BQ
Brendan T. Quinn
WILLIAM BLAIR
New York, NY 10036-2774
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CRD#: 4814087
BQ
Professional summary
Brendan Thomas Quinn is a registered financial professional currently at WILLIAM BLAIR located in New York, New York.
Brendan is registered as a RR (Registered Representative) and started their career in finance in 2005. Brendan has worked at 3 firms and has passed the Series 63, Series 57TO, SIE, Series 55, Series 3, Series 7 and Series 24 exams.
Question & Answer
Are you a "fiduciary"?
No
Aliases
None
Other business activities
Outside business activity is any business or activity undertaken by an advisor that is outside the scope of their relationship with their firm (e.g., consulting services, real estate, freelance work, teaching, etc.). Investors should stay informed about these activities to ensure no conflicts of interest.
The advisor shows no other business activity.
CRS (Client Relationship Summary) - BD
Click below to view Brendan Thomas Quinn's CRS (Customer Relationship Summary).
Certified licenses
Advisors may have various certifications and credentials from different organizations. AdvisorCheck highlights these seven certifications - AIF®, CFP®, ChFC®, CFA, CLU®, CIMA®, CPWA®
NoneExperience
Current
June 23, 2025 - Present
WILLIAM BLAIR
Office #1: 1166 Avenue Of The Americas Floor 20, New York, NY 10036-2774RIA
BD
CRD#: 1252
New York, NY
Past
September 29, 2023 - July 1, 2025
UBS SECURITIES LLC
BD
CRD#: 7654
NEW YORK, NY
Past
September 21, 2005 - September 29, 2023
CREDIT SUISSE SECURITIES (USA) LLC
BD
CRD#: 816
NEW YORK, NY
Primary Firm SEC Registration
This SEC-registered firm can serve clients nationwide. Some states may require the firm to submit a notice filing if the firm has more than 5 clients or a physical office there. You can view these state-level filings under the section titled "State Registrations and Notice Filings".
WILLIAM BLAIR
WILLIAM BLAIR | WILLIAM BLAIR & COMPANY L.L.C. | WILLIAM BLAIR & COMPANY
CRD#: 1252 / SEC#: 801-688, 8-2698
RIA
Registered Investment Advisory firm - SEC (12/24/1947 Approved)BD
Broker-Dealer Firm Regulated by FINRA (Chicago district office)
State Registrations and Notice Filings
Listed states reflect where the advisor is authorized to serve clients under state regulations.
RR
indicates the advisor is registered as a Registered Representative in this state, allowing them to offer securities such as stocks, bonds, and mutual funds through a broker-dealer.Visual representation of state registrations
RR
Illinois(6/23/2025)
RR
New York(6/23/2025)
Exams
State Security Law Exam
General Industry/Product Exam
RR
Series 57TO
Date: 1/2/2023
Securities Trader ExamGeneral Industry/Product Exam
General Industry/Product Exam
RR
Series 55
Date: 10/17/2005
Limited Representative-Equity Trader ExamGeneral Industry/Product Exam
General Industry/Product Exam
Principal/Supervisory Exam
SRO Registrations
RR
FINRA
SRO Registrations
RR
NYSE American LLC
SRO Registrations
RR
NYSE Texas, Inc.
SRO Registrations
RR
Nasdaq Stock Market
SRO Registrations
RR
New York Stock Exchange
Current Firm
WILLIAM BLAIR
WILLIAM BLAIR | WILLIAM BLAIR & COMPANY L.L.C. | WILLIAM BLAIR & COMPANY
CRD#: 1252 / SEC#: 801-688, 8-2698
RIA
Registered Investment Advisory firm - SEC (12/24/1947 Approved)BD
Broker-Dealer Firm Regulated by FINRA (Chicago district office)
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Contact information
Main Address
The William Blair Building 150 North Riverside, Chicago, IL 60606
Mailing Address
The William Blair Building 150 North Riverside, Chicago, IL 60606-1594
Phone number
(312) 236-1600
Established
Delaware since 10/30/1995
Firm type
Limited Liability Company
Fiscal year end
December
Firm Size
Large
# of Employees
469
SEC notice filing (53 States and Territories)
FINRA licenses (53 States and Territories)
Documents
Direct owners and executive officers
| Name | Position | CRD# |
|---|---|---|
| WBC HOLDINGS, L.P. | HOLDING COMPANY | |
| CITARDI, CISSIE | EXECUTIVE COMMITTEE, GENERAL COUNSEL | 6642613 |
| DEVORE, RYAN JACOB | EXECUTIVE COMMITTEE | 3049671 |
| DUWA, ROBERT J | EXECUTIVE COMMITTEE | 2931296 |
| GLEDHILL, BRENT WALKER | PRESIDENT, CEO | 2921069 |
| MCLAUGHLIN, SCOTT THOMAS | EXECUTIVE COMMITTEE | 2481285 |
| QUINN, MICHAEL PATRICK | EXECUTIVE COMMITTEE | 3257072 |
| RASAVONGXAY, WILLSON B | CHIEF COMPLIANCE OFFICER | 6593731 |
| SATTERFIELD, BETH A | EXECUTIVE COMMITTEE | 6011858 |
| TOLE, STEVEN ROBERT | EXECUTIVE COMMITTEE | 5885283 |
| TRIMBERGER, MICHAEL WILLIAM | CFO | 5329834 |
| ZIMMER, MATTHEW MONTGOMERY | EXECUTIVE COMMITTEE | 4157826 |
Regulatory assets under management
| Total Number of Accounts | 37,973 |
| AUM (Assets Under Management) | $ 58,329,726,421 |
Disclosures
| Regulatory Event | 29 |
| Arbitration | 2 |
| Bond | 1 |
Red Flags
Disclosures can be potential red flags, including customer disputes, regulatory fines, employer terminations, bankruptcies, judgments, liens, or certain criminal activities.
Check for any disclosures as part of your thorough research when choosing an advisor.
