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S-1/A ·Filed Oct 7, 2026
HR

HRIA

Harbour Island Acquisition Corp. I
NEUTRAL
Impact 3/10
Horizonweeks Processed19d 16h ago SEC0001213900-26-107627
IPO registration amendment
Actionable Insight • Neutral

Monitor for the effectiveness of the registration statement and the commencement of trading. The key catalyst will be the announcement of a target business combination within the 15-month window. The sponsor's low-cost founder shares create an incentive to complete any deal, increasing the risk of a value-destructive acquisition for public shareholders.

DirectionNeutral
Confidencemedium
Horizonweeks

Executive Summary

Harbour Island Acquisition Corp. I filed Amendment No. 1 to its S-1 registration statement for a $100 million SPAC IPO. The company is a blank check company targeting industrial materials, semiconductors, AI, data infrastructure, robotics, and aerospace/defense. The offering consists of 10,000,000 units at $10.00 per unit, each comprising one Class A ordinary share and one warrant exercisable at $11.50. The sponsor purchased founder shares at ~$0.007 per share, creating immediate and substantial dilution for public shareholders. The company has 15 months from closing to complete an initial business combination or it will liquidate.

Key Facts

  • Offering 10,000,000 units at $10.00 per unit, each consisting of one Class A ordinary share and one warrant exercisable at $11.50 per share.
  • Total gross proceeds of $100,000,000 from the public offering, plus $3,100,000 from a private placement of 310,000 units to the sponsor.
  • $100,750,000 (or $115,862,500 if over-allotment exercised) will be deposited in a trust account, representing $10.075 per unit.
  • Sponsor purchased 3,833,333 Class B founder shares for $25,000 (~$0.007 per share), subject to forfeiture of up to 500,000 shares if over-allotment not exercised.
  • Company has 15 months from closing to complete an initial business combination or it will redeem public shares and liquidate.
  • Target enterprise values of approximately $100 million to $500 million in technology and technology-infrastructure sectors.
  • No operating history, no revenues, and no target business selected as of the filing date.

Financial Impact

IPO gross proceeds of $100,000,000 from public offering plus $3,100,000 from private placement. Trust account funded with $100,750,000 ($10.075 per unit). Sponsor's founder shares acquired at ~$0.007 per share vs. $10.00 offering price, creating ~$2.88 per share dilution for public shareholders.

dilutiontrust account valueoffering size

Risk Factors

  • No operating history and no identified acquisition target.
  • Immediate and substantial dilution for public shareholders due to sponsor's nominal founder share price.
  • 15-month deadline to complete a business combination creates pressure to accept unfavorable terms.
  • Potential conflicts of interest between sponsor/management and public shareholders.
  • Risk of being deemed an investment company under the Investment Company Act if business combination is not completed in a timely manner.

Documents Analyzed

This report is based on 3 SEC documents filed with EDGAR.

DocumentAccession Number
S-1/A Filing (Primary)0001213900-26-107627
Document: ea029915403ex3-2.htm0001213900-26-107627
Document: ea029915403ex1-1.htm0001213900-26-107627

US Market Status

Market Open — Closes in 6h 27m

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Report published Oct 7, 2026