This is a weekly feature that runs down the week’s top 10 announced funding rounds in the U.S. Check out last week’s biggest funding deal roundup here.

While no billion-dollar rounds led this week’s list, we nonetheless saw a variety of startups in industries ranging from semiconductors to aerospace to biotech raise sizable rounds. The week’s biggest deal was $400 million for SiFive, a semiconductor startup challenging incumbent with chip designs built on an open rather than proprietary standard.

1. , $400M, semiconductors: San Mateo, California-based semiconductor startup SiFive raised a $400 million Series G round led by . SiFive makes the blueprints used by companies such as to develop their own internal chip designs, on an open standard called RISC-V. CEO Reuters he expects the raise to be SiFive’s last funding round before an IPO, though didn’t say when an offering would take place.

2. , $200M, aviation: Hermeus, an El Segundo, California-based startup developing autonomous military aircraft, raised $200 million in equity in a -led round. The company, which is developing what it says will be the fastest unmanned defense aircraft, also raised $150 million in debt as part of the round, which pushes its valuation to $1 billion. Other investors in the deal include , and

3. $137M, biotechnology: San Diego-based Sidewinder, a biotech startup developing cancer drugs to target difficult-to-treat tumors, raised a $137 million Series B led by and . The company is developing next-generation cancer drugs called antibody-drug conjugates, or ADCs, which are designed to act like “guided missiles” by using engineered antibodies to deliver toxic payloads directly into tumor cells. The company said its new funding will be used to push its lead drug candidates into clinical trials.

4. , $125M, AI infrastructure: Palo Alto, California-based Aria Networks raised $125 million in a -led Series A funding round. The company develops an AI-driven networking platform that monitors, analyzes and optimizes data center performance.

5. , $111.7M, aerospace: Starfish Space, a Seattle-based startup developing and manufacturing autonomous space vehicles that perform in-orbit, satellite servicing missions, raised $111.7 million. The Series B round was led by , and . Starfish’s spacecraft dock to satellites already in orbit to service and reposition them. They can also remove defunct satellites and debris from space.

6. (tied) , $100M, biotechnology: Cambridge, Massachusetts-based Stipple Bio raised a $100 million Series A round to advance its precision cancer therapies. The round was led by , and . Stipple aims to develop highly targeted cancer treatments that selectively attack cancer cells while minimizing damage to healthy tissue.

6. (tied) , $100M, health insurance: led the $100 million Series E for Chapter, a New York-based startup offering a Medicare navigation platform that provides advisory services for seniors seeking health coverage. Other investors include ​​, and 1.

8. , $85M, fintech: Modus, a Philadelphia-based startup, raised $85 million in a -led seed and Series A round. The startup describes itself as a tech‑enabled audit platform that acquires CPA firms and equips them with AI‑driven audit tools to deliver higher‑quality audits. and also participated in the deal.

9. , $80M, medical devices: and led the $80 million Series C for Menlo Park, California-based Endovascular Engineering, also called E2, which has developed a device called Hēlo for the treatment of venous thromboembolism, or VTE. The company secured clearance for Hēlo in December.

10. , $80M, biotechnology: Boston-based Life Sciences, which aims to develop drugs to promote longevity and find treatments for age-related diseases, says it raised $80 million in Series D funding. The company says it will use the funding to advance human trials of its cellular rejuvenation therapy, called ER-100, which aims to make older, damaged cells act younger again. Investors in the round were not disclosed. The company has previously been backed by , , , and.

Methodology

We tracked the largest announced rounds in the Crunchbase database that were raised by U.S.-based companies for the period of April 4-10. Although most announced rounds are represented in the database, there could be a small time lag as some rounds are reported late in the week.

Illustration:

This is a weekly feature that runs down the week’s top 10 announced funding rounds in the U.S. Check out last week’s biggest funding deal roundup here.

This week featured a lot of funding deals with a lot of zeroes on the end. Generative AI powerhouse , of course, boasted the most zeroes with its $30 billion Series G, the second-largest venture funding round of all time. Other big fundraisers included robotics startup , fusion innovator , and space tech unicorn .

1. , $30B, Generative AI: Anthropic in a massive Series G funding round that values the San Francisco-based generative AI company at $380 billion post-money. The financing marks the largest venture funding deal of 2026 so far and the second-largest of all time, per Crunchbase data. and led the raise, which was also “co-led” by , , , and , according to the company.

