Numeral
AI-powered software that automates sales tax and VAT compliance for global businesses.
$100MSeries C
ParticipantM
Mayfield
mayfield.com ↗Activity from announced rounds
Activity in this selectionOct 16, 2026 · Sep 17, 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
- 2
- Confirmed lead rounds
- 1 All roles disclosed
- New companies
- 2 First participation on record · 0 follow-on
- Funding in participating rounds
- $115M 2 disclosed · full round size, not this investor’s share
By stage
By primary sector
By country
Rounds
2 in this selectionHello 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