Welcome to our dedicated page for QUANTUMSPHERE ACQUISITION CO SEC filings (Ticker: QUMSU), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
The SEC filings page for Quantumsphere Acquisition Corporation (QUMSU) provides access to the company’s regulatory disclosures as a Nasdaq‑listed special purpose acquisition company. Quantumsphere is a Cayman Islands exempted blank check company formed to complete a business combination with one or more businesses, and its filings reflect both its SPAC structure and its transaction activity.
Key documents include current reports on Form 8‑K, such as the filing describing the commencement of separate trading for its units, ordinary shares, and rights on the Nasdaq Global Market. That 8‑K details the listing of units under QUMSU and the expected trading of ordinary shares and rights under QUMS and QUMSR, along with instructions for holders who wish to separate their units.
As Quantumsphere pursues a proposed business combination with SACH Pte. Ltd. and related entities, additional filings are expected to include a registration statement on Form F‑4 containing a proxy statement/prospectus for Quantumsphere shareholders. These materials are intended to describe the transaction structure, the parties involved, and the risks associated with the merger, and they form the basis for shareholder voting on the business combination.
On Stock Titan, Quantumsphere’s SEC filings are updated in step with the EDGAR system and are accompanied by AI‑generated summaries that explain the purpose and key points of each document. Users can review 8‑K current reports, registration statements, and other submissions to understand developments such as security listings, transaction announcements, and governance matters, without having to parse every technical detail themselves.
Form 3 filed for Quantumsphere Acquisition Corp (QUMSU) by Wei Zhang reporting relationship as Director. The event date triggering the filing is 08/05/2025. The form states that no securities are beneficially owned by the reporting person. The filing was signed on 08/11/2025 and was submitted as an initial statement under Section 16.
Quantumsphere Acquisition Corp. (QUMSU) Form 3 shows that director Gong Qi filed an initial beneficial ownership report related to an 08/05/2025 event and certified on 08/11/2025. The filing states no securities are beneficially owned by the reporting person. This document is a standard Section 16 disclosure that confirms the director currently holds no direct or indirect equity or derivative positions in the issuer.
Ping Zhang filed an initial Form 3 reporting indirect beneficial ownership of 3,126,650 ordinary shares of Quantumsphere Acquisition Corp (ticker QUMSU) through Whiteowl Holdings LLC, which Ping Zhang controls. The filing states 2,898,000 shares were acquired by Whiteowl before the issuer's IPO and an additional 228,650 ordinary shares are underlying private placement units. The report also discloses 228,650 rights, each exchangeable for one-seventh of one ordinary share, representing 32,664 underlying shares. All holdings are described as indirect and the reporting person serves as Chairman, CEO and CFO and as a Director.