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William M Leonard

HERBERT J. SIMS & CO
Dallas, TX
·CRD# 8045531·1 year experience

Professional Summary

William M Leonard is a registered financial advisor currently at HERBERT J. SIMS & CO, INC. located in Dallas, Texas. William is registered as a RR (Registered Representative) and started their career in finance in 2026. William has worked at 1 firm and has passed the Series 52TO and SIE exams.

At a Glance

Best-Interest Standard

Fiduciary Standard

Fee Structure

Account Minimum

Active Clients

Fiduciary Standard

Fee Structure

Account Minimum

Active Clients

Other Aliases

There are no additional aliases reported.

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Videos & Posts

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Contact Information

This advisor has not claimed their profile yet, so there is no contact information to display at this time.

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Disclosures are events reported to regulators, such as customer disputes, regulatory actions, employment separations, or financial events. Some are resolved, denied, or contested — a disclosure is not a verdict. We recommend asking an advisor directly about any disclosure on their record.

Disclosures on record.

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.

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Years of Experience

1 years in the financial services industry

Current & Past Employments

HERBERT J. SIMS & CO, INC.·CRD# 3420
BD
5910 North Central Expressway Suite 1580, Dallas, TX 75206
January 29, 2026 - Present

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Current Firm

HJ
HERBERT J. SIMS & CO, INC.

HERBERT .J SIMS & CO, INC. | HERBERT J. SIMS & CO. INC. | HERBERT J. SIMS & CO, INC.

CRD#: 3420 / SEC#: 8-3315
BD
Broker-Dealer Firm Regulated by FINRA (Boston district office)

Contact Information

Main Address

2150 Post Road Suite 301, Fairfield, CT 06824

Mailing Address

2150 Post Road Suite 301, Fairfield, CT 06824

Phone Number

(203) 418-9000

Established

Delaware since 12/12/2012

Firm Type

Corporation

Fiscal Year End

December

Firm Size

Small

FINRA licenses (53 States and Territories)

Registered to provide investment advisory services in 0 US states and territories.

Documents

Customer Relationship Summary (CRS / FINRA)

Direct owners and executive officers

NamePositionCRD#
TEKSYS CORPORATIONOWNER—
DIAMOND, JASON HOWARDCHIEF FINANCIAL OFFICER/MANAGING PRINCIPAL2320884
RULNICK, AARON MMANAGING PRINCIPAL3149315
HEBERT, VALERIECHIEF COMPLIANCE OFFICER4007252
SANDS, R JEFFREYMANAGING PRINCIPAL4285040
SIMS, ELIZABETH BARNETTMANAGING PRINCIPAL5000820
SIMS, WILLIAM BARNETTOWNER425019

Disclosures

Regulatory Event

8

Arbitration

2

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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.

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State Registrations and Notice Filings

Listed states reflect where the advisor is authorized to serve clients under state regulations.
This advisor is not registered in any state.

Exams

Financial professionals may take different exams throughout their careers based on the types of services they provide and roles they perform.

Series 52TO — Municipal Securities Representative Examination

Passed Jan 2026About the Series 52TO exam

SIE — Securities Industry Essentials Examination

Passed Sep 2025About the SIE exam
FINRA
SRO Registrations

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CRS (Client Relationship Summary) - BD

Click below to view William M Leonard's CRS (Customer Relationship Summary).

CRS (Customer Relationship Summary)

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