US Startup Funding Rounds: August 1-7, 2026
25 US startups raised $4.29B in named venture rounds between August 1, 2026 and August 7, 2026, led by Hadrian at $1.37B (Series D). Every round below comes from SEC filings and verified announcements. Investment funds, IPOs, post-IPO placements and valuation-only reports are excluded.
Prospecting these rounds? Fundz gives you the verified decision-makers at all 25 companies below — matched to your market, the moment a round lands. See plans →
| Company | Location | Amount | Round | Date | What they do |
|---|---|---|---|---|---|
| Hadrian | HAWTHORNE, CA | $1.37B | Series D | August 6, 2026 | Hadrian is a next-generation manufacturing company transforming the U.S. industrial base b… |
| Base | — | $1B | Series D | August 6, 2026 | Base is a customer marketing platform built to unlock customer-led growth by enabling B2B… |
| K2 Space | WEST HOLLYWOOD, CA | $500M | Series D | August 3, 2026 | K2 Space is developing a high-powered, low-cost satellite bus platform that delivers the c… |
| LifeMine Therapeutics | Watertown, Massachusetts | $263M | Series D | August 6, 2026 | LifeMine Therapeutics Inc. is a clinical-stage biopharmaceutical company pioneering Top-Do… |
| Horizon3.ai | San Francisco | $250M | Series E | August 3, 2026 | Horizon3.ai’s NodeZero® Offensive Security Platform enables continuous exposure management… |
| HappyRobot | San Francisco, California | $150M | Series C | August 4, 2026 | HappyRobot is a San Francisco-based company that specializes in AI-powered voice solutions… |
| LMArena | San Francisco, California | $150M | Series A | August 6, 2026 | LMArena is an open community platform for evaluating AI models, aiming to bring scientific… |
| Obsidian Security | Newport Beach | $85M | Series D | August 4, 2026 | Obsidian Security is the first truly comprehensive threat and posture management solution… |
| NN, Inc. | CHARLOTTE, NC | $75M | Series D | August 5, 2026 | NN, Inc., a global diversified industrial company, combines advanced engineering and produ… |
| Faye | Los Angeles | $50M | Series C | August 5, 2026 | Faye is redefining insurance with the first 100% digital, consumer-centric travel insuranc… |
| Aurelius Systems | San Francisco, California | $40M | Series A | August 5, 2026 | Aurelius Systems is developing autonomous laser weapons to counter modern drone threats. B… |
| Letter AI | Chicago, Illinois | $40M | Series B | August 7, 2026 | Letter AI is a Chicago-based sales startup that provides AI tools to streamline sales proc… |
| WindBorne Systems | PALO ALTO, CA | $37M | Series B | August 5, 2026 | Global sensing for better weather forecasts. WindBorne designs, builds, and operates a co… |
| Sapiom | Boston, Massachusetts | $35M | Series A | August 5, 2026 | Sapiom is a startup focused on developing financial infrastructure that allows AI agents t… |
| Inocras & Summit Pharmaceuticals International Corporation | San Diego, California | $31M | Series B | August 3, 2026 | Inocras Inc. and Summit Pharmaceuticals International Corporation are collaborating to bri… |
| Maximum | Miami, Florida | $30M | Seed | August 3, 2026 | Maximum is an AI-native operating system for banks that leverages AI at its core, providin… |
| Ambrook | Wyoming | $30M | Series B | August 5, 2026 | Ambrook's mission is to build a more prosperous and resilient future for America's family-… |
| Fluxco | Austin, Texas | $26M | Seed | August 7, 2026 | Fluxco is an Austin, Texas-based developer of an AI-powered procurement platform for elect… |
| Fly.io | San Francisco, California | $25M | Series D | August 3, 2026 | Fly.io is a provider of a connected cloud infrastructure platform designed for AI agents a… |
| Vori | San Francisco, California | $22M | Series B | August 6, 2026 | Vori is a provider of a self-driving operating system for grocery stores, focusing on auto… |
| June Homes | New York | $20M | Seed | August 3, 2026 | June Homes is a flexible housing operator that aims to bring transparency to the rental ma… |
| Baselayer | New York, New York | $20M | Series A | August 3, 2026 | Baselayer is an innovative B2B platform utilizing proprietary artificial intelligence tech… |
| Cirius Therapeutics | Grand Rapids, Michigan | $14.7M | Seed | August 5, 2026 | Cirius Therapeutics is a clinical-stage pharmaceutical company developing innovative thera… |
| RWX | Columbus, Ohio | $12M | Series A | August 4, 2026 | RWX is the company behind Mint, the Continuous Integration and Continuous Delivery (CI/CD)… |
| Eon | Denver | $10.8M | Seed | August 5, 2026 | Eon is changing the cloud data backup space by introducing a new storage tier that turns b… |
You have the 25 companies. Now get the people.
Every company above just closed a round — $4.29B of fresh budget between them. Fundz surfaces the verified decision-makers at each one, scored against your ICP, with the reason to reach out already written. New rounds land in your feed minutes after the filing, not next week.
See plansBook a demoFrequently asked
Which US startups raised funding between August 1, 2026 and August 7, 2026?
25 US companies closed named venture rounds between August 1, 2026 and August 7, 2026, raising $4.29B in total. The largest were Hadrian ($1.37B, Series D), Base ($1B, Series D), K2 Space ($500M, Series D). Every round is sourced from SEC filings and verified announcements, and excludes investment funds, IPOs and post-IPO placements so the list reflects genuine startup fundraising.
What was the largest US funding round of the week of August 1, 2026?
Hadrian of HAWTHORNE, CA raised $1.37B in a Series D round dated August 6, 2026. Hadrian is a next-generation manufacturing company transforming the U.S. industrial base by rapidly adding domestic manufacturing capacity through its It was the largest qualifying US venture round in this window, across 25 rounds totalling $4.29B.
How many US venture rounds closed this week?
25 named US venture rounds closed between August 1, 2026 and August 7, 2026, totalling $4.29B. This counts only rounds carrying a named series, from Seed through Series G+, raised by US-headquartered operating companies. Investment funds raising vehicles, IPOs, post-IPO equity and valuation-only reports are excluded, which is why this figure is lower than raw filing counts.
Funding data is compiled from SEC filings and verified announcements. Figures reflect the round size, not company valuation. See how Fundz turns these into conversations.