Collective 54 adds Mariner to partner program for founder exits

Collective 54 has added Mariner to its Ecosystem Partner Program to give members sell-side M&A support as AI-native professional services founders prepare for exits. The partnership connects boutique firm owners across North America with investment banking expertise aimed at maximizing value and improving deal outcomes.

Why it matters: - Collective 54 members are building firms where the exit is often the biggest financial event in the founder’s career. - Mariner’s addition gives those founders direct access to sell-side M&A advisory support for a sale that can determine whether years of work pay off. - The partnership is aimed at founders of boutique professional services firms that want a better buyer fit, stronger terms and higher transaction value.

What happened: - Collective 54 announced that Mariner is the newest member of its Ecosystem Partner Program. - The announcement was made June 11, 2026, in Dallas. - Collective 54 serves founders building AI-native professional services firms in North America. - Mariner will provide investment banking expertise focused on exits for Collective 54 members.

The details: - Collective 54 is built for founders of boutique professional services firms with $5 million to $100 million in revenue. - The community includes firms in consulting, IT services, marketing agencies, accounting and finance, legal services, architectural and engineering services, design and software development. - Collective 54 says members have completed 60 firm sales representing more than $3.5 billion in transactions across North America. - Mariner has operated as a middle-market M&A advisory firm since 1993. - Mariner, formerly Woodbridge International, says it has closed more than $2 billion in client transactions over the past five years. - Mariner uses a structured auction process backed by a proprietary database of more than 450,000 buyers worldwide. - Members who work with Mariner will get support from an investment bank focused on running the sale process and improving the outcome. - Collective 54 says its community is designed to help members make more money, make scaling easier and make an exit achievable. - The group says it helps founders build AI-native firms that rely less on billable hours and headcount.

Between the lines: - The partnership links a niche founder community with an advisor built for a single high-stakes transaction: the sale of a firm. - Collective 54 is positioning exits as a core part of its value proposition, not just an end-stage event. - Mariner is pitching early preparation and process discipline as the difference between leaving value on the table and maximizing a sale. - The fit suggests both groups see growing buyer demand for firms that are already reengineering how they deliver services.

What’s next: - Collective 54 members can now engage Mariner through the partner ecosystem when they begin planning a sale. - Mariner plans to help members prepare early and exit on terms that match their goals. - Collective 54 will keep expanding the curated ecosystem of services available to its founder members.

The bottom line: - The deal gives AI-native professional services founders a new path to prepare for, price and execute an exit with more specialized M&A support.