# EDGAR Filing Document

**Accession Number:** 0000105464
**File Stem:** 0000105464-26-000006
**Filing Date:** 2026-6
**Character Count:** 3053
**Document Hash:** 313708f5f00be5d4a1d7acfa6c397740
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000105464-26-000006.hdr.sgml**: 20260618

**ACCESSION NUMBER**: 0000105464-26-000006

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

**PUBLIC DOCUMENT COUNT**: 5

**CONFORMED PERIOD OF REPORT**: 20251231

**FILED AS OF DATE**: 20260618

**DATE AS OF CHANGE**: 20260618

**EFFECTIVENESS DATE**: 20260618

**PERIOD START**: 20250101

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** BOSTON PARTNERS SECURITIES, L.L.C.
- **CENTRAL INDEX KEY:** 0000105464

**ORGANIZATION NAME:**
- **EIN:** 201169070
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** X-17A-5/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 008-15648
- **FILM NUMBER:** 261101822

**BUSINESS ADDRESS:**
- **STREET 1:** ONE BEACON STREET- 30TH FLOOR
- **STREET 2:** 60 E 42ND ST - SUITE 1550
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02108
- **BUSINESS PHONE:** 617-832-8149

**MAIL ADDRESS:**
- **STREET 1:** ONE BEACON STREET- 30TH FLOOR
- **STREET 2:** 60 E 42ND ST - SUITE 1550
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02108

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** ROBECO SECURITIES, L.L.C.
- **DATE OF NAME CHANGE:** 20050620

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** ROBECO USA, L.L.C.
- **DATE OF NAME CHANGE:** 20050613

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** ROBECO SECURITIES, L.L.C.
- **DATE OF NAME CHANGE:** 20050608

### Attached PDF Documents

**Attachment 1:** `BPSEXEM2025.pdf`

_No text found in this document._

**Attachment 2:** `BPSIPC25.pdf`

_No text found in this document._

**Attachment 3:** `BPSECFS2025.pdf`

_No text found in this document._

**Attachment 4:** `BPSECBS2025.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:** 0000105464

**Filer CCC:** XXXXXXXX

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

**Would you like a Return Copy?:** No

### 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:** BOSTON PARTNERS SECURITIES, L.L.C.

**Business Address:** ONE BEACON STREET- 30TH FLOOR, 60 E 42ND ST - SUITE 1550, BOSTON, MA, 02108

**Contact Person:** Lynn Jian

**Contact Phone:** 2129089708

### Independent Public Accountant Identification

**Accountant Name:** KPMG LLP

**Accountant Address:** Six Cricket Square, George Town, E9, KY1-1106

**Accountant Type:** Certified Public Accountant not resident in United States or any of its possessions

### OATH OR AFFIRMATION

I, **Lynn Jian**, swear (or affirm) that, to the best of my knowledge and belief, the accompanying financial statements and supporting schedules pertaining to the firm of **BOSTON PARTNERS SECURITIES, L.L.C.**, as of **12-31-2025**, are true and correct.

**Signature:** Lynn Jian

**Title:** Assistant Controller