US Startup Funding Rounds: May 25, 2026 – May 31, 2026
25 US venture rounds closed between May 25, 2026 and May 31, 2026, led by Cognition AI at $1B (Series D).
Every round below is a named venture round by a US-headquartered company, sourced from SEC filings and verified announcements. Investment funds, IPOs, post-IPO placements and valuation-only reports are excluded.
| Company | Location | Amount | Round | Date | What they do |
|---|---|---|---|---|---|
| Cognition AI | San Francisco, California | $1B | Series D | May 29, 2026 | Cognition AI is a developer of an AI-powered coding assistant that launched its generative AI coding tool, Devin, just over a year ago. Devin is posit… |
| Stord | Atlanta | $250M | Series F | May 26, 2026 | With FulfillmentWorks, the company says it has increased its first-party warehouses, coupled with its network of over 400 warehouse partners and 15,00… |
| Focused Energy Inc. | Austin | $240M | Series A | May 27, 2026 | Focused Energy is a German American company spun off from the Technical University of Darmstadt in 2021 that will enable safe, clean, and virtually in… |
| XCENA | San Jose, California | $135M | Series B | May 29, 2026 | Founded in 2022, XCENA is a fabless semiconductor company developing intelligent memory solutions and data-centric computing architecture built on Com… |
| OpenRouter | New York, New York | $113.5M | Series B | May 26, 2026 | OpenRouter is the emerging standard for AI inference at scale, offering a single, standards-compatible API that gives developers and enterprises seaml… |
| Strive | Bothell | $106.1M | Seed | May 29, 2026 | STRIVE delivers the only platform proven to optimize muscle performance for elite athletes and teams. Through proprietary algorithms and sensors that … |
| Thea Energy | Princeton, New Jersey | $100M | Series B | May 27, 2026 | Thea Energy Inc. is a fusion energy company focused on leveraging recent breakthroughs in stellarator physics and engineering to create a faster, simp… |
| Garner Health | New York, New York | $100M | Series E | May 28, 2026 | Garner Health is a health technology company and employee benefit that uses massive datasets and AI to identify doctors, helping users find quality, i… |
| WeRoad | — | $58M | Series C | May 27, 2026 | WeRoad is a community of travelers united by their will to discover faraway countries and cultures and their desire to share this experience with thei… |
| ClearNote Health | San Diego, California | $52M | Series D | May 27, 2026 | ClearNote Health is a privately held company dedicated to improving early detection and monitoring for some of the deadliest forms of cancer. Develope… |
| Orbital Industries | San Francisco, California | $50M | Series B | May 28, 2026 | Orbital Industries is a startup focusing on the design of advanced materials using artificial intelligence. It recently raised $50 million in Series B… |
| Gray Swan | Pittsburgh, Pennsylvania | $40M | Series A | May 28, 2026 | Gray Swan is the AI security platform for enterprises building the next generation of intelligent systems. The company focuses on helping enterprises … |
| Windfall Bio | Menlo Park | $37M | Series B | May 26, 2026 | Windfall Bio is a nature-based agricultural technology company that harnesses methane-eating microbes to transform harmful methane into organic soil n… |
| Secretome Therapeutics | DALLAS, TX | $30M | Series A | May 27, 2026 | Secretome Therapeutics is developing a platform of first-in-class therapeutics derived from neonatal mesenchymal stem cells (nMSC) for the treatment a… |
| Saris | San Francisco, California | $28.8M | Series A | May 28, 2026 | Saris provides agentic workflow automation for banks and credit unions, automating the manual, high-volume work that slows lending, compliance, and op… |
| NavigateAI | San Francisco, California | $25M | Seed | May 26, 2026 | NavigateAI is building the trusted AI copilot for the physical world, aiming to improve how physical spaces are built and maintained. The platform pro… |
| ATOM | — | $23.7M | Seed | May 27, 2026 | ATOM is an enterprise Treasury Management System (TMS) developed by Financial Sciences Corporation. It is designed to serve Fortune 500 treasury teams… |
| Triomics | SAN FRANCISCO, CA | $22M | Series B | May 27, 2026 | Triomics combines the most advanced clinical trial tracking software with a global network of supersites and partners to deliver rapid, cost-effective… |
| Solstice | Vancouver | $21M | Series A | May 28, 2026 | This news release contains certain forward-looking statements (“FLS”) including but not limited to, the terms of the Offering, the use of proceeds of … |
| Waypoint Bio | New York, New York | $20M | Series A | May 27, 2026 | Waypoint Bio is a biotechnology company pioneering novel cell therapies for solid tumors using in vivo spatial pooled screening technology. The compan… |
| Tensormesh | San Francisco, California | $20M | Seed | May 27, 2026 | Tensormesh is a company focused on enhancing AI server efficiency by creating a commercial version of the open-source LMCache utility. The technology … |
| Drafted | San Francisco, California | $16M | Seed | May 29, 2026 | Drafted is a startup that leverages AI to transform home design ideas into detailed floor plans and 3D layouts. Founded by Nick Donahue, it aims to si… |
| CasaPerks Technologies | AUSTIN, TX | $15.8M | Seed | May 26, 2026 | — |
| Trajectory | San Francisco, California | $15M | Seed | May 28, 2026 | Trajectory is a San Francisco-based research and product lab building the first platform for continual learning. This platform helps AI-native compani… |
| Allo | San Francisco | $14M | Series A | May 25, 2026 | Allo.xyz is a protocol for Real World Assets and Bitcoin and the largest RWA marketplace by assets, with: - $2bn+ in assets, 1,500+ RWAs and 20,000… |
Frequently asked
Which US startups raised funding between May 25, 2026 and May 31, 2026?
25 US companies closed named venture rounds between May 25, 2026 and May 31, 2026, raising $2.53B in total. The largest were Cognition AI ($1B, Series D), Stord ($250M, Series F), Focused Energy Inc. ($240M, Series A). Each round below is sourced from SEC filings and verified announcements, and excludes investment funds, IPOs and post-IPO placements.
What was the largest funding round of the week of May 25, 2026?
Cognition AI of San Francisco, California raised $1B in a Series D round announced May 29, 2026. Cognition AI is a developer of an AI-powered coding assistant that launched its generative AI coding tool, Devin, just over a year ago. Devin is positioned as t It was the largest US venture round recorded in this window across 25 qualifying rounds.
How many US venture rounds closed this week?
25 named US venture rounds closed between May 25, 2026 and May 31, 2026, totalling $2.53B. This counts only rounds with a named series (Seed through Series G+) by US-headquartered operating companies. Investment funds raising vehicles, IPOs, post-IPO equity and valuation-only reports are excluded so the figures reflect genuine startup fundraising.
These are the rounds. Fundz gives you the people to call at each one — verified decision-makers matched to your market, the moment a round lands.
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