Greylock | Activity | F4

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Team Portfolio Raise Champions Essays

F4/Greylock/Activity

Greylock Activity

Every public signal F4 has attached to this firm, with sources and cross-entity links.

Types

Time range

3 investments· FEB 2026 – MAY 2026Show all

Investment

Led Altara's $7M seed round for AI infrastructure serving physical sciences companies.

Altara

Altara Greylock

greylock.com

MAY 5, 2026

MAY 5, 2026

Investment

Led Axiamatic's $54M Series A for AI-driven enterprise transformation.

Axiamatic

AxiamaticGreylock

techfundingnews.comMAR 13, 2026

MAR 13, 2026

Investment

Participated in Cogent Security's $42M Series A for AI-powered vulnerability remediation platform.

Cogent Security

Cogent Security Greylock

fortune.comFEB 18, 2026

FEB 18, 2026

Exit

Portfolio company Chronosphere acquired by Palo Alto Networks.

Chronosphere

Chronosphere Greylock

linkedin.comNOV 20, 2025

NOV 20, 2025