Chatham Rock Phosphate CEO certifies interim filings, notes venture issuer limitations

Chris Castle, chief executive of Chatham Rock Phosphate Limited, has certified the company's interim financial report and MD&A for the period ended September 30, 2025. This certification, Form 52-109FV2, confirms the filings do not contain any material misrepresentations and fairly present the company's financial condition, performance, and cash flows.

The Venture Issuer Basic Certificate, unlike those for non-venture issuers, does not include representations regarding the establishment and maintenance of disclosure controls and procedures (DC&P) or internal control over financial reporting (ICFR). This means the certification does not cover procedures for recording and reporting information within specified timelines or ensuring financial reporting reliability in accordance with GAAP.

Chatham Rock Phosphate's certifying officers are responsible for internal processes supporting their representations. Investors are reminded of the inherent limitations for venture issuers in designing and implementing cost-effective DC&P and ICFR, which may introduce additional risks to the quality and timeliness of filings.