Temporal Technologies led the week's funding activity, securing $550 million in a Series E round. This investment values the Bellevue-based AI infrastructure developer at $12,55 billion. The round was led by Lightspeed, Wellington Management, Goldman Sachs Alternatives, and Tiger Global.
Impulse Space raised $308 million in a Series D extension, bringing its total round funding to $808 million. Meanwhile, the investment management platform Ridgeline closed a $250 million Series E round, achieving a valuation of $1,45 billion under the leadership of Dave Duffield.
The networking firm Cornelis Networks secured $205 million, while Factory, an AI software development tools provider, raised $200 million at a $5 billion valuation. Profound, an AI marketing startup, also completed a $180 million Series D round, resulting in a $1,8 billion valuation.
Arcee AI and Nex both raised $150 million. Arcee AI reached a valuation exceeding $1 billion, while Nex secured its funding through a mix of equity and debt. Additionally, Mazama Energy raised $135 million, and Sling Therapeutics closed a $123 million Series C round.
Crusoe, a data center developer, officially confirmed a previously reported funding round exceeding $3 billion. This investment was co-led by Atreides Management, Valor Equity Partners, and Mubadala Capital. The data reflects activity among U.S.-based startups from September 12 to 18, 2026.
