Whiteowl Holdings LLC - Aug 5, 2025 Form 3 Insider Report for Quantumsphere Acquisition Corp (QUMSU)

Role: 10%+ Owner
Signature: /s/ Ping Zhang, Managing Member of Whiteowl Holdings LLC
Stock symbol: QUMSU
Transactions as of: Aug 5, 2025
Transactions value $: $0
Form type: 3
Date filed: 8/11/2025, 07:01 PM
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Whiteowl Holdings LLC	10%+ Owner	WHITEOWL HOLDINGS LLC 1201, ORANGE STREET, SUITE 600, WILMINGTON, DELAWARE	/s/ Ping Zhang, Managing Member of Whiteowl Holdings LLC	2025-08-11	0002068027

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
holding	QUMSU	Ordinary Shares, par value $0.0001 per share						3.13M	Aug 5, 2025	Direct	F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
holding	QUMSU	Rights							Aug 5, 2025	Ordinary Shares	32.7K		Direct	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Includes 2,898,000 ordinary shares of the Issuer acquired by Whiteowl Holdings LLC prior to the Issuer 's initial public offering. As a result of the underwriter's full exercise of its over-allotment option to purchase 1,080,000 units on August 7, 2025, no such shares are subject to forfeiture. Also includes 228,650 ordinary shares underlying the private placement units sold in a private placement conducted simultaneously with the Issuer 's initial public offering.
F2	Includes 228,650 rights underlying the private placement units, which were sold in a private placement taking place simultaneously with the Issuer 's initial public offering. Each right is exchangeable for one-seventh of one ordinary share upon the completion of the Issuer 's initial business combination.

Content

Includes 2,898,000 ordinary shares of the Issuer acquired by Whiteowl Holdings LLC prior to the Issuer 's initial public offering. As a result of the underwriter's full exercise of its over-allotment option to purchase 1,080,000 units on August 7, 2025, no such shares are subject to forfeiture. Also includes 228,650 ordinary shares underlying the private placement units sold in a private placement conducted simultaneously with the Issuer 's initial public offering.

Includes 228,650 rights underlying the private placement units, which were sold in a private placement taking place simultaneously with the Issuer 's initial public offering. Each right is exchangeable for one-seventh of one ordinary share upon the completion of the Issuer 's initial business combination.