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Greylock Portfolio Companies

Investor actively backing innovative startups and growth-stage companies across various industries and funding rounds.

Last updated: June 2026

Greylock Investment Overview

Portfolio Companies
202
Total Invested
$4.1B
Average Investment
$33.0M

Complete List of Greylock Portfolio Companies (202)

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#CompanyStageAmountLocation
201ImpermiumSeries A$8.0MRedwood City, United States
2021000memoriesSeries A$2.5MSan Francisco, United States
Artificial Intelligence (AI)Cyber SecuritySecurityService Industry

Impermium is a cyber-security company using ML to protect Internet sites against account hijacking and malicious user behavior & content.

Redwood City, United States
November 2011
$8.0M
Series A

Founder Contacts

19,000+ verified contacts

Online PortalsPhotographyPhoto Sharing

1000Memories allows people to organize, share, and discover old photos and memories and set up family trees.

San Francisco, United States
February 2011
$2.5M
Series A

Founder Contacts

19,000+ verified contacts

Showing 201-202 of 202 portfolio companies

Frequently Asked Questions About Greylock

How many companies has Greylock invested in?

Greylock has invested in 202 companies tracked in our database. The portfolio spans multiple industries and funding stages, from seed-stage startups to late-stage companies.

What industries does Greylock invest in?

Greylock's top investment sectors include Artificial Intelligence (AI), Cyber Security, Security, Service Industry, Online Portals. The firm invests across 7 different industry categories.

What is Greylock's largest investment?

Among tracked funding rounds, Impermium received $8.0M in a Series A round. Greylock's total known invested capital is $4.1B.

What is the average investment size for Greylock?

Greylock's average investment size is $33.0M across its portfolio of 202 companies.

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