Key Takeaways
- • Mariner Institutional agreed to acquire Southeastern Advisory Services, an Atlanta-based institutional consulting firm, adding approximately $5 billion in assets under advisement.
- • The deal is set to close in September 2025, according to publisher reports; one report describes it as a late-September transaction.
- • Mariner Wealth Advisors' institutional platform is being rebranded as Mariner Institutional, and Southeastern Advisory Services has officially joined the platform.
- • The Retirement Plan A board voted unanimously on August 12, 2025 to accept a consent-to-assignment allowing Mariner Institutional, LLC to assume advisory responsibilities for SEAS-managed assets.
Summary
Mariner Institutional, the institutional advisory platform of Mariner Wealth Advisors, has agreed to acquire Southeastern Advisory Services (SEAS), an institutional investment consulting firm based in Atlanta. The transaction adds about $5 billion in assets under advisement to Mariner Institutional, according to Pensions & Investments. Reports indicate the deal is set to close in September.
The acquisition is part of Mariner Wealth Advisors' institutional expansion. Publisher reports note that Mariner Wealth Advisors' roughly $104 billion in assets were used to build out the institutional business, which is being branded Mariner Institutional. Following the agreement, Southeastern Advisory Services has officially joined Mariner Institutional.
Client continuity has been addressed in at least one case. The Retirement Plan A board voted unanimously on August 12, 2025 to accept a consent-to-assignment, allowing Mariner Institutional, LLC to assume the advisory relationship for SEAS-managed assets. Mariner Institutional has stated that its goal is to become an integral extension of client teams, offering guidance and customized solutions.
The primary article otherwise focuses on defined contribution plans and the growing role of 401(k) sponsors in retirement readiness, with the deal reported within the publication's broader coverage.
The acquisition is part of Mariner Wealth Advisors' institutional expansion. Publisher reports note that Mariner Wealth Advisors' roughly $104 billion in assets were used to build out the institutional business, which is being branded Mariner Institutional. Following the agreement, Southeastern Advisory Services has officially joined Mariner Institutional.
Client continuity has been addressed in at least one case. The Retirement Plan A board voted unanimously on August 12, 2025 to accept a consent-to-assignment, allowing Mariner Institutional, LLC to assume the advisory relationship for SEAS-managed assets. Mariner Institutional has stated that its goal is to become an integral extension of client teams, offering guidance and customized solutions.
The primary article otherwise focuses on defined contribution plans and the growing role of 401(k) sponsors in retirement readiness, with the deal reported within the publication's broader coverage.
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