Company: CLH
Filing Date: 2025-04-11
Form Type: DEF 14A
Source: 0000822818-25-000011
Chunk: 2

Company: CLEAN HARBORS INC
Filing Date: 2025-04-11
Form: DEF 14A
Chunk 2
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Board”) for use at the annual meeting and any adjournment or postponement thereof. The annual meeting will be held at the Company’s training facility located at 101 Philip Drive, Norwell, Massachusetts, on May 21, 2025, commencing at 10:00 a.m., local time.

#### Proxy Solicitation
For the 2025 annual meeting, we are again using the “notice and access” process permitted by the Securities and Exchange Commission (the “SEC”) to distribute proxy materials to our shareholders. This process allows us to post proxy materials on a designated website and notify shareholders of the availability of such proxy materials on that website by distributing a notice of internet availability of proxy materials, or “e-proxy notice,” rather than mailing hard copies of all of these materials. We believe this process lowers the cost of the annual meeting, expedites receipt of the meeting materials, and preserves natural resources.

The e-proxy notice also includes instructions for how to request a paper copy of our proxy materials or an electronic copy by e-mail. Your request to receive proxy materials in paper form by mail or electronically by e-mail will remain in effect for future meetings until you revoke it.

If your shares are registered directly in your name with our transfer agent, Equiniti Trust Company LLC, you are considered the shareholder of record with respect to those shares and the e-proxy notice is being sent directly to you. As a shareholder of record, you may vote in person at the annual meeting or vote by proxy. Whether or not you plan to attend the annual meeting in person, we urge you to vote by telephone, via the internet, or, if you request a paper copy of the proxy materials, by completing, signing, dating, and returning the proxy card provided. You may revoke your proxy before it is exercised at the annual meeting by delivery of written revocation or a subsequently dated proxy to the Secretary of the Company, by voting again by telephone or via the internet, or by voting in person at the annual meeting. Attendance at the annual meeting will not, by itself, revoke a proxy.

If you are not a shareholder of record but you hold your shares in “street name” (i.e. your shares are held in an account maintained by a broker, bank or other nominee, which is the shareholder of record) you are considered the beneficial owner of such shares and a form of e-proxy notice is being forwarded to you by the broker, bank, or other nominee which is the shareholder of record with respect to those shares.