# EDGAR Filing Document

**Accession Number:** 0002042347
**File Stem:** 9999999995-26-001408
**Filing Date:** 2026-4
**Character Count:** 1308
**Document Hash:** 3e0d24afa2500db4e0487b398729a568
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**9999999995-26-001408.hdr.sgml**: 20260501

**ACCESSION NUMBER**: 9999999995-26-001408

**CONFORMED SUBMISSION TYPE**: EFFECT

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260430

**DATE AS OF CHANGE**: 20260501

**EFFECTIVENESS DATE**: 20260430

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Seaport Therapeutics, Inc.
- **CENTRAL INDEX KEY:** 0002042347
- **STANDARD INDUSTRIAL CLASSIFICATION:** PHARMACEUTICAL PREPARATIONS [2834]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 992235719
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** EFFECT
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-294976
- **FILM NUMBER:** 26928619

**BUSINESS ADDRESS:**
- **STREET 1:** 6 TIDE STREET
- **STREET 2:** SUITE 400
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02110
- **BUSINESS PHONE:** 617-807-4062

**MAIL ADDRESS:**
- **STREET 1:** 6 TIDE STREET
- **STREET 2:** SUITE 400
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02110

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

## Notice of Effectiveness

**Date:** April 30, 2026

**Time:** 16:00:00

**Form Type:** S-1

---

**CIK:** 0002042347

**Company Name:** Seaport Therapeutics, Inc.

**File Number:** 333-294976