Altimeter Capital
VC Fund
Menlo Park, United States
Altimeter Capital is a technology-focused investment firm based in Menlo Park, CA and Boston, MA. Altimeter manages a long/short public equity fund and growth-stage private capital funds.
- Total investments:
- 144
- Last investment:
- Lead investor:
- 42%
- Fund size:
- $40M
- Last fund:
Last updated:
For AI agents: llms.txt
Industries Altimeter Capital invests in
Stages Altimeter Capital invests in
Countries Altimeter Capital invests in
Contacts
| Name | Phone | Socials | |
|---|---|---|---|
| See all 8 contacts → | |||
Investment Focus
Industry
- Software 32 (22%)
- Artificial Intelligence 19 (13%)
- Analytics 14 (10%)
- SaaS 13 (9%)
- Information Technology 13 (9%)
Stage
- Series C 27 (19%)
- Series B 24 (17%)
- Series D 23 (16%)
- Series E 15 (10%)
- Series F 12 (8%)
Country
- United States 75 (52%)
- India 3 (2%)
- Germany 2 (1%)
- United Kingdom 2 (1%)
- China 1 (1%)
Team
| Name | Title | Investments | Links | |
|---|---|---|---|---|
Gwendolyn Umbach
Investor
|
Investor | Total investments: 0 | Find email | |
Jamin Ball
Partner
|
Partner | Total investments: 21 | Find email | |
Pauline Yang
Partner
|
Partner | Total investments: 6 | Find email | |
Brad Gerstner
Founder & CEO
|
Founder & CEO | Total investments: 21 | Find email | |
|
John Kiernan
Chief Financial Officer and Partner
|
Chief Financial Officer and Partner | Total investments: 0 | Find email | |
| See all 8 team members → | ||||
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| SciFin is an AI-powered revenue intelligence platform designed to close the “context gap” faced by modern revenue teams. Sales information is often scattered across CRM systems, emails, call notes, documents, spreadsheets, people, and multiple AI tools. SciFin brings this information together to create a more complete and current view of deals,accounts, representatives, pipelines, and territories. The platform helps sales leaders and revenue operations teams identify at-risk deals earlier, improve forecasting, understand rep and pipeline performance, and reduce the time spent manually collecting and reconciling information. Sales managers can use the resulting context to focus coaching where it matters most, while sales representatives can quickly understand account history, risks, open questions, and next steps before customer meetings. | $44M / Seed / Sep 01, 2026 | ||
| Castelion is a defense tech company that develops and manufactures modern weapons systems for the U.S. military. | $800M / Series C / Aug 19, 2026 | ||
| Castelion is a venture-backed defense tech company applying modern hardware development and manufacturing processes to critical national security challenges, specifically to solve affordability, scale, and supply chain robustness. The company combines vertical integration, rapid iteration, and high-cadence testing to build hardware that isengineered from the ground up for scalable production.Castelion’s core offerings include solid-rocket motors, missile avionics, flight-control systems, seekers, and full strike-weapon assemblies, all designed for compatibility with existing military launch platforms. | $800M / Series C / Aug 19, 2026 | ||
| Thrive Holdings is an investment firm that partners with businesses capable of being transformed through the strategic application of technology, aiming for long-term, sustainable growth. The firm is known for its hands-on approach, working closely with portfolio companies to embed advanced technological solutions and operational expertise. | $2B / Private Equity / Aug 12, 2026 | ||
| Volta is a vertically integrated AI infrastructure platform. The company develops, finances, builds, and operates AI factories by integrating institutional capital, powered land, data centers, compute, software, and operations. | $300M / Series A / Aug 04, 2026 | ||
| K2 Space builds and supplies high-power satellite platforms designed for diverse orbital missions using vertically integrated hardware and manufacturing processes. The company focuses on developing large “Mega Class” satellites with enhanced power, payload capacity, and propulsion systems to support communications, sensing, and other spaceapplications. K2 Space offers engineered solutions for factory assembly, launch stacking, and orbital operations that aim to serve Low Earth Orbit, Medium Earth Orbit, and Geostationary missions. Its offerings include resilient spacecraft designs tailored to withstand harsh space environments and support scalable constellation deployments. | $500M / Series D / Jul 30, 2026 | ||
| Elorian specializes in creating AI models that can handle a variety of data kinds simultaneously. | $55M / Seed / Apr 09, 2026 | ||
| XBOW operates autonomously, carrying out commands and analyzing the results to achieve higher-level objectives. | $120M / Series C / Mar 18, 2026 | ||
| Nexthop AI develops AI infrastructure and custom networking solutions for large cloud operators, focusing on enhancing operational efficiency and connectivity within complex network environments. The company offers a range of services, including network automation, data management, and analytics, enabling clients to optimize their networkperformance and streamline their operations. Through its innovative solutions, Nexthop AI addresses the challenges faced by cloud operators, providing tools that facilitate seamless integration and scalability in dynamic computing environments. Additionally, Nexthop AI emphasizes compatibility with open-source network operating systems, allowing clients to leverage existing technologies while implementing advanced networking strategies. | $500M / Series B / Mar 10, 2026 | ||
| OpenAI is an AI research and deployment company that conducts research and develops machine learning technologies. OpenAI works on projects that involve autonomous learning and task performance. It serves industries such as technology, healthcare, and education. | $122B / Venture - Series Unknown / Feb 27, 2026 | ||
| See all 144 investments → | |||
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FAQ
What does Altimeter Capital invest in?
Altimeter Capital invests primarily in Software, Artificial Intelligence and Analytics startups, most often at Series C and Series B stage. Most of the 144 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.
How do I contact Altimeter Capital?
Public channels for Altimeter Capital include LinkedIn and the website linked on this profile. For a verified work email and phone number, create a free Shizune account — contact data is searched across 20+ sources and validated before delivery, so your outreach lands in the right inbox.
Who are the partners at Altimeter Capital?
The team at Altimeter Capital includes Gwendolyn Umbach (Investor), Jamin Ball (Partner) and Pauline Yang (Partner), among 8 team members tracked by Shizune. The Team section lists each member with their title, investment count and links.
Is Shizune's investor data accurate?
Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Oct 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.
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