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 (CLH) reported an insider transaction by Co-CEO Eric W. Gerstenberg. On 2026-08-14, he sold 2,500 shares of Common Stock at $321.34 per share in a sale described as an open market or private transaction. Following this sale, he directly holds 56,793 shares of Clean Harbors common stock.
CLEAN HARBORS INC executive Eric W. Gerstenberg, Co-CEO, reported a disposition of 564 shares of common stock on 2026-07-01 coded as a payment of tax liability by withholding securities. The shares were valued at $290.74 per share, and his directly held stake after this event is 59,293 shares. A footnote clarifies the transaction represents tax withholding upon vesting under Rule 16b-3, and another footnote corrects the reported total number of shares held.
Clean Harbors Inc. reported an amended insider transaction by Co-CEO Eric W. Gerstenberg. On 2026-03-18, he executed a sale of 1,000 shares of Common Stock at a price of $293.00 per share in an open market or private transaction. Following this sale, his directly held position is reported as 59,857 shares, with a footnote stating this reflects a correction to the total number of shares held.
Clean Harbors Inc. Co-CEO Eric W. Gerstenberg reported two non-derivative dispositions of common stock on March 13, 2026. The first involved 977 shares used for payment of tax liability by withholding shares upon vesting, at a reference price of $288.93 per share, in accordance with Rule 16b. The second was a disposition of 2,166 shares to the issuer, representing restricted stock forfeited because the company did not achieve performance targets under its Long Term Equity Incentive Program. A separate footnote indicates a correction to the total number of shares held, but the updated post-transaction holdings are not stated in this report.
Clean Harbors Inc Co-CEO Eric W. Gerstenberg reported selling 2,500 shares of common stock on 2026-02-23 in a sale classified as an open market or private transaction at $279.86 per share. Following the sale, he directly holds 64,000 shares, with a footnote indicating this filing corrects the total number of shares held.
CLEAN HARBORS INC executive vice president and chief financial officer Eric J. Dugas reported a Form 4/A amendment detailing a code F transaction. On 2026-07-01, 447 shares of common stock were disposed of at $290.74 per share as a payment of tax liability by withholding of securities incident to vesting in accordance with Rule 16b-3. Following this withholding transaction and a correction, Dugas directly held 17,620 shares of common stock.
CLEAN HARBORS INC executive vice president and chief financial officer Eric J. Dugas reported two dispositions of common stock on March 13, 2026. First, 630 shares were withheld at $288.93 per share to pay tax liability upon vesting of equity awards under Rule 16b-3. Second, 1,324 shares of restricted stock were forfeited back to the company because performance targets under its Long Term Equity Incentive Program were not achieved. A footnote also indicates a correction to the total number of shares held, though the corrected balance is not stated here.
Clean Harbors Inc. executive vice president and chief financial officer Eric J. Dugas reported a sale of 2,788 shares of common stock on 2026-02-20 at $281.31 per share in an open-market or private transaction. Following this transaction, he directly holds 20,021 shares of common stock. The amendment notes a correction to the total number of shares held after the transaction. The Rule 10b5-1 trading-plan checkbox was not marked as applicable.
CLEAN HARBORS INC co-CEO and director Michael Louis Battles reported a Form 4 transaction involving company common stock. On 2026-07-01, 1,032 shares of common stock were withheld at $290.74 per share to pay a tax liability arising from vesting, as described under Rule 16b3. This was a tax-withholding disposition rather than an open-market sale. Following this transaction, Battles directly holds 94,355 shares of CLEAN HARBORS INC common stock.
Clean Harbors Inc. executive George L. Curtis, Executive Vice President (CHESI), reported a Form 4 transaction involving company common stock. On July 1, 2026, 1,757 shares were withheld to pay tax liability associated with vesting of equity awards, at a price of $290.74 per share. After this withholding, Curtis directly held 44,291 shares of common stock. The disclosure states the withholding was incident to vesting in accordance with Rule 16b3, rather than an open-market sale.
