Rocket EMS, a South Bay electronics manufacturer, has scooped up a foreclosed office and research building in South San Jose for just under $18.8 million, according to county filings and commercial records. The one-story property at 5729 Fontanoso Way has been largely empty since a loan default and bankruptcy, and the deal shifts roughly 78,000 square feet of flex and R&D space into the hands of a local hardware producer at a steep markdown from its prior valuation.
Documents filed Wednesday with the Santa Clara County Recorder's Office show Rocket EMS paid just under $18.8 million, roughly 23.5% below the building's foreclosure valuation of $24.5 million, after the lender seized the property. Records list Evergreen Advantage as the seller and confirm the transfer was recorded with the county, as reported by The Mercury News.
What Rocket EMS Bought
The single-story flex and R&D building totals about 78,200 square feet on roughly five acres along Monterey Road, according to property listings. High-capacity electrical service and dock-high loading make the site suitable for advanced manufacturing, per a commercial listing on LoopNet.
Biotech firm Khloris Biosciences signed a lease for the Fontanoso building in 2021 but is reported to have never actually moved in. Khloris still lists the address on its website, and details on the company’s fundraising appear on Crunchbase.
Who Is Rocket EMS?
Rocket EMS is a Santa Clara-based electronics manufacturing services company that focuses on printed-circuit board assembly, quick-turn production, and box builds. The firm lists a Santa Clara headquarters and a Carson City, Nevada facility on its corporate site and promotes itself as a New Product Introduction partner for startups and OEMs, according to Rocket EMS. Founded in 2011, the company leans heavily on rapid-turn, high-reliability manufacturing.
Why This Deal Matters
The sale highlights a broader shift in the South Bay, where older office and lab buildings are trading at discounts and getting snapped up by industrial and advanced-manufacturing users looking for power and infrastructure rather than cubicles.
Colliers' Q1 2026 San Jose-Silicon Valley research notes that R&D and office space is in transition, with occupancy losses in older product even as demand grows for modern, power-ready facilities. That split helps explain why a circuit-board maker would zero in on a flex building like this, according to Colliers.
As of the recording of the sale on Wednesday, there were no immediate public plans announced for what Rocket EMS will do with the Fontanoso site. For now, the deal closes out a foreclosure chapter for the property and adds one more example of local manufacturers spreading into larger, infrastructure-ready space.
