# Biz Stone, Co-Founder and CEO > Biz Stone, Co-Founder and CEO. 9 investments on record. The rounds they were named in and the filings that name them, each with its source. Source: https://millionrounds.com/person/biz-stone (Millionrounds; every figure on the page links to its filing or article) Palo Alto, US · Partner # Biz Stone Co-Founder and CEO Email Stages *Series A* *Seed* Backs *AI* *Generative AI* *VR & AR* *Big Data & Analytics* Latest rounds - **Board** Series A · $20M Jun 2026 - **Sociability** Seed · $3.5M Jun 2025 - **AI Foundation** Round · $10M Sept 2018 Follow Biz Stone and see their new rounds in your feed. [Start following](https://millionrounds.com/login?join=1&why=follow&next=%2Fperson%2Fbiz-stone) Profile summary - **Rounds named:** 9 last Jun 2026 - **Filings:** - with regulators - **Books:** 2 written What this record rests on - ✓ **Named in rounds** 9 rounds name them - **On filings** No filing names them - ✓ **Own investor record** Their cheques, held under their name - **Claimed** Not claimed yet Titles come from the investor lists this database was built from, so read them as of their date. [Correct or remove](https://millionrounds.com/corrections?person=biz-stone)[Is this you? Claim it](https://millionrounds.com/claim?person=biz-stone) ## Their investor record [**Biz Stone, investing** Every cheque we watched them write, on one record **1** cheques in 12 months **9** all time **0** led deploying](https://millionrounds.com/fund/biz-stone) ## Rounds they were named in - **Rounds:** 9 - **Led:** 0 - **Disclosed:** $846.9M - **Active:** 2009–26 2026 - [Board](https://millionrounds.com/company/board) *Series A* **$20M** *US* Jun 2026 Joined · +6 investors 2025 - [Sociability](https://millionrounds.com/company/sociability) *Seed* **$3.5M** *AU* Jun 2025 Joined · +5 investors 2018 - [AI Foundation](https://millionrounds.com/company/ai-foundation) *Round* **$10M** *US* Sept 2018 Joined · +2 investors 2016 - [Magic Leap](https://millionrounds.com/company/magic-leap) *Round* **$793.5M** Feb 2016 Joined · +17 investors 2015 - [Lookup](https://millionrounds.com/company/lookup) *Series A* **$2.5M** *IN* Oct 2015 Joined · +4 investors · historical - [Lookup](https://millionrounds.com/company/lookup) *Series A* **$3M** *IN* May 2015 Joined · historical 2012 - [Intercom](https://millionrounds.com/company/intercom) *Seed* **$1M** *US* Jan 2012 Joined · +16 investors · historical 2011 - [Message Bus](https://millionrounds.com/company/message-bus) *Series A* **$3.4M** *US* Mar 2011 Joined · +10 investors · historical 2009 - [Square](https://millionrounds.com/company/square) *Series A* **$10M** *US* Nov 2009 Joined · +18 investors · historical Show 4 more rounds Show fewer By stage - Series A **5** - Seed **2** - Round **1** - Round **1** What they backed AI **4** Generative AI **2** VR & AR **1** Big Data & Analytics **1** B2C **1** Healthcare **1** Alongside - [First Round Capital *2*](https://millionrounds.com/fund/first-round-capital) - [500 Startups *1*](https://millionrounds.com/fund/500-startups) - Alibaba Group Holding *1* - [Alphabet *1*](https://millionrounds.com/fund/alphabet) - [Andreessen Horowitz *1*](https://millionrounds.com/fund/andreessen-horowitz) - [Andrew Rasiej *1*](https://millionrounds.com/fund/andrew-rasiej) - [Andy McLoughlin *1*](https://millionrounds.com/fund/andy-mcloughlin) - [BoxGroup *1*](https://millionrounds.com/fund/boxgroup) Rounds where a report named this person rather than a firm, matched on name: read it as a strong hint, not proof, since people share names. ## Companies they are listed as backing Portfolio - [AI Foundation](https://millionrounds.com/company/ai-foundation) - [Beyond Meat](https://millionrounds.com/company/beyond-meat) - [Blue Bottle Coffee](https://millionrounds.com/startup/blue-bottle-coffee) - [Factmata](https://millionrounds.com/startup/factmata) - [Faraday Bicycles](https://millionrounds.com/startup/faraday-bicycles) - [GYANA](https://millionrounds.com/startup/gyana) - [Intercom](https://millionrounds.com/company/intercom) - [Jelly](https://millionrounds.com/startup/jelly-3) - [Kosas](https://millionrounds.com/startup/kosas) - [Launchpad Toys](https://millionrounds.com/startup/launchpad-toys) - [Lookup](https://millionrounds.com/startup/lookup) - [Magic Leap](https://millionrounds.com/company/magic-leap) - [Medium](https://millionrounds.com/startup/medium) - [Message Bus](https://millionrounds.com/startup/message-bus) - [Millions](https://millionrounds.com/startup/millions) - [Nest](https://millionrounds.com/startup/nest-2) - [Pinterest](https://millionrounds.com/company/pinterest) - [Scoodle](https://millionrounds.com/startup/scoodle) - [Slack](https://millionrounds.com/company/slack) - [Transparent Financial Systems](https://millionrounds.com/startup/transparent-financial-systems) - [Visit](https://millionrounds.com/startup/visit) - [YOLO](https://millionrounds.com/company/yolo) - [≈åURA](https://millionrounds.com/startup/ura) - Bridgefy - Jelly Industries - Oxwash - Twitter - Workpop Show 18 more Show fewer ## Their books - Things a Little Bird Told Me: Confessions of the Creative Mind Biz Stone · 2014 3.93 from 3,915 ratings on Goodreads About the book Biz Stone, the co-founder of Twitter, discusses the power of creativity and how to harness it, through stories from his remarkable life and career. Things a Little Bird Told Me From GQ 's "Nerd of the Year" to one of Time 's most influential people in the world, Biz Stone… On AmazonListen on Audible - Who Let the Blogs Out?: A Hyperconnected Peek at the World of Weblogs Biz Stone · 2004 3.35 from 49 ratings on Goodreads About the book Blogs--or weblogs--are a huge phenomenon on the internet. From ultra-personal diary entries to specialized information on a wide variety of subjects (teen ranting to presidential campaigns), blogs are the new way to create a virtual community that can effect real-world change.… On AmazonListen on Audible More books for founders and investors on the [Reading List](https://millionrounds.com/reading-list). As an Amazon Associate we earn from qualifying purchases. ## Find people like Biz Filter every partner and angel by firm, kind, market and whether we watched them invest. Free with an account. Search people[How we know what we know](https://millionrounds.com/methodology)