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Keystone Acquisition (KEYYU) sets June 22 start for unit, warrant split

Filing Impact
(Very High)
Filing Sentiment
(Neutral)
Form Type
8-K

Rhea-AI Filing Summary

Keystone Acquisition Corp. announced that holders of its units from the initial public offering of 28,750,000 units may begin separately trading the Class A ordinary shares and warrants on or about June 22, 2026. Each unit consists of one Class A ordinary share and one-half of one redeemable warrant.

The units will continue to trade on Nasdaq under "KEYYU," while the shares and warrants will trade separately under "KEYY" and "KEYYW." No fractional warrants will be issued, and only whole warrants with an exercise price of $11.50 per share will trade. Holders must instruct their brokers to contact the transfer agent, Efficiency INC., to separate units.

Positive

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Negative

  • None.
Item 8.01 Other Events Other
Voluntary disclosure of events the company deems important to shareholders but not covered by other items.
Item 9.01 Financial Statements and Exhibits Exhibits
Financial statements, pro forma financial information, and exhibit attachments filed with this report.
IPO units sold 28,750,000 units Initial public offering completed on June 4, 2026
Overallotment units 3,750,000 units Issued pursuant to underwriters’ overallotment option
Warrant exercise price $11.50 per share Each whole warrant exercisable for one Class A ordinary share
Par value per Class A share $0.0001 per share Class A ordinary shares included in units
Unit trading start for separation June 22, 2026 Date separate trading of shares and warrants may commence
blank check company financial
"Keystone Acquisition Corp. is a blank check company formed for the purpose of effecting a merger"
A blank check company is a publicly listed shell that raises money from investors before naming a specific business to buy or merge with, similar to handing a cashier a signed check and asking them to fill in the payee later. It matters to investors because it offers a faster, often cheaper path for private firms to become public, but carries extra risk since returns depend on the organizers’ ability to find a good deal and on limited information about the future business.
initial public offering financial
"holders of the units sold in the Company’s initial public offering of 28,750,000 units"
An initial public offering (IPO) is when a private company first sells its shares to the public and becomes a stock-listed company. It matters because it allows the company to raise money from a wide range of investors, helping it grow, while giving early shareholders a way to sell some of their ownership.
overallotment option financial
"which includes 3,750,000 units issued pursuant to the exercise by the underwriters of their overallotment option in full"
An overallotment option (often called a "greenshoe") is a pre-arranged allowance for underwriters to sell or buy up to a specified extra percentage of a company’s shares during an offering to meet unexpected demand or support the share price. Think of it as a short-term buffer: it helps reduce wild swings right after shares start trading but can slightly increase the total shares outstanding if the option is exercised, which matters to investors because it affects supply, price stability, and potential dilution.
forward-looking statements regulatory
"This press release contains statements that constitute “forward-looking statements,” including with respect to the Company’s search"
Forward-looking statements are predictions or plans that companies share about what they expect to happen in the future, like estimating sales or profits. They matter because they help investors understand a company's outlook, but since they are based on guesses and assumptions, they can sometimes be wrong.
initial business combination financial
"including with respect to the Company’s search for an initial business combination"
An initial business combination is the deal in which a special-purpose acquisition company (SPAC) merges with or acquires an operating business to bring that business onto public markets. Think of the SPAC as an empty shell that raises money from investors, then uses that cash to buy a private company—this transaction turns the private company into a public one and often changes its ownership, valuation, and access to capital, so investors should watch for shifts in risk, future growth prospects, and shareholder rights.
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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

 

FORM 8-K

 

CURRENT REPORT

 

PURSUANT TO SECTION 13 OR 15(d) OF THE
SECURITIES EXCHANGE ACT OF 1934

 

Date of Report (Date of earliest event reported): June 18, 2026

 

KEYSTONE ACQUISITION CORP. 

(Exact name of registrant as specified in its charter)

 

Cayman Islands   001-43320   N/A
(State or other jurisdiction
of incorporation)
  (Commission File Number)   (IRS Employer
Identification No.)

 

142 West 57th Street

11th Floor

New YorkNew York 10019

(Address of principal executive offices, including zip code)

 

Registrant’s telephone number, including area code: (408) 482-7532

 

Not Applicable
(Former name or former address, if changed since last report)

 

Securities registered pursuant to Section 12(b) of the Act:

 

Title of each class   Trading Symbol(s)   Name of each exchange on which registered
Units, each consisting of one Class A ordinary share, $0.0001 par value, and one-half of one redeemable warrant   KEYYU   The Nasdaq Stock Market LLC
Class A ordinary shares, par value $0.0001 per share   KEYY   The Nasdaq Stock Market LLC
Warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50 per share   KEYYW   The Nasdaq Stock Market LLC

 

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

 

Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
   
Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
   
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
   
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

 

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

 

Emerging growth company

 

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.

 

 

 

 

 

 

Item 8.01. Other Events.

 

On June 18, 2026, Keystone Acquisition Corp. (the “Company”) issued a press release, a copy of which is attached as Exhibit 99.1 to this Current Report on Form 8-K, announcing that the holders of the Company’s units (the “Units”) may elect to separately trade the Class A ordinary shares, par value $0.0001 per share (the “Class A Ordinary Shares”), and warrants (the “Warrants”) included in the Units commencing on or about June 22, 2026. Each Unit consists of one Class A Ordinary Share and one-half of one redeemable Warrant to purchase one Class A Ordinary Share. Any Units not separated will continue to trade on The Nasdaq Global Market under the symbol “KEYYU”, and the Class A Ordinary Shares and Warrants will separately trade on The Nasdaq Global Market under the symbols “KEYY” and “KEYYW,” respectively. No fractional Warrants will be issued upon separation of the Units and only whole Warrants will trade. Holders of Units will need to have their brokers contact Efficiency INC., the Company’s transfer agent, in order to separate the Units into Class A Ordinary Shares and Warrants.

