William J. Dion
Professional summary
William James Dion, CFP®, who also goes by Bill Dion, is a registered financial advisor currently at XYPN INVEST located in Hopkinton, Massachusetts.
William is registered as an IAR (Investment Advisor Representative) and started their career in finance in 1995. William has worked at 7 firms and has passed the Series 65, Series 63, Series 7 and Series 6 exams.
At a Glance
Aliases
Other business activities
CRS (Client Relationship Summary) - RIA
Click below to view William James Dion's CRS (Customer Relationship Summary).
Certified licenses
Start date: 2002
Experience
July 15, 2026 - Present
XYPN INVEST
January 27, 2025 - June 3, 2026
CERITY PARTNERS LLC
August 21, 2019 - February 3, 2025
PRIO WEALTH LP
February 18, 2011 - May 26, 2011
SAGE FINANCIAL PLANNING, LLC
September 14, 2005 - December 31, 2010
SAGE FINANCIAL PLANNING, LLC
November 18, 1999 - October 26, 2004
STRATEGIC ADVISERS LLC
October 30, 1998 - October 26, 2004
FIDELITY BROKERAGE SERVICES LLC
July 13, 1995 - October 30, 1998
FIDELITY DISTRIBUTORS COMPANY LLC
Primary Firm SEC Registration
XYPN INVEST
CRD#: 285967 / SEC#: 801-118916
State Registrations and Notice Filings
Listed states reflect where the advisor is authorized to serve clients under state regulations.
Highlighted states indicate IAR registrations
(7/15/2026)
Exams
Current Firm
XYPN INVEST
CRD#: 285967 / SEC#: 801-118916
Contact information
SEC notice filing (36 States and Territories)
Regulatory assets under management
| Total Number of Accounts | 3,774 |
| AUM (Assets Under Management) | $ 881,518,149 |
Red Flags
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