Sphere Labs, an operating system for stablecoins, raised $2.80 million in a seed funding round led by The Chernin Group (TCG Crypto) and Jump Crypto, with participation from Hudson River Trading (HRT), Big Brain Holdings, Solana Ventures, Steel DAO, Stakeholder Capital (SHV), Republic Capital (ex Republic Labs), Cogitent Ventures, Anatoly Yakovenko, Raj Gokal, and Jordan Sexton.