Company: CLH
Filing Date: 2025-04-11
Form Type: DEF 14A
Source: 0000822818-25-000011
Chunk: 56

Company: CLEAN HARBORS INC
Filing Date: 2025-04-11
Form: DEF 14A
Chunk 56
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 |        |     |         |     |                                                        765 |     |                                          |           |   132,054 |

(1) Amounts include both the Annual MIP Bonus and the SEIP Bonus as discussed in Compensation Discussion and Analysis-Performance-Based Cash Bonuses above. SEIP Bonuses are included at 100% of potential achievement in all columns.

(2) The amounts reported represent the threshold, target, and maximum number of performance-based restricted shares granted to NEOs in 2024. These awards will vest and be earned only if certain performance goals are achieved as described in the Compensation Discussion and Analysis - Long-Term Equity Incentives above.

(3) The grant date fair values of restricted stock awards are computed in accordance with FASB ASC Topic 718. For a description of the assumptions used in determining these values, see Note 17, “Stock-Based Compensation,” to the financial statements in the Company’s Annual Report on Form 10-K for the year ended December 31, 2024. The values reported for the performance based restricted stock awards represent the grant date fair values of such stock awards assuming the probable outcome of the performance conditions. The values of such awards assuming the maximum achievement of the applicable performance conditions are reported in footnote 2 to the 2024 Summary Compensation Table above.

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#### Outstanding Equity Awards at Fiscal Year-End
The following table sets forth the outstanding equity awards held at December 31, 2024 by each of the NEOs, which consisted of (i) unvested time-vesting restricted shares, (ii) performance-based restricted shares for which the performance goals had been satisfied but remained subject to vesting based on continued employment requirements, and (iii) performance-based restricted shares for which the performance goals had not yet been satisfied but remained eligible for potential future vesting upon satisfaction of both performance goals and continued employment requirements.

|                     |     |            |     | Stock Awards                                                          |        |     |     |     |                                                                                          |           |     |                               |       |     |    |     |         |
| Name                |     | Grant Date |     | Number of                                                             
 Shares or Units of Stock that                                         
 Have Not                                                              
 Vested                                                                
 (#)                                                                   |        |     |     |     | Market Value of Shares or Units of Stock that Have Not Vested(1)                         
 ($)                                                                                      |           |     | Equity Incentive Plan Awards: |       |     |