IPO filing research

Harbour Island Acquisition Corp. I

Blank Checks

ipo filed S-1

Harbour Island Acquisition Corp. I IPO research page with SEC filing history, offering status, deal terms, structured filing extracts, company news, and comparable IPO context. Latest filing: S-1 on 2026-09-09.

Filing Timeline

SEC EDGAR

S-1 filed

Initial registration statement

Initial public filing submitted to start the SEC review process.

Follows DRS in the pre-IPO sequence.

2026-09-09 · 0001213900-26-098404

DRS filed

Draft registration statement

Draft registration filed confidentially before the public launch.

First tracked pre-IPO filing for this issuer.

2026-07-28 · 0001213900-26-082061

Comparable Deals

1 comparable deal

FinancialsLast 18 months

Only 0 strict matches; expanded to 1 using nearest neighbors.

+18.1%

Median day-1

100%

Above issue

+24.6%

Median week-1

+18.1%

Downside (p10)

EagleRock Land, LLC EROK

2026-05-14 $320M Day 1: +18.1% Wk 1: +24.6%

same SIC grouprecent IPO

Recent News

No recent news stored for this issuer.