Mayfield

mayfield.com ↗Activity from announced rounds

Activity in this selectionUnited States · Jun 30, 2026 · Jun 1, 2026

Mayfield is an early-stage technology investor focused on being the first institutional backer of AI founders, with most of its investments beginning at company inception.

Its AI investing reaches into the physical infrastructure needed for adoption as well as software. The firm’s Lumilens investment addresses optical connectivity between processors and computing systems, illustrating its interest in technical bottlenecks below the application layer.

Mayfield’s CXO of the Future community connects it with enterprise leaders. That commercial perspective complements its inception-stage work when founders need to understand the requirements of corporate buyers for a new technology.

Sources
Rounds participated in
3
Confirmed lead rounds
—
3 roles undisclosed
New companies
2
First participation on record · 1 follow-on
Funding in participating rounds
$274M
3 disclosed · full round size, not this investor’s share

By stage

Seed1
Series A1
Series C+1

By primary sector

Hardware2
AI1

By country

United States3

Rounds

3 in this selection
Hang Ten Systems

Combines AI agents and engineering services for enterprise software development and technology projects.

$32MSeed
Role not disclosed
Upscale AI

Provides open-standard AI networking infrastructure for ultra-low-latency training and inference

$190MSeries A+
Role not disclosed
AttoTude

Pioneers ASIC over Dielectric interconnect for high-bandwidth, energy-efficient AI infrastructure connectivity

$52MSeries C
Role not disclosed