Mark D. Brost

CETERA INVESTMENT ADVISERS LLC

LADYSMITH, WI 54848

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CRD#: 2294590

Professional summary

Mark Douglas Brost, CFP® is a registered financial advisor currently at CETERA INVESTMENT ADVISERS LLC located in Ladysmith, Wisconsin and CETERA WEALTH SERVICES, LLC located in Ladysmith, Wisconsin.

Mark is registered as an IAR (Investment Advisor Representative) and RR (Registered Representative) and started their career in finance in 1992. Mark has worked at 8 firms and has passed the Series 65, Series 63, SIE and Series 7 exams.

Question & Answer

Are you a "fiduciary"?

Yes

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.

Blog Corner

CRS (Client Relationship Summary) - RIA

Click below to view Mark Douglas Brost's CRS (Customer Relationship Summary).

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®

CFP^®

Certified Financial Planner

Start date: 2004

Experience

Current

September 5, 2025 - Present

CETERA INVESTMENT ADVISERS LLC

Office #1: 818 Roesler Avenue W, Ladysmith, WI 54848

RIA

CRD#: 105644

LADYSMITH, WI

Current

September 5, 2025 - Present

CETERA WEALTH SERVICES, LLC

Office #1: 818 Roesler Avenue W, Ladysmith, WI 54848

CRD#: 13572

Ladysmith, WI

Past

April 1, 2002 - September 5, 2025

AVANTAX INVESTMENT SERVICES, INC.

CRD#: 13686

Ladysmith, WI

Past

March 5, 2002 - September 5, 2025

AVANTAX ADVISORY SERVICES

RIA

CRD#: 104556

Ladysmith, WI

Past

April 8, 1998 - April 1, 2002

MARQUETTE FINANCIAL GROUP, INC.

CRD#: 345

MINNEAPOLIS, MN

Past

July 15, 1996 - April 9, 1998

AEGON USA SECURITIES INC.

CRD#: 13302

CEDAR RAPIDS, IA

Past

July 22, 1993 - July 17, 1996

FIRST MIDWEST SECURITIES, INC.

CRD#: 21786

BLOOMINGTON, IL

Past

December 3, 1992 - August 3, 1993

QUEST CAPITAL STRATEGIES, INC.

CRD#: 16783

LAGUNA HILLS, CA

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".

CETERA INVESTMENT ADVISERS LLC

CRD#: 105644 / SEC#: 801-20406

RIA

Registered Investment Advisory firm - (1/13/1984 Approved)

State Registrations and Notice Filings

Listed states reflect where the advisor is authorized to serve clients under state regulations.

IAR

means the advisor is registered as an Investment Advisor Representative in this state and is authorized to provide investment advice to clients there.

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

Alaska
(9/5/2025)

Georgia
(9/5/2025)

Indiana
(9/5/2025)

Minnesota
(9/5/2025)

North Carolina
(9/5/2025)

Ohio
(9/5/2025)

Texas
(9/5/2025)

IAR

Texas
(9/5/2025)

Wisconsin
(9/5/2025)

IAR

Wisconsin
(9/5/2025)

Don't see your state listed? The advisor may still be able to work with you under the federal De Minimis Rule, which allows up to five investment advisory clients in a state without registration. Some states, like TX, LA, NE, and NH, may still require registration or notice filing. Contact the advisor or their firm to confirm their investment advisory availability in your state. Note: This rule does not apply to broker-dealer activity.

Exams

State Security Law Exam

IAR

Series 65

Date: 10/7/2000

Uniform Investment Adviser Law Examination

State Security Law Exam

Series 63

Date: 12/17/1992

Uniform Securities Agent State Law Examination

General Industry/Product Exam

SIE

Date: 10/1/2018

Securities Industry Essentials Examination

General Industry/Product Exam

Series 7

Date: 11/17/1992

General Securities Representative Examination

SRO Registrations

FINRA

Current Firm

CETERA INVESTMENT ADVISERS LLC

CRD#: 105644 / SEC#: 801-20406

RIA

Registered Investment Advisory firm - (1/13/1984 Approved)

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Contact information

Main Address

1450 American Lane 6th Floor, Suite 650, Schaumburg, IL 60173-2096

Mailing Address

Phone number

(310) 257-7880

Established

Firm type

Fiscal year end

# of Employees

7,705

SEC notice filing (53 States and Territories)

Documents

Customer Relationship Summary (CRS / SEC)

Latest Form ADV

Regulatory assets under management

Total Number of Accounts	584,487
AUM (Assets Under Management)	$ 163,792,814,520

Accountant surprise examination report

Filing Date	Form ADV-E Cover	Form ADV-E Report
10/27/2025	Cover Page	Report
12/13/2024	Cover Page	Report
09/26/2023	Cover Page	Report

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.

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Firm Stability Insights

Mark D. Brost

Professional summary

Question & Answer

Aliases

Other business activities

Blog Corner

CRS (Client Relationship Summary) - RIA

Click below to view Mark Douglas Brost's CRS (Customer Relationship Summary).

Certified licenses

Experience

CETERA WEALTH SERVICES, LLC

AVANTAX INVESTMENT SERVICES, INC.

AVANTAX ADVISORY SERVICES

MARQUETTE FINANCIAL GROUP, INC.

AEGON USA SECURITIES INC.

FIRST MIDWEST SECURITIES, INC.

QUEST CAPITAL STRATEGIES, INC.

Primary Firm SEC Registration

CETERA INVESTMENT ADVISERS LLC

State Registrations and Notice Filings

Exams

Series 65

Date: 10/7/2000

Series 63

Date: 12/17/1992

SIE

Date: 10/1/2018

Series 7

Date: 11/17/1992

FINRA

Current Firm

CETERA INVESTMENT ADVISERS LLC

Contact information

SEC notice filing (53 States and Territories)

Documents

Regulatory assets under management

Accountant surprise examination report

Red Flags

Company Information

CETERA INVESTMENT ADVISERS LLC

TRUST BUT VERIFY

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