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Keystone Acquisition Corp.KEYY

Class A KEYYUnits KEYYUWarrants KEYYWCIK 0002102771

Cash in trust

$289.0M

$288,973,581

Trust per share

$10.05

Redemption value

IPO

Jun 2026

$287.5M raised

Combination deadline

Mar 4, 2028

546 days remaining

Filings on record

22

Latest Aug 13, 2026

Overview

Keystone Acquisition Corp. is a special purpose acquisition company incorporated in Cayman Islands and registered with the SEC under CIK 0002102771. It completed its initial public offering in Jun 2026, raising $287.5M in gross proceeds and listing on Nasdaq. Class A shares trade under the ticker KEYY, units under KEYYU, warrants under KEYYW on Nasdaq. The vehicle is sponsored by Keystone International Acquisition Management through Keystone International Acquisition Management LLC. IPO closed, trust funded, no definitive agreement announced.

we intend to focus our search on companies that sit within high growth sectors related to innovation in United States industrial development, with an emphasis on energy transition & critical minerals, shipbuilding & maritime engineering, semiconductors & advanced electronics, digital infrastructure & data centers, and digital assets & crypto treasuries.
The mandate, as stated in the IPO prospectus
North America

Reading the filings

Arithmetic on what Keystone Acquisition Corp. has disclosed, written the way a desk would read it. These are observations, not a rating. Nothing here scores the vehicle or implies a view on it.

  • Trading at a discount to trust

    At $9.92 the shares change hands 1.31% below the $10.05 they can be redeemed for. A holder buying here is paid that spread to carry deadline and redemption risk until the vote, and the trust keeps accreting underneath it.

  • Trust versus the $10 unit

    The trust holds $10.05 per public share, 0.5% above the $10.00 the units were sold at. That spread is accrued interest on the trust and, where the charter provides for it, sponsor contributions paid in to buy more time. It is the floor a public shareholder can redeem at, not a valuation of the business.

  • Time on the clock

    546 days to the Mar 4, 2028 deadline. The vehicle is early in its search window, and the deadline is not yet the binding constraint.

  • Sponsor promote

    The sponsor's founder block is 3,633,333 shares against 28,750,000 public shares, or 11.2% of the combined count, acquired before the IPO at nominal cost. That promote is the structural dilution every public shareholder carries into a combination, and it is why the economics of a de-SPAC differ so sharply from a conventional IPO.

  • Underwriting

    Cohen & Company led the offering. It has been named on 47 SPAC IPOs, book-running 46 of them, and 50% of its resolved vehicles closed a deal. The syndicate has no control over whether a sponsor finds a target, but the quality of the book at pricing shapes who ends up holding the units.

Scores

Recomputed 21h ago

Three readings of Keystone Acquisition Corp., each an unweighted mean of the components shown beneath it, and each component a percentile against every live SPAC rather than an absolute we invented. They describe the setup, not the merit. How they are built

FOMO

Moderate

How much attention is this vehicle attracting right now?

28/100

  • Filing activity55

    3 in 30 days

  • News coverage0

    0 stories in 30 days

Attention is not quality. FOMO rises on news volume and on the market paying above trust, both of which have preceded plenty of disappointments.

Potential

Elevated

How likely is this vehicle to complete a combination, and at what scale?

62/100

  • Trust scale84

    $289M

  • Stage40

    searching

Potential is about execution, not about the target. It says nothing about whether the eventual deal is worth owning, because the target is usually unknown when the score is computed.

These are derived measures, not ratings of investment merit. They carry no view on the target, no price target and no recommendation, and a high score is not a reason to buy anything.

