Arena
Arena evaluates AI models through comparisons and observations of how people use them in real tasks.
$200MSeries B
ParticipantF
Felicis
felicis.com ↗Activity from announced rounds
Activity in this selectionUnited States · Oct 16, 2026 · Sep 17, 2026
An early-stage venture firm with recorded investments spanning AI evaluation, industrial software and defense technology.
Investment approach
Felicis backs technology founders, with a strong emphasis on early investment. The firm reports that 94% of its investments are at seed or Series A. Its support can continue as companies grow: it describes leading Arena’s Series A after investing in the seed round.
Companies represented in RoundOS
The recorded funding announcements include Arena, which uses human comparisons to evaluate AI models; Magentic, which builds software for work in physical industries; and Smack Technologies, which develops AI for national security. Felicis discusses all three in its own investment materials. The round history below covers the announcements captured by RoundOS; Felicis maintains its broader company portfolio on its own website.
Sources
- Rounds participated in
- 2
- Confirmed lead rounds
- 0 All roles disclosed
- New companies
- 1 First participation on record · 1 follow-on
- Funding in participating rounds
- $275M 2 disclosed · full round size, not this investor’s share
By stage
By primary sector
By country
Rounds
2 in this selectionSolcoa Industries
Solcoa Industries produces rare-earth metals using halide-free chemistry and modular reactors designed and operated in-house.
$75MSeed financing; equity, debt, and equipment financing
Participant