William Blair & Company
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William Blair & Company’s Rio Tinto RIO Stock Holding History

William Blair & Company’s Portfolio RIO Stock Details RIO Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$2.06M Sell
22,132
-1,866
-8% -$170K 0.01% 729
2025
Q4 		$1.92M Buy
23,998
+3,435
+17% +$247K 0.01% 755
2025
Q3 		$1.36M Buy
20,563
+4,110
+25% +$254K ﹤0.01% 838
2025
Q2 		$960K Buy
16,453
+2,483
+18% +$147K ﹤0.01% 909
2025
Q1 		$839K Sell
13,970
-3,523
-20% -$217K ﹤0.01% 932
2024
Q4 		$1.03M Buy
17,493
+5,182
+42% +$331K ﹤0.01% 900
2024
Q3 		$876K Sell
12,311
-4,604
-27% -$296K ﹤0.01% 940
2024
Q2 		$1.12M Buy
16,915
+7,807
+86% +$531K ﹤0.01% 839
2024
Q1 		$581K Sell
9,108
-2,324
-20% -$156K ﹤0.01% 1045
2023
Q4 		$851K Buy
11,432
+2,787
+32% +$187K ﹤0.01% 907
2023
Q3 		$550K Buy
8,645
+1,047
+14% +$66.8K ﹤0.01% 1023
2023
Q2 		$485K Sell
7,598
-891
-10% -$57.3K ﹤0.01% 1063
2023
Q1 		$582K Sell
8,489
-623
-7% -$45.2K ﹤0.01% 988
2022
Q4 		$649K Buy
9,112
+4,850
+114% +$305K ﹤0.01% 961
2022
Q3 		$235K Sell
4,262
-3,943
-48% -$227K ﹤0.01% 1325
2022
Q2 		$501K Buy
+8,205
New +$588K ﹤0.01% 1066
2021
Q3 		– Sell
-6,677
Closed -$560K – 1931
2021
Q2 		$560K Sell
6,677
-210
-3% -$18.1K ﹤0.01% 1114
2021
Q1 		$535K Buy
+6,887
New +$565K ﹤0.01% 1099
2018
Q4 		– Sell
-5,252
Closed -$268K – 1764
2018
Q3 		$268K Buy
5,252
+90
+2% +$4.59K ﹤0.01% 1189
2018
Q2 		$286K Sell
5,162
-14
-0.3% -$784 ﹤0.01% 1145
2018
Q1 		$267K Buy
5,176
+607
+13% +$33.1K ﹤0.01% 1111
2017
Q4 		$242K Sell
4,569
-800
-15% -$39K ﹤0.01% 1203
2017
Q3 		$253K Sell
5,369
-1,632
-23% -$75.9K ﹤0.01% 1180
2017
Q2 		$296K Hold
7,001
– – ﹤0.01% 1190
2017
Q1 		$285K Sell
7,001
-5,443
-44% -$231K ﹤0.01% 1092
2016
Q4 		$479K Sell
12,444
-2,150
-15% -$78.8K ﹤0.01% 848
2016
Q3 		$487K Sell
14,594
-1,134
-7% -$36.1K ﹤0.01% 841
2016
Q2 		$492K Sell
15,728
-456
-3% -$13.6K ﹤0.01% 813
2016
Q1 		$457K Sell
16,184
-437
-3% -$11.6K ﹤0.01% 811
2015
Q4 		$483K Sell
16,621
-31,291
-65% -$1.06M ﹤0.01% 814
2015
Q3 		$1.62M Sell
47,912
-34,446
-42% -$1.29M 0.01% 593
2015
Q2 		$3.39M Buy
82,358
+18,275
+29% +$802K 0.01% 1174
2015
Q1 		$2.65M Buy
64,083
+3,908
+6% +$177K ﹤0.01% 1221
2014
Q4 		$2.77M Sell
60,175
-168
-0.3% -$7.92K ﹤0.01% 1199
2014
Q3 		$2.97M Sell
60,343
-11,368
-16% -$628K 0.01% 1142
2014
Q2 		$3.89M Buy
71,711
+22,538
+46% +$1.22M 0.01% 1064
2014
Q1 		$2.75M Sell
49,173
-3,899
-7% -$212K ﹤0.01% 1113
2013
Q4 		$2.99M Sell
53,072
-8,880
-14% -$462K ﹤0.01% 1060
2013
Q3 		$3.02M Buy
+61,952
New +$2.89M 0.01% 1021

Other funds holding RIO

Fisher Asset Management
Fisher Asset Management Camas, Washington $295B AUM 31.6% 1-Year Est. Return
State Farm Mutual Automobile Insurance
State Farm Mutual Automobile Insurance Bloomington, Illinois $127B AUM 32.55% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $871B AUM 31.28% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
Mirae Asset Global ETFs Holdings
Mirae Asset Global ETFs Holdings Causeway Bay, Hong Kong $73.7B AUM 53.56% 1-Year Est. Return
Arrowstreet Capital
Arrowstreet Capital Boston, Massachusetts $185B AUM 39.58% 1-Year Est. Return
Bank of America
Bank of America Charlotte, North Carolina $1.37T AUM 24.88% 1-Year Est. Return
Neuberger Berman Group
Neuberger Berman Group New York $131B AUM 28.36% 1-Year Est. Return
Qube Research & Technologies (QRT)
Qube Research & Technologies (QRT) London, United Kingdom $89.9B AUM 20.22% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

William Blair & Company's RIO Position: Q1 2026 in Review

William Blair & Company reduced its Rio Tinto (RIO) stake by 7.8% in Q1 2026, selling an estimated $170K and leaving 22,132 shares worth $2.06M. The position accounts for 0.01% of the portfolio, ranked #729.

William Blair & Company first reported a position in RIO in Q3 2013 and has held it in 39 quarters since. The position peaked at $3.89M in Q2 2014. 935 funds tracked by Wall St. Rank hold RIO as of Q1 2026.

  • William Blair & Company held 22,132 shares of Rio Tinto worth $2.06M as of Q1 2026.
  • William Blair & Company sold 1,866 Rio Tinto shares in Q1 2026, an estimated $170K.
  • Rio Tinto made up 0.01% of William Blair & Company's portfolio in Q1 2026, its #729 holding.
  • William Blair & Company first reported a position in Rio Tinto in Q3 2013 and has held it in 39 quarters since.
  • William Blair & Company's Rio Tinto position peaked at $3.89M in Q2 2014.
  • 935 funds tracked by Wall St. Rank held Rio Tinto as of Q1 2026.

Based on William Blair & Company's 13F filing for Q1 2026, filed 8 May 2026.