Clean Harbors Inc director Andrea Robertson reported selling 789 shares of Common Stock on 2026-08-03 at $314.0100 per share in a sale described as an open market or private transaction. After this trade, she directly owns 8,979 shares of Clean Harbors common stock. The transaction is not indicated as being made under a Rule 10b5-1 trading plan.
On July 17, 2026, Clean Harbors Inc. executive chair and CTO Alan S. McKim reported a tax-withholding disposition of 1,265 shares of common stock at $310.58 per share, used to satisfy tax liabilities on vesting awards under Rule 16b3. After this withholding, he holds 30,154 shares directly and indirectly holds 2,065,368 shares in the McKim 2007 Trust, 67,093 shares in the McKim 2025 Annuity Trust, and 100,000 shares in the McKim 2026 Annuity Trust.
CLEAN HARBORS INC executive Gabriel M. Sharon reported a small tax-related share disposition. On the reported date, 359 shares of Common Stock were withheld at a price of $290.74 per share to cover tax liabilities tied to vesting of equity awards.
After this tax-withholding transaction, Sharon directly holds 20,706 shares of CLEAN HARBORS INC common stock. The filing notes that the withholding was conducted in accordance with Rule 16b-3, indicating it was an administrative, compensation-related event rather than an open-market trade.
CLEAN HARBORS INC executive Brian P. Weber reported a routine tax-related share disposition. On July 1, 2026, 814 shares of common stock were withheld at $290.74 per share to cover tax liabilities tied to vesting, as permitted under Rule 16b-3. Following this withholding, Weber directly holds 47,914 shares of common stock, so the withheld amount represents only a fraction of his overall position and does not reflect an open-market sale.
Clean Harbors Inc executive Rebecca Underwood reported a routine tax-related share disposition. She had 311 shares of Common Stock withheld at $290.74 per share to cover tax liabilities tied to vesting, as permitted under Rule 16b-3. After this withholding, she directly holds 18,373 shares of Clean Harbors common stock.
CLEAN HARBORS INC executive Alan S. McKim reported routine share movements mainly related to tax withholding and trust holdings. The filing shows an F-code transaction where 1,343 shares of common stock were withheld at $290.74 per share to cover a tax liability upon vesting, a non-market disposition under Rule 16b-3.
After this tax-withholding event, McKim directly holds 31,419 common shares. He also has indirect ownership through several trusts, including 2,065,368 shares held by the McKim 2007 Trust, 67,093 shares held by the McKim 2025 Annuity Trust, and 100,000 shares held by the McKim 2026 Annuity Trust.
CLEAN HARBORS INC co-CEO Eric W. Gerstenberg reported a small share disposition related to taxes, not an open-market trade. On July 1, 2026, 564 shares of Common Stock were withheld at $290.74 per share to cover tax obligations tied to vesting equity awards under Rule 16b-3.
After this tax-withholding transaction, Gerstenberg directly holds 38,313 shares of CLEAN HARBORS INC Common Stock. This filing reflects routine equity compensation and associated tax settlement rather than a discretionary buy or sell decision in the open market.
Clean Harbors Inc. executive Charles H. Geer II reported a routine tax-related share disposition. On this Form 4, 40 shares of Common Stock were withheld on July 1, 2026 at $290.74 per share to cover tax liabilities tied to vesting. After this withholding, he directly holds 10,799 shares of Clean Harbors common stock.
CLEAN HARBORS INC Executive Vice President and Chief Financial Officer Eric J. Dugas reported a small share disposition tied to taxes, not a market trade. On this Form 4, 447 shares of common stock were withheld at $290.74 per share to cover tax liability upon vesting, in accordance with Rule 16b3.
After this tax-withholding transaction, Dugas directly holds 13,532 shares of CLEAN HARBORS INC common stock. The filing reflects a routine compensation-related event rather than an open-market purchase or sale.
