Shaun Abrahamson co-founded Third Sphere to support climate-focused startups. He previously invested in over 20 firms and led sustainability projects, drawing on experience from companies like MediaSentry and Starmedia Network.
What Shaun can write
Third Sphere writes $250K to $1M checks, larger than 33% of firms in the atlas.
Bars: how many firms report each check band. Highlighted: Third Sphere.Career
- govWorks
- Oculus
- Third Sphere · Co-FounderNow
- MIT CADLab1997
- govWorks
- MediaSentry
- Starmedia Network
- Oculus
Companies founded
Investments named in public bios
Focus
Education
Also at Third Sphere
Partners like Shaun
At firms with a similar stage, sector and check size.
Alert me when Third Sphere is active
One email when Shaun's firm raises a fund, adds a partner or shows new activity.
Send Mode VC your deck
Raising a pre-seed or seed round? We write $1M to $5M first checks and help founders with distribution. A partner reads every deck.
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Who is Shaun Abrahamson?
Shaun Abrahamson co-founded Third Sphere to support climate-focused startups. He previously invested in over 20 firms and led sustainability projects, drawing on experience from companies like MediaSentry and Starmedia Network.
How much does Shaun Abrahamson invest?
Shaun Abrahamson invests through Third Sphere, which writes checks of $250K to $1M at pre-seed, seed.
How do I pitch Shaun Abrahamson?
A warm intro from a founder Third Sphere backed works best. A short LinkedIn note with one line on traction is the next best route.
What did Shaun Abrahamson do before Third Sphere?
govWorks; Oculus; MIT CADLab; govWorks; MediaSentry; Starmedia Network; Oculus.
Last updated 2026-10-15. Is this you? Ask for a correction.