Investors / United States / Altimeter
Altimeter
Venture capital · Menlo Park, CA, United States · North America
Altimeter is a technology-focused investment firm that manages funds investing in both public and private markets. It positions itself as a long-term partner to companies as they enter the public markets.
Invests inAI & Machine LearningEnterprise Software
In its own wordstechnologypublic marketsprivate marketsgrowth
Your fit with Altimeter
Four questions about your startup
See how your round matches what it backs, point by point.
Or find every investor that fitsAltimeter lists 27 checked portfolio companies on its own site and is named in 35 funding rounds, 8 of them as lead. Its most frequent entry is Growth, 40% of the companies with a known first round. Its largest themes are AI & Machine Learning (54%), Enterprise Software (18%) and Cybersecurity (10%). 82% of its companies are based in United States. It invests most often alongside Andreessen Horowitz, Lightspeed Venture Partners and DataPower Ventures.
Counts come from funding rounds that name Altimeter, complete from mid-2025: earlier rounds appear only when they were reported later. Round amounts and full round histories are on Fundup AI.
Entry stage
share of companies by the stage of its first roundShow as a table
| Value | |
|---|---|
| Pre-seed | 0% |
| Seed | 16% |
| Series A | 16% |
| Series B | 28% |
| Growth | 40% |
Activity by year
rounds it joined, last 10 yearsShow as a table
| Total | Rounds it led | |
|---|---|---|
| '17 | 0 | 0 |
| '18 | 0 | 0 |
| '19 | 0 | 0 |
| '20 | 0 | 0 |
| '21 | 0 | 0 |
| '22 | 1 | 0 |
| '23 | 0 | 0 |
| '24 | 0 | 0 |
| '25 | 15 | 3 |
| '26 | 19 | 5 |
Investor profile
percentile among all firmsShow as a table
| Measure | Percentile of all firms | Value |
|---|---|---|
| Portfolio size | 64th | 27 companies |
| Recent activity | 99th | 22 rounds in 12 months |
| Early stage | 56th | 16% of entries at pre-seed or seed |
| Evidence | 52th | 0% of companies confirmed by a round |
| Sector focus | 86th | 54% in its largest sector |
| Reach | 84th | 6 countries |
Investment themes
share of its checked companiesThis firmAll checked companies
Show as a table
| This firm | All checked companies | |
|---|---|---|
| AI & Machine Learning | 54% | 18% |
| Enterprise Software | 18% | 8% |
| Cybersecurity | 10% | 4% |
| Industrial & Manufacturing | 6% | 7% |
| Education | 4% | 7% |
| Space & Defense | 4% | 3% |
| Media & Entertainment | 2% | 4% |
| Healthcare & Biotech | 2% | 15% |
Invests most often with
firms sharing its portfolio companiesShow as a table
| Share | |
|---|---|
| Andreessen Horowitz | 8 |
| Lightspeed Venture Partners | 8 |
| DataPower Ventures | 7 |
| Spark Capital | 7 |
| Avenir | 6 |
| Founders Fund | 6 |
| General Catalyst | 6 |
| 137 Ventures | 5 |
Its portfolio companies
where they are based, and what their own sites showSite status
- Site answers2696%
- No longer answers00%
- Points to another company14%
- Parked or sold domain00%
A site that stops answering three checks in a row is counted as no longer answering; that is not proof of closure. A site that points to another company is often an acquisition.
Co-investor network
who it backs companies with, and who they back togetherAll co-investors or Compare portfolios with Andreessen Horowitz
Compare Altimeter head to head
portfolio size, rounds, entry stages, themes and the companies both backThree or more firms at once: portfolio overlap.
Recent portfolio activity
when companies last raised with Altimeter| Date | Company | Stage |
|---|---|---|
| 9 Nov 2026 | Series A | |
| 9 Sept 2026 | Round | |
| 8 Sept 2026 | Series C+ | |
| 1 Sept 2026 | Seed Led | |
| 19 Aug 2026 | Series C+ | |
| 4 Aug 2026 | Series A Led | |
| 30 Jul 2026 | Series C+ | |
| 19 Jun 2026 | Series C+ Led |
Round details for Altimeter
Amounts, full round histories and every co-investor in Altimeter's rounds are on Fundup AI. VCinfo covers investors and their portfolios.
