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Compare · GMTL vs RIO

GMTL vs RIO

Side-by-side comparison of Guardian Metal Resources PLC (GMTL) and Rio Tinto Plc (RIO): market cap, price performance, sector, and recent activity on the wire.

Summary

  • Both GMTL and RIO operate in Metal Mining (Basic Materials), so they compete in similar markets.
  • RIO is the larger of the two at $124.80B, about 196.7x GMTL ($634.4M).
  • Over the past year, GMTL is up 11.6% and RIO is up 68.7% - RIO leads by 57.1 points.
  • GMTL has been more active in the news (13 items in the past 4 weeks vs 1 for RIO).
  • RIO has more recent analyst coverage (25 ratings vs 2 for GMTL).
PerformanceGMTL+11.63%RIO+12.20%
2026-03-23+0.00%2026-06-23
MetricGMTLRIO
Company
Guardian Metal Resources PLC
Rio Tinto Plc
Price
$16.12-2.15%
$96.32-3.08%
Market cap
$634.4M
$124.80B
1M return
-5.73%
-8.05%
1Y return
+11.63%
+68.72%
Sector
Basic Materials
Basic Materials
Industry
Metal Mining
Metal Mining
Exchange
AMEX
NYSE
IPO
2026
2002
News (4w)
13
1
Recent ratings
2
25
RIO

Rio Tinto Plc

Rio Tinto Group engages in exploring, mining, and processing mineral resources worldwide. The company offers aluminum, copper, diamonds, gold, borates, titanium dioxide, salt, iron ore, and uranium. It also owns and operates open pit and underground mines, mills, refineries, smelters, power stations, and research and service facilities. The company was founded in 1873 and is headquartered in London, the United Kingdom.

Latest GMTL

Latest RIO