Data & AnalyticsAIFintechInfrastructure & CloudDefense & SpaceDeveloper ToolsHealthcareCybersecurity
Altimeter Capital focuses on growth investing in the technology sector, deploying capital across both private and public markets. The firm's strategy involves identifying long-term "secular winners" and "disruptor companies" in areas like software, internet, and cloud infrastructure, often taking concentrated positions in businesses benefiting from structural trends such as artificial intelligence.
Deal activity increased 143% year-over-year (17 deals in the last 12 months). Average disclosed round size is $514.5M (across 76 rounds with reported amounts).
Portfolio
78
Fund Size
$12.7B
Top Stage
Growth
Last 12 Mo
17
Team
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
DealsAvg Round Size
Portfolio
78 investments
| Company | Round | Amount | Date |
|---|---|---|---|
| XXbow | Series C | $120M | Mar 2026 |
 Cerebras Systems | Series H | $1B | Feb 2026 |
 LiveKit | Series C | $100M | Jan 2026 |
 Inferact | Series D | $150M | Jan 2026 |
 Parloa | Series D | $350M | Jan 2026 |
 Hadrian | Unknown | — | Jan 2026 |
| Hadrian | Growth | $180M | Jan 2026 |
 K2 Space | Series C | $250M | Dec 2025 |
| BBoom Supersonic | Growth | $300M | Dec 2025 |
 Castelion | Growth | $350M | Dec 2025 |
 Crusoe | Series E | $1.4B | Oct 2025 |
 Base Power | Series C | $1B | Oct 2025 |
 Vulcan Elements | Series C | $65M | Aug 2025 |
 OpenAI | Growth | $8.3B | Aug 2025 |
 Ramp | Growth | $500M | Jul 2025 |
| Castelion | Series B | $350M | Jul 2025 |
| Parloa | Series C | $105M | May 2025 |
| Base Power | Series B | $200M | Apr 2025 |
| K2 Space | Series B | $110M | Feb 2025 |
| OpenAI | Growth | $6.6B | Oct 2024 |
| SSigma Computing | Series D | $200M | May 2024 |
 CoreWeave | Growth | $1.1B | May 2024 |
| CoreWeave | Series C | $1.1B | May 2024 |
| Parloa | Series B | $61.7M | Apr 2024 |
 Unlearn | Series C | $50M | Feb 2024 |
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Top Co-Investors
Coatue Management18 shared
Redpoint Ventures17 shared
Tiger Global Management17 shared
Andreessen Horowitz15 shared
Sequoia Capital14 shared
Sutter Hill Ventures13 shared
D1 Capital Partners12 shared
Lightspeed Venture Partners11 shared
Founders Fund10 shared
Index Ventures10 shared
Iconiq Capital9 shared
Thrive Capital8 shared
Spark Capital8 shared
Fidelity Investments7 shared
Benchmark7 shared
Dragoneer Investment Group7 shared
Madrona Venture Group6 shared
Lux Capital6 shared
General Catalyst6 shared
Alkeon Capital Management6 shared
Last updated: 10 April 2026