KEYY Keystone Acquisition Corp.

NEUTRAL Impact: 5/10 424B4
Horizon months Filed Jun 3, 2026 Processed 1d 23h ago SEC 0001213900-26-064746
Prospectus supplement

Executive Summary

Keystone Acquisition Corp., a blank check SPAC, has completed its $250 million IPO of 25,000,000 units at $10.00 per unit, each consisting of one Class A ordinary share and one-half of one redeemable warrant. The proceeds, along with $7.625 million from a concurrent private placement of warrants, will be placed in a trust account to fund a future business combination. The company has 21 months to identify and close a merger target, with no target selected or discussions initiated to date.

Key Financial Metrics

Offering Size
$250.0M

Actionable Insight

Monitor for any 8-K filings announcing a definitive business combination agreement. The 21-month deadline creates a ticking clock; the stock may trade near trust value (~$10.025) until a target is announced. Watch for any insider purchases or non-redemption agreements that signal deal progress.

Key Facts

  • IPO of 25,000,000 units at $10.00/unit for gross proceeds of $250,000,000.
  • Each unit consists of one Class A ordinary share and one-half of one redeemable warrant (exercise price $11.50).
  • Underwriters have a 45-day option to purchase up to an additional 3,750,000 units.
  • Total gross proceeds including private placement warrants: $257,625,000.
  • $250,625,000 will be deposited into a trust account ($10.025 per unit).
  • Sponsor and independent directors hold 8,333,333 Class B founder shares (post-forfeiture) purchased for $25,000 (~$0.003/share).
  • Sponsor and underwriters committed to purchase 7,625,000 private placement warrants at $1.00/warrant.
  • Company has 21 months from closing (by ~March 2028) to complete an initial business combination.
  • Units to trade on Nasdaq under symbol 'KEYYU'; Class A shares under 'KEYY' and warrants under 'KEYYW'.
  • No target business has been selected; no substantive discussions initiated.

Financial Impact

IPO raises $250M in gross proceeds; trust account holds $250.625M ($10.025/unit). Sponsor's founder shares acquired for $25,000 represent 25% of post-IPO shares, creating immediate dilution for public shareholders.

dilutioncash_position

Risk Factors

  • No identified acquisition target; risk of liquidation if no deal within 21 months.
  • Immediate and substantial dilution for public shareholders due to sponsor's nominal cost for founder shares ($0.003 vs. $10.00 IPO price).
  • Potential conflicts of interest: sponsor and management incentivized to complete any deal to avoid losing their investment.
  • Public shareholders may face significant dilution from conversion of founder shares, exercise of warrants, and future PIPE issuances.
  • Risk of being deemed an investment company under the Investment Company Act if deal timeline extends.

Documents Analyzed

This report is based on 4 SEC documents filed with EDGAR.

DocumentAccession Number
424B4 Filing (Primary)0001213900-26-064746
Document: 0001213900-26-064746-index-headers.html0001213900-26-064746
Document: 0001213900-26-064746-index.html0001213900-26-064746
Document: 0001213900-26-064746.txt0001213900-26-064746
9 reports for KEYY
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Jun 5, 2026
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Press Release
NEUTRAL ★ 5/10
awaiting T+20
Jun 3, 2026
1d ago
424B4
NEUTRAL ★ 5/10
awaiting T+20
Jun 3, 2026
2d ago
EFFECT
NEUTRAL ★ 5/10
awaiting T+20
Jun 3, 2026
2d ago
3
NEUTRAL ★ 2/10
awaiting T+20
Jun 3, 2026
2d ago
3
NEUTRAL ★ 2/10
awaiting T+20
Jun 3, 2026
2d ago
3
NEUTRAL ★ 2/10
awaiting T+20
Jun 3, 2026
2d ago
3
NEUTRAL ★ 1/10
awaiting T+20
Jun 2, 2026
2d ago
Press Release
NEUTRAL ★ 4/10
awaiting T+20
May 28, 2026
7d ago
S-1/A
NEUTRAL ★ 5/10
awaiting T+20
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