Prometheum

Prometheum

Prometheum was founded in 2017 by a team of securities lawyers and financial services veterans, including brothers Aaron Kaplan and Ben Kaplan as co-CEOs. The firm set out to prove that existing U.S. securities laws could accommodate digital assets, rather than requiring new legislation or regulatory exemptions. Its structure relies on a network of FINRA-member and SEC-registered subsidiaries — ProFin for capital formation, ProATS for trading, and ProCap for custody and post-trade services. The firm's strategy centers on the full lifecycle of blockchain-based securities: issuance through ProFin, custody through Prometheum Capital as a qualified custodian, correspondent clearing for traditional broker-dealers, and secondary-market trading via the pending Prometheum ATS. Prometheum targets digitally-native securities, tokenized assets, and cryptocurrency, aiming to serve both institutional and retail customers. It does not disclose AUM or deployment. Prometheum operates from New York City and does not publicly disclose additional offices or total headcount. Its executive team includes a former SEC Branch Chief in Rosemarie Fanelli as chief regulatory officer, alongside advisors such as economist Arthur Laffer and Nobel laureate Michael Spence. The firm has not announced a recent operational event from the last 24 months that is verifiable from public sources. Prometheum’s structural differentiator is regulatory-first engineering: it built its custody and broker-dealer infrastructure to comply with the SEC’s special purpose broker-dealer framework before any competitor. That choice gives it a first-mover status as a qualified custodian for digital asset securities within the traditional financial system, but also limits its market to SEC-compliant assets, which remain a fraction of the crypto market.