Walden Catalyst Ventures

Walden Catalyst Ventures accounts for 9 tracked companies with verified cap-table data, 9 of which disclose round sizes totalling $2B. The median disclosed raise is $110M, and the largest is Ursa Major Technologies at $506M, ahead of Ursa Major ($506M) and Pliops ($345M).

The names that recur most often on these portfolio cap tables are Walden Catalyst Ventures (9 companies), True Ventures (3 companies), BlackRock (2 companies), XN (2 companies), Alsop Louie Partners (2 companies), Alpha Edison (2 companies). By latest disclosed round, the market skews Series E (2), Series D (2), Series A (2), Series B (1).

• Companies tracked: 9
• Disclosed funding total: $2B across 9 companies
• Median disclosed raise: $110M
• Largest raise: Ursa Major Technologies — $506M
• Stage mix: Series E 2 · Series D 2 · Series A 2 · Series B 1
• Most recent dated round: 2025-11-18

Best funded Walden Catalyst Ventures companies

1. Ursa Major Technologies — $506M (latest: Series E)
2. Ursa Major — $506M (latest: Series E)
3. Pliops — $345M (latest: Series D)
4. Empower Semiconductor — $215M (latest: Series D)
5. ArteraAI — $110M
6. Amperesand — $93M (latest: Series A)
7. MindsDB — $77M
8. Speedata — $70M (latest: Series A)
9. ATI — $31M (latest: Series B)

Walden Catalyst Ventures — related firms and companies (52)

• Ursa Major Technologies
• Ursa Major
• Pliops
• Empower Semiconductor
• ArteraAI
• Amperesand
• MindsDB
• Speedata
• ATI
• Walden Catalyst Ventures co-investors 2026
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