# Horizon Quantum Computing Pte. Ltd. — merger/spac_merger [pending]
Source: SEC API (secapi.ai) · situation sit_466277266805ca0132a7 · retrieved 2026-08-11T16:11:57.418Z

## Overview
Horizon Quantum develops quantum software infrastructure and programming tools, including its Triple Alpha integrated development environment, enabling developers to write hardware-agnostic quantum programs across multiple quantum computing platforms.

dMY Squared Technology Group, Inc., a blank-check company, is merging with Horizon Quantum Computing Ltd. and Horizon Quantum Holdings Ltd. in a business combination announced on September 9, 2025. Horizon Quantum, founded in 2018 by Dr. Joseph Fitzsimons, is a quantum software company developing programming tools and an operating system layer for quantum computing. The company is being valued at $500 million on a pre-money basis before the capital infusion from the SPAC merger. The PIPE (private placement) has raised over $110 million (approximately $111.9 million), and the combined entity will trade under the ticker symbol HQ following closing. The Registration Statement became effective on February 17, 2026, and a definitive proxy statement was filed the same day.

## Terms
- Counterparty: Horizon Quantum Computing Ltd. and Horizon Quantum Holdings Ltd. · Deal value: $500.0M · Consideration: mixed

## Key dates
- Announced 2026-03-10

## Timeline
- 2026-03-10 · 425 (0001213900-26-025527): 425 - Horizon Quantum Computing Pte. Ltd. — *Horizon Quantum Computing develops quantum software infrastructure and development tools, including its integrated development environment Triple Alpha, to enable developers to write hardware-agnostic quantum programs.* Horizon Quantum Computing Pte. Ltd. announced a business combination with dMY Squared Technology Group, Inc., a blank-check company. The transaction includes a private placement (PIPE) of approximately $111.9 million of Horizon Quantum's Class A ordinary shares with institutional and accredited investors. A registration statement on Form F-4 became effective on February 17, 2026, and dMY filed a definitive proxy statement/prospectus the same day for shareholder voting on the business combination.
  https://www.sec.gov/Archives/edgar/data/2088257/0001213900-26-025527.txt
- 2026-03-10 · 425 (0001213900-26-025451): 425 - Horizon Quantum Computing Pte. Ltd. — *Horizon Quantum Computing develops quantum software infrastructure and development tools, including its integrated development environment Triple Alpha, to enable developers to write hardware-agnostic quantum programs and solve complex computational problems.* Horizon Quantum Computing Pte. Ltd. and Horizon Quantum Holdings Pte. Ltd. announced a previously disclosed business combination with dMY Squared Technology Group, Inc. (a blank-check company). A Form F-4 registration statement became effective on February 17, 2026, and dMY mailed a definitive proxy statement/prospectus to shareholders on the same date for a special meeting vote on the business combination. The transaction includes a private placement (PIPE) of approximately $111.9 million of Horizon Quantum's Class A ordinary shares with institutional and accredited investors, qualified institutional buyers, and strategic investors. The business combination agreement is dated September 9, 2025.
  https://www.sec.gov/Archives/edgar/data/2088257/0001213900-26-025451.txt
- 2026-03-11 · 425 (0001213900-26-026235): 425 - Horizon Quantum Computing Pte. Ltd. — *Horizon Quantum develops quantum software infrastructure and programming tools, including its Triple Alpha integrated development environment, enabling developers to write hardware-agnostic quantum programs across multiple quantum computing platforms.* dMY Squared Technology Group, Inc., a blank-check company, is merging with Horizon Quantum Computing Ltd. and Horizon Quantum Holdings Ltd. in a business combination announced on September 9, 2025. Horizon Quantum, founded in 2018 by Dr. Joseph Fitzsimons, is a quantum software company developing programming tools and an operating system layer for quantum computing. The company is being valued at $500 million on a pre-money basis before the capital infusion from the SPAC merger. The PIPE (private placement) has raised over $110 million (approximately $111.9 million), and the combined entity will trade under the ticker symbol HQ following closing. The Registration Statement became effective on February 17, 2026, and a definitive proxy statement was filed the same day.
  https://www.sec.gov/Archives/edgar/data/2088257/0001213900-26-026235.txt

## Citations
- 0001213900-26-025527 — https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&type=&dateb=&owner=include&count=40&search_text=000121390026025527
- 0001213900-26-025451 — https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&type=&dateb=&owner=include&count=40&search_text=000121390026025451
- 0001213900-26-026235 — https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&type=&dateb=&owner=include&count=40&search_text=000121390026026235