This Article tells the story of a new type of business—the special purpose acquisition corporation ( SPAC ). The promoters of a SPAC begin by forming a shell corporation with no assets. They then take the company public on little more than a promise that they will strive to complete the acquisition of a target in the near future. We present the first empirical study of the SPAC contract design, and use a hand-collected dataset to trace its evolution over the past nine years. While SPACs are a new form, their contract design borrows heavily from private equity\u27s playbook. Private equity managers famously (and sometimes controversially) receive 20% of their funds\u27 profits, and funds typically last only ten years. From the traditional 20...