Funding
← Back to your selection

Mayfield

mayfield.com ↗Activity from announced rounds

Activity in this selectionOct 16, 2026 · Jul 19, 2026

Venture investor whose recorded companies include optical connectivity developer Lumilens and tax compliance software company Numeral.

From infrastructure to applications

Mayfield backs technology founders and describes an AI investment view spanning semiconductors and applications. In explaining its Lumilens investment, the firm points to a practical constraint on AI growth: moving data between processors and racks as clusters become larger. It sees optical connectivity as an essential infrastructure layer.

Activity represented here

Lumilens develops optical transceivers and near-package and co-packaged optics for AI systems. Numeral, also listed in Mayfield’s official portfolio, builds software for sales-tax compliance. They address different business needs within the recorded funding history. The deals below are the announcements available in RoundOS; Mayfield’s official portfolio is the source for its wider set of investments.

Sources
Rounds participated in
5
Confirmed lead rounds
1
2 roles undisclosed
New companies
4
First participation on record · 1 follow-on
Funding in participating rounds
$278M
4 disclosed · full round size, not this investor’s share

By stage

Series C+2
Pre-seed1
Seed1
Series A1

By primary sector

AI2
Hardware2
Enterprise software1

By country

United States5

Rounds

5 in this selection
Numeral

AI-powered software that automates sales tax and VAT compliance for global businesses.

$100MSeries C
Participant
Hello Haven

A personal AI assistant that remembers a user's preferences and helps manage everyday tasks through app, text, email or phone conversations.

$15MPre-Seed
Lead
Hang Ten Systems

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

$53MAdditional seed funding
Participant
Velaura AI

Develops ultra-low-power silicon for AI data centers and Physical AI systems

$110MSeries A
Role not disclosed
Lumilens

Lumilens develops optical interconnects for connecting GPUs in AI data centers.

>$700MSeries C
Role not disclosed