Silicon Box, a Singapore-based semiconductor design and device integration services startup, has announced raising S$100 million (about $78 million) in debt financing from institutional investors.
The financing comes from funds managed by Ares Management, InnoVen Capital, January Capital Growth Credit, and Abound Capital. Silicon Box said the facility includes an option to increase by another $75 million.
The company did not disclose the detailed terms of the debt facility.
The fundraising comes just a month after the advanced semiconductor packaging company completed a $150 million Series B2 equity round backed by new and existing investors.
The company also raised $200 million in Series B funding in January 2024. It secured $208 million across its seed, Series A, and Simple Agreement for Future Equity (SAFE) funding rounds.
Silicon Box was founded by semiconductor veterans Han, Sehat Sutardja, and Weili Dai. It emerged from stealth in 2021 and claimed unicorn status in late 2023.
Silicon Box top shareholders
The company gained attention for its large-scale chiplet packaging, a technology that combines multiple small chips into a single high-performance package.
A chiplet is one part of a processing module that makes up a larger integrated circuit, like a computer processor. The chiplet architecture allows chip designers to be free from the constraints of a single, monolithic chip for processing.
The debt proceeds will primarily be used to expand production capacity to meet rising customer demand, said co-founder and CEO BJ Han.
He added that the financing would strengthen the company’s capital base while limiting shareholder dilution.
“In capital-intensive industries like semiconductor manufacturing, access to flexible and scalable funding is critical to capturing growth opportunities,” Han said.
Silicon Box intends to scale manufacturing capacity and support customers across sectors, including artificial intelligence, high-performance computing, mobile devices, the Internet of Things, robotics, and space technology.
According to its press release in July 2025, Silicon Box reported a revenue of $1.87 million in the first year of production at its Singapore factory in 2024 from pre-qualified customers’ production and R&D investments from major customers.
Ares Management partner Dinesh Goel said Silicon Box operates in the strategically important advanced packaging segment as chipmakers increasingly adopt chiplet architectures.
“We believe that Silicon Box is well-positioned to scale globally, and this financing reflects our confidence in the management team and the long-term growth outlook for advanced packaging,” Goel said.
Ares had more than $644 billion in assets under management as of March 31, 2026.
