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RIA / WealthAdvisor21 years in industry

WILLIAM LEONARD BERLIN

Advisor at MAINSTAY CAPITAL MANAGEMENT, LLC

GRAND BLANC, MI

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Search this name across graphsid dfx:ria:2bfc4209-1952-ffe2-9183-b2a7fb45bc5a

Data as of Sep 14, 2026 (this record's last observation) from federal regulator filings. Page built Sep 19, 2026, 10:35 AM UTC and rebuilt at most every 15 minutes.

Relationships: 8
Dated events: 0
On other graphs: 0
Observed: Sep 22, 2004 to Sep 14, 2026

Across DFX

This entity has not been resolved onto another DFX graph by a shared identifier. A name match elsewhere would be a candidate, never an identity, and none is recorded.

Facts

fact = as filed or announced; derived = computed by DFX; estimate = a band, never a point

Current firm: MAINSTAY CAPITAL MANAGEMENT, LLC
Current firm class: independent wealth managerderived
Book size: not publicno per-advisor AUM is published by the SEC, FINRA or IAPD, and DFX estimates none
Industry start: Sep 21, 2004earliest registration or exam on IAPD
Years in industry: 21derivedfrom the industry start date
Years at current firm: 0derivedfrom the current registration's begin date
Prior firms: 7
Current registrations: 1
Registered states: 1
Exams: S63|S65
First exam: Sep 21, 2004
First registration: Sep 22, 2004
Dual registered: no
IAPD individual key: 3004601

Registration history

registration spans on IAPD; the basis says whether the span is a current registration or a prior employment record

Firm	Class	Began	Ended	Current	Branch	Basis
MAINSTAY CAPITAL MANAGEMENT, LLC	Independent wealth	Mar 3, 2026	n/a	yes	GRAND BLANC, MI	Current employment
TD AMERITRADE INVESTMENT MANAGEMENT, LLC	Former SEC adviser	Mar 11, 2014	Dec 31, 2020	no	BIRMINGHAM, MI\|Grand Blanc, MI	Previous registration
TD AMERITRADE, INC.	Former SEC adviser	Mar 11, 2014	Jan 11, 2021	no	Birmingham, MI\|Omaha, NE\|GRAND BLANC, MI\|Grand Rapids, MI	Previous registration
GREYSTONE FINANCIAL GROUP, INC.	Former SEC adviser	Dec 6, 2011	Mar 26, 2014	no	SAN RAFAEL, CA	Previous registration
J2 CAPITAL MANAGEMENT, INC.	Independent wealth	Oct 19, 2010	Nov 14, 2011	no	TROY, MI	Previous registration
TD AMERITRADE INVESTMENT MANAGEMENT, LLC	Former SEC adviser	Jan 4, 2010	Aug 31, 2010	no	BIRMINGHAM, MI	Previous registration
TD AMERITRADE, INC.	Former SEC adviser	Apr 12, 2006	Aug 31, 2010	no	Birmingham, MI	Previous registration
MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATED	Wirehouse	Sep 22, 2004	Jun 28, 2005	no	DETROIT, MI	Previous registration

Moves

a move is two registration dates; a bulk corporate re-registration is typed BULK_TRANSFER and is not a move

From	To	Left	Joined	Gap, days	Kind	Move type
TD AMERITRADE, INC.	MAINSTAY CAPITAL MANAGEMENT, LLC	Jan 11, 2021	Mar 3, 2026	1,877	Firm change after gap	Other
TD AMERITRADE INVESTMENT MANAGEMENT, LLC	TD AMERITRADE, INC.	Dec 31, 2020	Mar 11, 2014	-2,487	Bulk transfer	Other
GREYSTONE FINANCIAL GROUP, INC.	TD AMERITRADE INVESTMENT MANAGEMENT, LLC	Mar 26, 2014	Mar 11, 2014	-15	Firm change	Other
J2 CAPITAL MANAGEMENT, INC.	GREYSTONE FINANCIAL GROUP, INC.	Nov 14, 2011	Dec 6, 2011	22	Firm change	Other
TD AMERITRADE, INC.	TD AMERITRADE INVESTMENT MANAGEMENT, LLC	Aug 31, 2010	Jan 4, 2010	-239	Channel change	Other
TD AMERITRADE INVESTMENT MANAGEMENT, LLC	J2 CAPITAL MANAGEMENT, INC.	Aug 31, 2010	Oct 19, 2010	49	Firm change	Other
MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATED	TD AMERITRADE, INC.	Jun 28, 2005	Apr 12, 2006	288	Firm change	Wirehouse to new firm

Relationships

Registered with (6)

→ MAINSTAY CAPITAL MANAGEMENT, LLCRegistered adviserregistration: current employment
Mar 3, 2026 to presentfactForm ADV
→ TD AMERITRADE, INC.Registered adviserregistration: previous registration
Mar 11, 2014 to Jan 11, 2021factForm ADV
→ TD AMERITRADE INVESTMENT MANAGEMENT, LLCRegistered adviserregistration: previous registration
Mar 11, 2014 to Dec 31, 2020factForm ADV
→ GREYSTONE FINANCIAL GROUP, INC.Registered adviserregistration: previous registration
Dec 6, 2011 to Mar 26, 2014factForm ADV
→ J2 CAPITAL MANAGEMENT, INC.Registered adviserregistration: previous registration
Oct 19, 2010 to Nov 14, 2011factForm ADV
→ MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATEDRegistered adviserregistration: previous registration
Sep 22, 2004 to Jun 28, 2005factForm ADV

Dated events

No dated event names this entity yet.