Mack Investment Securities, Inc. logo

Mack Investment Securities, Inc.

Updated today

Client AUM

$295,762,191

Clients

661

Advisors

7

across 2 offices

About

Mack Investment Securities serves individual investors (including high‑net‑worth clients), retirement and pension plans, and other institutional and custodial accounts, offering portfolio management, model strategy management through its Money Managers Plus (MMP) program, financial planning, pension consulting, and market timing services. The firm provides both discretionary and non‑discretionary advisory services and also makes referrals to independent advisers as part of its service menu.

The firm’s investment process centers on a manager‑of‑managers approach under MMP, allocating client assets among internal and third‑party subadvisors and model portfolios while also managing individual accounts directly. Several in‑house and subadvisor strategies explicitly use tactical and timing techniques — including technical indicators, seasonality analysis, hedging, and the selective use of leveraged and inverse ETFs — and the brochure notes that holdings and turnover can vary on an account‑by‑account basis.

Notable distinctions include the firm’s dual role as an SEC‑registered investment adviser and a FINRA member broker‑dealer, plus an affiliated insurance brokerage, which allows associated persons to implement recommendations in separate broker and insurance capacities and receive commissions or 12b‑1 compensation when clients elect that route. The firm also publishes a client newsletter and discloses affiliated subadvisors within its MMP program and explicit market‑timing services — features that create operational overlaps and potential conflicts of interest described in the brochure.

Client services

Financial planning Portfolio management Selection of other advisers Newsletters or periodicals Market timing

Expertise

Active portfolio management Private / alternative investments Retirement income strategy Annuities

Occupation focus

Executive Founder/Business Owner

Want help finding the right advisor?

Answer a few questions to see advisors matched to you.

Fee options

Fixed

Financial Planning and Consulting Services: fixed fees typically $2,000 to $8,000.

Percentage

$0 - : $100,000: Not clearly stated $100,000+: 1.00% to 2.25% annually for Individual Portfolio Management and Portfolio Management Services; 1.25% to 2.25% annually for Money Managers Plus Program and Pension Consulting Services

Commissions

Clients may engage firm's principals or associated persons as registered representatives to implement recommendations on commission basis; commissions vary.

Project-based

Financial Planning and Consulting: $300 to $500 per hour with two-hour minimum.

Other

Account minimum: $100,000 Fee-only: Financial Planning: one-time fixed fee $2,000 to $8,000; ongoing fixed fee $800 to $5,000 per quarter; hourly $300 to $500 per hour with two-hour minimum; Consulting Services: hourly $300 to $500 per hour, fixed fee $2,000 to $8,000, or 1.25% to 2.25% of assets under advisement.

Main office

See office

211 Waukegan Rd., Suite 300

Northfield IL 60093

Advisors at this office

6

Most active in

Arizona · California · Colorado · Florida · Illinois · Indiana · Iowa · Louisiana · Michigan · Mississippi · Missouri · Ohio · Texas · Washington · Wisconsin

Disclosures

Exclamation point means they have disclosures of this type. Check mark means no disclosures of this type were found.

Business activities & affiliations

Advisors at this firm

user avatar

Steven M

Series 63, Series 65

Lincolnshire, IL

Mack Investment Securities, Inc.

Steven Milstein is a financial advisor at Mack Investment Securities, Inc. with 34 years of industry experience. He holds Series 63 and Series 65 designations and has been with Mack Investment Securities since 1995. Outside of his advisory role, he serves as president of The Milstein Co., a business involved in the sale of egg products and life and health insurance. Mack Investment Securities advises individuals, pension and profit-sharing plans, corporations, and other custodial accounts through discretionary and non-discretionary portfolio management, model strategy management, financial planning, and pension consulting. The firm uses a manager-of-managers approach combined with firm-run model strategies that include tactical shifts and use of ETFs, integrating advisory, broker-dealer, and insurance activities within its services.

Active portfolio management Private / alternative investments Retirement income strategy Annuities Executive Founder/Business Owner
user avatar

John B

Series 63, Series 65

Northfield, IL

Mack Investment Securities, Inc.

John Budziak is a financial advisor at Mack Investment Securities, Inc. with 37 years of industry experience. He holds Series 63 and Series 65 licenses and has been with Mack Investment Securities and Cornerstone National Bank since 2010. In addition to his advisory role, he serves as Senior Vice President and Trust Officer at Cornerstone National Bank. Mack Investment Securities advises individuals, including high-net-worth clients, pension and profit-sharing plans, corporations, and other custodial accounts. The firm employs a manager-of-managers approach combined with firm-run model strategies that incorporate tactical shifts and the use of ETFs, offering both discretionary and non-discretionary portfolio management alongside financial planning and market-timing services.

Active portfolio management Private / alternative investments Retirement income strategy Annuities Executive Founder/Business Owner
user avatar

Stephen M

CFP®, Series 63

Northfield, IL

Mack Investment Securities, Inc.

