Company: BIP-PB
Filing Date: 2025-09-25
Form Type: 6-K
Source: 0001104659-25-093036
Chunk: 0

Company: Brookfield Infrastructure Partners L.P.
Filing Date: 2025-09-25
Form: 6-K
Chunk 0
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<div align='center'>UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of September 2025

Commission file number 001-33632

BROOKFIELD INFRASTRUCTURE PARTNERS L.P.

(Exact name of Registrant as specified in its charter)

73 Front Street, Fifth Floor

Hamilton, HM 12

Bermuda

(Address of principal executive office)</div>

Indicate by check mark whether the registrant files or will file annual
reports under cover of Form 20-F or Form 40-F.

<div align='center'>Form 20-FxForm 40-F ¨

Exhibit Index</div>

| Exhibit 
 99.1    
 99.2    |     | Description                                                                                                                                                                                                                                                                                                                                                                                        
 Fifteenth Supplemental Indenture dated September 24, 2025, by and among Brookfield Infrastructure Finance ULC, Brookfield Infrastructure Finance LLC, Brookfield Infrastructure Finance Limited and Brookfield Infrastructure Finance Pty Ltd, as issuers, Computershare Trust Company of Canada, as trustee (the “Fifteenth Supplemental Indenture”).                                             
 Sixteenth Supplemental Indenture dated September 24, 2025, by and among Brookfield Infrastructure Finance ULC, Brookfield Infrastructure Finance LLC, Brookfield Infrastructure Finance Limited and Brookfield Infrastructure Finance Pty Ltd, as issuers, Computershare Trust Company of Canada, as trustee (the “Sixteenth Supplemental Indenture”).                                             |
|:--------|:----|:---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 99.3    |     | Guarantee, dated September 24, 2025, by and among Brookfield Infrastructure Partners L.P., Brookfield Infrastructure L.P., BIP Bermuda Holdings I Limited, Brookfield Infrastructure Holdings (Canada) Inc., Brookfield Infrastructure LLC, and BIPC Holdings Inc. and Computershare Trust Company of Canada, as trustee, relating to the notes issued under the Fifteenth Supplemental Indenture. |
| 99.4    |     | Guarantee, dated September 24, 2025, by and among Brookfield Infrastructure Partners L.P., Brookfield Infrastructure L.P., BIP Bermuda Holdings I Limited, Brookfield Infrastructure Holdings