Founder Shares

Founder shares are the equity stake that compensates the SPAC sponsor for organizing, funding, and managing the blank-check company through its search for a target. The sponsor typically purchases these shares for $25,000 — a nominal sum relative to their potential value — before the IPO. The initial share count is sized so that founder shares represent exactly 20% of total shares outstanding after the IPO (the "promote").

Founder shares are typically designated as Class B common stock with identical voting rights to the Class A shares sold in the IPO. The key structural differences are economic: founder shares have no redemption rights (the sponsor cannot redeem into the trust), are subject to lockup restrictions post-closing, and convert to Class A shares on a one-for-one basis when the business combination closes.

The 20% ratio is maintained through an anti-dilution provision. If the SPAC issues additional shares (for a PIPE, for example), the conversion ratio adjusts so that founder shares still represent 20% on an as-converted basis at closing. Some sponsors voluntarily forfeit a portion of founder shares to reduce dilution when closing a deal with high redemptions — a practice known as a "promote haircut."

Founder shares are the primary source of the misalignment critique in SPAC economics. Because the sponsor receives 20% of the equity for a nominal investment, they profit handsomely from any deal that closes — even a mediocre one. This has driven innovation in promote structures, including performance-based vesting, reduced promote percentages, and alignment mechanisms that tie sponsor economics to post-merger stock performance.