Branch offices
6 offices
FINRA: Small firm
CRD #17643 · FINRA BrokerCheck + SEC IAPD
Mack Investment Securities, Inc.
According to FINRA BrokerCheck disclosure totals used on PlainAdvisorCheck graded firms, Mack Investment Securities, Inc. ranks #13,581 of 20,055 by disclosure count (most disclosures first). Among firms registered in IL, it ranks #166 of 200 on the same disclosure sort used on the state browse page. Mack Investment Securities, Inc. has a clean FINRA BrokerCheck record, no reportable disclosures across its 6 branch offices, earning a Grade A.
- Grade A
- Safety grade
- 6
- branch offices
- 0
- disclosures
- #13,581 of 20,055
- disclosure rank · graded
FINRA BrokerCheck disclosure docket
CRD record 17643 Mack Investment Securities, Inc.
Mack Investment Securities, Inc. · Grade A · 0 disc · 0.00/office · Small firm
- CRD 17643
- GRADE A
- DISC 0
- REG 0
- ARB 0
- CIV 0
- BRANCH 6
- PER-OFF 0.00
- RANK #13,581 of 20,055
- BOOK Small firm
Intensity peers
Nearest same-size peer: 1031 Securities Inc. (0.00 disc/office)
Mack Investment Securities, Inc. ranks #13,581 of 20,055 by disclosure count among graded broker-dealers; clean record at 0.00 disclosures per office. Verify on FINRA BrokerCheck →
PlainAdvisorCheck rating 5/5 - an editorial, size-normalized signal, not a regulatory determination. Always verify the underlying record on FINRA BrokerCheck before engaging an advisor.
Data updated July 2026
Total disclosures
0 events
On FINRA BrokerCheck
Regulatory events
0 actions
On FINRA BrokerCheck
Disclosures per office
0.00 per office
0 ÷ 6 offices
Clean disclosure surface
Mack Investment Securities, Inc. has zero reportable FINRA BrokerCheck disclosures in this extract across 6 branch offices (Grade A). Verify on FINRA BrokerCheck ↗
Firm Details
- Firm Size
- Small
- Scope
- ACTIVE
- Location
- Northfield, IL
- CRD Number
- 17643
Clean BrokerCheck surface
Mack Investment Securities, Inc.'s clean BrokerCheck surface
Mack Investment Securities, Inc. shows a clean FINRA BrokerCheck surface: zero reportable disclosures on 6 branch offices (Grade A).
Mack Investment Securities, Inc. shows zero reportable disclosures across 6 branch offices in this extract. Verify on FINRA BrokerCheck ↗ · how disclosures are interpreted.
Educational summary of Mack Investment Securities, Inc.'s clean BrokerCheck surface - not financial advice. Always verify on FINRA before engaging an advisor.
Illinois cohort · 0.00× state average
Mack Investment Securities, Inc. sits below the Illinois disclosure average
Mack Investment Securities, Inc. reports 0 BrokerCheck disclosures, 0.00× the Illinois average of 5.1, lighter than most of the 200 graded firms filed there.
In Illinois, 99 firms carry Grade A and 8 carry Grade F on the same size-normalized scale.
Average uses graded firms with a principal-office state on file, not a full 50-state census. Open the Illinois state book →
Source: FINRA BrokerCheck & SEC IAPD Public Disclosure Data
Frequently Asked Questions
Where does Mack Investment Securities, Inc. sit among graded broker-dealers by disclosure count?
According to FINRA BrokerCheck disclosure totals used on PlainAdvisorCheck graded firms, Mack Investment Securities, Inc. ranks #13,581 of 20,055 by disclosure count (most disclosures first). Among firms registered in IL, it ranks #166 of 200 on the same disclosure sort used on the state browse page. Ordinals match the disclosure-first sort documented on our methodology corpus-placement section. A high disclosure rank is not automatically a finding of wrongdoing; larger firms accumulate more reported events. Always review the underlying FINRA BrokerCheck detail before engaging.
What does a grade of A mean for Mack Investment Securities, Inc.?
A grade of A means Mack Investment Securities, Inc. has a clean record, no reportable FINRA BrokerCheck disclosures on file. Grades on PlainAdvisorCheck are size-normalized: clean firms earn an A regardless of size.
How many FINRA disclosures does Mack Investment Securities, Inc. have?
Mack Investment Securities, Inc. has 0 total FINRA disclosures. Disclosures reflect reported events on FINRA BrokerCheck and do not necessarily indicate proven violations.
How big is Mack Investment Securities, Inc.?
Mack Investment Securities, Inc. operates 6 branch offices and is classified by FINRA as a small firm, registered in IL (Small firm). FINRA BrokerCheck publishes branch-office counts but not a firmwide registered-representative headcount, so PlainAdvisorCheck measures firm size by branch footprint.
Where can I verify Mack Investment Securities, Inc.'s disciplinary record?
You can verify Mack Investment Securities, Inc.'s full disciplinary history on FINRA BrokerCheck at brokercheck.finra.org using CRD number 17643. BrokerCheck provides detailed information about individual registered representatives, complaints, and regulatory actions.
What is a FINRA disclosure?
A FINRA disclosure is a reported event on a broker-dealer's BrokerCheck record. Mack Investment Securities, Inc. currently shows none - that is a clean surface, not a guarantee that future events will not appear.
Nationwide peers by disclosures or branches
Two PlainAdvisorCheck-derived peer sets for Mack Investment Securities, Inc., both outside IL so the neighborhoods are not state containment (the same-size intensity list below stays size-tier local).
Similar branch footprint
Nearest cross-state graded firms by branch-office count (6 here).
Read with this firm
- 1031 Securities Inc. (MI) - 0.00 disclosures/office, nearest small firm peer to Mack Investment Securities, Inc.'s 0.00
- 16 Points LLC (PR) - 0.00 disclosures/office, nearest small firm peer to Mack Investment Securities, Inc.'s 0.00
- 1851 Securities, Inc (CT) - 0.00 disclosures/office, nearest small firm peer to Mack Investment Securities, Inc.'s 0.00
- Firms in IL - state roster that includes Mack Investment Securities, Inc.'s registration home.
- How to Vet a Financial Advisor - Use Mack Investment Securities, Inc.'s clean BrokerCheck surface as the baseline when you compare other firms.
- Reading BrokerCheck Reports - What a Grade A page like Mack Investment Securities, Inc.'s does and does not prove.
- Clean-Record Firms - Other Grade-A firms ranked by footprint alongside Mack Investment Securities, Inc..
- Compare firms - put Mack Investment Securities, Inc. next to peers on grade and footprint.
Read our methodology - clean-record firms: what a Grade A surface does and does not prove.
Retrieved and formatted by PlainAdvisorCheck from FINRA BrokerCheck public records.