Quantumsphere Acquisition Corp — Director's Dealing 2025

Aug 11, 2025

SEC Form 3 — Initial Statement of Beneficial Ownership

Issuer: Quantumsphere Acquisition Corp (QUMSU)
CIK: 0002070900
Period of Report: 2025-08-05

Reporting Person: Zhang Ping (Director, Chairman, CEO, and CFO)

Holdings (Non-Derivative)

Security	Shares	Ownership
Ordinary Shares, par value $0.0001 per share	3126650	Indirect

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Rights	$		Ordinary Shares (32664)		Indirect

Footnotes

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.

F3: Whiteowl Holdings LLC, a Delaware limited liability company, is the record holder of the securities reported herein, which is controlled by Ping Zhang.