Re:Build and Kalshi lead week’s massive funding rounds

Re:Build Manufacturing and Kalshi have closed the two largest U.S. startup funding rounds of the week, raising $2.1 billion and $1 billion respectively, according to Crunchbase.

Re:Build, which modernizes legacy manufacturing assets, secured the larger sum. Kalshi, a predictions marketplace operating under regulatory oversight, followed with its billion-dollar raise. Together the deals account for the bulk of the week’s largest reported rounds.

The size of these transactions stands out against a year that has already seen multiple nine-figure AI rounds, including Instinct’s $1 billion raise in October and Tenstorrent’s $1.5 billion Series E later that month. While AI continues to dominate headlines, the latest deals suggest a broader appetite for startups addressing highly regulated or capital-intensive sectors.

For Re:Build, the funding will likely accelerate its roll-up strategy, acquiring and upgrading industrial sites. Kalshi’s raise, meanwhile, could help it expand its offerings, though regulatory considerations may influence its growth. Both rounds were reported without lead investor details, leaving the composition of the syndicates as an open question.

Sources: news.crunchbase.com