Company: CODI-PB
Filing Date: 2025-08-11
Form Type: NT 10-Q
Source: 0001345126-25-000046
Chunk: 0

Company: Compass Diversified Holdings
Filing Date: 2025-08-11
Form: NT 10-Q
Chunk 0
---
#### SEC File Number: 00134927

#### CUSIP Number: 20451Q104

### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549

#### SCHEDULE 12b-25

### NOTIFICATION OF LATE FILING
| (Check one) |     | ¨                                
 ¨                                
 For period ended: June 30, 2025  |     | Form 10-K                       
 Form N-SAR                      |     | ¨ 
 ¨ |     | Form 20-F  
 Form N-CSR |     | ¨ |     | Form 11-K |     | ý |     | Form 10-Q |
|:------------|:----|:---------------------------------|:----|:--------------------------------|:----|:--|:----|:-----------|:----|:--|:----|:----------|:----|:--|:----|:----------|
|             |     | ¨                                |     | Transition Report on Form 10-K  |     |   |     |            |     |   |     |           |     |   |     |           |
|             |     | ¨                                |     | Transition Report on Form 20-F  |     |   |     |            |     |   |     |           |     |   |     |           |
|             |     | ¨                                |     | Transition Report on Form 11-K  |     |   |     |            |     |   |     |           |     |   |     |           |
|             |     | ¨                                |     | Transition Report on Form 10-Q  |     |   |     |            |     |   |     |           |     |   |     |           |
|             |     | ¨                                |     | Transition Report on Form N-SAR |     |   |     |            |     |   |     |           |     |   |     |           |
|             |     | For the Transition Period Ended: |     |                                 |     |   |     |            |     |   |     |           |     |   |     |           |

| Nothing in the form shall be construed to imply that the Commission has verified any information contained herein. |

If the notification relates to a portion of the filing checked above, identify the Item(s) to which the notification relates:

# PART I

### REGISTR