Continuum Ventures Acquires Majority Stake in Walstrom Marine

Walstrom Marine Acquires Grand Bay Marine

November 15, 2023

Retail

Walstrom Marine has acquired Grand Bay Marine, a Michigan-based full-service boat dealership with locations in Traverse City and Charlevoix. The seller, Liz Carney and her family, will assist with the transition while Grand Bay's 38 employees remain; the deal expands Walstrom's footprint across the Great Lakes and adds the Regal brand to its portfolio. The investor group led by Continuum Ventures (the DeVos family office) — which previously invested in Walstrom — will own Grand Bay through their stake in Walstrom.

Walstrom Marine Acquires Algonac Harbour Club

July 21, 2023

Transportation

Walstrom Marine has acquired Algonac Harbour Club, a family-owned full-service marina on the St. Clair River in Algonac, Michigan. The investor group led by Continuum Ventures (the DeVos family office) — which previously invested in Walstrom Marine — and several family investors will own the marina; founder Peter Beauregard Sr. will serve as a consultant and Pete Beauregard Jr. will retain an ownership stake.

Continuum Ventures Acquires Majority Stake in Action Water Sports

March 13, 2023

Retail

Continuum Ventures, the investment arm of the Doug and Maria DeVos family, has acquired a majority stake in Action Water Sports, a four-location premium boat dealership headquartered in Hudsonville, Michigan. Founder Jerry Brouwer will remain as a partner and president as Continuum integrates Action into its growing marine platform to expand its dealer, service, and marina footprint.

MarineMax Acquires Nisswa Marine

July 1, 2021

Retail

MarineMax, Inc. acquired Nisswa Marine, a full-service Midwest boat dealer headquartered in Nisswa, Minnesota, strengthening its storage and service offerings in the region. Nisswa generated over $35 million in revenue in 2020 and will continue to be operated by the Wiczek family leadership team under MarineMax ownership.

Thomas Capital-Led Group Acquires Marine Supply of Winter Haven

August 18, 2025

Retail

Marine Supply of Winter Haven, a longstanding local marine supply retailer, was acquired by a group of local investors led by John Saterbo, Tom Kersting, and Jeff Donalson of Thomas Capital. The sellers, founders Richard Emry and Tricia Gurr, are exiting as they approach retirement; the new owners plan to preserve operations, retain staff, and invest in the property's amenities and lakeside experience.

TopSide Marinas Acquires Bay Marine Marinas in Waukegan and Sturgeon Bay

May 30, 2024

Real Estate

TopSide Marinas has acquired two Lake Michigan marinas — Bay Marine of Chicago (Waukegan, IL) and Bay Marine of Sturgeon Bay (Sturgeon Bay, WI). The previous owners, Matt and Mark Felhofer, will continue to own and operate Bay Marine Yacht Sales and will lease back showroom and office space at both locations as TopSide expands its Great Lakes footprint.