BetaInsiders sold $63.4M in the past 12 months.0% was sold under disclosed trading plans, 100% with no plan disclosed. The largest seller, Alan McKim (Exec Chair, CTO., Director), sold $57.4M.Share-of-stake figures for this company are being verified and will be added when that check is finished. Why
A share of stake is shown for 0 of the 9 officers and directors who sold. 22 are left out Disclosed company stock is not an insider's whole wealth.i
Left out: Alan McKim, Michael Battles, Brian Weber, Eric Gerstenberg, George Curtis, Sharon Gabriel, Edward Galante, Eric Dugas, Rebecca Underwood, Robert Speights, Jeroen Diderich, Lauren States, John Welch, Andrea Robertson, Robert Willett, Charles Geer II, John Preston, Robert Harrison, Marcy Reed, Shelley Stewart Jr., Karyn Polito and Alison Quirk (share of stake is being verified).
Officers and directors, past 12 months. Their share of stake is being verified and is not shown yet; amounts and trading plans are below.
Officers and directors, Oct 2025 to Oct 2026. Each sale is counted once: under a disclosed plan, else to cover taxes, else no plan disclosed.
No officer or director trades were reported for the past 30 days. The most recent before that:
| Who | Shares | Price | % of total stake | Total stake after | Trade date | Filed |
|---|---|---|---|---|---|---|
| Eric Gerstenberg Co-CEO | 2,500 | $321.34 | n/a | n/a | Aug 14, 2026 | Aug 18, 2026 |
No. Michael Battles reported no open-market sales in the past 12 months.
Filings rarely give a reason, and we don't guess at one. What they show is how the sales were made: 0% of sales by value ran under 10b5-1 trading plans disclosed in the filings and 100% had no disclosed plan. A trading plan schedules sales in advance.
Yes. 1 officer or director reported 1 purchase in the past 12 months (Form 4 code P; rows the filings describe as reinvested dividends, plan purchases, private deals or moves into the person's own trust are not counted).
| Who sold | Amount | % of holdings | Trading plan |
|---|---|---|---|
| Alan McKim Exec Chair, CTO., Director | $57.4M 200K shares | Not confirmedshare of stake is being verified. Why | No plan disclosed |
| Eric Gerstenberg Co-CEO | $1.9M 6.6K shares | Not confirmedshare of stake is being verified. Why | No plan disclosed |
| Brian Weber EVP (Chesi) | $1.4M 4.7K shares | Not confirmedshare of stake is being verified. Why | No plan disclosed |
| Sharon Gabriel EVP/CIO (Chesi) | $999K 3.5K shares | Not confirmedshare of stake is being verified. Why | No plan disclosed |
| Eric Dugas EVP Chief Financial Officer | $784K 2.8K shares | Not confirmedshare of stake is being verified. Why | No plan disclosed |
| Andrea Robertson Director | $248K 789 shares | Not confirmedshare of stake is being verified. Why | No plan disclosed |
| Marcy Reed Director | $241K 836 shares | Not confirmedshare of stake is being verified. Why | No plan disclosed |
| Lauren States Director | $226K 789 shares | Not confirmedshare of stake is being verified. Why | No plan disclosed |
| John Welch Director | $205K 750 shares | Not confirmedshare of stake is being verified. Why | No plan disclosed |
Vested shares across all share classes, held directly and through trusts, LLCs and family members, as reported on SEC Forms 3, 4 and 5. Unvested awards and options are never counted as owned shares.
| Insider | Held Oct 13, 2025 | Sold | Held Oct 13, 2026 | Still held |
|---|---|---|---|---|
Alan McKim!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Alan McKim are complete. Exec Chair, CTO., Director | n/a | −200K | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Alan McKimHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Alan McKim are complete; balances and unit counts will be added when the check is finished. −10Kgifted (net of own trusts) −3.9Kwithheld by the company for taxes | ||||
Michael Battles!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Michael Battles are complete. Co-CEO, Director | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Michael BattlesHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Michael Battles are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) −7.4Kwithheld by the company for taxes | ||||
Brian Weber!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Brian Weber are complete. EVP (Chesi) | n/a | −4.7K | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Brian WeberHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Brian Weber are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) −3.2Kwithheld by the company for taxes | ||||
Eric Gerstenberg!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Eric Gerstenberg are complete. Co-CEO | n/a | −6.6K | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Eric GerstenbergHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Eric Gerstenberg are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) −6.5Kwithheld by the company for taxes | ||||
George Curtis!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for George Curtis are complete. Exec. Vice President (Chesi) | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for George CurtisHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for George Curtis are complete; balances and unit counts will be added when the check is finished. −1Kgifted (net of own trusts) −2.4Kwithheld by the company for taxes | ||||
Sharon Gabriel!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. See the filing Sales and other transactions for Sharon Gabriel are complete. EVP/CIO (Chesi) | n/a | −3.5K | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Sharon GabrielHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Sharon Gabriel are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) −2.1Kwithheld by the company for taxes | ||||
Edward Galante!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Edward Galante are complete. Director | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Edward GalanteHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Edward Galante are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Eric Dugas!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Eric Dugas are complete. EVP Chief Financial Officer | n/a | −2.8K | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Eric DugasHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Eric Dugas are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) −1.6Kwithheld by the company for taxes | ||||
Rebecca Underwood!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Rebecca Underwood are complete. President & EVP Facilities | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Rebecca UnderwoodHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Rebecca Underwood are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) −912withheld by the company for taxes | ||||
