Venture capital fund · 3 deals
Every published round Altimeter Capital took part in, and every parcel of existing shares it bought off another holder. Deals we hold but haven't published yet are not counted.
| Company | Stage | Announced | Amount | Role | Alongside | Sources |
|---|---|---|---|---|---|---|
| Baseten | Series D+ | 16 Aug 2026 | $1.5b | Lead | Dealroom, Blackbird Ventures | |
| XBow | Series C | Mar 2026 | $120m | Participant | finance.yahoo.com | |
| Nexthop AI | Series B | Mar 2026 | $500m | Participant | invezz.com |
Companies Altimeter Capital has backed in a published round, and companies whose existing shares it bought off another holder.
| Company | What it does | First invested | Rounds | Led |
|---|---|---|---|---|
| XBow | Mar 2026, Series C | 1 | 0 | |
| Nexthop AI | Mar 2026, Series B | 1 | 0 | |
| Baseten | AI inference infrastructure platform | 16 Aug 2026, Series D+ | 1 | 1 |
Fund closes reported for Altimeter Capital, as distinct from the investments it has made.
Companies Altimeter Capital has backed that another company then bought. An exit for the holding, not a deal Altimeter Capital did.
Stories naming Altimeter Capital. Where several outlets covered the same round, they are bundled under whichever ran the fullest account.
Blackbird's post explaining its participation in Baseten's $1.5 billion Series F, its biggest investment yet, and why inference infrastructure will anchor the open-source AI era; notes rapid growth and senior engineering hires.
Also Dealroom
Xbow, a startup using AI for cybersecurity, has closed a $120 million round co-led by DFJ Growth and Northzone at a valuation topping $1 billion, with five other investors participating.
Nexthop AI, which builds networking gear for AI data centres, has banked $500 million in a Lightspeed-led round valuing it at $4.2 billion, and showed off three new switches.