# EDGAR Filing Document

**Accession Number:** 0001527511
**File Stem:** 0001527511-26-000004
**Filing Date:** 2026-5
**Character Count:** 2370
**Document Hash:** 32e0cca3091235438b516b6d306aced9
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001527511-26-000004.hdr.sgml**: 20260513

**ACCESSION NUMBER**: 0001527511-26-000004

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

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20251231

**FILED AS OF DATE**: 20260513

**DATE AS OF CHANGE**: 20260513

**EFFECTIVENESS DATE**: 20260513

**PERIOD START**: 20250101

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** BACK BAY LIFE SCIENCE ADVISORY, LLC
- **CENTRAL INDEX KEY:** 0001527511

**ORGANIZATION NAME:**
- **EIN:** 452387662
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** X-17A-5
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 008-68931
- **FILM NUMBER:** 26971771

**BUSINESS ADDRESS:**
- **STREET 1:** 545 BOYLSTON STREET
- **STREET 2:** 12TH FLOOR
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02116
- **BUSINESS PHONE:** 617-367-0099

**MAIL ADDRESS:**
- **STREET 1:** 2016 OCEAN STREET
- **STREET 2:** MAIL BOX 5
- **CITY:** NARSHFIELD
- **STATE:** MA
- **ZIP:** 02050

### Attached PDF Documents

**Attachment 1:** `audit2025_1.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:** 0001527511

**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:** BACK BAY LIFE SCIENCE ADVISORY, LLC

**Business Address:** 545 BOYLSTON STREET, 12TH FLOOR, BOSTON, MA, 02116

**Contact Person:** Peter Flynn

**Contact Phone:** 6173670099

### Independent Public Accountant Identification

**Accountant Name:** Morris & Morris  PC

**Accountant Address:** 32 Kearney Rd, Needham, MA, 02494

**Accountant Type:** Certified Public Accountant

### OATH OR AFFIRMATION

I, **Peter Flynn**, swear (or affirm) that, to the best of my knowledge and belief, the accompanying financial statements and supporting schedules pertaining to the firm of **BACK BAY LIFE SCIENCE ADVISORY, LLC**, as of **12-31-2025**, are true and correct.

**Signature:** Peter F Flynn

**Title:** CFO