CRD #153585 · FINRA BrokerCheck + SEC IAPD

Simplex Trading, LLC

According to FINRA BrokerCheck disclosure totals used on PlainAdvisorCheck graded firms, Simplex Trading, LLC ranks #1,888 of 20,055 by disclosure count (most disclosures first). Among firms registered in IL, it ranks #61 of 200 on the same disclosure sort used on the state browse page. Simplex Trading, LLC carries 4 BrokerCheck disclosures across 2 branch offices - elevated load for a small firm, earning a Grade B.

Verify on FINRA BrokerCheck → Browse all firms
Grade B
Safety grade
2
branch offices
4
disclosures
#1,888 of 20,055
disclosure rank · graded

FINRA BrokerCheck disclosure docket

CRD record 153585 Simplex Trading, LLC

Simplex Trading, LLC · Grade B · 4 disc · 2.00/office · Small firm

  • CRD 153585
  • GRADE B
  • DISC 4
  • REG 4
  • ARB 0
  • CIV 0
  • BRANCH 2
  • PER-OFF 2.00
  • RANK #1,888 of 20,055
  • BOOK Small firm

Intensity peers

Nearest same-size peer: A. R. Schmeidler & Co., Inc. (2.00 disc/office)

A. R. Schmeidler & Co.,…2.00AEI Securities, Inc.2.00Aldwych Securities LLC2.00Simplex Trading, LLC (this)2.00
Disclosures per office among small firm peers (lower is cleaner)

Simplex Trading, LLC ranks #1,888 of 20,055 by disclosure count among graded broker-dealers; elevated load at 2.00 disclosures per office. Verify on FINRA BrokerCheck →

PlainAdvisorCheck rating 4/5 - 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

Branch offices

2 offices

FINRA: Small firm

Total disclosures

4 events

On FINRA BrokerCheck

Regulatory events

4 actions

100% of all disclosures

Disclosures per office

2.00 per office

4 ÷ 2 offices

Simplex Trading, LLC vs. every disclosing firm

Disclosures per branch office, the size-normalized signal behind the grade (lower is cleaner)

2 a cleaner per-office record than 10% of 1,251 disclosing firms

0–0: 314 disclosing firms (25%). Below this entry. 0–1: 159 disclosing firms (13%). Below this entry. 1–1: 301 disclosing firms (24%). Below this entry. 1–1: 40 disclosing firms (3%). Below this entry. 1–1: 140 disclosing firms (11%). Below this entry. 1–2: 32 disclosing firms (3%). Below this entry. 2–2: 65 disclosing firms (5%). Below this entry. 2–2: 9 disclosing firms (1%). Below this entry. 2–2: 72 disclosing firms (6%). This entry sits in this band. 2–3: 14 disclosing firms (1%). Above this entry. 3–3: 24 disclosing firms (2%). Above this entry. 3–3: 6 disclosing firms (0%). Above this entry. 3–3: 32 disclosing firms (3%). Above this entry. 3–4: 5 disclosing firms (0%). Above this entry. 4–4: 10 disclosing firms (1%). Above this entry. 4–4: 3 disclosing firms (0%). Above this entry. 4–4: 9 disclosing firms (1%). Above this entry. 4–5: 3 disclosing firms (0%). Above this entry. 5–5: 11 disclosing firms (1%). Above this entry. 5–5: 2 disclosing firms (0%). Above this entry. This firm 0 5 every disclosing firm, by disclosures per office, bucketed by value

Each bar is a band; taller bars hold more disclosing firms. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source FINRA BrokerCheck · SEC IAPD · 2026

Disclosure Breakdown

Disclosure Type Count
Regulatory Events 4
Arbitrations 0
Civil Events 0
Total 4

Counts for Simplex Trading, LLC reflect events reported on FINRA BrokerCheck as of July 2026. Disclosures are reported events, not proven violations.

Disclosure category share

Regulatory 4 Arbitration 0 Civil 0

Firm Details

Firm Size
Small
Scope
ACTIVE
Location
Chicago, IL
CRD Number
153585

Regulator-heavy mix

Simplex Trading, LLC in the heavier-disclosure third

Simplex Trading, LLC carries 4 BrokerCheck disclosures across 2 branch offices - a heavier-third raw book among graded firms (#1,888 of 20,055). Regulator-initiated events are 100% of the book (4 regulatory / 0 arbitration / 0 civil).

100% of Simplex Trading, LLC's 4 disclosures are regulator-initiated (4 events). Verify on FINRA BrokerCheck ↗ · how disclosures are interpreted.

Educational summary of Simplex Trading, LLC's disclosure book - not financial advice. Disclosures are reported events, not proven violations; consult a licensed advisor before decisions.

Illinois cohort · 0.79× state average

Simplex Trading, LLC tracks near the Illinois disclosure average

Simplex Trading, LLC reports 4 BrokerCheck disclosures, about 0.79× the Illinois average of 5.1 across 200 graded firms.

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 Simplex Trading, LLC sit among graded broker-dealers by disclosure count?
According to FINRA BrokerCheck disclosure totals used on PlainAdvisorCheck graded firms, Simplex Trading, LLC ranks #1,888 of 20,055 by disclosure count (most disclosures first). Among firms registered in IL, it ranks #61 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 B mean for Simplex Trading, LLC?
A grade of B reflects Simplex Trading, LLC's disclosure intensity, its weighted disclosure load per branch office, ranked against other firms of a similar size (small firm). It carries 4 total disclosures across 2 branch offices. Review the specific disclosures on FINRA BrokerCheck before engaging.
How many FINRA disclosures does Simplex Trading, LLC have?
Simplex Trading, LLC has 4 total FINRA disclosures, including 4 regulatory events. Disclosures reflect reported events on FINRA BrokerCheck and do not necessarily indicate proven violations.
How big is Simplex Trading, LLC?
Simplex Trading, LLC operates 2 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 Simplex Trading, LLC's disciplinary record?
You can verify Simplex Trading, LLC's full disciplinary history on FINRA BrokerCheck at brokercheck.finra.org using CRD number 153585. 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 BrokerCheck. For Simplex Trading, LLC, the 2.00 per-office intensity is the size-normalized signal behind Grade B.
Should I avoid Simplex Trading, LLC because of its disclosures?
Not necessarily. Larger firms accumulate more disclosures simply because they operate more offices, so PlainAdvisorCheck grades each firm against same-size peers rather than on raw counts. Simplex Trading, LLC carries 4 disclosures across 2 branch offices (about 2.00 per office). Review the nature of individual disclosures on FINRA BrokerCheck before making a decision.

Read with this firm

Read our methodology - heavier-disclosure firms: how raw counts and per-office intensity are graded.

Retrieved and formatted by PlainAdvisorCheck from FINRA BrokerCheck public records.