Manufacturing Giant Re:Build Secures $2.1B, Kalshi Hits $1B in Weekly Megadeals

The latest Crunchbase Megadeals board recorded a striking concentration of capital in physical-technology and prediction-market businesses. The two largest announcements were a $2.1 billion infusion into manufacturing partner Re:Build and a $1 billion Series G for New York-based predictions marketplace Kalshi, underscoring investor confidence in companies that blend hardware, data and market insight.

Re:Build, a six-year-old startup based in Framingham, Massachusetts, closed a $2.1 billion financing round led by General Catalyst and JPMorgan Chase. The company works with industrial partners from product design through to large-scale production, positioning itself as a full-stack manufacturing collaborator. The size of the round places Re:Build among the few U.S. firms to cross the two-billion-dollar threshold in a single financing, signaling robust appetite for end-to-end production platforms.

Kalshi announced a $1 billion Series G round headed by Wellington Management and Sequoia Capital. The funding lifted the company’s post-money valuation to $40 billion and coincided with a reported annualized trading volume exceeding $1 trillion. Kalshi’s marketplace lets users trade on the outcome of real-world events, a model that has attracted both speculative traders and institutional participants seeking hedging tools.

Other sizable deals spanned construction automation, biotech, battery materials and defense technology. San Francisco-based Bedrock Robotics secured $600 million in a Series C led by CapitalG and Emergence Capital, bringing its total capital close to $1 billion and valuing the firm at $4.1 billion. In biotech, Dren Bio raised $350 million from Juvia Group and Lightspeed Venture Partners to advance antibody therapies for blood cancers and autoimmune disorders. Battery-materials specialist Group 14 Technologies added $169 million in a Series D extension and announced a new production line in Sagunto, Spain, marking its first European footprint. Defense-oriented Firehawk Aerospace and enterprise-AI startup Serval each closed rounds of $150 million, valuing Firehawk above $1.4 billion and Serval at $3 billion.

Three companies tied for the $100 million tier. AI cloud provider General Compute attracted a Series A led by Blackbird and Abstract to expand its infrastructure with inference chips from Cerebras Systems, SambaNova and Positron AI. Foundry Robotics, focused on autonomous factories, raised $100 million in a Series A backed by Marlinspike. Data-analytics platform Hex Technologies also secured $100 million, setting a $1.2 billion valuation after a round led by Peak XV and 137 Ventures.

The weekly snapshot reflects broader market dynamics. Crunchbase data shows that, to date in 2026, investors have poured roughly $48 billion into Series B financings, the highest total recorded for that stage. At the same time, the volume of large Series A rounds has contracted, leaving early-stage founders to meet higher revenue expectations and longer path-to-profit timelines despite the visibility of megadeals.

Looking ahead, the concentration of capital in physical AI, predictions markets and specialized hardware suggests that investors are betting on tangible, data-driven solutions that can scale across traditional industries. Founders operating in these spaces may find more receptive capital, while those in purely software-only models could face tighter funding conditions. The coming months will reveal whether the current megadeal momentum sustains or gives way to a more balanced distribution of venture dollars across the startup ecosystem.