PE Firm · Capital Allocator
01 Advisors
MediumHeadquarters not yet mapped · Website
Last verified
9/20/2026
Firm Overview
49
Portfolio tracked
0
Sectors
0
Regions
9/20/2026
Last verified
Growth-stage technology investment firm founded by Dick Costolo and Adam Bain.
Leadership
Dick Costolo
Co-Founder and Managing Partner
Dick is a Co-Founder and Managing Partner at 01 Advisors and the former CEO of Twitter.
Adam Bain
Co-Founder and Managing Partner
Adam is a Co-Founder and Managing Partner at 01 Advisors and the former COO of Twitter.
David Heller
Managing Partner
David is a Managing Partner at 01 Advisors and formerly served as the VP of Corporate Development and Strategy at Twitter.
Portfolio Companies
Source: https://01a.com/portfolio
Portfolio Web Readiness
Not yet assessed
The assessment covers whether AI crawlers and search engines can reach and parse the public site, page performance, transport and security hygiene, and discoverability. 49 portfolio companies have a website on record.
Observational measurements of these companies' public websites only. Not a rating of the companies, their performance, their management, or their investment merit. Not investment advice. Request a correction or removal via Submit Update.
This profile is based on publicly available information and may be incomplete or outdated. PE Firm Index is not affiliated with 01 Advisors and does not provide investment advice.
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