Company: RTNTF
Filing Date: 2025-03-10
Form Type: 424B2
Source: 0001104659-25-022024
Chunk: 13

Company: RIO TINTO LTD
Filing Date: 2025-03-10
Form: 424B2
Chunk 13
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 Unadjusted.

#### Day Count Fraction
30/360.

#### CUSIP

#### ISIN
<div align='center'>S-10</div>

TABLE OF CONTENTS

#### Floating Rate Notes

#### Stated Maturity
, 20

#### Principal Amount of Notes Being Issued
U.S.$

#### Issue Price
%

#### Interest
Interest will accrue at a floating rate, reset quarterly on each Interest Payment Date (as defined herein), equal to Compounded SOFR, plus % (as described in “Description of the Guaranteed Notes”).

#### Interest Payment Dates
Interest will be payable quarterly in arrears on , , and of each year, commencing on , 2025, and on the Stated Maturity Date.

#### Interest Reset Dates
Each Interest Payment Date.

#### Interest Determination Date
The second U.S. Government Securities Business Day preceding each Interest Payment Date.

#### Interest Period
The period from and including an Interest Payment Date (or, in the case of the initial Interest Period, the Settlement Date) to, but excluding, the immediately succeeding Interest Payment Date (such succeeding Interest Payment Date, the “Latter Interest Payment Date”); provided that the final interest period for the Floating Rate Notes will be the period from and including the Interest Payment Date immediately preceding the maturity date or redemption date, as applicable, of the Floating Rate Notes to, but excluding, the maturity date, or redemption date.

#### Observation Period
The period from and including two U.S. Government Securities Business Days preceding the first date of such relevant Interest Period to but excluding two U.S. Government Securities Business Days preceding the Latter Interest Payment Date for such Interest Period; provided that the first Observation Period shall be the period from and including two U.S. Government Securities Business Days preceding the settlement date of the Floating Rate Notes to, but excluding, the two U.S. Government Securities Business Days preceding the first Interest Payment Date.

### Business Day Convention
Modified following, unadjusted.

#### Day Count Convention
Actual/360.

#### Calculation Agent
The Bank of New York Mellon.

#### CUSIP

#### ISIN
**The following terms apply to the Notes:**

#### Issuer
Rio Tinto Finance (USA) plc

#### Guarantees
Full and unconditional guarantees of the principal, interest, premium, if any, and any other additional amounts payable in respect of the Notes are given by Rio Tinto plc and Rio Tinto Limited.

#### Ranking
The Notes and guarantees are not secured by any of