The Mather Group CEO Jennifer des Groseilliers Named Finalist for ThinkAdvisor 2026 Luminaries CEO of the Year

Recognition reflects des Groseilliers’ leadership in strengthening TMG’s foundation for sustainable growth while expanding the firm’s capabilities and national presence.

CHICAGO--(BUSINESS WIRE)--The Mather Group, LLC (TMG), a $17 billion leading wealth management firm serving high-net-worth individuals and families nationwide, today announced that CEO Jennifer des Groseilliers has been named a finalist for CEO of the Year in the RIAs – More Than $10 Billion AUM/AUA category at the 2026 ThinkAdvisor Luminaries Awards.

Now in its sixth year, the ThinkAdvisor Luminaries Awards recognize firms and individuals across financial services demonstrating exemplary leadership, innovation, and impact. Des Groseilliers’ recognition follows a period of significant transformation at TMG. As CEO, she has strengthened the firm’s executive leadership, bringing key areas of the business together under a strategy designed to support sustainable growth while reinforcing TMG’s collaborative, client-first culture.

“One of the most important responsibilities of a CEO is making decisions today that put the organization in a stronger position for years to come,” said Jennifer des Groseilliers, CEO of The Mather Group. “For TMG, that has meant strengthening our leadership team, sharpening how we communicate who we are, and creating a more deliberate approach to growth and partnerships. We’ve made tremendous progress, but we’ve done it while staying grounded in the client-first culture that has always defined this firm. It’s an honor to have the work our team has done recognized by ThinkAdvisor and to be named alongside so many accomplished leaders across our industry.”

A central focus of des Groseilliers’ leadership has been strengthening TMG’s strategic partnership strategy. Over the past 18 months, the firm has completed five RIA partnerships across California, Oregon, New Jersey, and Illinois, expanding its national presence and specialized capabilities for business owners and high-net-worth families. Each partnership was selected for its planning-first philosophy, cultural alignment, and commitment to client service.

This disciplined approach to growth reinforces TMG’s Why-Powered Wealth Management model, which helps clients connect their financial decisions with their goals, values, and aspirations through integrated financial planning, investment management, tax strategy, and estate planning.

Jennifer’s recognition builds on broader recognition across TMG’s senior leadership team, including Chief Marketing Officer Deana Lewis being named a finalist for Chief Marketing Officer of the Year at the 2026 WealthManagement.com Industry Awards.

Winners of the 2026 ThinkAdvisor Luminaries Awards will be selected by an independent judging panel and announced at the ThinkAdvisor Luminaries Awards ceremony on December 3, 2026, in New York City.

About The Mather Group, LLC

The Mather Group (TMG) is a purpose-driven, fee-only investment advisory firm headquartered in Chicago, with 14 offices nationwide. TMG serves high-net-worth individuals and families across the country with an unwavering commitment to Why-Powered Wealth Management, a personalized, values-aligned approach that helps clients live with clarity, confidence, and purpose.

TMG is committed to putting clients first, offering integrated solutions that include financial planning, investment management, tax strategy, and estate planning. Every strategy is delivered through a collaborative, team-based model designed to align each client’s wealth with what matters most to them.

The Mather Group, LLC (TMG) is registered under the Investment Advisers Act of 1940 as a Registered Investment Adviser with the Securities and Exchange Commission (SEC). Registration as an investment adviser does not imply a certain level of skill or training. For a detailed discussion of TMG and its investment advisory services and fees, see the firm’s Form ADV on file with the SEC at www.adviserinfo.sec.gov, or on the firm’s website at www.themathergroup.com.