Series I Investment Firms
There are 5 venture capital and private equity firms investing at the Series I stage. The most active by portfolio size are AT&T Ventures, ClearBridge Investments, and Octahedron Capital.
Last updated: 6 March 2026
AT&T Ventures
10 investments
Growth, Series D
Cybersecurity, Data & Analytics, Robotics & Automation …
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ClearBridge Investments
New York, New York, United States
4 investments
Growth, Series I
Data & Analytics, Robotics & Automation, Infrastructure & Cloud
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Octahedron Capital
San Francisco, California, United States
3 investments
Growth, Series I
Data & Analytics, E-Commerce & Marketplace
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Amazon Web Services
Seattle, Washington, United States
3 investments
Growth, Series I
Data & Analytics
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Ghisallo
Boston, Massachusetts, United States
3 investments
Growth, Series I
Data & Analytics, Mobility & Transportation
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