An S Corporation is a US federal tax election that allows a domestic corporation or LLC to pass profits and losses through to shareholders. Named after Subchapter S of the Internal Revenue Code, the election is not a separate entity type but a tax classification that avoids the double taxation C-corporations face. S-corp status is subject to restrictions on shareholder type, count (100 maximum), and stock structure (one class only) that make it largely incompatible with venture-backed startups. It is a popular structure for small businesses with US-citizen owners and incompatible with the cap-table realities of most institutional fundraising.
The restrictions that disqualify most venture-track startups: maximum 100 shareholder...