2. , $520M, humanoid robots: AI-powered robotics company Apptronik added $520 million in new financing in an extension of its $415 million Series A raise in February 2025, The investment brings the total round to over $935 million for the Austin-based company.

3. , $450M, fusion energy: Livermore, California-based fusion power startup Inertia Enterprises announced that it secured $450 million in Series A funding. led the round for the 2-year-old company, joined by , and other backers.

4. , $350M, space tech: Axiom Space, a startup that is building a successor to the International Space Station and developing spacesuits for a moon mission, closed on $350 million in new financing. and led the round for the Houston-based company.

5. , $315M, AI: Runway, an AI research and technology startup, picked up $315 million in a Series E round. led the financing, which set a $5.3 billion valuation for the New York-based company, up from $3.3 billion last April.

6. , $210M, mental health: Talkiatry, a provider of in-network psychiatry services to health systems and employers, picked up $210 million in Series D funding, led by . The round brings total funding to date for the New York-based company to more than $400 million.

7. , $130M, healthcare: Redwood City, California-based Solace Health, a digital platform that connects patients with expert healthcare advocates, raised $130 million in Series C funding. led the financing, which set a valuation of over $1 billion for the 4-year-old company.

8. , $118M, healthcare: Garner Health, a digital platform that helps patients find healthcare providers, raised $118 million in Series D financing. led the round for the New York-based company.

9. (tied) , $100M, AI simulation: Palo Alto, California-based Simile, a startup focused on applying AI to create simulated environments and simulation tools with AI agents, raised $100 million in Series A funding led by .

9. (tied) , $100M, dog longevity: Loyal, a startup focused on drugs to extend healthy lifespans in senior dogs, raised $100 million in Series C funding that it says will provide the capital required to move from late-stage development to market readiness. Venture fund led the financing for the 7-year-old, San Francisco-based company.

Methodology

We tracked the largest announced rounds in the Crunchbase database that were raised by U.S.-based companies for the period of Feb. 7-13. Although most announced rounds are represented in the database, there could be a small time lag as some rounds are reported late in the week.

Illustration:

This is a weekly feature that runs down the week’s top 10 announced funding rounds in the U.S. Check out last week’s biggest funding deal roundup here.

Startup investors offered fresh evidence once again that there is plenty of capital available for favored companies. Autonomous driving unicorn and robotaxi operator led the pack this week, with $16 billion in fresh funding at a $126 billion valuation. Other large round recipients were also overwhelmingly AI companies, with additional activity in aviation and space tech.

1. , $16B, autonomous driving: Waymo, the autonomous driving company spun out of nearly 10 years ago, raised $16 billion in new funding at a $126 billion post-money valuation. , and l led the round, along with a long list of other investors. The Mountain View, California-based company it plans to enter 20 more cities this year, including Tokyo and London.

2. , $1B, AI processors: Cerebras Systems, a developer of large, fast AI processors, closed a $1 billion Series H round. led the financing, which set a post-money valuation of approximately $23 billion for the Sunnyvale, California-based company.

3. , $500M, AI audio: New York-based ElevenLabs, a developer of AI audio technology, secured a $500 million Series D round led by . The round sets an $11 billion valuation for ElevenLabs, more than tripling from a year ago. The company also reported over $330 million in annual recurring revenue last year.

4. , $300M, aviation: Skyryse, an aviation hardware and software company developing an operating system for flight as well as aircraft called the Skyryse One, landed over $300 million in Series C funding at a valuation over $1 billion. and led the financing for the 10-year-old, El Segundo, California-based company.

5. (tied) , $270M, construction robotics: Bedrock Robotics, a startup developing robotics technology for the construction industry, raised over $270 million in Series B funding. and Valor Atreides AI Fund led the financing, which reportedly set a valuation around $1.75 billion for the roughly 2-year-old, San Francisco-based company.

5. (tied) , $270M, space tech: Austin-based CesiumAstro, a provider of connectivity hardware and software for the space and defense industries, secured $270 million in Series C equity financing and $200 million in debt funding. led the equity portion while and provided the debt.

