Keystone Acquisition (KEYYU) CEO submits initial Form 3 ownership filing

Rhea-AI Filing Summary

Keystone Acquisition Corp. Chief Executive Officer Richard H. Chin has filed an initial Form 3, which is the required statement of beneficial ownership for company insiders. The filing identifies him as an officer but, in the provided data, shows no reported transactions or derivative positions.

Key Figures

Reporting persons: 1

1 metrics

Reporting persons 1 Form 3 filer count for Keystone Acquisition Corp.

Key Terms

Form 3, Chief Executive Officer, reporting person

3 terms

Form 3 regulatory

"initial Form 3, which is the required statement of beneficial ownership"

Form 3 is the initial public filing that officers, directors and large shareholders must submit to report their ownership of a company’s securities when they become insiders. It acts like an opening inventory sheet that gives investors a starting point to see who holds significant stakes and to spot later trades or potential conflicts of interest, helping assess insider confidence and transparency.

Chief Executive Officer financial

"The reporting person, Richard H. Chin, is identified as Chief Executive Officer"

A chief executive officer (CEO) is the top leader of a company, responsible for making major decisions, setting goals, and guiding the organization’s overall direction. Think of the CEO as the captain of a ship, steering it toward success. Investors pay close attention to the CEO because their leadership and strategy can significantly influence the company's performance and future growth.

reporting person regulatory

"The Form 3 shows Richard H. Chin as Chief Executive Officer and a reporting person"

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SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0104
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

Chin Richard H.

(Last) (First) (Middle)

C/O KEYSTONE ACQUISITION CORP.

142 WEST 57TH STREET, 11TH FLOOR

(Street)

NEW YORK NEW YORK 10019

(City) (State) (Zip)

UNITED STATES

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
06/02/2026

3. Issuer Name and Ticker or Trading Symbol
Keystone Acquisition Corp. [ KEYY ]

3a. Foreign Trading Symbol

5. If Amendment, Date of Original Filed (Month/Day/Year)

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Executive Officer

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

Remarks:

See Exhibit 24.1 - Power of Attorney.

No securities are beneficially owned.

	/s/ Claudia Hanover, Attorney-in-Fact	06/02/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 3: SEC 1473 (03-26)

FAQ

What does Richard H. Chin's Form 3 filing for KEYYU indicate?

The Form 3 shows Richard H. Chin as Chief Executive Officer and a reporting person of Keystone Acquisition Corp. It is an initial statement of beneficial ownership and, in this excerpt, does not list any transactions or derivative positions.

Does the KEYYU Form 3 for Richard H. Chin report any share transactions?

No transactions are reported in the provided Form 3 data. The transaction summary shows zero buys, sells, derivative exercises, gifts, tax withholdings, and restructurings, indicating this filing serves as a baseline ownership statement without reported trades.

What role does the reporting person hold at Keystone Acquisition Corp. (KEYYU)?

The reporting person, Richard H. Chin, is identified as Chief Executive Officer of Keystone Acquisition Corp. This officer status makes him a reporting person required to file ownership reports such as Form 3 with the SEC.

Are any derivative securities disclosed in Richard H. Chin's KEYYU Form 3?

No derivative securities are disclosed in the provided excerpt. The derivativeSummary is empty and the derivativeTransactionCount is zero, indicating no options, warrants, or similar instruments are reported in this particular Form 3 snapshot.

How many reporting persons are included in this KEYYU Form 3 filing?

This Form 3 includes a single reporting person, Richard H. Chin. The filing associates him with Keystone Acquisition Corp. and identifies his position and reporting status without listing additional insiders within the provided data.