SEC filing history

Free tier: filings older than 24 hours
  • 10-Q

    Quarterly report

    Accession 0001213900-26-089140

    Aug 13, 2026

    22d ago

    Open filing
  • SCHEDULE 13G

    Beneficial ownership report (passive)

    Accession 0001167557-26-000196

    Aug 13, 2026

    23d ago

    Open filing
  • SCHEDULE 13G

    Beneficial ownership report (passive)

    Accession 0001104659-26-095335

    Aug 13, 2026

    23d ago

    Open filing
  • 8-K

    Other events

    Items 8.01, 9.01 · Accession 0001213900-26-069960

    Jun 18, 2026

    2mo ago

    Open filing
  • 8-K

    Other events

    Items 8.01, 9.01 · Accession 0001213900-26-067269

    Jun 10, 2026

    2mo ago

    Open filing
  • 8-K

    Entry into a material definitive agreement; Other events

    Items 1.01, 3.02, 5.02, 5.03, 8.01, 9.01 · Accession 0001213900-26-066255

    Jun 8, 2026

    2mo ago

    Open filing
  • 424B4

    Final IPO prospectus

    Accession 0001213900-26-064746

    Jun 3, 2026

    3mo ago

    Open filing
  • EFFECT

    Notice of effectiveness

    Accession 9999999995-26-001846

    Jun 3, 2026

    3mo ago

    Open filing
  • 3

    Initial statement of beneficial ownership

    Accession 0001213900-26-064389

    Jun 3, 2026

    3mo ago

    Open filing
  • 3

    Initial statement of beneficial ownership

    Accession 0001213900-26-064388

    Jun 3, 2026

    3mo ago

    Open filing
  • 3

    Initial statement of beneficial ownership

    Accession 0001213900-26-064387

    Jun 3, 2026

    3mo ago

    Open filing
  • 3

    Initial statement of beneficial ownership

    Accession 0001213900-26-064385

    Jun 3, 2026

    3mo ago

    Open filing
  • 3

    Initial statement of beneficial ownership

    Accession 0001213900-26-064383

    Jun 3, 2026

    3mo ago

    Open filing
  • 3

    Initial statement of beneficial ownership

    Accession 0001213900-26-064382

    Jun 3, 2026

    3mo ago

    Open filing
  • CERT

    Exchange listing certification

    Accession 0001354457-26-000514

    Jun 2, 2026

    3mo ago

    Open filing
  • 8-A12B

    Registration of securities on an exchange

    Accession 0001213900-26-063817

    Jun 2, 2026

    3mo ago

    Open filing
  • CORRESP

    Correspondence with SEC staff

    Accession 0001213900-26-062648

    May 29, 2026

    3mo ago

    Open filing
  • CORRESP

    Correspondence with SEC staff

    Accession 0001213900-26-062644

    May 29, 2026

    3mo ago

    Open filing
  • S-1/A

    Amended IPO registration statement

    Accession 0001213900-26-062203

    May 28, 2026

    3mo ago

    Open filing
  • S-1

    Registration statement for the initial public offering

    Accession 0001213900-26-051706

    May 4, 2026

    4mo ago

    Open filing
  • UPLOAD

    SEC staff comment letter

    Accession 0000000000-26-001651

    Feb 18, 2026

    6mo ago

    Open filing
  • DRS

    Draft registration statement (confidential)

    Accession 0001213900-26-007200

    Jan 23, 2026

    7mo ago

    Open filing

Keystone Acquisition Corp.: questions answered

What is Keystone Acquisition Corp. (KEYY)?

Keystone Acquisition Corp. is a special purpose acquisition company incorporated in Cayman Islands and registered with the SEC under CIK 0002102771. It completed its initial public offering in Jun 2026, raising $287.5M in gross proceeds and listing on Nasdaq. Class A shares trade under the ticker KEYY, units under KEYYU, warrants under KEYYW on Nasdaq. The vehicle is sponsored by Keystone International Acquisition Management through Keystone International Acquisition Management LLC. IPO closed, trust funded, no definitive agreement announced.

How much does Keystone Acquisition Corp. hold in trust?

Approximately $288,973,581, or about $10.05 per public share, as at the most recent filing on record. Trust balances move: shareholders redeem at extension votes and at the combination vote, and sponsors pay contributions in to extend. Treat the figure as a point-in-time disclosure, not a running balance.

When must Keystone Acquisition Corp. complete a merger?

By Mar 4, 2028. If no combination closes by then the sponsor must seek a further extension or wind the vehicle up and return the trust.

What happens if Keystone Acquisition Corp. does not find a target in time?

