We track First In but have little verified detail yet.
Strategy
Geographies
United States
Funds
1| Fund | Vintage | Size | Strategy | Source |
|---|---|---|---|---|
| First In Fund III | 2026 | $148M | OtherCritical technology / SBIC · Early-stage | As of Mar 9, 2026VCWire |
Portfolio
1 totalRecent Investment Activity
1| Date | Company | Event | Amount | Valuation | Investors | Source |
|---|---|---|---|---|---|---|
| Dec 5, 2025 | Castelion | Series B | $350M | — | Altimeter CapitalLightspeed Venture PartnersLavrock VenturesAndreessen HorowitzGeneral CatalystFirst InBlueYard CapitalInterlagosSpace VCCantosAvenirChampion Hill outlined = lead | Castelion |
Co-Investors
10Latest Pulse
- Aug 19, 2026OpenAI Blinks First in AI Safety Standoff With AnthropicOpenAI told Axios it is slowing the release of its Astra model over cybersecurity risk and Sam Altman flagged signs of "misalignment," while Anthropic says its own safeguards mean no pause is needed -- a public role reversal between the two labs as both prepare for expected IPOs.→
- Aug 17, 2026Smack Technologies Raises $61M for Battlefield AISmack Technologies raised a $61 million Series B led by Costanoa Ventures and First In, bringing total funding past $90 million, months after the Pentagon labeled Anthropic a "supply-chain risk" and sent military branches scrambling for alternative AI vendors.→
- Aug 3, 2026Sequoia Leads $1B Round for Nuclear Startup ValarValar Atomics closed a $1B Series B led by Sequoia at a $6B valuation, tripling its April mark, weeks after its microreactor became the first in US history to power an Nvidia AI chip.→
- Jun 24, 2026OpenAI Unveils 'Jalapeño,' Its First Custom AI Chip, Built With Broadcom for Inference at ScaleOpenAI revealed Jalapeño, its first in-house silicon -- a chip designed with Broadcom and purpose-built for running AI models (inference) rather than training them. OpenAI says early results show 'significantly better performance-per-watt' than current state-of-the-art alternatives, marking its most concrete step yet to reduce a near-total dependence on Nvidia GPUs.→
Sources & methodologyshow
Where these figures come from
- Castelionprimary source1 fact
- VCWireValue Add VC data1 fact
Figures are labelled Reported (a source states it), Estimated, Derived (computed from other facts) or Rumored (in talks / unconfirmed). Rumors never replace a confirmed figure. Each figure keeps its own as-of date; history is preserved rather than overwritten.