7. , $230M, AI infrastructure: Positron, a developer of energy-efficient AI inference hardware, picked up $230 million in Series B funding at a post-money valuation of more than $1 billion. , and co-led the financing for the Reno, Nevada-based company.

8. , $225M, enterprise AI: Fundamental, a developer of AI models to build predictions from enterprise data, emerged from stealth and announced it raised a $225 million Series A led by . The San Francisco-based company, founded in 2024, also had a previously undisclosed $30 million seed round.

9. , $175M, weather technology: Boston-based Tomorrow.io, developer of an AI-native weather satellite constellation, closed on $175 million in equity financing led by and . The company says it has fully deployed its first 13- satellite constellation.

10. , $150M, AI research lab: AI research lab Goodfire raised $150 million in Series B funding at a $1.25 billion valuation. B Capital led the financing for the San Francisco-based startup.

Methodology

We tracked the largest announced rounds in the Crunchbase database that were raised by U.S.-based companies for the period of Jan. 31-Feb. 6. Although most announced rounds are represented in the database, there could be a small time lag as some rounds are reported late in the week.

Illustration:

This is a weekly feature that runs down the week’s top 10 announced funding rounds in the U.S. Check out last week’s biggest funding deal roundup here.

The pace of big funding rounds continued to hold up at brisk levels this past week, led by a $1.4 billion financing for “robot brain” developer . More big rounds went to startups in sectors including AI chips, brain-computer interfaces, defense tech, biotech and airplanes, among others.

1. , $1.4B, robotics: Skild AI, a robotics company building an “omni-bodied” brain to operate any robot for any task, announced it raised $1.4 billion, tripling its valuation to over $14 billion. led the Pittsburgh-based startup’s latest financing, which comes just over seven months after it raised a at a $4.5 billion valuation.

2. , $500M, AI and semiconductors: Etched.ai, a startup working on chips for AI superintelligence, reportedly $500 million in new funding. led the financing, which was said to set a $5 billion valuation for the Silicon Valley-based company.

3. , $252M, brain-computer interfaces: Merge Labs, a -founded startup based in San Francisco, which is working on brain-computer interfaces that interact with the brain at high bandwidth and integrate with advanced AI, reportedly locked up a $252 million seed round. According to reports, was the largest backer.

4. , $250M, biotech: San Diego-based Mirador Therapeutics, a precision medicine startup developing therapies for immune-mediated inflammatory and fibrotic diseases, it closed on $250 million in Series B funding. The company said the round brings total capital raised to more than $650 million since it launched in March 2024.

5. (tied) , $200M, defense tech: Defense tech startup Onebrief has raised another $200 million and reportedly acquired a small battle simulation company, . and led the Series D funding for Honolulu-based Onebrief, which makes AI-driven collaborative and planning software used for military operations.

5. (tied) , $200M, media: , an Ethereum treasury company, that it made a $200 million equity investment into Beast Industries — also known as MrBeast — the Greenville, South Carolina-based entertainment and consumer products company founded by creator .

7. , $175M, aerospace: Long Beach, California-based JetZero, a developer of planes with much higher fuel efficiency and lower carbon emissions than existing commercial airliners, picked up $175 million in Series B financing led by . Founded in 2020, JetZero says it is looking to enter commercial service in the early 2030s.

8. , $143M, voice AI: Deepgram, an API platform for voice AI, secured $130 million in Series C funding led by at a $1.3 billion valuation. San Francisco-based Deepgram also announced that it acquired , an AI voice platform for restaurants and drive-thru operators.

9. , $136M, defense tech: Colorado Springs, Colorado-based Defense Unicorns, a provider of software delivery for national security mission systems, locked up $136 million in a Series B round led by .

10. (tied) , $120M, robotics: Mytra, a developer of industrial robotics technology for warehouse operations, raised $120 million in a Series C round led by . Founded in 2022, Brisbane, California-based Mytra has raised close to $200 million to date, .

10. (tied) , $120M, AI for manufacturers: Boston-based Tulip Interfaces, a developer of AI-enabled tools for manufacturers to digitize processes and improve production, says it secured $120 million in Series D funding backed by .

Methodology

We tracked the largest announced rounds in the Crunchbase database that were raised by U.S.-based companies for the period of Jan. 10-16. Although most announced rounds are represented in the database, there could be a small time lag as some rounds are reported late in the week.

Illustration: