# EDGAR Filing Document

**Accession Number:** 0001044627
**File Stem:** 0001044627-26-000001
**Filing Date:** 2026-2
**Character Count:** 2527
**Document Hash:** 497d8fe3a7ca0d6c35f77a78599bdde3
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001044627-26-000001.hdr.sgml**: 20260227

**ACCESSION NUMBER**: 0001044627-26-000001

**CONFORMED SUBMISSION TYPE**: X-17A-5

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20251231

**FILED AS OF DATE**: 20260227

**DATE AS OF CHANGE**: 20260227

**EFFECTIVENESS DATE**: 20260227

**PERIOD START**: 20250101

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** PEAK6 CAPITAL MANAGEMENT LLC
- **CENTRAL INDEX KEY:** 0001044627

**ORGANIZATION NAME:**
- **EIN:** 364172640
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** X-17A-5
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 008-50422
- **FILM NUMBER:** 26695079

**BUSINESS ADDRESS:**
- **STREET 1:** 141 W. JACKSON BLVD.,
- **STREET 2:** SUITE 500
- **CITY:** CHICAGO
- **STATE:** IL
- **ZIP:** 60604
- **BUSINESS PHONE:** 312-444-8712

**MAIL ADDRESS:**
- **STREET 1:** 141 W. JACKSON BLVD.,
- **STREET 2:** SUITE 500
- **CITY:** CHICAGO
- **STATE:** IL
- **ZIP:** 60604

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** PEAK6 CAPITAL MANAGEMENT LLC                            /BD
- **DATE OF NAME CHANGE:** 20020318

### Attached PDF Documents

**Attachment 1:** `PEAK6CMSOFC2025.pdf`

_No text found in this document._

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM X-17A-5

### ANNUAL AUDITED REPORT

### Filer Information

**Filer CIK:** 0001044627

**Filer CCC:** XXXXXXXX

**Is this a LIVE or TEST filing?:** LIVE

**Would you like a Return Copy?:** Yes

### Submission Information

**Report Period Begin Date:** 01-01-2025

**Report Period End Date:** 12-31-2025

**Type of Registrant:** Broker-dealer

**Any material weaknesses identified?:** No

### Registrant Identification

**Name of Broker-Dealer:** PEAK6 CAPITAL MANAGEMENT LLC

**Business Address:** 141 W. JACKSON BLVD.,, SUITE 500, CHICAGO, IL, 60604

**Contact Person:** James Ward

**Contact Phone:** 312-444-8000

### Independent Public Accountant Identification

**Accountant Name:** RSM US LLP

**Accountant Address:** 30 S. Wacker Dr., Ste 3300, Chicago, IL, 60606

**Accountant Type:** Certified Public Accountant

### OATH OR AFFIRMATION

I, **Tom Simpson**, swear (or affirm) that, to the best of my knowledge and belief, the accompanying financial statements and supporting schedules pertaining to the firm of **PEAK6 CAPITAL MANAGEMENT LLC**, as of **12-31-2025**, are true and correct.

**Signature:** Tom Simpson

**Title:** Chief Executive Officer