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 $126.77B, about 235.6x GMTL ($538.2M).
- Over the past year, GMTL is down 4.1% and RIO is up 70.3% - RIO leads by 74.4 points.
- GMTL has been more active in the news (8 items in the past 4 weeks vs 2 for RIO).
- RIO has more recent analyst coverage (25 ratings vs 2 for GMTL).
PerformanceGMTL-4.09%RIO+17.58%
2026-03-23+0.00%2026-06-08
- Company
- Guardian Metal Resources PLC
- Rio Tinto Plc
- Price
- $13.85-3.28%
- $100.94+0.26%
- Market cap
- $538.2M
- $126.77B
- 1M return
- -7.33%
- -2.10%
- 1Y return
- -4.09%
- +70.28%
- Industry
- Metal Mining
- Metal Mining
- Exchange
- AMEX
- NYSE
- IPO
- 2026
- 2002
- News (4w)
- 8
- 2
- 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
- SEC Form 6-K filed by Guardian Metal Resources PLC
- Guardian Metal Resources PLC Announces Discovery of Tremor Zone at Pilot Mountain
- Guardian Metal Resources PLC Announces Exercise of Options
- The Metal China Controls Faces a 2027 U.S. Deadline -- and a Nevada Mine Just Made Its Move
- Tungsten's 557% Run Meets a District-Scale Critical-Minerals Story in British Columbia
- SEC Form 424B3 filed by Guardian Metal Resources PLC
- SEC Form 6-K filed by Guardian Metal Resources PLC
- Guardian Metal Resources PLC Announces Dr. Mark Thorpe appointed to the Board
- SEC Form 6-K filed by Guardian Metal Resources PLC
- Guardian Metal Resources PLC Announces Tempiute Historical Mine Tailings Update
Latest RIO
- Rio Tinto downgraded by RBC Capital Mkts
- Rio Tinto downgraded by BofA Securities
- SEC Form 6-K filed by Rio Tinto Plc
- Rio Tinto downgraded by Analyst
- Rio Tinto downgraded by Barclays
- Rio Tinto downgraded by Goldman
- SEC Form IRANNOTICE filed by Rio Tinto Plc
- Miners Win as China's Export Ban Triggers 54-Nation Pact Reshaping Critical Minerals
- Rio Tinto downgraded by Morgan Stanley
- Rio Tinto upgraded by Erste Group