Company: CLH
Filing Date: 2025-04-11
Form Type: DEF 14A
Source: 0000822818-25-000011
Chunk: 47

Company: CLEAN HARBORS INC
Filing Date: 2025-04-11
Form: DEF 14A
Chunk 47
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 |           — |
| Alan S. McKim       |     | —                |     |           — |
| Sharon M. Gabriel   |     | 30%              |     |         765 |

The share quantity for the 2024 time-based shares was calculated using an average price for the last ten business days in December 2023 and the shares were granted on February 1, 2024.

The time-based shares granted to Messrs. Battles and Gerstenberg vest in equal proportions over five years beginning on February 1, 2025 (subject to continued employment), and the time-based shares granted to Mr. Dugas and Ms. Gabriel vest over five years, with 60% vesting on February 1, 2027 and 20% on February 1st of each of 2028 and 2029 (subject to continued employment).

Mr. McKim did not receive any time-based shares in 2024 given that his interests are already significantly aligned with those of the other shareholders as the Company’s founder and largest individual shareholder. In connection with his appointment as President - Environmental Sales & Services, the C&HC Committee granted Mr. Diderich 11,000 time-based shares on June 1, 2024 which vest annually over three years, subject to continued employment. Going forward, Mr. Diderich will participate in the annual time-based share grants at 40% of his annual salary. The C&HC Committee also granted Ms. Gabriel an additional 3,000 time-based shares on January 1, 2024 as part of a market adjustment and in conjunction with the

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previously noted base salary increase. Ms. Gabriel’s shares will vest annually over three years, subject to continued employment.

#### Benefits
During 2024, the NEOs and other senior executive officers were eligible to participate in the same benefits as other employees of the Company. These benefits include medical and dental coverage; participation in the Company’s health savings plan, including a Company contribution; life insurance equal to one times base salary with a cap of $1.0 million (2x for accidental death); short- and long-term disability insurance; and participation in the Company’s 401(k) Plan, including the Company match of up to $3,200 per year. All of the NEOs, other than Mr. McKim, were eligible to participate in the Company’s new Employee Stock Purchase Plan (“ESPP”) which was approved by