RIO TINTO PLC-SPON ADR (RIO) Stock Institutional Trading Activity


RIO TINTO PLC-SPON ADR (RIO) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q4 2025), investors with some of the largest reported share count changes include Renaissance Technologies LLC, Sequoia Financial Advisors, Causeway Capital Management, Dodge & Cox Stock Fund, and Appaloosa Management. Explore insights into buying and selling patterns, position changes, and investment conviction levels to understand institutional trading behavior and market dynamics.

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Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q2 2019Renaissance Technologies LLCSell-184,900514,432$32,070
Q1 2019Dodge & Cox Stock FundSell-9009,500$559
Q1 2019Renaissance Technologies LLCBuy288,700699,332$41,156
Q4 2018Dodge & Cox Stock FundSell-10010,400$504
Q4 2018Renaissance Technologies LLCBuy127,532410,632$19,907
Q3 2018Renaissance Technologies LLCBuy137,900283,100$14,444
Q1 2018Dodge & Cox Stock FundSell-70010,500$541
Q4 2017Renaissance Technologies LLCSell-730,500145,200$7,685
Q3 2017Dodge & Cox Stock FundSell-1,20011,200$529
Q3 2017Renaissance Technologies LLCBuy720,200875,700$41,324
Q2 2017Renaissance Technologies LLCSell-749,000155,500$6,579
Q2 2017Appaloosa ManagementSell-156,867238,276$10,081
Q1 2017Dodge & Cox Stock FundSell-2,60012,400$504
Q1 2017Appaloosa ManagementBuy304,100395,143$16,074
Q4 2016Appaloosa ManagementBuy91,04391,043$3,502
Q3 2016Renaissance Technologies LLCSell-911,800904,500$30,210
Q2 2016Dodge & Cox Stock FundSell-80015,000$470
Q2 2016Renaissance Technologies LLCBuy1,703,1001,816,300$56,850
Q1 2016Dodge & Cox Stock FundSell-84015,800$447
Q1 2016Renaissance Technologies LLCBuy91,700113,200$3,200
Q4 2015Dodge & Cox Stock FundSell-60016,640$485
Q4 2015Renaissance Technologies LLCBuy12,40021,500$626
Q3 2015Dodge & Cox Stock FundSell-1,90017,240$583
Q3 2015Renaissance Technologies LLCSell-152,7009,100$308
Q3 2015Causeway Capital ManagementBuy92,951300,978$10,179
Q2 2015Dodge & Cox Stock FundSell-60019,140$789
Q2 2015Renaissance Technologies LLCSell-220,900161,800$6,668
Q1 2015Dodge & Cox Stock FundSell-2,50019,740$817
Q1 2015Causeway Capital ManagementSell-56,051208,027$8,612
Q4 2014Dodge & Cox Stock FundSell-2,27222,240$1,024

Frequently asked questions about RIO activity

  • Which institutional owners are buying RIO?

    Institutional owners buying RIO include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in RIO activity?

    "Buy" means an investor increased their reported position in RIO compared to the prior reporting period. This reflects growing exposure to RIO TINTO PLC-SPON ADR (RIO) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in RIO increasing?

    Institutional interest in RIO can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.