Stephen Mack is a CFP® with 45 years of industry experience, serving as an advisor at Mack Investment Securities, Inc. since 1986. He holds a Series 63 license and participates on a regional FINRA committee. Additionally, he has a referral role as a Coldwell Bank Referral Agent related to real estate sales. Mack Investment Securities, Inc. serves individual investors, retirement and pension plans, and institutional accounts, offering portfolio management, financial planning, pension consulting, and market timing services. The firm uses a manager-of-managers approach through its Money Managers Plus program, combining internal and third-party strategies with tactical and timing techniques.

Active portfolio management Private / alternative investments Retirement income strategy Annuities Executive Founder/Business Owner
user avatar

Michael M

CFP®, Series 63, Series 65

Northfield, IL

Mack Investment Securities, Inc.

Michael Mack is a CFP® professional with 17 years of industry experience. He is a member of Mack Investment Securities, Inc., where he has worked since 2020. Prior to this, he held roles at JP Morgan Securities, LLC and JP Morgan Chase Bank from 2016 to 2019. Outside of his financial advisory work, he owns Midwest EMF Solutions LLC, a company that assesses homes for environmental health issues. Mack Investment Securities serves individual investors, retirement and pension plans, and institutional accounts, offering portfolio management, financial planning, and pension consulting. The firm’s investment approach emphasizes a manager-of-managers model through its Money Managers Plus program, utilizing both discretionary and non-discretionary advisory services with various tactical and timing strategies.

Active portfolio management Private / alternative investments Retirement income strategy Annuities Executive Founder/Business Owner
user avatar

Sheldon K

CFP®, Series 63

Northfield, IL

Mack Investment Securities, Inc.

Sheldon Kaiz is a CFP® with 42 years of industry experience, currently with Mack Investment Securities, Inc., where he has worked since 1988. He holds a Series 63 license and is based in Northfield, IL. Mack Investment Securities serves individual investors, retirement and pension plans, and institutional accounts, offering portfolio management, financial planning, and market timing services. The firm employs a manager-of-managers approach through its Money Managers Plus program, utilizing both internal and third-party subadvisors and incorporating tactical and timing strategies.

Active portfolio management Private / alternative investments Retirement income strategy Annuities Executive Founder/Business Owner
user avatar

John K

CFP®, Series 63

Northfield, IL

Mack Investment Securities, Inc.

John Kelty is a CFP® professional with 37 years of experience at Mack Investment Securities, Inc., where he has worked since 1989. He holds a Series 63 license and is based in Northfield, IL. Outside of his advisory role, he is involved on an as-needed basis with a family-owned lawn care, paving, and snow removal business. Mack Investment Securities, Inc. serves individuals, including high-net-worth clients, as well as pension and profit-sharing plans, corporations, and custodial accounts. The firm employs a manager-of-managers approach combining independent and affiliated sub-advisers with firm-run model strategies that include tactical shifts and use of ETFs, offering both commission and fee-based implementation.

Active portfolio management Private / alternative investments Retirement income strategy Annuities Executive Founder/Business Owner
user avatar

Kevin M

Series 66

Northfield, IL

Mack Investment Securities, Inc.

Kevin Mack is a financial advisor with Mack Investment Securities, Inc. in Northfield, IL, holding a Series 66 designation and 14 years of industry experience. He has been with Mack Investment Securities since 2006. Mack Investment Securities advises individuals, pension and profit-sharing plans, corporations, and other custodial accounts, offering services such as portfolio management, financial planning, pension consulting, and market-timing. The firm employs a manager-of-managers structure combining sub-adviser oversight and firm-run model strategies, with some models allowing tactical asset allocation shifts and use of ETFs, including leveraged and inverse products.

Active portfolio management Private / alternative investments Retirement income strategy Annuities Executive Founder/Business Owner
View complete list of advisors at this firm
Warmer team member

Not sure where to start?

We'll help you think it through—whether you ultimately need an advisor or not. Warmer helps you compare advisors clearly, so you can choose with confidence.

Find your advisor

For advisor listings, we rely on sources including public filings and data provided by advisors, and we cannot guarantee that all information is current or accurate. Advisors are independent and may not have reviewed or updated this information. Please review an advisor’s Form ADV and do your own diligence before deciding whether to work with them.

Advisor matching and introductions are provided by FinanceHQ LLC (“FHQ”), a wholly-owned subsidiary of Warmer and an SEC-registered investment advisor. We receive compensation from certain participating advisors for introductions or referrals. This creates a conflict of interest because we have an incentive to recommend advisors who compensate us, including those who pay us more. You pay no fee to use our matching service, and advisor fees are not increased because of a referral or introduction. We do not review the ongoing performance of advisors, manage or hold assets, guarantee performance, or provide advice about specific investments.

By using our service, you agree to our Terms of Service and Advisory Agreement, and acknowledge our Privacy Policy. Please review FHQ’s ADV Part 2A and Form CRS. Logos provided by Logo.dev

© 2026 Warmer Holdings Inc. (“Warmer”)