Clean Harbors Inc. executive Jeroen Diderich reported a tax-related share withholding. On 2026-06-01, 1,717 shares of Common Stock were disposed of at $281.00 per share to cover tax liabilities tied to vesting, in a transaction structured as withholding of shares rather than an open‑market sale. Following this event, he directly held 16,152 shares, which includes 14 shares acquired under the Clean Harbors Employee Stock Purchase Plan.
CLEAN HARBORS INC director Lauren States reported an open-market sale of Common Stock. On May 26, 2026, she sold 789 shares at $286.19 per share. After this transaction, she directly holds 11,359 shares of Clean Harbors common stock.
Willett Robert reported acquisition or exercise transactions in this Form 4 filing.
CLEAN HARBORS INC director Robert Willett received a stock-based compensation grant. He was awarded 652 shares of common stock as restricted stock with no cash paid per share. The award vests 100% on the date of the next annual meeting of shareholders and increases his direct holdings to 10,028 shares of common stock.
Welch John R. reported acquisition or exercise transactions in this Form 4 filing.
Clean Harbors, Inc. director John R. Welch received a grant of 652 shares of restricted common stock as compensation. The award was granted at $0.00 per share and will vest 100% on the date of the next annual meeting of shareholders. Following this grant, Welch directly owns 10,889 shares of Clean Harbors common stock.
Stewart Shelley JR reported acquisition or exercise transactions in this Form 4 filing.
CLEAN HARBORS INC director Stewart Shelley Jr. reported a routine equity award. He received 652 shares of Common Stock as restricted stock granted for his service as a non-employee director.
The restricted stock vests 100% on the date of the next annual meeting of shareholders. Following this award, he directly holds 4,523 shares of Clean Harbors common stock. This was a compensation grant, not an open-market purchase.
States Lauren reported acquisition or exercise transactions in this Form 4 filing.
CLEAN HARBORS INC director Lauren States reported an award of 652 shares of common stock, received as restricted stock with no purchase price. The award vests 100% on the date of the next annual meeting of shareholders. Following this grant, States directly holds 12,148 common shares.
Robertson Andrea reported acquisition or exercise transactions in this Form 4 filing.
Clean Harbors director Andrea Robertson received a grant of 652 shares of common stock as compensation. The award was granted at no cash cost per share and is structured as restricted stock. These shares will vest 100% on the date of the company’s next annual meeting of shareholders.
Following this grant, Robertson directly holds a total of 9,768 shares of Clean Harbors common stock. This is a routine equity award to a non-employee director rather than an open-market purchase or sale.
Reed Marcy L. reported acquisition or exercise transactions in this Form 4 filing.
CLEAN HARBORS INC director Marcy L. Reed received a grant of 652 shares of common stock as restricted stock. The award carries no purchase price and was granted as compensation to a non-employee director. Following this grant, Reed directly holds a total of 5,733 shares of CLEAN HARBORS INC common stock. The restricted stock vests 100% on the date of the company's next annual meeting of shareholders, meaning full ownership transfers at that time if service conditions are met.
Quirk Alison A. reported acquisition or exercise transactions in this Form 4 filing.
Clean Harbors Inc. director Alison A. Quirk received an equity compensation grant of common stock. She was awarded 652 shares of restricted stock at no cash cost, which will vest in full on the date of the next annual meeting of shareholders. Following this award, she directly holds 3,630 shares of Clean Harbors common stock. This is a routine compensation-related grant to a non-employee director, not an open-market purchase or sale.
PRESTON JOHN T reported acquisition or exercise transactions in this Form 4 filing.
Clean Harbors Inc. director John T. Preston reported an equity compensation grant rather than an open-market trade. On May 20, 2026, he received an award of 652 shares of Common Stock as restricted stock, with no cash paid per share. According to the footnote, this award will vest 100% on the date of the next annual meeting of shareholders. Following the grant, Preston directly holds 7,044 shares of Clean Harbors common stock.
GALANTE EDWARD G reported acquisition or exercise transactions in this Form 4 filing.
