Company: SQM
Filing Date: 2025-04-24
Form Type: 6-K
Source: 0000909037-25-000012
Chunk: 0

Company: CHEMICAL & MINING CO OF CHILE INC
Filing Date: 2025-04-24
Form: 6-K
Chunk 0
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### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION
<div align='center'>Washington, D.C. 20549</div>

#### Form 6-K
<div align='center'>REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE

SECURITIES EXCHANGE ACT OF 1934

For the month of April 2025.

Commission File Number 33-65728

CHEMICAL AND MINING COMPANY OF CHILE INC.

(Translation of registrant’s name into English)

El Trovador 4285, Santiago, Chile (562) 2425-2000

(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.

Form 20-F:_ X _ Form 40-F

### SQM FILES TECHNICAL REPORT SUMMARIES

#### Santiago, Chile, April 23, 2025 –
Sociedad Química y Minera de Chile S.A. ( SQM or the “Company”) issued technical report summaries for the Mount Holland lithium project (the “Technical Report Summaries”). The Technical Report Summaries and the consent of Qulified Person are filed as Exhibits 96.5 and 23.9 respectively, to this Report on Form 6-K and incorporated herein by reference.

#### Exhibits
| 23.9 |     | Consent of GeoInnova, regarding the Mount Holland lithium project Technical Report Summary                                           |
| 96.5 |     | Technical Report Summary regarding the Mount Holland lithium project, prepared by GeoInnova Consultores, for SQM, dated April 23,205 |

### SIGNATURES
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: April 23, 2025 |     | CHEMICAL AND MINING COMPANY OF CHILE INC. 
 (Registrant)                              
 /s/ Gerardo Illanes                       |
|:---------------------|:----|:------------------------------------------|
|                      |     | By: Gerardo Illanes                       |
|                      |     | CFO                                       |