Temporal Technologies raises $550M, Impulse Space secures $308M in week’s top U.S. deals
AI infrastructure and space-vehicle firms led a week of large funding rounds, each pulling in hundreds of millions.
The biggest U.S. startup financing of the week was dominated by two mega-rounds: Temporal Technologies closed a $550 million Series E and Impulse Space added $308 million in a Series D extension. Both deals signal continued investor appetite for deep-tech platforms that support artificial intelligence and orbital logistics, even as the market scales back from the multi-billion checks seen earlier in the year.
Temporal Technologies, based in Bellevue, Washington, announced a $550 million Series E that values the open-source AI-agent platform at $12.55 billion. The round was led by Lightspeed, Wellington Management, Goldman Sachs Alternatives and Tiger Global. The funding will be used to expand the company’s infrastructure for long-running AI agents and other enterprise workloads, positioning Temporal as a core building block for the next generation of AI applications.
Impulse Space, a Redondo Beach, California developer of space vehicles that move payloads between orbits, secured $308 million in a Series D extension. The new capital brings the total raised in the current round to $808 million. The infusion is expected to accelerate the company’s vehicle development program and support upcoming launch contracts, underscoring growing private-sector interest in orbital transportation services.
Other notable rounds included a $250 million Series E for Ridgeline, an AI-enabled investment-management platform headquartered in Incline Village, Nevada. Led by founder and chairman Dave Duffield, the round set a $1.45 billion valuation. Networking specialist Cornelis Networks of Wayne, Pennsylvania closed $205 million of new funding from IAG Capital Partners to advance its AI-focused high-performance computing interconnects. San Francisco-based Factory, which provides AI tools for enterprise software development, raised $200 million at a $5 billion valuation backed by a broad syndicate of venture firms and individual investors.
Marketing-tech startup Profound, located in New York, announced a $180 million Series D that values the company at $1.8 billion; Sequoia Capital and Kleiner Perkins led the round. In the tied seventh spot, San Francisco’s Arcee AI secured $150 million in Series B funding for its open-weight AI models, with Vista Equity Partners, Cambium Capital and Emergence Capital participating. Also tied at $150 million, Nex, a developer of family-oriented motion-based digital games, completed a mix of equity and debt financing led by Baillie Gifford and BAI Capital.
The list closed with Mazama Energy, a Seattle geothermal developer, raising $135 million in a Series B led by Centaurus Capital and Doerr Capital, and Ann Arbor-based Sling Therapeutics, which closed a $123 million Series C for its small-molecule therapy targeting thyroid eye disease, led by Forbion Capital Partners.
Across the ten deals, investors placed the bulk of capital into AI infrastructure, space logistics, and AI-enhanced financial services, while energy and biotech secured smaller but still significant rounds. The shift from earlier billion-dollar checks to high-hundred-million financings suggests a market recalibration toward more disciplined capital deployment. For founders, the data underscores the importance of aligning product roadmaps with investor expertise in AI and deep-tech domains. For venture firms, the concentration of capital in a handful of sectors may drive competitive dynamics around deal flow and valuation benchmarks. As the year progresses, market participants will watch whether the current focus on AI and space sustains its momentum or gives way to new emerging categories.