Company: RTNTF
Filing Date: 2025-03-13
Form Type: 424B5
Source: 0001104659-25-023282
Chunk: 9

Company: RIO TINTO LTD
Filing Date: 2025-03-13
Form: 424B5
Chunk 9
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 Interest Starts Accruing
March 14, 2025

#### Interest Payment Dates
Semi-annually in arrear on March 12 and September 12 of each year, commencing September 12, 2025.

#### Optional Redemption
The 2027 Notes will be redeemable at our option or at the option of Rio Tinto plc and Rio Tinto Limited, in whole or in part, at any time. Upon redemption, we will pay a redemption price equal to the greater of (x) 100% of the principal amount of the notes to be redeemed and (y) as certified to the trustee by us or Rio Tinto, the sum of the present values of the remaining scheduled payments of principal and interest thereon discounted to the date of redemption on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) at the Treasury Rate plus a spread of 10 basis points less interest accrued at the date of redemption.

See “Description of Guaranteed Notes — Optional Redemption” beginning on page S-24 of this prospectus supplement for more information.

### Business Day Convention
Following, Unadjusted.

#### Day Count Fraction
30/360.

#### CUSIP
76720A AQ9

#### ISIN
US76720AAQ94

#### 2028 Notes

#### Stated Maturity
March 14, 2028

#### Principal Amount of Notes Being Issued
U.S.$750,000,000

#### Issue Price
99.731%

#### Interest Rate
4.500%

#### Date Interest Starts Accruing
March 14, 2025

#### Interest Payment Dates
Semi-annually in arrear on March 14 and September 14 of each year, commencing September 14, 2025.

<div align='center'>S-6</div>

TABLE OF CONTENTS

#### Optional Redemption
The 2028 Notes will be redeemable at our option or at the option of Rio Tinto plc and Rio Tinto Limited, in whole or in part, at any time. Upon redemption, we will pay a redemption price equal to (i) if such redemption occurs prior to February 14, 2028 (the “2028 Par Call Date”), the greater of (x) 100% of the principal amount of the notes to be redeemed and (y) as certified to the trustee by us or Rio Tinto, the sum of the present values of the Remaining Scheduled Payments discounted