William Eisenbeis

William Eisenbeis is an established investor and advisor with more than 25 years of experience in mergers and acquisitions, principal investing, and strategic advisory across financial technology, financial services, market structure, software, and data and information services. He currently serves as an Advisory Director at Eterna Growth Partners, where he focuses on partnering with growth companies at the intersection of fintech, software, and data‑driven business models.

Previously, Will was an Advisory Director at Charlesbank Capital Partners, a General Partner at SARORAS Private Capital, and an Operating Partner at Welsh, Carson, Anderson & Stowe, helping lead investments and value‑creation initiatives in high‑growth fintech and information services businesses. Earlier in his career, he held senior roles at Merrill Lynch and Citadel LLC.

Will holds an M.B.A. in Finance from Columbia Business School and a B.S. in Mandarin, Economics, and Asian Studies from Georgetown University. With deep domain expertise in fintech, market structure, and data‑rich software platforms, he brings valuable perspective to THEIA’s work in AI‑powered disclosure intelligence as the Company scales RRX™ and related offerings for global investment stakeholders.