Mercer Advisors Appoints Lindsay O’Toole to Lead Investment Platform Operations

Veteran investment leader brings decades of experience to advance Mercer Advisors’ commitment to deliver institutional-grade investing to all clients

DENVER--(BUSINESS WIRE)--Mercer Global Advisors, Inc. (“Mercer Advisors”), a national Registered Investment Adviser (RIA), today announced the appointment of Lindsay O’Toole as Senior Vice President, Investment Platform Operations. In this role, O’Toole is responsible for leading 90+ dedicated professionals who support advisory teams in delivering customized, institutional-grade investing programs for each of the firm’s more than 39,900+ families. She is charged with working closely with Mercer Advisors’ Investment Committee, and Chief Investment Officer Don Calcagni, to continue to evolve the investment platform—and streamline day-to-day investing experiences for clients and advisory teams.

O’Toole joins Mercer Advisors after spending more than 17 years at LPL Financial (“LPL”), where she most recently served as senior vice president of trading. In this capacity, she led trading and trading operations for its 30,000 advisors and was part of a team that contributed to exponential growth of the firm's advisory platforms. O’Toole was also instrumental in layering technology and process redesign to ensure best trade execution, supporting the addition and launch of new investment solutions. Prior to LPL, O’Toole was in trading operations at Merrill Lynch for several years.

“One of the central promises of our firm is institutional-grade investing for each client’s personalized portfolio, anchored in their unique financial plan. Our investing platform is built to bridge the highly bespoke needs of each client family—with the institutional scale and capabilities of a $90B+ investing platform.” said Daniel Gourvitch, President at Mercer Advisors. “Lindsay brings a rare combination of experience scaling investment capabilities and a deeply collaborative leadership style. She has a proven ability to work shoulder to shoulder with advisors to strengthen high-performing teams united by a shared commitment to exceptional client outcomes. Her passion for supporting advisors—and her track record of fostering cultures rooted in trust, care, and excellence—make her a dynamic addition to Mercer Advisors and the families we serve.”

“My career to date has been defined by a passion for ensuring client outcomes surpass expectations, and that’s what excites me most about joining a firm like Mercer Advisors. It has people, platform, and processes that I believe are nothing short of world-class,” said O’Toole. “Our industry talks about delivering sophistication at scale, but to see it in action—and now be part of making family office services and institutional investing accessible to every client—is incredibly compelling to me. I’m especially looking forward to continuing to elevate efficiency across teams and upgrading systems and workflows so our advisors can spend more time focused on the complex needs of the families they serve.”

As part of its commitment to institutional-grade investing, Mercer Advisors seeks to deliver to every family the same level of rigor, discipline, and execution as the world’s most sophisticated investors, which requires ongoing investment in people, technology, and operational best practices.

“A key element of our fiduciary commitment to clients is to ensure the absolute best execution possible of our Investment Committee’s decisions in a rapidly changing financial services landscape,” said CIO Calcagni. “That standard is only achievable when our trading and investment operations work with the technology that powers our platform—which helps ensure precision, transparency, and outcomes fully aligned with our fiduciary responsibility. Lindsay is a leader who understands that as markets evolve and client expectations rise, our team must relentlessly refine and improve their processes, elevate their service models, and embrace innovation.”

About Mercer Advisors

Mercer Advisors was named the #1 ranked RIA firm in the nation for two years in a row according to Barron’s 2025 and 2024 Top 100 Registered Investment Advisor Firms. Founded in 1985, Mercer Advisors has been trusted to help families amplify and simplify their financial lives. The company offers comprehensive, fee-based family office services, including financial planning, estate and tax planning, insurance solutions, and corporate trustee and trust administration services. Mercer Advisors is majority owned by Oak Hill Capital, Genstar Capital, and Altas Partners. Mercer Global Advisors Inc. is headquartered in Denver, Colorado, is privately held, has over 1,500 employees, and operates nationally through more than 110 locations. Mercer Advisors has $96 billion in client assets. For more information, visit merceradvisors.com and merceradvisors.com/partnerwithus.

Important Information

Company statistics as of December 31, 2025. Client assets refers to client assets under management (AUM) and client assets under advisement (AUA) as well as assets gained from recent acquisitions where the advisory agreements have been properly assigned to Mercer Global Advisors, but the custodial accounts have yet to be transferred and/or the accounts have yet to be migrated to Mercer Global Advisors’ portfolio management system.

“Mercer Advisors” is a brand name used by several affiliated legal entities owned by Mercer Advisors, Inc., including, Mercer Global Advisors, Inc., an SEC registered investment adviser providing investment advisory and family office services; Mercer Advisors Private Asset Management, Inc., an SEC registered investment adviser providing discretionary investment management services to affiliated private funds; Mercer Advisors Tax Services LLC, a tax services and accounting firm; Heim, Young and Associates, Inc., (MA Brokerage Solutions) a broker/dealer, member FINRA/SIPC; and Mercer Advisors Insurance Services LLC, (MAIS) an insurance agency.

Mercer Advisors is not a law firm and does not provide legal advice to clients. All Estate planning document preparation and other legal advice are provided through select third parties, with which Mercer Advisors has a contractual relationship. Mercer Advisors Tax Services, LLC, does not provide financial audit, assurance, compilations, or forensic accounting services. Each individual tax situation is unique, depending on complexity, additional fees may apply. Insurance products are provided by Mercer Advisors Insurance Services, LLC (MAIS), which places individual life, disability, long term care coverage, and property and casualty coverage through select insurance companies. Trustee services are offered through select third parties with which a client would sign an additional agreement, and additional fees may apply.

2025 and 2024 - Barron’s Top 100 RIA methodology

Mercer Advisors was ranked #1 for non-mega RIA firms. Advisers who wish to be ranked fill out a 100+ question survey about their practice. Barron's verifies that data with regulatory databases and then Barron's applies their rankings formula to the data to generate a ranking. The formula features three major categories of calculations: (1) Assets (2) Revenue (3) Quality of practice. In each of those categories Barron's does multiple sub calculations including asset type, growth, client retention, technology spending, succession planning, diversity of their teams, charitable and philanthropic work and compliance records. No fee was paid for participation in the ranking, however, Mercer Advisors has paid a fee to Barron's to use the ranking in marketing.

Please Note: Limitations. Neither rankings and/or recognitions by unaffiliated rating services, publications, media, or other organizations, nor the achievement of any professional designation, certification, degree, or license, membership in any professional organization, or any amount of prior experience or success, should be construed by a client or prospective client as a guarantee that they will experience a certain level of results if Mercer Advisors or its investment professionals are engaged, or continues to be engaged, to provide investment advisory services. A fee was not paid by either Mercer Advisors or its investment professionals to receive the award or ranking. The award or ranking is based upon specific criteria and methodology. No ranking or recognition should be construed as an endorsement by any past or current client of Mercer Advisors or its investment professionals.