Full text of MACK INVESTMENT SECURITIES, INC.'s X-17A-5 filed 2026-03-30 (period 2025-12-31). Broker-dealer annual report from SEC EDGAR — readable, searchable, and available as markdown for AI agents.
{0}------------------------------------------------ PUBLIC UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 OMB APPROVAL OMB Number: 3235-0123 Expires: Nov. 30, 2026 Estimated average burden hours per response: 12 ## ANNUAL REPORTS FORM X-17A-5 PART III | | SEC FILE NUMBER | | |--|-----------------|--| | Information Required Pursuant to Rules 17a-5, 17a-12, and 18a-7 under the Securities Exchange Act of 1934 | | FACING PAGE | | | | |-----------------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------|------------------------------------------------------------|----------------------|----------|--------------------------------------------| | | | | AND ENDING 12/31/25 | | | | | Filing for the period beginning 01/01/25<br>MM/DD/YY | | | MM/DD/YY | | | | | A. REGISTRANT IDENTIFICATION | | | | | NAME OF FIRM: Mack Investment Securities, Inc | | | | | | | TYPE OF REGISTRANT (check all applicable boxes):<br>@ Broker-dealer<br>Check here if respondent is also an OTC derivatives dealer | | | | | | | ADDRESS OF PRINCIPAL PLACE OF BUSINESS: (Do not use a P.O. box no.) | | | | | | | 211 Waukegan Road, Suite 300 | | | | | | | | | (No. and Street) | | | | | Northfield | | | | | 60093 | | (City) | | (State) | | | (Zip Code) | | PERSON TO CONTACT WITH REGARD TO THIS FILING | | | | | | | Stephen W Mack | 847-657-6600 | | steve@macktracks.com | | | | (Name) | (Area Code - Telephone Number) | | (Email Address) | | | | | | B. ACCOUNTANT IDENTIFICATION | | | | | INDEPENDENT PUBLIC ACCOUNTANT whose reports are contained in this filing* | | | | | | | Ohab and Company, PA | | | | | | | | | (Name - if individual, state last, first, and middle name) | | | | | 100 E Sybelia Ave., Suite 130 Maitland | | | | i | 32751 | | (Address) | | (City) | | (State) | (Zip Code) | | July 28, 2004 | | | 1838 | | | | (Date of Registration with PCAOB)(if applicable) | | | | | (PCAOB Registration Number, if applicable) | | | | FOR OFFICIAL USE ONLY | | | | \* Claims for exemption from the requirement that the annual reports be covered by the reports of an independent public accountant must be supported by a statement of facts and circumstances relied on as the basis of the exemption. See 17 CFR 240.17a-5(e)(1){ii), if applicable. Persons who are to respond to the collection of information contained in this form are not required to respond unless the form display…Read the full text as markdown