to step down on October 2 after nine years at the company; Jack Dorsey will become the “Square Head”  —  Alyssa Henry, the CEO of Square - a unit of Jack Dorsey's fintech company, Block - will leave her post at the company next month.

Filing: CEO of Block's Square unit Alyssa Henry plans to step down on October 2 after nine years at the company; Jack Dorsey will become the "Square Head" (Catherine Thorbecke/CNN)

Catherine Thorbecke / CNN:
Filing: CEO of Block's Square unit Alyssa Henry plans to step down on October 2 after nine years at the company; Jack Dorsey will become the “Square Head”  —  Alyssa Henry, the CEO of Square - a unit of Jack Dorsey's fintech company, Block - will leave her post at the company next month.