Portfolio
27 companies checked against their own sites| Company | What it does | Themes | First round with it | Evidence |
|---|---|---|---|---|
| Anthropic develops AI models and products, including the Claude models, and conducts AI safety research. | AI & Machine LearningEnterprise Software | Sept 2025Series C+ · 3 rounds | Funding round | |
| Attestable provides zero-knowledge proofs for AI integrity to guarantee the safety of AI systems worldwide. | AI & Machine LearningCybersecurity | Feb 2026Seed | Funding round | |
| Base Power provides home energy solutions, including backup power and energy savings, to homeowners in Texas and Illinois. | EducationIndustrial & Manufacturing | Apr 2025Series B · 2 rounds | Funding round | |
| Baseten brings inference, training, and execution together on one platform to power companies | AI & Machine LearningSpace & Defense | Jun 2026Series C+ | Funding round | |
| Boom builds supersonic airliners and natural gas turbines from scratch | AI & Machine LearningAI & Machine Learning | Dec 2025Series B | Funding round | |
| Castelion designs, tests, and manufactures next-generation military systems rapidly and at massive scale to deter future wars. | AI & Machine LearningAI & Machine Learning | Jul 2025Series B · 2 rounds | Funding round | |
| Cerebras develops and provides artificial intelligence technology and infrastructure | AI & Machine LearningCybersecurity | Sept 2025Series B | Funding round | |
| Cognition operates an autonomous software engineer called Devin that helps human engineers with repetitive work and focuses on problem solving and designing systems. | AI & Machine LearningEnterprise Software | Sept 2026Series C+ | Funding round | |
| Covenant designs and builds a long-range, heavy-payload strike system | AI & Machine LearningAI & Machine Learning | Sept 2026Round | Funding round | |
| The company provides cloud-based artificial intelligence infrastructure and services | AI & Machine LearningCybersecurity | Oct 2025Series C+ | Funding round | |
| Elorian AI develops artificial intelligence models that understand and reason through visual medium | AI & Machine Learning | Apr 2026Seed | Funding round | |
Media & EntertainmentEducation | Sept 2025Series C+ | Funding round | ||
| Groq operates a cloud platform for running AI inference, built on its own LPU chips and combined with NVIDIA GPUs. | AI & Machine LearningEnterprise Software | Sept 2025Series C+ | Funding round | |
| Hadrian manufactures precision parts and operates factories for production and inspection | Industrial & ManufacturingAI & Machine Learning | Jan 2026Round · 2 rounds | Funding round | |
| Hammerspace provides a data platform for AI and high-performance computing | AI & Machine LearningEnterprise Software | Apr 2025Series B | Funding round | |
| Inferact provides a platform to run inference at the cost-performance frontier, allowing control over cost, latency, and throughput tradeoffs for models and workloads. | AI & Machine LearningSpace & Defense | Jan 2026Seed | Funding round | |
| K2 Space builds high-power satellite platforms | AI & Machine LearningAI & Machine Learning | Feb 2025Series B · 3 rounds | Funding round | |
| LiveKit provides a framework and platform for building, testing, and deploying AI agents for voice, video, and physical applications | AI & Machine LearningEnterprise Software | Jan 2026Series C+ | Funding round | |
| MotherDuck provides a cloud data warehouse built on DuckDB for data teams, software engineers, and founders to transform, report, and gain insights from their data. | Enterprise SoftwareAI & Machine Learning | Nov 2022Series A | Funding round | |
| Nov 2026Series A | Funding round |
About this data
site last read 5 Nov 2026- Site
- altimeter.com
- Last read
- 5 Nov 2026
- Watching since
- 6 Nov 2026
- Rounds since
- 15 Nov 2022
- Companies checked
- 27
Rates come from what VCinfo has observed since observation_start. Firms tend to remove companies that closed, so early rates understate reality. A company leaving a portfolio page does not mean it closed or exited. An unreachable site means our checks failed, nothing more.
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