RIO TINTO MINING AND EXPLORATION LIMITED

1. RIO TINTO MINING AND EXPLORATION LIMITED 1997-06-25 → present
2. RTZ MINING AND EXPLORATION LIMITED 1988-10-14 → 1997-06-25
3. DELABOLE SLATE LIMITED 1981-12-31 → 1988-10-14
4. PERSKIP LIMITED 1977-03-30 → 1981-12-31

Values shown as filed in the company's annual accounts. — indicates the figure wasn't present under that line item in that period. About these numbers

Margins divide P&L lines by turnover. Gearing is liabilities over total assets. Current ratio is current assets over creditors falling due within one year. Interest cover is operating profit over absolute finance costs. Sector-distribution context coming next.

Accounting basis

FRS 101

Reporting scope

Standalone (parent only)

Auditor

KPMG LLP

Audit opinion

Unqualified (clean)

Going concern

Affirmed

“The directors have determined that there are no foreseeable circumstances which would indicate that the Company could not continue to operate as a going concern for at least twelve months from the issuance of the financial statements.”

Group structure

1. RIO TINTO MINING AND EXPLORATION LIMITED · parent
   1. Rio Tinto Exploration Kazakhstan LLP 100% · Kazakhstan
   2. Rio Tinto Exploration Zambia Limited 100% · Zambia
   3. Rio Tinto Mining and Exploration S.A.C. 100% · Peru
   4. Solwezi Metals Exploration Limited 100% · Zambia
   5. Sovereign Metals Limited 19.9% · Australia

Significant events

• “In May 2025, RTME has sent a notice to exercise it's 1st option to MCC Mining Corporation ("MCC"). The formation and structure of new entity "ACO Colombia S.A.S" is still in process.”
• “In July 2025, the Company issued 100,000,000 ordinary shares of US$1 each to its parent undertaking RTM Ltd and the resulting funds are kept as deposit with RTM Ltd, to be drawn as and when required.”
• “In July 2025, management issued notice to Zirco Group not to exercise the Stage 2 option. RTME continues to assess its options with regards to existing shares (15% acquired via Stage 1 option) in Zirco Australia.”
• “In July 2025, capital funding of $3,670,000 has been made to Rio Tinto Exploration Kazakhstan LLP ("RTEK") by RTME.”

Auditor, going-concern and subsidiary information is drawn from the narrative of the latest annual accounts. About these numbers

Filings

4

last 12 months

Capital events

3

last 24 months

Officers appointed

0

last 12 months

Officers resigned

0

last 12 months

Direct counts from the register. No score, no rating — see the Filing timeline for the underlying events.

• Turnover

  —

  Not reported

• Cash

  +93.3%

  £3,149,741 → £6,089,696

• Net assets

  -46.8%

  £87,163,084 → £46,356,560

• Employees

  -1.9%

  103 → 101

• Profit before tax

  -58.9%

  -£40,197,924 → -£63,873,981

• Wages

  +14.1%

  £12,021,497 → £13,711,638

Each % is (latest − prior) ÷ |prior| for the line item as filed. The comparison is only shown when the latest and prior accounts cover broadly equal-length periods — short or long stubs (typical around incorporation or a year-end change) are suppressed rather than misrepresented. Lines a company doesn't report are omitted. About these numbers