 

Item 9.01 Financial Statements and Exhibits.

 

(d) Exhibits

 

EXHIBIT INDEX

 

Exhibit No.   Description
99.1   Press Release, dated June 18, 2026
104   Cover Page Interactive Data File (embedded within the Inline XBRL document).

 

1

 

 

SIGNATURE

 

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

 

  KEYSTONE ACQUISITION CORP.
       
  By: /s/ Richard Chin
    Name: Richard Chin
    Title: Chief Executive Officer
       
Dated: June 18, 2026      

 

2

 

Exhibit 99.1

 

Keystone Acquisition Corp. Announces the Separate Trading of its Class A Ordinary Shares and Warrants, Commencing on or about June 22, 2026.

 

New York, New York, June 18, 2026 (GLOBE NEWSWIRE) -- Keystone Acquisition Corp. (Nasdaq: KEYYU) (the “Company”) announced that holders of the units sold in the Company’s initial public offering of 28,750,000 units, which includes 3,750,000 units issued pursuant to the exercise by the underwriters of their overallotment option in full, completed on June 4, 2026 (the “Offering”), may elect to separately trade the Class A ordinary shares and warrants included in the units commencing on or about June 22, 2026. Any units not separated will continue to trade on The Nasdaq Global Market under the symbol “KEYYU,” and each of the Class A ordinary shares and warrants will separately trade on The Nasdaq Global Market under the symbols “KEYY” and “KEYYW,” respectively. No fractional warrants will be issued upon separation of the units and only whole warrants will trade. Holders of units will need to have their brokers contact Efficiency INC., the Company’s transfer agent, in order to separate the units into Class A ordinary shares and warrants.

 

A registration statement relating to these securities has become effective pursuant to Section 8(a) of the Securities Act of 1933, as amended. This press release shall not constitute an offer to sell or the solicitation of an offer to buy, nor shall there be any sale of these securities in any state or jurisdiction in which such offer, solicitation, or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction.

 

Cautionary Note Concerning Forward-Looking Statements

 

This press release contains statements that constitute “forward-looking statements,” including with respect to the Company’s search for an initial business combination. Forward-looking statements are subject to numerous conditions, many of which are beyond the control of the Company, including those set forth in the Risk Factors section of the Company’s registration statement for the initial public offering filed with the SEC. Copies are available on the SEC’s website, www.sec.gov. The Company undertakes no obligation to update these statements for revisions or changes after the date of this release, except as required by law.

 

About Keystone Acquisition Corp.

 

Keystone Acquisition Corp. is a blank check company formed for the purpose of effecting a merger, share exchange, asset acquisition, share purchase, reorganization, or similar business combination with one or more businesses. While the Company may pursue an initial business combination in any sector or geographic region, it intends initially to focus on opportunities and 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.

 

Contact

 

Jake Cho
Chief Financial Officer
Keystone Acquisition Corp.
jake.cho@kystinter.com

 

FAQ

What did Keystone Acquisition Corp. (KEYYU) announce in this 8-K filing?

Keystone Acquisition Corp. announced that holders of its IPO units may separately trade the Class A ordinary shares and warrants beginning around June 22, 2026. Units remain listed as KEYYU, while shares trade as KEYY and warrants as KEYYW on Nasdaq.

When can Keystone Acquisition Corp. (KEYYU) unit holders start separate trading?

Separate trading of Keystone Acquisition Corp.’s Class A ordinary shares and warrants may begin on or about June 22, 2026. Until then, investors can continue trading the combined units under ticker KEYYU on The Nasdaq Global Market as a single security.

How many Keystone Acquisition Corp. (KEYYU) units were sold in the IPO?

Keystone Acquisition Corp.’s initial public offering comprised 28,750,000 units, including 3,750,000 units issued under the underwriters’ overallotment option. Each unit contains one Class A ordinary share and one-half of one redeemable warrant to purchase an additional Class A ordinary share.

What is the exercise price of Keystone Acquisition Corp. (KEYYU) warrants?

Each whole Keystone Acquisition Corp. warrant is exercisable for one Class A ordinary share at an exercise price of $11.50 per share. No fractional warrants will be issued, and only whole warrants will trade separately under ticker KEYYW on The Nasdaq Global Market.

How can KEYYU unit holders separate shares and warrants for Keystone Acquisition Corp.?

Holders of Keystone Acquisition Corp. units must instruct their brokers to contact Efficiency INC., the company’s transfer agent, to separate units into Class A ordinary shares and warrants. Once separated, the units, shares, and warrants will trade under KEYYU, KEYY, and KEYYW, respectively.

What type of company is Keystone Acquisition Corp. (KEYYU)?

Keystone Acquisition Corp. is a blank check company formed to complete a business combination such as a merger or share exchange. It intends to focus on high-growth U.S. industrial innovation sectors, including energy transition, shipbuilding, semiconductors, digital infrastructure, and digital assets.

Filing Exhibits & Attachments

5 documents