Every Form 4 that Clean Harbors Inc (CLH) has filed with the SEC in the last 12 months is listed below, newest first, and each one links through to the document itself with the summary and the scores our analysis gives it.
A Form 4 covers the transactions officers, directors and large holders report, so if you follow CLH and want that one kind of document rather than the whole filing history, this is the page to keep. The company's other filings, of every form, are on the full CLH filings page.
CLEAN HARBORS INC executive Eric J. Dugas, the EVP and Chief Financial Officer, sold Common Stock in an open-market transaction. He sold 2,788 shares at a price of $281.31 per share on February 20, 2026. After this sale, he directly owned 15,933 shares of CLEAN HARBORS INC common stock.
Clean Harbors Inc. director John R. Welch sold 750 shares of common stock in an open-market transaction at a price of $273.07 per share. After this sale, he directly owned 10,237 shares of Clean Harbors common stock.
Clean Harbors, Inc. co-CEO and director Michael Louis Battles reported routine equity compensation activity. On 02/01/2026 he received two grants of common stock: 10,290 performance-based restricted shares and 10,690 time-based restricted shares, both at a reported price of $0 per share.
On 02/02/2026, 5,205 shares were withheld at $259.91 per share to satisfy tax liabilities tied to vesting, in accordance with Rule 16b-3. After these transactions, Battles directly beneficially owned 98,686 shares of Clean Harbors common stock.
Clean Harbors executive Brian P. Weber reported several equity transactions in company stock. On 02/02/2026, 1,394 shares of common stock were withheld at $259.91 per share to cover tax liabilities related to vesting, leaving 52,018 directly owned shares after that transaction.
On 02/01/2026, he received 3,166 performance-based restricted shares and 1,056 time-based restricted shares at no cost. The performance award is scheduled to vest 50% on 3/15/2028 and 50% on 3/15/2029, subject to goals for the 2027 performance period. The time-based award vests in four equal annual installments starting February 1, 2027. Following these grants, Weber directly owns 56,240 common shares.
Clean Harbors, Inc. executive Rebecca Underwood, President & EVP Facilities, reported routine equity activity in company common stock. On February 1, 2026, she received 2,513 performance-based restricted stock shares and 838 time-based restricted stock shares, both at $0 per share as awards.
On February 2, 2026, 425 shares were withheld at $259.91 per share to cover tax liabilities related to vesting, as permitted under Rule 16b-3. After these transactions, she directly beneficially owned 20,210 shares of Clean Harbors common stock.
Clean Harbors (CLH) executive Robert W. Harrison, EVP EHS, reported equity compensation and related tax withholding transactions. On 02/01/2026 he received 1,003 shares as a performance-based restricted stock award that will vest 50% on 3/15/2028 and 50% on 3/15/2029, based on goals for the 2027 performance period.
He also received 430 shares as a time-based restricted stock award vesting 25% annually from February 1, 2027 through February 1, 2030. On 02/02/2026, 184 shares were withheld at $259.91 per share to cover tax liabilities from vesting. After these transactions, he directly owned 7,034 common shares.
Clean Harbors, Inc. co-CEO Eric W. Gerstenberg reported several equity compensation moves and related tax withholding. On February 1, 2026, he received 10,290 shares of performance-based restricted stock and 10,690 shares of time-based restricted stock at $0 per share. On February 2, 2026, 4,934 shares were withheld at $259.91 per share to cover tax liabilities tied to vesting. After these transactions, he directly held up to 66,500 shares of Clean Harbors common stock. The performance-based award is scheduled to vest in two equal parts in 2028 and 2029, subject to goal achievement, while the time-based award vests in four equal annual installments from 2027 through 2030.
Clean Harbors EVP Industrial Services Charles H. Geer II reported routine equity transactions in company common stock. On February 1, 2026, he received two stock awards: 1,843 shares as a performance-based restricted stock award and 503 shares as a time-vesting restricted stock award, both at no cash cost.
On February 2, 2026, 197 shares were withheld at $259.91 per share to cover tax liabilities related to vesting, as permitted under Rule 16b-3. After these transactions, he directly held 10,963 shares of Clean Harbors common stock.
Clean Harbors executive Sharon M. Gabriel, EVP/CIO (CHESI), reported several stock transactions in early February 2026. On February 1, 2026, she received two awards of common stock: 2,073 shares from a performance-based restricted stock award and 566 shares from a time-based restricted stock award, both at $0 per share.
The performance-based award will vest 50% on March 15, 2028 and 50% on March 15, 2029, depending on meeting goals for the period from January 1, 2027 through December 31, 2027. The time-based award vests 25% each on February 1 of 2027, 2028, 2029, and 2030.
On February 2, 2026, 508 shares of common stock were withheld at $259.91 per share to cover tax liabilities upon vesting, in accordance with Rule 16b-3. After these transactions, Gabriel directly owned 26,733 common shares of Clean Harbors.
Clean Harbors EVP and CFO Eric J. Dugas reported several equity-related transactions in company common stock. On 02/02/2026, 567 shares were withheld at $259.91 per share to cover tax obligations tied to vesting under Rule 16b-3.
On 02/01/2026, he received a performance-based restricted stock award of 3,066 shares, vesting 50% on 3/15/2028 and 50% on 3/15/2029, subject to performance goals for the 1/1/2027–12/31/2027 period. He also received a time-based restricted stock award of 1,022 shares, vesting in four equal annual installments from February 1, 2027 through February 1, 2030. Following these transactions, he directly owned 22,809 shares of Clean Harbors common stock.
