Mark Rieth
Angel investor in Detroit
Detroit, Michigan
Mark Rieth, Angel investor in Detroit is an active investor based in Detroit, Michigan. This profile covers what Mark Rieth backs, at which stage, and how founders can reach out in 2026.
Mr. Mark Rieth is the Founder, Owner & serves as Chief Executive Officer at Detroit Liquid Ventures. Mr. Rieth is an Angel Investor. He served as Chief Executive Officer and President at Atwater Brewery. He is a graduate of Michigan State University, personally invested in the brewery in 2002, and purchased the brewery outright in 2005. His background and passion for beer took off when he lived in Boston, MA in the late 80's. He was brewing his own Sam Adams Boston Lager knock-offs right out of his basement and sharing it at parties. With an automotive background, he already had a strong understanding of the three-tier system of production from distributor to consumer. He moved back to Detroit in 1997 with the intent to be a part of bringing Detroit back and stumbled across Atwater. He purchased the brewery outright in 2005 and exponential growth soon followed. Dirty Blonde and Vanilla Java Porter quickly became front runners in the Michigan market, along with Hop-a-Peel, an American IPA, and the Bronze World Beer Cup Winner, Decadent Dark Chocolate. Atwater expanded distribution on the East Coast soon after and has had great success.
- Investor type
- Angel
- Stages
- Pre SeedSeed
- Invests in
- SaaS & EnterpriseConsumer & RetailConsumer Goods (CPG)E-commerce & D2CManufacturing & Industrial
- Location
- Detroit, Michigan
- Typical check
- $150K
How to reach Mark Rieth
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Cite this page
Round Funded. "Mark Rieth." Round Funded investor database, updated September 8, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/mark-rieth
Frequently Asked Questions
What does Mark Rieth invest in?
Mark Rieth invests in SaaS & Enterprise, Consumer & Retail, Consumer Goods (CPG) and E-commerce & D2C, typically at Pre Seed and Seed. Match your sector and stage, then reach out with a personalized pitch.
What stage does Mark Rieth invest at?
Mark Rieth typically invests at Pre Seed and Seed. Lead with traction that fits the stage when you reach out.
What is Mark Rieth's typical check size?
Mark Rieth typically writes checks around $150K. 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?
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