# EDGAR Filing Document

**Accession Number:** 0002094073
**File Stem:** 9999999995-26-000580
**Filing Date:** 2026-2
**Character Count:** 1353
**Document Hash:** b3d18de1e4f6303c7af3276c426150b5
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**9999999995-26-000580.hdr.sgml**: 20260217

**ACCESSION NUMBER**: 9999999995-26-000580

**CONFORMED SUBMISSION TYPE**: EFFECT

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260213

**DATE AS OF CHANGE**: 20260217

**EFFECTIVENESS DATE**: 20260213

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Clearthink 1 Acquisition Corp.
- **CENTRAL INDEX KEY:** 0002094073
- **STANDARD INDUSTRIAL CLASSIFICATION:** BLANK CHECKS [6770]
- **ORGANIZATION NAME:** 05 Real Estate & Construction
- **EIN:** 000000000
- **STATE OF INCORPORATION:** E9
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** EFFECT
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-292967
- **FILM NUMBER:** 26635826

**BUSINESS ADDRESS:**
- **STREET 1:** 851 BROKEN SOUND PARKWAY NW
- **STREET 2:** SUITE 280
- **CITY:** BOCA RATON
- **STATE:** FL
- **ZIP:** 33487
- **BUSINESS PHONE:** 561-807-9010

**MAIL ADDRESS:**
- **STREET 1:** 851 BROKEN SOUND PARKWAY NW
- **STREET 2:** SUITE 280
- **CITY:** BOCA RATON
- **STATE:** FL
- **ZIP:** 33487

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

## Notice of Effectiveness

**Date:** February 13, 2026

**Time:** 16:15:00

**Form Type:** S-1

---

**CIK:** 0002094073

**Company Name:** Clearthink 1 Acquisition Corp.

**File Number:** 333-292967