Horizon Quantum Holdings Ltd.

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

Beneficial ownership report for a holder of more than 5% (Schedule 13D)

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G)

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

Prospectus Supplement for Primary Offering

Notice of Effectiveness

Correspondence with the SEC

No description available

Letter from the SEC

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

Registration statement for securities of certain foreign private issuers

Registration statement / Annual report / Transition report for Foreign Private Issuers

Post-effective amendment to a registration statement

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

Beneficial ownership report for a holder of more than 5% (Schedule 13D)

Beneficial ownership report for a holder of more than 5% (Schedule 13D)

Registration statement / Annual report / Transition report for Foreign Private Issuers

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G)

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

Registration of Securities on Exchange

Certification of approval for listing and registration on a national securities exchange

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Draft registration statement (confidential submission)

Chew Qian Yi Amanda

Gould Greg

Fitzsimons Joseph Francis

Tan Si-Hui

Fitzsimons Catherine Michele

Chew Qian Yi Amanda

Fitzsimons Catherine Michele

Turner Jill Ann

Gould Greg

Tan Si-Hui

Lambert Danielle

Fitzsimons Joseph Francis

You Harry L.

You Harry L.