Oak Investment Partners Co-Investors 2026

Oak Investment Partners accounts for 5 tracked companies with verified cap-table data, 5 of which disclose round sizes totalling $798M. The median disclosed raise is $75M, and the largest is Circle at $357M, ahead of nLIGHT ($290M) and NanoH2O ($75M).

The names that recur most often on these co-invested cap tables are Oak Investment Partners (5 companies), a16z crypto (1 company), BlackRock (1 company), Apollo Funds (1 company), Intercontinental Exchange (1 company), SBI Group (1 company). By latest disclosed round, the market skews IPO (1), Series D (1), Series B (1).

• Companies tracked: 5
• Disclosed funding total: $798M across 5 companies
• Median disclosed raise: $75M
• Largest raise: Circle — $357M
• Stage mix: IPO 1 · Series D 1 · Series B 1
• Most recent dated round: 2026-05-01

Best funded Oak Investment Partners companies

1. Circle — $357M
2. nLIGHT — $290M (latest: IPO)
3. NanoH2O — $75M (latest: Series D)
4. FreshBooks — $73M (latest: Series B)
5. Cogent Communications Group — $2.5M

Oak Investment Partners — related firms and companies (48)

• Circle
• nLIGHT
• NanoH2O
• FreshBooks
• Cogent Communications Group
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