Charles Miller
Principal at O2 Investment Partners
Detroit, Michigan
Charles Miller, Principal at O2 Investment Partners is an active investor based in Detroit, Michigan. This profile covers what Charles Miller backs, at which stage, and how founders can reach out in 2026.
- Investor type
- VCPE
- Stages
- SeedSeries ASeries BLate Stage Venture
- Invests in
- SaaS & EnterpriseManufacturing & IndustrialSupply Chain & Logistics
- Location
- Detroit, Michigan
- Typical check
- $2M
- Past investments
- 8
Notable investments
SIB Fixed Cost Reduction
National Technologies
IROA Technologies LLC
Vessco, Inc.1 Priority Environmental Services
Flip Electronics
EMEX
Fairhaven Integration ServicesHow to reach Charles Miller
Angels and operators like Charles Miller reply to specific, personalized notes that show real traction, not mass blasts. Build a verified list, write a note that fits their thesis, and track replies, all on Round Funded.
Reach active investors like this one
About this profile
This profile is part of Round Funded, an investor database and outreach platform for founders. It covers 60,000+ active VCs, angels, family offices and accelerators with verified contacts, lets you send pitches from your own Gmail, and includes a free Data Room for your raise. How this data is built.
Cite this page
Round Funded. "Charles Miller." Round Funded investor database, updated September 9, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/charles-miller
Frequently Asked Questions
What does Charles Miller invest in?
Charles Miller invests in SaaS & Enterprise, Manufacturing & Industrial and Supply Chain & Logistics, typically at Seed, Series A, Series B and Late Stage Venture. Match your sector and stage, then reach out with a personalized pitch.
What stage does Charles Miller invest at?
Charles Miller typically invests at Seed, Series A, Series B and Late Stage Venture. Lead with traction that fits the stage when you reach out.
What is Charles Miller's typical check size?
Charles Miller typically writes checks around $2M. 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.