BB

Bill Bartee

General Partner, Main Sequence Ventures

📍 Greater Sydney Area, Australia🔄 Updated September 2026💼 9 investments📅 28 years investing🗓 Last invested Feb 2025𝕏 @upgrade_to_unlock
VC🌍 Australia
9
Total investments
4
Early stage
2
Mid stage
1
Late stage
28y
Years active

Portfolio

7 investments · sorted by recency
All investments
Early stage
Mid stage
Late stage
Seed Investor
Feb 2025
A quantum computer harnesses the fundamental forces that govern the physical world. It can efficiently model complex systems in ways that would take the best classical computer millions of years, and so help revolutionise drug design, climate modelling, battery chemistry, and many other vital processes. But to achieve all this, we need to make quantum computers work reliably at scale. We started Universal Quantum to meet this challenge - because we believe that by doing so, we can help solve the most difficult problems faced by humanity. We’re following a pragmatic, engineering-based roadmap to build a device that is useful in the real world: a quantum computer that has utility. Every approach we take, every solution we devise, is geared towards this goal.
Series A investor and observer
Jul 2024
Diraq is building quantum computers based on modified silicon transistors, the technology best suited to achieving utility scale, when value far outweighs cost. Diraq’s mission is to become the global leader in the development of utility-scale quantum computing with millions of qubits on one silicon chip. Diraq’s silicon technology is designed to be integrated into standard data centers. It runs on a single quantum chip, packaged together with classical electronics that operate at cryogenic temperatures, connected to supporting electronics at room temperature. Founded in Sydney, Australia, Diraq has operations in Sydney and Melbourne, Australia, and is expanding rapidly in the United States with operations in Palo Alto, Los Angeles, Boston, and Chicago. To learn more, please visit www.diraq.com
Board Observer
Oct 2018
Gilmour Space Technologies is a leading Australian-owned company that is developing and launching LEO launch vehicles and new satellite platforms. Need to launch? Please email us for more info at: launch@gspace.com Linkedin: Gilmour Space Technologies | Facebook: GilmourSpace | Twitter: @GilmourSpace
Series A investor and observer
Sep 2017
Self-driving is hard, your choice of LiDAR shouldnt be. Baraja has invented a new type of LiDAR called Spectrum-Scan™ which delivers the highest performance available to address the challenge of self-driving cars. Baraja is a rapidly growing start-up, with a revolutionary LiDAR for self-driving vehicles. Our HQ is based in Sydney, Australia, with offices in China and the USA. We are quickly expanding worldwide, hiring through Europe and Asia, closely collaborating with car manufacturers to iterate and refine our vision of what LiDAR needs to be.
Lead Seed, Series A, and Series B Investor
2017
Make quantum technology useful. We are the first to achieve quantum advantage through AI-powered infrastructure software.
Seed Investor
Oct 2015
Process Street is a modern process management platform for teams. We help teams share their core processes, then transform them into powerful no-code workflows. Start with employee onboarding to set up new hires for success, then build all sorts of workflows like customer implementation, content approvals and tenant screening. Manage your team wiki and company handbook 100% free. Join Salesforce, Colliers, Drift and 3,000+ others who use Process Street today.
Series A Investor
Feb 2015
Culture Amp is the world’s leading employee experience platform, revolutionizing how 25 million employees across more than 6,500 companies create a better world of work. Culture Amp empowers companies of all sizes and industries to transform employee engagement, drive performance management, and develop high-performing teams. Powered by people science and the most comprehensive employee dataset in the world, the most innovative companies including Canva, On, Asana, Dolby, McDonalds and Nasdaq depend on Culture Amp every day. Culture Amp is backed by leading capital venture funds and has offices in the US, UK, Germany and Australia. Culture Amp has been recognized as one of the world’s top private cloud companies by Forbes and most innovative companies by Fast Company. For more information visit cultureamp.com.
Experience · 17 entries
All (17)
Investments (9)
Founder (3)
Board (1)
2025
Seed Investor
Feb 2025
A quantum computer harnesses the fundamental forces that govern the physical world. It can efficiently model complex systems in ways that would take the best classical computer millions of years, and so help revolutionise drug design, climate modelling, battery chemistry, and many other vital processes. But to achieve all this, we need to make quantum computers work reliably at scale. We started Universal Quantum to meet this challenge - because we believe that by doing so, we can help solve the most difficult problems faced by humanity. We’re following a pragmatic, engineering-based roadmap to build a device that is useful in the real world: a quantum computer that has utility. Every approach we take, every solution we devise, is geared towards this goal.
2024
Series A investor and observer
Jul 2024
Diraq is building quantum computers based on modified silicon transistors, the technology best suited to achieving utility scale, when value far outweighs cost. Diraq’s mission is to become the global leader in the development of utility-scale quantum computing with millions of qubits on one silicon chip. Diraq’s silicon technology is designed to be integrated into standard data centers. It runs on a single quantum chip, packaged together with classical electronics that operate at cryogenic temperatures, connected to supporting electronics at room temperature. Founded in Sydney, Australia, Diraq has operations in Sydney and Melbourne, Australia, and is expanding rapidly in the United States with operations in Palo Alto, Los Angeles, Boston, and Chicago. To learn more, please visit www.diraq.com
2018
Board Observer
Oct 2018
Gilmour Space Technologies is a leading Australian-owned company that is developing and launching LEO launch vehicles and new satellite platforms. Need to launch? Please email us for more info at: launch@gspace.com Linkedin: Gilmour Space Technologies | Facebook: GilmourSpace | Twitter: @GilmourSpace
2017
Series A investor and observer
Sep 2017
Self-driving is hard, your choice of LiDAR shouldnt be. Baraja has invented a new type of LiDAR called Spectrum-Scan™ which delivers the highest performance available to address the challenge of self-driving cars. Baraja is a rapidly growing start-up, with a revolutionary LiDAR for self-driving vehicles. Our HQ is based in Sydney, Australia, with offices in China and the USA. We are quickly expanding worldwide, hiring through Europe and Asia, closely collaborating with car manufacturers to iterate and refine our vision of what LiDAR needs to be.
Main Sequence Ventures
General Partner
Mar 2017
Show all 17 entries ↓
Investment activity
1998–2025 · 9 investments
199812015320172201812024120251
Recent (last 2 years)Earlier