Venture Capital

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Calumet Venture Fund

Calumet Venture Fund deploys early-stage and expansion capital into Upper Midwest startups from its base in Madison, Wisconsin.

Calumet Venture Fund

Calumet Venture Fund was founded by Tim Williams and Judy Owen to fund early-stage companies with innovative products. The fund has made 10 investments, including a Series C - II investment in OptiMine on January 08, 2015. Calumet Venture Fund has one portfolio exit, OptiMine, which occurred on August 28, 2025.

General information

Firm type

Venture Capital

Year founded

AUM

Undisclosed

Location

Region

North America

Country

United States

City

Madison

Corporate office

Madison, WI, United States

Frequently asked questions

What investment stages does Calumet Venture Fund target?

The firm executes deals from early-stage seed rounds through expansion and late-stage financings. This stage-agnostic approach allows it to follow successful portfolio companies across their growth lifecycle and maintain ownership positions through multiple funding rounds.

How does Calumet Venture Fund source proprietary deal flow?

Calumet sources through the Upper Midwest ecosystem, leveraging proximity to the University of Wisconsin, regional accelerators, and industrial networks in the Great Lakes manufacturing corridor. The firm's local presence provides access to startups that often fall outside the funnel of coastal venture firms.

What sectors does Calumet Venture Fund focus on?

The fund targets technology, life sciences, and advanced manufacturing, sectors that draw on the R&D infrastructure and talent base concentrated in the Madison and broader Wisconsin ecosystem. Specific allocations across these sectors are not publicly disclosed.

Does Calumet Venture Fund participate in fund commitments or only direct deals?

Public records confirm direct equity, convertible note, and structured growth financing activity. There is no public evidence of fund-of-funds commitments or LP investments into other venture vehicles. The firm's mandate appears focused on direct company investments.

Who runs investment decisions at Calumet Venture Fund?

The principals and investment committee are not publicly identified. The firm does not maintain a public-facing website with biographies, and no named investment leads appear in available public records or regulatory filings as of the latest review.

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