William Blair & Company
47yrs
Top advisor by experience in Illinois
28yrs
Mark O'Donnell has worked in the financial industry for 28 years and is a fiduciary financial advisor based in Chicago, Illinois. After two years at Morgan Stanley & Co. and two years at Morgan Stanley DW, Mark joined Morgan Stanley in 2009, a firm offering financial planning, investment management, and retirement plan consulting. Morgan Stanley reports being paid through a percentage of assets, flat fees, and commissions.
One of 6312 advisors with offices in Chicago, and one of 5878 fiduciaries.
At a glance
Experience28 years (since 1999)
How that compares ?Top 18% by experience in Chicago
Office233 South Wacker Drive Suite 8600, Chicago, IL 60606
FirmMorgan Stanley
How the firm is paid ?Percent of assets, Flat fee, Commissions, Performance fee, Other
Typical client at the firm ?$670,481
Advisors at the firm23,156
States licensed ?2 states
Services through Morgan Stanley
Financial planningInvestment management for individuals and small businessesManaging mutual fundsInvestment management for businesses and institutionsRetirement plan consultingChoosing other investment managersEducational seminars and workshopsOther services
Specialties, designations like CFP®, and languages spoken appear here when advisors claim their profiles.
Licenses
Exams passed, from the official record. Tap a license to see what it allows.
Career
- 2009 – nowMorgan StanleyCurrent firm
- 2007 – 2009Morgan Stanley & Co. LLCPreviously
- Jul 2005 – Apr 2007Morgan Stanley DW Inc.Previously
- Apr 2004 – Jul 2005VAN Kampen Advisors Inc.Previously
Contact Mark
(914) 225-5510Firm headquarters in Purchase, NY. Ask for Mark. 233 South Wacker Drive Suite 8600Chicago, IL 60606Office · Get directions Firm websiteHTTP://WWW.MORGANSTANLEY.COM
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Questions to ask Mark
Tailored to Mark’s registration and firm.
- What's your succession plan, and who would work with me if you retire?
- At a firm this size, will I work with you directly or with a service team?
- Your firm can charge performance-based fees. Would that apply to me?
- What does a financial plan with you include, and how often is it updated?
- If you use outside managers, how are they chosen and what do they cost on top of your fee?
- Where would my money be held, and will I get statements directly from that firm?
My notes and scorecard
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About Mark
How do I contact Mark?
Call Morgan Stanley at (914) 225-5510 and ask for Mark O'Donnell. Mark works from the Chicago, IL office.
How long has Mark been a financial advisor?
Mark has been in the industry since 1999, about 28 years. Top 18% by experience in Chicago.
What licenses does Mark hold?
Series 63, Series 65. Tap any license on this page to see what it allows.
Is Mark a fiduciary?
Mark is registered as an investment advisor representative, which carries a fiduciary duty when giving investment advice.
How is Mark paid?
Morgan Stanley reports being paid by a percentage of the assets they manage, flat or fixed fees, commissions on some products, a share of investment gains, other fees. Ask Mark for your total yearly cost in dollars.
Official record as of October 3, 2026.
This profile is for information only and is not financial advice or a recommendation.
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