US Startup Funding Rounds: September 21, 2026 – September 27, 2026
25 US venture rounds closed between September 21, 2026 and September 27, 2026, led by Island at $400M (Series F).
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 |
|---|---|---|---|---|---|
| Island | Dallas, Texas | $400M | Series F | September 24, 2026 | What if the enterprise had complete control over the browser? What would it mean for security, for productivity, for work itself? Introducing Islan… |
| Enveda | Boulder, Colorado | $311M | Series E | September 23, 2026 | Enveda is a biotechnology company that is learning from life’s chemistry to create better medicines faster. Enveda uses AI-powered tools to identify a… |
| Precision Neuroscience | NEW YORK, New York | $250M | Series D | September 24, 2026 | Precision Neuroscience is working to provide breakthrough treatments for the millions of people worldwide suffering from neurological illnesses. The c… |
| eMed | Miami, Florida | $200M | Series A | September 21, 2026 | eMed is a Miami-based digital healthcare company that uses artificial intelligence to reshape employee wellness and expand healthcare access. The star… |
| Hubble Network | Seattle, Washington | $200M | Series C | September 27, 2026 | Hubble Network is the world’s first satellite-powered Bluetooth network, enabling Bluetooth devices to connect directly to orbit. The company focuses … |
| Rightway | Saginaw, New York | $155M | Series E | September 24, 2026 | Rightway is the leader in driving healthcare value for everyone, everywhere. Its care navigation and PBM platforms guide over one million members to t… |
| Vessl AI | San Francisco, California | $150M | Series C | September 23, 2026 | VESSL AI provides an end-to-end MLOps platform that enables high-performance ML teams to build, train, and deploy models faster at scale. |
| Rainmaker Technology Corporation | California | $100M | Series B | September 21, 2026 | Rainmaker Technology Corporation is a next-generation cloud seeding company based in El Segundo, Calif. The company uses weather-resistant drones to p… |
| Numeral | San Francisco, California | $100M | Series C | September 27, 2026 | Numeral, founded in 2023 and based in San Francisco, handles the intricacies of sales tax compliance for both ecommerce and SaaS companies, providing … |
| Go.AI™ | Chicago, Illinois | $85M | Series A | September 22, 2026 | Go.AI™ is the leading provider of on-premises, examiner-ready AI infrastructure tailored for regulated industries. The company focuses on delivering i… |
| Watney | — | $80M | Series A | September 23, 2026 | Watney develops dexterous robots for data center operations, focusing on automating physical tasks like cable swaps and server restarts. The company h… |
| Firecrawl | San Francisco, California | $75M | Series B | September 22, 2026 | Firecrawl is the web data toolkit for AI. Built for developers and AI teams, Firecrawl's full suite of tools for crawling, searching, and extracting w… |
| BigHat Biosciences | SAN MATEO, California | $75M | Series C | September 24, 2026 | BigHat’s mission is to improve human health by making it far easier to design advanced, next-generation antibody therapeutics. Our AI-enabled experim… |
| Warp | Los Angeles, California | $60M | Series B | September 26, 2026 | Warp empowers logistics, supply chain, and operations leaders to reduce freight costs, accelerate delivery timelines, and gain complete visibility, al… |
| Confido | Seattle, Washington | $55M | Series B | September 22, 2026 | Confido Legal is an integrated payment processing platform specifically designed to help legal technology firms embed payments and money movement feat… |
| Ande | New York, New York | $52M | Seed | September 22, 2026 | Ande is an AI-native network for corporate entertainment that aims to centralize and streamline the booking and expense management process for enterpr… |
| Moir | Palo Alto, California | $50M | Seed | September 21, 2026 | Moir is an identity verification company founded by an ex-Google and xAI staffer aimed at combating deepfakes and helping people verify their identiti… |
| AvenCell Therapeutics | Cambridge, Massachusetts | $47M | Series C | September 27, 2026 | AvenCell Therapeutics, Inc. is a leading clinical-stage cell therapy company that focuses on advancing autologous and allogeneic switchable CAR-T cell… |
| HIFI | New York, New York | $37M | Series A | September 24, 2026 | HIFI is the stablecoin infrastructure company that focuses on integrating traditional banking systems with blockchain technology for improved market o… |
| Catena Labs | Boston, Massachusetts | $30M | Series A | September 21, 2026 | Catena Labs is building the first AI-native financial institution to provide the financial infrastructure and services AI systems need to conduct comm… |
| PicoJool | Palo Alto, California | $27.5M | Series A | September 24, 2026 | PicoJool Inc. is developing next-generation optical chips and modules for high-bandwidth, low-cost connectivity in hyperscale AI data centers. Founded… |
| CORRIDOR | Overland Park, Kansas | $25M | Seed | September 21, 2026 | — |
| Ramona Optics | DURHAM, North Carolina | $25M | Series A | September 22, 2026 | Ramona is the microscopy toolset for cutting-edge biological scientists. We unlock a new perspective on cellular-level research. Our advanced comp… |
| Mojave Energy Systems | Sunnyvale, California | $25M | Series B | September 23, 2026 | Mojave produces novel liquid desiccant systems designed to change the nature of air conditioning by dramatically increasing energy efficiency and redu… |
| Spott | San Francisco, California | $21M | Series A | September 22, 2026 | Spott is an AI-native recruiting platform aimed at transforming how recruitment agencies operate. The startup focuses on automating entire workflows t… |
Frequently asked
Which US startups raised funding between September 21, 2026 and September 27, 2026?
25 US companies closed named venture rounds between September 21, 2026 and September 27, 2026, raising $2.64B in total. The largest were Island ($400M, Series F), Enveda ($311M, Series E), Precision Neuroscience ($250M, Series D). 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 September 21, 2026?
Island of Dallas, Texas raised $400M in a Series F round announced September 24, 2026. What if the enterprise had complete control over the browser? What would it mean for security, for productivity, for work itself? Introducing Island, the Ent 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 September 21, 2026 and September 27, 2026, totalling $2.64B. 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.
See plans