Clean Harbors executive Jeroen Diderich reported equity compensation and a small tax-related share withholding. On 02/01/2026 he received 3,141 shares of common stock as a performance-based restricted stock award that will vest 50% on 3/15/2028 and 50% on 3/15/2029, tied to goals for the 1/1/2027–12/31/2027 performance period. He also received a 1,047-share restricted stock award vesting 25% annually on February 1 of 2027, 2028, 2029 and 2030. On 02/02/2026, 105 shares were withheld at $259.91 per share to cover tax liabilities upon vesting, leaving him with 13,667, 16,808 and then 17,855 directly owned shares after the respective transactions.
CLEAN HARBORS INC executive George L. Curtis reported a small share withholding to cover taxes. On February 2, 2026, 249 shares of Common Stock were withheld at $259.91 per share, coded as an F transaction.
This withholding satisfied tax liability related to vesting of securities in accordance with Rule 16b-3. After this transaction, Curtis directly beneficially owned 47,415 shares of Clean Harbors common stock.
Clean Harbors Inc. executive EVP/CIO (CHESI) reported a routine insider transaction involving company common stock. On 01/02/2026, 525 shares of Clean Harbors common stock were withheld at a price of $234.48 per share, coded as an “F” transaction, which indicates shares were withheld to cover tax liabilities upon vesting of equity awards rather than sold in the open market. After this withholding, the reporting person beneficially owned 27,241 shares directly.
Clean Harbors Inc. director reports charitable stock gift. A company director reported a transaction dated 12/17/2025 involving common stock of Clean Harbors Inc. The filing shows a charitable gift of 415 shares, coded as a gift transaction, at a reported price of $0 per share. After this transfer, the director directly beneficially owns 10,987 shares of Clean Harbors common stock. The transaction is reported as being filed by one reporting person and reflects a personal transfer rather than a market sale.
Clean Harbors, Inc. officer Rebecca Underwood, President & EVP Facilities, reported a small tax-related share withholding. On 12/15/2025, 51 shares of common stock were disposed of at $240.71 per share under transaction code “F,” with the explanation stating this represented payment of tax liability by withholding securities upon vesting of equity awards in accordance with Rule 16b-3.
After this transaction, she directly beneficially owns 17,284 shares of Clean Harbors common stock. This reflects a routine insider tax-withholding event rather than an open-market purchase or sale.
Clean Harbors Inc. executive vice president of EHS reported a small, tax-related stock disposition. On 12/15/2025, 16 shares of common stock were withheld at a price of $240.71 per share to pay tax liabilities arising from vesting equity awards, consistent with Rule 16b-3. After this transaction, the officer directly owns 5,785 shares of Clean Harbors common stock.
Clean Harbors Inc. reported an insider equity transaction by its Executive Vice President of Industrial Services. On 12/15/2025, the officer had 28 shares of common stock withheld at a price of $240.71 per share.
The filing explains this was a payment of tax liability by withholding shares incident to the vesting of previously granted securities, in line with Rule 16b-3. After this tax-related withholding, the executive directly beneficially owns 8,814 shares of Clean Harbors common stock.
Clean Harbors Inc. co-CEO Eric W. Gerstenberg reported selling 601 shares of common stock on December 16, 2025 at a price of $240.9 per share. After this insider sale, he beneficially owns 50,454 shares of Clean Harbors common stock held directly.
Clean Harbors Inc. executive vice president (CHESI) reported a charitable gift of company stock. On 12/09/2025, the officer made a Form 4 filing showing a disposition of 1,000 shares of Clean Harbors common stock coded as a charitable gift, at a reported price of $0. After this transaction, the officer directly beneficially owns 47,664 shares of Clean Harbors common stock.
Clean Harbors Inc. executive reports small share withholding for taxes. An officer of CLEAN HARBORS INC (CLH), serving as EVP, EHS, reported a Form 4 transaction dated 12/01/2025. The filing shows a disposition of 122 shares of common stock at $228.54 per share, coded as transaction type “F,” which the notes explain was a share withholding to cover tax liabilities on vesting equity under Rule 16b-3.
Following this tax-related transaction, the reporting person directly beneficially owns 5,801 shares of Clean Harbors common stock. This type of event is a routine administrative adjustment tied to equity compensation rather than an open-market purchase or sale.
Clean Harbors (CLH) reported an insider transaction by director Lauren States. On 11/13/2025, she made a bona fide charitable gift (Code G) of 245 shares of common stock at $0, lowering her directly owned stake to 11,496 shares after the transaction. This was a non-cash transfer and reflects a personal donation rather than an open-market trade.
Clean Harbors, Inc. (CLH) reported an insider transaction by its EVP, Industrial Services. On 11/01/2025, the officer had 294 shares withheld at $210.51 per share to cover taxes upon vesting, coded “F” under Rule 16b-3.
Following the transaction, the officer beneficially owned 8,842 shares directly. This filing reflects administrative share withholding for tax purposes rather than an open-market trade.
Alan S. McKim, Executive Chairman and CTO of Clean Harbors, reported multiple dispositions of Common Stock on 09/16/2025 coded as G (gifts) at a reported price of $0. Reported disposals were 8,567, 4,283 and 34,027 shares. The filing shows continued indirect beneficial ownership positions, including 2,346,744 and 2,342,461 shares via the McKim 2007 Trust and 100,000 shares via the McKim 2025 Annuity Trust. The form was signed by an attorney-in-fact on 09/17/2025.