Company: XCH
Filing Date: 2025-09-23
Form Type: 6-K
Source: 0001193125-25-212182
Chunk: 0

Company: XCHG Ltd
Filing Date: 2025-09-23
Form: 6-K
Chunk 0
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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: 001-42208 XCHG Limited (Exact Name of Registrant as Specified in Its Charter) XCharge Europe GmbH, Heselstücken 18, 22453 Hamburg, Germany XCharge Energy USA Inc, 19121 Marketplace Avenue, Building 2-Suite 2-145, Kyle, TX 78640, United States (Address of principal executive offices) Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.

| Form 20-F  ☒ |     | Form 40-F  ☐ |

EXHIBIT INDEX

| Exhibit No. |     | Description   |
| 99.1        |     | Press Release |

SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

| Date: September 23, 2025 |     | XCHG Limited 
 By:          |     | /s/ Yifei Hou                    |
|:-------------------------|:----|:-------------|:----|:---------------------------------|
|                          |     |              |     | Name: Yifei Hou                  |
|                          |     |              |     | Title:   Chief Executive Officer |