Backstop Agreement

Backstop agreements are the institutional cousin of non-redemption agreements, providing a different mechanism to solve the same problem: ensuring enough cash survives redemptions to close the deal. In a backstop, a committed buyer (the "backstop provider") agrees to purchase shares from the SPAC at or below the redemption price, absorbing shares that would otherwise be tendered to the trust.

The economics favor the backstop provider. They typically purchase shares at a discount to the per-share trust value — for example, buying at $9.80 per share when the trust value is $10.50 — and may receive additional sweeteners such as bonus warrants or a backstop fee. In exchange, they commit capital that ensures deal certainty, making them the marginal capital provider in the transaction.

Backstop structures have evolved significantly since their emergence in 2022–2023. Early backstops were simple share purchases. Modern structures can include "recycling" provisions (where the backstop provider redeems on the same day they purchase, earning the spread between purchase price and redemption price), forward-purchase elements, and complex waterfall structures that allocate economics between the backstop provider, the sponsor, and the target.

The proliferation of backstop-driven deal structures has created a specialized ecosystem of hedge funds that function as SPAC deal facilitators rather than traditional investors. These funds evaluate SPAC deals primarily on the backstop economics (the spread, the warrant sweetener, and the likelihood of closing) rather than the target company's fundamentals. SpacDesk tracks backstop agreements with deal terms, provider names (where disclosed), and the aggregate capital committed.