Clean Harbors Inc. director Edward G. Galante received an award of 652 shares of restricted common stock on May 20, 2026 as a grant with no cash price per share. The award vests 100% on the date of the next annual meeting of shareholders. Following this grant, he holds 25,461 common shares directly.
Polito Karyn reported acquisition or exercise transactions in this Form 4 filing.
Clean Harbors director Karyn Polito received an equity grant of 652 shares of Common Stock as restricted stock, with no cash paid per share. The award was granted as compensation for service as a non-employee director and vests 100% on the date of the next annual meeting of shareholders. Following this grant, she directly holds 4,127 shares of Clean Harbors common stock.
CLEAN HARBORS INC director Karyn Polito reported an open-market purchase of 460 shares of Common Stock at $295.13 per share. This trade on May 11 increased her direct holdings to 3,475 shares. The amended Form 4 corrects a clerical error in the transaction code.
Clean Harbors Inc. director Karyn Polito received a grant of 460 shares of Common Stock on May 11, 2026. The shares were awarded at $295.13 per share, described as a grant, award, or other acquisition rather than an open-market purchase. Following this award, Polito directly holds 3,475 shares of Clean Harbors common stock.
CLEAN HARBORS INC director Andrea Robertson reported a charitable stock gift. On May 11, 2026, she transferred 342 shares of Common Stock as a bona fide gift at a stated price of $0.00 per share. After this disposition, she directly holds 9,116 shares of CLEAN HARBORS INC Common Stock.
Clean Harbors CO-CEO Eric W. Gerstenberg reported an open-market sale of 1,000 shares of Common Stock at $293 per share. After this transaction, he directly owns 38,877 shares. The sale represents a relatively small portion of his reported holdings and appears routine in scale.
Clean Harbors Inc. director Marcy L. Reed reported an open-market sale of 836 shares of Common Stock on March 18, 2026 at an average price of $287.94 per share. After this transaction, Reed directly holds 5,081 shares of Clean Harbors common stock.
Clean Harbors EVP Brian P. Weber reported several stock transactions. On March 17, 2026, he executed an open-market sale of 4,683 shares of Common Stock at $293.39 per share and held 48,728 shares directly afterward.
On March 13, 2026, 960 shares were disposed of to cover tax liabilities at $288.93 per share, and 1,869 shares were forfeited back to the company because performance targets under its Long Term Equity Incentive Program were not achieved. These March 13 events were non-market dispositions related to compensation and plan performance.
Clean Harbors executive Rebecca Underwood, President & EVP Facilities, reported two non-market dispositions of common stock tied to equity compensation mechanics.
The filing shows 125 shares withheld to cover tax liabilities upon vesting of stock, and 1,401 restricted shares forfeited because the company did not meet performance targets under its long-term equity incentive program. After these entries, she directly holds 18,684 shares of Clean Harbors common stock.
CLEAN HARBORS INC EVP/CIO (CHESI) Gabriel M. Sharon reported routine non-market share dispositions related to equity compensation. On March 13, 2026, 727 shares of common stock were withheld at $288.93 per share to cover tax liabilities upon vesting, as permitted under Rule 16b-3.
On the same date, an additional 1,401 shares of restricted stock were forfeited back to the company at $0.00 because the company did not achieve performance targets under its Long Term Equity Incentive Program. After these actions, Sharon directly holds 21,065 shares of CLEAN HARBORS common stock.
CLEAN HARBORS INC co-CEO Eric W. Gerstenberg reported routine compensation-related share dispositions. On March 13, 2026, 977 shares of common stock were withheld to cover tax liabilities upon vesting. On the same date, 2,166 shares of restricted stock were forfeited because the company did not achieve performance targets under its Long Term Equity Incentive Program. After these transactions, Gerstenberg directly owned 39,877 shares of common stock.
Clean Harbors Inc. executive and 10% owner reported routine share reductions tied to compensation on 03/13/2026. The EVP, EHS had 18 shares of common stock withheld at $288.93 per share to cover tax liabilities when equity vested, and 368 restricted shares were forfeited because performance targets under the Long Term Equity Incentive Program were not met. Following these dispositions, the reporting person directly owned 6,648 shares of common stock.
