Re:Build raised $2.1 billion and Kalshi $1 billion in a week when money flowed to factories, robots and AI tools that could shape what businesses buy.
A manufacturing startup called Re:Build raised $2.1 billion this week, the biggest U.S. startup funding round Crunchbase News tracked from Oct. 24 to Oct. 30, 2026. Right behind it was Kalshi, a New York predictions marketplace, which raised $1 billion. Much of the rest of the top 10 went to robots, construction machines and AI software.
Re:Build works with industrial companies and inventors from the first product design all the way to large-scale production. General Catalyst and JPMorganChase led the round. The company is 6 years old and based in Framingham, Massachusetts.
Kalshi's $1 billion round was led by Wellington Management and Sequoia Capital. It values the company at $40 billion. Kalshi says the trading on its marketplace now adds up to more than $1 trillion a year. That figure is the company's own claim.
Firehawk Aerospace (propulsion technology, over $150 million), General Compute (AI cloud, $100 million) and Hex Technologies (data analytics, $100 million) rounded out the list. Crunchbase's summary notes that four of the 10 rounds went to robots, factories or construction equipment.
Several of these companies sell to other businesses. Serval builds coding agents, which are AI programs that carry out software tasks with little human help. Hex is building an AI-based tool for analyzing data. If you buy software, expect more AI features to be pitched to you.
The factory and construction bets point to a possible shift in how physical products get made. Investors are betting that automation will spread beyond software into plants and job sites. Whether that pays off is still unproven.
The article does not say how Re:Build plans to spend its $2.1 billion or what the company is now worth. It also does not say when any of these products will reach customers. Crunchbase notes some rounds may be reported late, so the list could shift slightly.
Investors are putting huge sums into factories, robots and business AI tools, so expect more of them to be pitched to your company.
A former Nvidia product manager has started Udu Technologies to let African startups and institutions rent AI computing power instead of buying it.
Read more: Ex-Nvidia engineer starts company to bring AI computing power to AfricaGenRobot AI raised $100 million to record how people work, so robot makers can use those recordings to teach machines home, factory and warehouse tasks.
Read more: Beijing startup raises $100 million to teach robots by watching peopleRecruiters say AI now handles much of the screening work, so employers may start asking what a fee of a share of a new hire's salary actually pays for.
Read more: AI is speeding up hiring and putting recruiter fees under pressure
