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PolySign
PolySign was founded by Arthur Britto and David Schwartz, who co-designed the XRP Ledger and co-founded Ripple.
PolySign
PolySign was founded by Arthur Britto and David Schwartz, who co-designed the XRP Ledger and co-founded Ripple. CEO Jack McDonald previously led Conifer Financial Services, growing AUA from $5B to $125B, and served as a UBS executive. The firm operates out of Oakland, California, targeting institutional adoption of digital assets. The firm focuses on infrastructure for securing and transacting digital assets, including a proprietary 3rd-generation private blockchain and a custody solution. PolySign targets asset classes including digital assets and blockchain-based securities, with a technology stack designed for capital markets and payments. The firm's leadership includes a retired Vice Chairman of BNY Mellon who oversaw custody for 25% of global institutional assets. Confirmed geographic focus is North America. The firm's team includes former Ripple and financial services executives, with no disclosed AUM or deployment numbers. PolySign's website emphasizes relationships with financial institutions and adherence to regulatory standards, but no recent operational events are publicly available. Adjacent structures or philanthropic vehicles are not disclosed. A structural differentiator is the involvement of Ripple's co-founders and chief cryptographer, giving PolySign deep blockchain expertise at the design level. The firm's proprietary blockchain is built from scratch for institutional security and compliance, distinguishing it from firms using existing public blockchains.
General information
Firm type
Asset Manager
Year founded
—
AUM
Undisclosed
Location
Region
North America
Country
United States
City
Oakland
Corporate office
Oakland, CA, United States
Principals
Arthur Britto
Co-founder
David Schwartz
Co-founder and Chief Cryptographer
Jack McDonald
CEO
Sector focus
Frequently asked questions
Who runs investment decisions at PolySign?
CEO Jack McDonald, who previously led Conifer Financial Services, oversees the firm's strategy. Co-founders Arthur Britto and David Schwartz provide technical direction. No CIO is publicly named.
How does PolySign source proprietary deal flow?
PolySign builds its own technology rather than investing in external companies. Its deal flow is not disclosed; the firm positions itself as an infrastructure provider, not an investor.
Is PolySign structured as a single family office or does it operate more like a venture firm?
PolySign operates as a technology company developing digital asset infrastructure for institutions. It is not a family office or venture firm.
Does PolySign participate in fund commitments or only direct deals?
The firm's disclosed activities focus on building its own custody and blockchain products. No fund commitments or direct investments are reported.
What investment stages does PolySign typically target?
PolySign does not invest in stages; it builds infrastructure for institutional digital asset custody and transactions.
Which sectors does PolySign explicitly avoid?
The firm does not disclose sectors it avoids. Its disclosed focus is exclusively on digital asset infrastructure for financial institutions.
How is PolySign related to Ripple?
Co-founders Arthur Britto and David Schwartz also co-founded Ripple and co-designed the XRP Ledger. PolySign is a separate company leveraging their blockchain expertise (per firm website).
Profile maintained by Altss using OSINT (open-source intelligence), regulatory filings, licensed data partners, and verified direct submissions. Read the methodology. Last updated: . Continuous refresh with full update cycles at least every 30 days.
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