Company: CLH
Filing Date: 2025-04-11
Form Type: DEF 14A
Source: 0000822818-25-000011
Chunk: 37

Company: CLEAN HARBORS INC
Filing Date: 2025-04-11
Form: DEF 14A
Chunk 37
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          |     | Huntsman Corporation            |     | Stericycle, Inc.             |
| Darling Ingredients Inc.    |     | Iron Mountain, Inc.             |     | Tetra Tech Inc.              |
| EMCOR, Inc.                 |     | KBR, Inc.                       |     | Waste Connections, Inc.      |
| Enviri Corporation          |     | Quanta Services, Inc.           |     | Waste Management, Inc.       |
| GFL Environmental Inc.      |     | Republic Services, Inc.         |     |                              |

In August 2023, the C&HC Committee determined to utilize the peer group above for purposes of 2024 compensation benchmarking. At time of election, we approximated the peer group 44th percentile with respect to both revenue and market capitalization. The C&HC Committee finds comparative data from our peer group to be helpful in setting and adjusting executive compensation, but it does not target our programs or any particular element of compensation to be at or within a particular percentile or range compared to our peers. The C&HC Committee uses the peer group data along with industry relevant compensation survey sources to ensure that our executive compensation program and its elements are and remain competitive in relation to our industry peers, and applies judgement and discretion in establishing targeted compensation levels taking into account not only competitive market data, but also the experience of the executive, scope of responsibility, critical skill sets, and expertise.

In May 2024, the C&HC Committee reassessed the peer group to more closely align the group with the breadth and size of the Company's current operations. Specifically, we added Ecolab Inc. and The Chemours Company and removed EMCOR, Inc, Heritage Crystal Clean, and Stanley Black & Decker Inc. This new peer group was used for 2025 executive compensation benchmarking.

#### Base Salary
As described above under Role of the C&HC Committee, the C&HC Committee recommends on an annual basis to the Company’s full Board the base salary of the Co-CEOs, which base salary is then approved by all the independent directors, and the C&HC Committee reviews and approves the base salary for each of the Company’s other NEOs and senior executives. The C&HC Committee sought to recommend (for the Co-CEOs) and approve (for the other NEOs) base salaries which were approximately within the middle third of the peer group companies described above. The following table sets forth the annual base salaries of our NEOs for those