MACK INVESTMENT SECURITIES, INC. X-17A-5 (2025-03-20) — Broker-dealer annual report

Full text of MACK INVESTMENT SECURITIES, INC.'s X-17A-5 filed 2025-03-20 (period 2024-12-31). Broker-dealer annual report from SEC EDGAR — readable, searchable, and available as markdown for AI agents.

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{0}------------------------------------------------ | PUBLIC | | UNITED STATES<br>SECURITIES AND EXCHANGE COMMISSION<br>Washington, D.C. 20549 | | Expires: Oct. 31, 2023 | OMB APPROVAL<br>OMB Number: 3235-0123<br>Estimated average burden<br>hours per response: 12 | |-----------------------------------------------------------------------------------------------------------------------------------|------------|-------------------------------------------------------------------------------|----------------------|------------------------|---------------------------------------------------------------------------------------------| | ANNUAL REPORTS | | | | SEC FILE NUMBER | | | | | FORM X-17A-5 | | | 8-35536 | | | PART III | | | | | | FACING PAGE<br>Information Required Pursuant to Rules 17a-5, 17a-12, and 18a-7 under the Securities Exchange Act of 1934 | | | | | | | filing for the period beginning 01/01/24<br>12/31/24<br>AND ENDING | | | | | | | 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>C 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 | | (State)<br>(City) | | | (Zip Code) | | | | PERSON TO CONTACT WITH REGARD TO THIS FILING | | | | | | | 847-657-6600<br>Stephen W Mack | | | 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<br>(Name - if individual, state last, first, and middle name) | | | | | | | 100 E SYBELIA AVE, SUITE 130 MAITLAND | | | | ﯩﻨﯩ | 32751 | | (Address) | | (City) | | (State) | (Zip Code) | | JULY 28, 2004 | 18339 | | | | | | (Date of Registration with PCAOB)(if applicable)<br>(PCAOB Registration Number, if applicable)<br>FOR OFFICIAL USE ONLY | | | | | | | * Claims for exemption from the requirement that the annual 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…

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