ClearThink 1 Acquisition Corp. Rights – Material Contracts Watch

from 8-K 16 pages Introduction

from 8-K 15 pages Introduction

from 8-K 15 pages Introduction

from 8-K 15 pages Introduction

from 8-K 16 pages Introduction

from 8-K 2 pages Administrative Services Agreement February 25, 2026

from 8-K 12 pages Investment Management Trust Agreement

from 8-K 15 pages This Registration Rights Agreement (This “Agreement”), Dated February 25, 2026, Entered Into by and Among Clearthink 1 Acquisition Corp., a Cayman Islands Exempted Company Limited by Shares, With Principal Offices at C/O Ogier Global (Cayman) Limited, 89 Nexus Way, Camana Bay, Grand Cayman, Ky1-9009, Cayman Islands (The “Company”), Clearthink 1 Sponsor LLC, a Florida Limited Liability Company (The “Sponsor”), and the Other Parties Listed on the Signature Pages Hereto (Each Such Party, Together With the Sponsor and Any Person or Entity Who Hereafter Becomes a Party to This Agreement Pursuant to Section 5.2 of This Agreement, a “Holder” and Collectively, the “Holders”)

from 8-K 7 pages February 25, 2026 Clearthink 1 Acquisition Corp. 150 E. Palmetto Park Road Suite 202 Boca Raton, Florida 33432 Re: Initial Public Offering Ladies and Gentlemen

from S-1/A 3 pages Administrative Services Agreement [●], 2026

from S-1/A 21 pages Introduction

from S-1/A 8 pages Private Placement Unit Purchase Agreement

from S-1/A 19 pages This Registration Rights Agreement (This “Agreement”), Dated [●], 2026, Entered Into by and Among Clearthink 1 Acquisition Corp., a Cayman Islands Exempted Company Limited by Shares, With Principal Offices at C/O Ogier Global (Cayman) Limited, 89 Nexus Way, Camana Bay, Grand Cayman, Ky1-9009, Cayman Islands (The “Company”), Clearthink 1 Sponsor LLC, a Florida Limited Liability Company (The “Sponsor”), and the Other Parties Listed on the Signature Pages Hereto (Each Such Party, Together With the Sponsor and Any Person or Entity Who Hereafter Becomes a Party to This Agreement Pursuant to Section 5.2 of This Agreement, a “Holder” and Collectively, the “Holders”)

from S-1/A 12 pages Investment Management Trust Agreement

from S-1/A 9 pages [●], 2026 Clearthink 1 Acquisition Corp. 150 E. Palmetto Park Road Suite 202 Boca Raton, Florida 33432 Re: Initial Public Offering Ladies and Gentlemen

from S-1/A 10 pages Clearthink 1 Acquisition Corp. C/O Ogier Global (Cayman) Limited, 89 Nexus Way, Camana Bay, Grand Cayman, Ky1-9009, Cayman Islands October 14, 2025 Clearthink 1 Sponsor LLC 851 Broken Sound Parkway Nw, Suite 280, Boca Raton Fl 33487, United States of America Re: Subscription Agreement for Founder Shares Ladies and Gentlemen

from S-1/A 5 pages Clearthink 1 Acquisition Corp. Promissory Note