Carl Williams
Co-Founder and Partner at Sandbrook Capital
Houston, Texas
Carl Williams, Co-Founder and Partner at Sandbrook Capital is an active investor based in Houston, Texas. This profile covers what Carl Williams backs, at which stage, and how founders can reach out in 2026.
- Investor type
- AngelPE
- Stages
- Pre SeedSeedSeries BLate Stage Venture
- Invests in
- Climate & Energy
- Location
- Houston, Texas
- Typical check
- $1.6M
- Past investments
- 11
Notable investments
How to reach Carl Williams
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About this profile
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Cite this page
Round Funded. "Carl Williams." Round Funded investor database, updated September 9, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/carl-williams
Frequently Asked Questions
What does Carl Williams invest in?
Carl Williams invests in Climate & Energy, typically at Pre Seed, Seed, Series B and Late Stage Venture. Match your sector and stage, then reach out with a personalized pitch.
What stage does Carl Williams invest at?
Carl Williams typically invests at Pre Seed, Seed, Series B and Late Stage Venture. Lead with traction that fits the stage when you reach out.
What is Carl Williams's typical check size?
Carl Williams typically writes checks around $1.6M. Use it as a signal for whether your raise fits their stage.
How do founders reach investors like this?
Round Funded lists active investors with verified, professional contact details for signed-up founders. Filter by sector, stage and location, then send a personalized pitch from your own inbox.
What is Round Funded?
Round Funded is an investor database and outreach platform for startup founders. It lists 60,000+ active investors with verified contacts, filtered to recent investment activity, and lets founders send personalized pitches from their own Gmail, track replies, and share a free Data Room. Round+ starts at $99 per month with a 3-day trial.