William L. Hadden
Professional summary
William Leo Hadden III, who also goes by William L III Hadden, is a registered financial advisor currently at STIFEL, NICOLAUS & COMPANY, INCORPORATED located in Enfield, Connecticut.
William is registered as an IAR (Investment Advisor Representative) and RR (Registered Representative) and started their career in finance in 1982. William has worked at 5 firms and has passed the Series 66, Series 63, SIE, Series 3, Series 5, Series 7, Series 6, Series 9 and Series 10 exams.
Question & Answer
Aliases
Other business activities
CRS (Client Relationship Summary) - RIA
Click below to view William Leo Hadden III's CRS (Customer Relationship Summary).
CRS (Client Relationship Summary) - BD
Click below to view William Leo Hadden III's CRS (Customer Relationship Summary).
Certified licenses
Experience
June 23, 2008 - Present
STIFEL, NICOLAUS & COMPANY, INCORPORATED
Office #1: 1699 King Street Suite 401, Enfield, CT 06082Office #2: 647 Depot Street, Manchester Center, VT 05255June 23, 2008 - Present
STIFEL, NICOLAUS & COMPANY, INCORPORATED
Office #1: 1699 King Street Suite 401, Enfield, CT 06082Office #2: 647 Depot Street, Manchester Center, VT 05255February 10, 2005 - July 10, 2008
RBC CAPITAL MARKETS, LLC
March 9, 2002 - July 10, 2008
RBC CAPITAL MARKETS, LLC
March 3, 1986 - March 9, 2002
TUCKER ANTHONY INCORPORATED
January 25, 1984 - March 7, 1986
DREXEL BURNHAM LAMBERT INCORPORATED
November 24, 1982 - March 16, 1984
SECURITIES MANAGEMENT & RESEARCH, INC.
Primary Firm SEC Registration

STIFEL, NICOLAUS & COMPANY, INCORPORATED
CRD#: 793 / SEC#: 801-10746, 8-1447
State Registrations and Notice Filings
Listed states reflect where the advisor is authorized to serve clients under state regulations.
Visual representation of state registrations
(3/15/2024)
(1/2/2024)
(12/1/2022)
(8/18/2017)
(6/23/2008)
(6/23/2008)
(6/23/2008)
(6/23/2008)
(6/23/2008)
(4/1/2024)
(5/17/2024)
(2/19/2019)
(9/8/2016)
(12/17/2014)
(6/23/2008)
(6/23/2008)
(8/9/2018)
(6/21/2022)
(6/23/2008)
(6/23/2008)
(9/23/2020)
(6/23/2008)
(1/4/2017)
(6/23/2008)
(6/23/2008)
(6/23/2008)
(6/23/2008)
(4/28/2017)
(6/23/2008)
(9/6/2019)
(7/7/2008)
(7/7/2008)
(4/6/2022)
(9/13/2012)
(11/18/2024)
Exams
Series 5
Date: 2/3/1984
Interest Rate Options ExaminationFINRA
NYSE American LLC
Nasdaq PHLX LLC
Nasdaq Stock Market
New York Stock Exchange
Current Firm

STIFEL, NICOLAUS & COMPANY, INCORPORATED
CRD#: 793 / SEC#: 801-10746, 8-1447
Contact information
SEC notice filing (52 States and Territories)
FINRA licenses (53 States and Territories)
Documents
Direct owners and executive officers
| Name | Position | CRD# |
|---|---|---|
| STIFEL FINANCIAL CORP. | SHAREHOLDER | |
| AYD, PAUL JOSEPH | CHIEF COMPLIANCE OFFICER - CAPITAL MARKETS | 2963853 |
| BRIGHT, GEOFFREY CLYDE JR | CHIEF COMPLIANCE OFFICER - PRIVATE CLIENT GROUP | 4696103 |
| BROOKS, PATRICK RODGERS | ROSFP - CAPITAL MARKETS | 2223412 |
| DODSON, CHARLES EDWARD | CCO ADVISORY SERVICES | 1744430 |
| FISHER, MARK PHILIP | GENERAL COUNSEL, SECRETARY | 4970942 |
| HYDE, GINA ELIZABETH | CHIEF COMPLIANCE OFFICER - CAPITAL MARKETS | 2812751 |
| KRUSZEWSKI, RONALD JAMES | PRESIDENT, CHIEF EXECUTIVE OFFICE & CHAIRMAN OF THE BOARD | 1434827 |
| MELINGER, ADAM SCOTT | ROSFP - PCG | 2373020 |
| NOLL, DOUGLAS WAYNE | PRINCIPAL OPERATIONS OFFICER | 1614129 |
| RAYMOND, CHARLES BRADFORD GREEN | CO-HEAD GLOBAL INSTITUTIONAL EQUITIES & ADVISORY | 2796106 |
| SCHRICK, FREDERICK RICHARD | PRINCIPAL FINANCIAL OFFICER | 5636488 |
| SLINEY, DAVID DEAN | SENIOR VICE PRESIDENT & DIRECTOR | 2276514 |
| ZEMLYAK, JAMES MARK | EXECUTIVE VICE PRESIDENT & DIRECTOR | 1586132 |
Regulatory assets under management
| Total Number of Accounts | 368,405 |
| AUM (Assets Under Management) | $ 171,209,609,487 |
Disclosures
| Regulatory Event | 168 |
| Civil Event | 2 |
| Arbitration | 60 |
| Bond | 2 |
Accountant surprise examination report
| Filing Date | Form ADV-E Cover | Form ADV-E Report |
|---|---|---|
| 12/18/2024 | ||
| 12/19/2023 |
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.
