CRP SUPPLIES LUMP PHOSPHATE SAMPLES TO POTENTIAL CUSTOMER

NEWS RELEASE 25-013 July 21, 2025

CHATHAM SUPPLIES LUMP PHOSPHATE SAMPLES TO MALAYSIAN YELLOW PHOSPHORUS
PRODUCER

WELLINGTON New Zealand - Chatham Rock Phosphate Limited (TSXV: “NZP”, NZX: “CRP”
and “3GRE” (Frankfurt) or the “Company”) is pleased to announce that it has once again
advanced the future prospects of its Korella North Mine with the supply of lump phosphate
samples to a yellow phosphorus producer in Malaysia.

The Malaysian phosphate producer Cahya Mata Phosphates is based in Sarawak and utilises
abundant sustainable hydroelectric power in its three electric arc furnaces. With the three
furnaces in full operation Cahya Mata Phosphates has a demand for 440,000 tonnes per
annum of lump phosphate.

The plants produce Yellow Phosphorous, Technical Grade Phosphoric Acid and Food Grade
Phosphoric Acid (to be used as feedstock for animal feed, fertiliser and other products), with
an annual production capacity of 48,000 Metric Tons (MT), 75,000 MT and 60,000 MT
respectively. The recent sample sent to Cayha Mata is the second sample sent to them and
subject to further testing, negotiations for an offtake agreement will commence.

The supply of samples to Malaysia follows the earlier supply of lump phosphate samples to
a yellow phosphorus producer in China.

The initial Karumba export facility is planned to handle some 200,000 tpa of lump
phosphate with the product being transported by road train from the Korella North Mine to
an area at Karumba to be leased from Ports North.

Meanwhile, to further increase availability of lump phosphate from Korella North studies
have commenced into briquetting of the phosphate fines that would normally be sold into
the domestic market.

A suitable source of carbon would be included in the briquettes to add further value since
yellow phosphorus production requires carbon as a reductant. Currently in China some 20
per cent of the feed for yellow phosphorus plants are briquettes.

China last year imported just under 4 million tonnes of phosphate, primarily for yellow
phosphorus production.

About Yellow Phosphorus

Yellow phosphorus, also referred to as P4, is used as the base to produce Thermal Grade
Phosphoric Acid/Purified Phosphoric Acid that is used in the manufacture of lithium-iron-
phosphate batteries.

About Cahya Mata Phosphates Industries Sdn Bhd

Cahya Mata Phosphates Industries Sdn Bhd (also referred to as Cahya Mata Phosphates),
formerly known as Malaysian Phosphate Additives (Sarawak) Sdn Bhd, is the first integrated
phosphate complex in Malaysia. The plant is located strategically opposite Samalaju Port in
Samalaju Industrial Park and will increase the Group’s footprint across the Sarawak Corridor
of Renewable Energy (SCORE), as well as strengthen its earnings base in the future.

The three electric arc furnaces require an annual supply of 440,000 tonnes of lump
phosphate.

For further information contact:

Chris Castle
President and Chief Executive Officer
Chatham Rock Phosphate Limited
64 21 55 81 85 or chris@crpl.co.nz


Statements about the Company’s future expectations and all other statements in this press
release other than historical facts are “forward looking statements”. Such forward-looking
statements are based on numerous assumptions, and involve known and unknown risks,
uncertainties and other factors, including risks inherent in mineral exploration and
development, which may cause the actual results, performance, or achievements of the
Company to be materially different from any projected future results, performance, or
achievements expressed or implied by such forward-looking statements.

Neither the TSX Venture Exchange, its Regulation Service Provider (as that term is defined
under the policies of the TSX Venture Exchange), or New Zealand Exchange Limited has in any
way passed upon the merits of the above described transaction, and has neither approved nor
disapproved of the contents of this press release.