Clean Harbors executive Charles H. Geer II reported a small forfeiture of restricted stock after the company did not achieve certain performance targets under its Long Term Equity Incentive Program. He disposed of 139 shares back to the issuer and now directly holds 10,839 common shares, including 15 acquired through the employee stock purchase plan.
Clean Harbors EVP and CFO Eric J. Dugas reported two non-market share dispositions tied to equity compensation. On 2026-03-13, 630 shares of common stock were withheld at $288.93 per share to cover tax obligations upon vesting, as described in a footnote. On the same date, 1,324 shares of restricted stock were forfeited back to the company at $0.00 because performance targets under its Long Term Equity Incentive Program were not achieved. After these entries, he directly holds 13,979 common shares.
Clean Harbors executive George L. Curtis reported routine share dispositions tied to compensation events. On March 13, 2026, 350 shares of Common Stock were withheld at $288.93 per share to satisfy tax obligations upon vesting. The same day, 1,028 restricted shares were returned to the company at $0.00 after performance targets under its Long Term Equity Incentive Program were not achieved. Following these transactions, Curtis directly holds 46,048 Common Stock shares, which include 11 shares acquired through the Clean Harbors Employee Stock Purchase Plan.
Clean Harbors executive chair and CTO Alan S. McKim reported a routine tax-related share withholding on Common Stock. On March 13, 2026, 1,265 shares were withheld at $288.93 per share to cover tax liabilities upon vesting under Rule 16b-3.
After this transaction, McKim held 32,762 shares directly. He also reported indirect holdings of 67,093 shares through the McKim 2025 Annuity Trust, 100,000 shares through the McKim 2026 Annuity Trust, and 2,065,368 shares through the McKim 2007 Trust.
Clean Harbors Inc. co-CEO Michael Louis Battles reported routine share disposals tied to compensation, not open-market trading. On 2026-03-13, 1,148 shares of Common Stock were withheld at $288.93 per share to cover tax liabilities upon vesting. On the same date, 2,166 restricted shares were returned to the company after performance targets under its Long Term Equity Incentive Program were not achieved. Following these dispositions, Battles directly holds 95,387 Common Stock shares, which the filing notes includes 15 shares acquired through the Clean Harbors Employee Stock Purchase Plan.
Clean Harbors executive Alan S. McKim, through the McKim 2007 Trust, reported an open-market sale of 100,000 shares of Clean Harbors common stock at $292.65 per share on March 4, 2026. After this sale, the McKim 2007 Trust held 2,065,368 shares. Separate from this, indirect holdings included 67,093 shares in the McKim 2025 Annuity Trust and 100,000 shares in the McKim 2026 Annuity Trust, while McKim directly held 34,027 shares of common stock.
Clean Harbors (CLH) co-CEO Eric W. Gerstenberg reported an open-market sale of 2,500 shares of common stock at a price of $279.86 per share. After this transaction, he directly held 43,020 shares. The filing classifies the move as a sale in the open market or a private transaction.
Clean Harbors Inc. executive chair and CTO Alan S. McKim reported indirect transactions in company common stock through related trusts. The McKim 2007 Trust, an entity associated with him, executed an open-market sale of 100,000 shares at $281.14 per share and a separate 10,000-share bona fide charitable gift.
After these transactions, the McKim 2007 Trust held 2,265,368 shares, while the McKim 2025 Annuity Trust held 67,093 shares and McKim held 34,027 shares directly. The filing reflects both a significant indirect sale and a charitable transfer rather than a purchase.
Clean Harbors Inc. executive Gabriel M. Sharon, EVP/CIO (CHESI), reported an open-market sale of 3,540 shares of Clean Harbors common stock. The transaction took place on February 20, 2026 at an average price of $282.07 per share. After this sale, Sharon directly owns 23,193 shares of Clean Harbors common stock.