The charter requires the vehicle to redeem 100% of the public shares and return the trust, pro rata, to public shareholders. That is the mechanism working as designed rather than a default. Founder shares and warrants are worthless in that outcome, which is why the sponsor's incentive is to get a deal done or to buy more time. Across the market, deadline lapsed without a deal; trust returned to public shareholders.

Can I redeem shares in Keystone Acquisition Corp., and at what price?

Public shareholders may elect to redeem in connection with a combination vote and at each extension vote, at the pro-rata trust value on the relevant record date, most recently disclosed at about $10.05 per share. Redemption is a right attached to the public shares only; warrants and rights carry no claim on the trust. The mechanics and the deadline for electing are set out in the proxy statement for the vote in question.

What tickers does Keystone Acquisition Corp. trade under?

Class A shares trade as KEYY on Nasdaq, the units as KEYYU, and the warrants as KEYYW. Units trade first and separate into their component securities roughly 52 days after the IPO; only the Class A shares carry the redemption right against the trust.

Is the trust value the same as the share price for Keystone Acquisition Corp.?

No, and the gap between them is the whole trade. Trust per share is a disclosed, contractual figure of $10.05, being what a redeeming holder receives. The market price is whatever the shares change hands at: most recently $9.92, a discount of 1.31% to the redemption value. Quotes on this site are delayed and indicative; confirm on your own venue before trading.

How much dilution do Keystone Acquisition Corp.'s founder shares and warrants create?

The founder block is 3,633,333 shares against 28,750,000 public shares, so roughly 11.2% of the combined count sits with the sponsor at nominal cost. Both are disclosed in the prospectus and both survive into the combined company, which is why a de-SPAC at $10 is not economically the same as an IPO at $10.

Who sponsors Keystone Acquisition Corp., and what is their track record?

Keystone International Acquisition Management LLC is the sponsor entity, part of the Keystone International Acquisition Management franchise. This is the only vehicle we have attributed to that sponsor. Named principals: Richard Chin.

Which banks underwrote the Keystone Acquisition Corp. IPO?

Cohen & Company, Clear Street. Cohen & Company was credited as book-running manager on the cover. Syndicate membership and role are read from the prospectus cover and the underwriting section.

Is Keystone Acquisition Corp. tradeable, and where?

Yes. KEYY returned a live quote of $9.92 on Nasdaq. Quotes here are delayed and refreshed on a schedule rather than streamed, so treat the figure as indicative and confirm on your own venue. Units and warrants trade under their own symbols and are quoted separately.

Is Keystone Acquisition Corp. a good investment?

That is not a question this site answers. Keystone Acquisition Corp. is covered here as reference data: what the company filed, when it filed it, and what the numbers in those filings say. The Edge, FOMO and Potential scores on this page are derived measures with a published formula, not ratings of investment merit: they describe the setup, and every component is shown so you can take them apart. We publish no price targets and no recommendations, and nothing here should be read as advice. The figures are a starting point for your own work, and each one carries the accession number of the filing it came from.

Where does this Keystone Acquisition Corp. data come from?

Filings Keystone Acquisition Corp. submitted to the SEC under CIK 0002102771: the registration statement and final prospectus for the structure, quarterly and annual reports for the trust, current reports and proxy statements for deals, votes and extensions. Trust economics are taken from the registrant's own XBRL tags rather than parsed from prose, which is why they are exact. Every filing in the history above is listed with its accession number, which identifies the document uniquely on EDGAR; Pro accounts open it directly from the row.

Compiled by the SPACListing research desk

Last reconciled Sep 5, 2026

Every figure on this page is read from documents the registrants filed with the U.S. Securities and Exchange Commission, principally the IPO prospectus (Form 424B4), quarterly and annual reports, current reports and proxy statements, the registrant's own XBRL tags for trust economics. Nothing is sourced from press coverage, from the companies themselves, or from a third-party aggregator. Where a filing does not disclose something, the field is left blank rather than estimated.

Read the full methodology · What is in the dataset · Report a correction

SPACListing is a reference-data service, not an investment adviser. Nothing here is a recommendation to buy or sell any security.

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The context around this vehicle: who else the sponsor has launched, which banks priced it, and where it sits in the wider market.