How does a SPAC work from IPO through de-SPAC merger, and what protections do public shareholders have?

A Special Purpose Acquisition Company (SPAC) is a shell entity that IPOs with the sole purpose of acquiring a private company within a set timeframe (typically 18-24 months). It provides an alternative path to public markets for target companies, bypassing the traditional IPO process.\n\nSPAC Lifecycle:\n\n`mermaid\ngraph TD\n A[\"1. SPAC Formation
Sponsor contributes ~$5M
for 20% founder shares\"] --> B[\"2. IPO
Sell units at $10
(1 share + 1/2 warrant)\"]\n B --> C[\"3. Trust Account
~100% of IPO proceeds
held in T-bills\"]\n C --> D[\"4. Target Search
18-24 month deadline\"]\n D --> E{\"5. Target Found?\"}\n E -->|\"Yes\"| F[\"6. Announce Merger
Shareholder vote\"]\n E -->|\"No\"| G[\"7. Liquidation
Return trust to shareholders\"]\n F --> H{\"8. Shareholders
Approve?\"}\n H -->|\"Yes\"| I[\"9. De-SPAC
Combined entity trades\"]\n H -->|\"Redeem\"| J[\"10. Get ~$10/share
back from trust\"]\n`\n\nWorked Example:\nNorthgate Acquisition Corp (SPAC) IPOs raising $300 million:\n\n| Component | Details |\n|---|---|\n| Units offered | 30 million at $10 each |\n| Unit composition | 1 share + 1/2 warrant (strike: $11.50) |\n| Trust account | $300M invested in T-bills |\n| Sponsor promote | 7.5M founder shares (20% of post-IPO shares) for $25K |\n| Underwriter fees | 2% at IPO + 3.5% deferred (paid at de-SPAC) |\n| Deadline | 24 months to complete acquisition |\n\nAfter 14 months, Northgate announces a merger with Clearpath Robotics valued at $1.2 billion.\n\nShareholder Economics:\n- If you hold through de-SPAC: you own shares in Clearpath at the negotiated valuation\n- If you redeem: you receive approximately $10.35/share (original $10 + T-bill interest)\n- You keep your warrants regardless of redemption\n\nThe Sponsor's Sweet Deal:\nThe sponsor paid $25,000 for 7.5 million founder shares. At a $10 share price, those shares are worth $75 million — a 300,000% return on their initial investment, regardless of how the acquisition performs.\n\nWhy Redemptions Matter:\nIf 80% of shareholders redeem (common in recent years), only $60M of the $300M remains for the acquisition. The SPAC must then raise additional capital through PIPE investments, or the deal collapses. This creates significant deal uncertainty.\n\nInvestor Protections:\n1. Redemption right: guaranteed $10+ per share return if you dislike the target\n2. Trust account: IPO proceeds ring-fenced, cannot be used for operations\n3. Shareholder vote: majority must approve the proposed merger\n4. Warrant retention: even redeeming shareholders keep warrants\n\nStudy SPAC mechanics in depth in our CFA Corporate Finance course.