S&P affirms Chorus' BBB rating - outlook raised to positive

STOCK EXCHANGE ANNOUNCEMENT 11 November 2025 S&P affirms Chorus' BBB rating - outlook raised to positive S&P Global Ratings (S&P) has released the attached update on Chorus. The update states that S&P has applied new digital infrastructure rating criteria to Chorus. Under the new criteria, Chorus is now measured using a ‘Funds From Operations’ (FFO)-to-debt ratio, a core leverage metric used by S&P to assess a company’s creditworthiness, especially capital-intensive regulated entities in New Zealand. Previously S&P measured Chorus on a debt-to-EBITDA basis. S&P has noted that, at the current rating of 'BBB', the downside trigger has been set at FFO to debt of below 9% (which is roughly equivalent to a debt-to-EBITDA metric maintained above 7x, compared with Chorus’ prior downside debt-to-EBITDA threshold of 5x). As part of its review, S&P has changed Chorus’ long-term credit rating outlook to BBB ‘positive’ (from stable). Authorised by: Drew Davies Chief Operating Officer ENDS For further information: Aleida White Head of Investor Relations Mobile: 64 (21) 155 8837 Email: Aleida.White@chorus.co.nz Shannon Goldstone Head of Corporate Relations Mobile: 64 (21) 712 679 Email: Shannon.Goldstone@chorus.co.nz