MASSACHUSETTS FINANCIAL SERVICES CO /MA/

Position in RIO — Rio Tinto PLC

CIK 912938 Boston, MA

Back to RIO Full portfolio

Position in RIO

as of Mar 31, 2026 · filed May 14, 2026 Compact

Position Value

$34,362,438

+$6,537,449 QoQ

Shares Held

368,340

+5.9% QoQ

Ownership

0.029%

of shares outstanding

% of Portfolio

0.01%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

25 quarters on record

Voting authority Sole 0.3241570288320573.ToString("F0")% Shared 99.67584297116794.ToString("F0")% None 0.ToString("F0")%

Common Shares in RIO Over Time

Shares Held

Position Value (USD)

Position in Other Industrial Metals & Mining

Basic Materials · as of Mar 31, 2026

MASSACHUSETTS FINANCIAL SERVICES CO /MA/ holds $457,195,147 across 4 Other Industrial Metals & Mining names. RIO ranks #3 (7.5% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	TECK	Teck Resources Ltd	5,922,775	$306,503,604
2	VALE	Vale S.A.	7,259,506	$115,498,736
3	RIO	Rio Tinto PLC This page	368,340	$34,362,438
4	GSM	Ferroglobe PLC	201,546	$830,369

All Filings in RIO

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25 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$34,362,438	368,340	+5.9%	Shares	Sole	2026-05-14
2025-12-31	$27,824,989	347,682	+35.8%	Shares	Sole	2026-01-22
2025-09-30	$16,900,340	256,027	+20.8%	Shares	Sole	2025-10-29
2025-06-30	$12,359,776	211,894	+4.8%	Shares	Sole	2025-08-08
2025-03-31	$12,143,187	202,117	+20.7%	Shares	Sole	2025-05-02
2024-12-31	$9,850,085	167,490	+26.8%	Shares	Sole	2025-02-12
2024-09-30	$9,404,473	132,141	+2.7%	Shares	Sole	2024-11-12
2024-06-30	$8,479,718	128,617	+3.2%	Shares	Sole	2024-08-09
2024-03-31	$7,941,621	124,594	-0.0%	Shares	Sole	2024-05-14
2023-12-31	$9,279,352	124,622	+5.8%	Shares	Sole	2024-02-08
2023-09-30	$7,499,146	117,837	+4.7%	Shares	Sole	2023-11-08
2023-06-30	$7,182,957	112,515	+6.1%	Shares	Sole	2023-08-09
2023-03-31	$7,272,834	106,018	+1.8%	Shares	Sole	2023-05-10
2022-12-31	$7,416,547	104,165	+9.8%	Shares	Sole	2023-02-13
2022-09-30	$5,221,889	94,840	+1.5%	Shares	Sole	2022-11-09
2022-06-30	$5,702,280	93,480	+5.9%	Shares	Sole	2022-08-09
2022-03-31	$7,097,149	88,273	+3.3%	Shares	Sole	2022-05-11
2021-12-31	$5,721,495	85,472	0.0%	Shares	Sole	2022-02-10
2021-09-30	$5,711,239	85,472	+0.9%	Shares	Defined	2021-11-10
2021-06-30	$7,108,251	84,733	+1.8%	Shares	Defined	2021-08-13
2021-03-31	$6,462,498	83,226	+9.4%	Shares	Defined	2021-05-13
2020-12-31	$5,724,016	76,097	-1.1%	Shares	Defined	2021-05-12
2020-09-30	$4,646,768	76,946	-1.3%	Shares	Defined	2020-11-12
2020-06-30	$4,377,714	77,923	+0.5%	Shares	Defined	2020-11-20
2020-03-31	$3,533,679	77,561	—	Shares	Defined	2020-11-20
No filing history on record for this holder in this stock.