Grab CFO Peter Oey joins Horizon Quantum (HQ) board, to chair audit panel

Rhea-AI Filing Summary

Horizon Quantum Holdings Ltd. reported that on April 29, 2026, Peter Oey was appointed to its Board of Directors. He will serve as chairman of the audit committee and a member of the compensation committee, strengthening the company’s financial oversight and governance structure.

Harry You will remain on the audit committee, while Danielle Lambert, who chairs the nominating & corporate governance committee, will step down from the audit and compensation committees. The company highlights Mr. Oey’s extensive experience as Chief Financial Officer of Grab Holdings Ltd. and prior senior finance roles as the basis for his selection.

Insights

Corporate governance analyst

Horizon Quantum adds an experienced CFO to its board committees, modestly enhancing governance.

The appointment of Peter Oey, currently Chief Financial Officer of Grab Holdings Ltd., to the board and as audit committee chair brings deep public-company finance and compliance experience to Horizon Quantum’s oversight functions.

Committee changes keep continuity by retaining Harry You on the audit committee while rotating Danielle Lambert off the audit and compensation committees. This looks like a routine refresh that aligns committee leadership with Mr. Oey’s financial and Sarbanes-Oxley background.

Key Terms

Board of Directors, audit committee, compensation committee, nominating & corporate governance committee, +1 more

5 terms

Board of Directors financial

"Mr. Peter Oey was appointed to the Board of Directors"

The Board of Directors is a group of people chosen by a company's owners to help make big decisions and oversee how the company is run. They act like a team of advisors or managers, making sure the company stays on track and meets its goals. Their choices can influence the company's success and how it grows.

audit committee financial

"Mr. Oey will serve as chairman of the audit committee"

A company's audit committee is a small group of board members who act like independent inspectors for the firm's finances, overseeing how financial reports are prepared, monitoring internal controls, and managing the relationship with external auditors. Investors care because a strong audit committee reduces the risk of accounting errors, fraud, or misleading statements, making financial statements more trustworthy and helping protect shareholder value.

compensation committee financial

"and as a member of the compensation committee"

A compensation committee is a group within a company's leadership responsible for setting and reviewing how much top executives and employees are paid, including salaries, bonuses, and benefits. It matters to investors because fair and effective pay decisions can influence a company's performance, leadership motivation, and overall governance, helping ensure that the company’s management is aligned with shareholders’ interests.

nominating & corporate governance committee financial

"chairperson of the nominating & corporate governance committee"

Sarbanes-Oxley Act compliance regulatory

"Mr. Oey actively leads Grab’s financial operations ... Sarbanes-Oxley Act compliance"

Form 6-K: How Foreign Companies Report to the SEC →

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16

OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of May 2026

Commission File Number: 001-43203

Horizon Quantum Holdings Ltd.

(Exact name of registrant as specified in its charter)

29 Media Cir., #05-22

Singapore, 138565

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F ☒ Form 40-F ☐

On April 29, 2026, Mr. Peter Oey was appointed to the Board of Directors (the “Board”) of Horizon Quantum Holdings Ltd. (the “Company”). Mr. Oey will serve as chairman of the audit committee (the “Audit Committee”) and as a member of the compensation committee (the “Compensation Committee”) of the Board. Harry You will remain on the Audit Committee as a member. With Mr. Oey’s appointment, Danielle Lambert, who serves as the chairperson of the nominating & corporate governance committee of the Board, will step down as a member of the Audit and Compensation Committees.

Peter Oey

Mr. Oey serves as Chief Financial Officer of Grab Holdings, Ltd. (“Grab”), a position he has held since April 2020. Mr. Oey actively leads Grab’s financial operations, corporate accounting and reporting, treasury, financial planning and analysis, investor relations, tax, Sarbanes-Oxley Act compliance and procurement efforts. Additionally, Mr. Oey oversees Grab’s legal and corporate finance functions. Prior to joining Grab, Mr. Oey served as Chief Financial Officer of LegalZoom.com, Inc., a platform of online legal solutions for small businesses and individuals, a position he held from December 2014 to April 2020. In addition, between March 2012 and November 2014, Mr. Oey served as Chief Financial Officer of Mylife.com, a U.S. consumer internet business. Prior to Mylife.com, between December 1996 and March 2012, Mr. Oey served in various capacities at Activision Blizzard, Inc., ultimately achieving the title of Vice President and Corporate Controller. Mr. Oey is a fellow certified practicing accountant registered in Australia and a member of the Institute of Singapore Chartered Accountants. Mr. Oey was selected to serve on the Company’s board of directors because of his broad financial leadership experience and expertise.

1

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	Horizon Quantum Holdings Ltd.
	By:	/s/ Joseph Fitzsimons
	Name:	Joseph Fitzsimons
	Title:	Chief Executive Officer and Chairman

Date: May 4, 2026

2

FAQ

What did Horizon Quantum Holdings Ltd. (HQ) announce in this Form 6-K?

Horizon Quantum Holdings announced the appointment of Peter Oey to its Board of Directors. He will chair the audit committee and join the compensation committee, while existing director Harry You remains on the audit committee and Danielle Lambert steps down from audit and compensation roles.

Who is Peter Oey, the new director of Horizon Quantum Holdings (HQ)?

Peter Oey is the Chief Financial Officer of Grab Holdings Ltd., a role he has held since April 2020. He previously served as CFO of LegalZoom.com, Inc. and Mylife.com and held senior finance roles at Activision Blizzard, bringing extensive financial leadership experience to Horizon Quantum’s board.

What committee roles will Peter Oey hold at Horizon Quantum (HQ)?

Peter Oey will serve as chairman of the audit committee and as a member of the compensation committee of Horizon Quantum’s Board. These positions place him at the center of the company’s financial reporting oversight and executive pay decisions, reflecting his significant finance and compliance background.

How do board committees change at Horizon Quantum (HQ) with this appointment?

With Peter Oey’s appointment, Harry You remains a member of the audit committee, while Danielle Lambert will step down from both the audit and compensation committees. Lambert continues as chairperson of the nominating and corporate governance committee, indicating a rebalancing of committee responsibilities rather than a broad board reshuffle.

Why was Peter Oey selected for the Horizon Quantum (HQ) board?

The company states that Peter Oey was selected because of his broad financial leadership experience and expertise. His track record as CFO at Grab, LegalZoom.com, and Mylife.com, plus senior roles at Activision Blizzard, supports Horizon Quantum’s focus on strong financial governance and oversight capabilities.