Walden Catalyst — 2026 Investments

3 investments dated 2026 · listed companies and verified rows first · show all

Nace AInace.aiMay 2026 · $21.5M

Nace provides AI-powered verification and automation for financial processes, including audit, accounting, compliance, and deal due diligence.

AI & Machine LearningEnterprise SoftwareFintechPalo Alto, US

Sudha Valluru(Founder)inLucas Tsao(Founder)Stephen V(Founder)Zhanibek Datbayev(Founder)inDos Baha(Founder)

Co-investors.406 Ventures Coalition Operators General Catalyst MVP Ventures

RadixArkradixark.ai 𝕏May 2026 · $100M

RadixArk builds open-source AI infrastructure for large-scale model training and inference, including the SGLang inference engine and Miles reinforcement learning framework.

AI & Machine LearningData & InfrastructureDeep Tech

Banghua Zhu(Founder)in

Co-investorsAccel HOF Capital Sky9 Capital Transpose Platform Management Vocal Ventures AMD Ventures +6 more

Other

Tracked investments with no reachable website or further public details — typically companies that wound down, renamed, or were absorbed.

Polaris Electro-Optics

Rows marked “SEC filing” are inferred from directors named on the company's SEC Form D — public regulatory data, not a portfolio list published by the firm.