Robert Speights!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Robert Speights are complete. President, Industrial Services | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Robert SpeightsHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Robert Speights are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Jeroen Diderich!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Jeroen Diderich are complete. EVP&President of Sales&Service | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Jeroen DiderichHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Jeroen Diderich are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) −1.8Kwithheld by the company for taxes | ||||
Lauren States!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Lauren States are complete. Director | n/a | −789 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Lauren StatesHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Lauren States are complete; balances and unit counts will be added when the check is finished. −245gifted (net of own trusts) | ||||
John Welch!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for John Welch are complete. Director | n/a | −750 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for John WelchHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for John Welch are complete; balances and unit counts will be added when the check is finished. −415gifted (net of own trusts) | ||||
Andrea Robertson!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Andrea Robertson are complete. Director | n/a | −789 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Andrea RobertsonHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Andrea Robertson are complete; balances and unit counts will be added when the check is finished. −342gifted (net of own trusts) | ||||
Robert Willett!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Robert Willett are complete. Director | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Robert WillettHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Robert Willett are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Charles Geer II!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Charles Geer II are complete. EVP, Industrial Services | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Charles Geer IIHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Charles Geer II are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) −559withheld by the company for taxes | ||||
John Preston!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for John Preston are complete. Director | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for John PrestonHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for John Preston are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Robert Harrison!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Robert Harrison are complete. EVP, Ehs | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Robert HarrisonHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Robert Harrison are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) −340withheld by the company for taxes | ||||
Marcy Reed!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Marcy Reed are complete. Director | n/a | −836 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Marcy ReedHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Marcy Reed are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Shelley Stewart Jr.!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Shelley Stewart Jr. are complete. Director | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Shelley Stewart Jr.Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Shelley Stewart Jr. are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Karyn Polito!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Karyn Polito are complete. Director | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Karyn PolitoHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Karyn Polito are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Alison Quirk!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Alison Quirk are complete. Director | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Alison QuirkHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Alison Quirk are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Holdings and share of stake for Clean Harbors Inc are being verified, so no balances, unit counts or percentages are shown. Sales, proceeds, plan and tax status, titles and dates come straight from individual filings.
Officer and director open-market sales: $63.4M across 220,776 shares. Plan status and stated purpose are separate questions, and a sale can have both.
Sales with no 10b5-1 plan and no tax reference in the filing. $57.4M of it is Alan McKim. No plan disclosed is a statement about the filing, not about why the sale happened. Largest such sale: Alan McKim, Mar 4, 2026
30,653 shares ($8.4M) were withheld by the company for taxes, which isn't a market sale.
1 officer or director bought shares in this period, in 1 trade(Form 4 code P, leaving out rows the filings describe as reinvested dividends, plan purchases, private deals or moves into the person's own trust). Across all their filings on record there are 10 purchase trades.
Gifts the filings describe as charitable. Gifts are not sales and are not included in the sale totals.
| Seller | Shares sold | Proceeds | Under a disclosed plan | Share of total | Sales dates |
|---|---|---|---|---|---|
| Alan McKim Exec Chair, CTO., Director | 200K | $57.4M | 0% | 91% | Feb 19, 2026 to Mar 4, 2026 |
| Eric Gerstenberg Co-CEO | 6.6K | $1.9M | 0% | 3% | Dec 16, 2025 to Aug 14, 2026 |
| Brian Weber EVP (Chesi) | 4.7K | $1.4M | 0% | 2% | Mar 17, 2026 to Mar 17, 2026 |
| Sharon Gabriel EVP/CIO (Chesi) | 3.5K | $999K | 0% | 2% | Feb 20, 2026 to Feb 20, 2026 |
| Eric Dugas EVP Chief Financial Officer | 2.8K | $784K | 0% | 1% | Feb 20, 2026 to Feb 20, 2026 |
| Andrea Robertson Director | 789 | $248K | 0% | 0.4% | Aug 3, 2026 to Aug 3, 2026 |
| Marcy Reed Director | 836 | $241K | 0% | 0.4% | Mar 18, 2026 to Mar 18, 2026 |
| Lauren States Director | 789 | $226K | 0% | 0.4% | May 26, 2026 to May 26, 2026 |
| John Welch Director | 750 | $205K | 0% | 0.3% | Feb 19, 2026 to Feb 19, 2026 |
| Month | Sale proceeds | Disclosed plan | To cover taxes | No plan disclosed |
|---|---|---|---|---|
| Oct 2025 | $0 | $0 | $0 | $0 |
| Nov 2025 | $0 | $0 | $0 | $0 |
| Dec 2025 | $145K | $0 | $0 | $145K |
| Jan 2026 | $0 | $0 | $0 | $0 |
| Feb 2026 | $30.8M | $0 | $0 | $30.8M |
| Mar 2026 | $31.2M | $0 | $0 | $31.2M |
| Apr 2026 | $0 | $0 | $0 | $0 |
| May 2026 | $226K | $0 | $0 | $226K |
| Jun 2026 | $0 | $0 | $0 | $0 |
| Jul 2026 | $0 | $0 | $0 | $0 |
| Aug 2026 | $1.1M | $0 | $0 | $1.1M |
| Sep 2026 | $0 | $0 | $0 | $0 |
| Oct 2026 | $0 | $0 | $0 | $0 |
In line with the past 5 years. 9 insiders sold; the average is 10 a year.
| 12 months ending | Shares sold | Insiders who sold | Proceeds |
|---|---|---|---|
| Oct 13, 2026 Latest 12 months | 221K | 9 | $63.4M |
| Oct 13, 2025 1 year earlier | 181K | 8 | $40.0M |
| Oct 13, 2024 2 years earlier | 265K | 9 | $49.6M |
| Oct 14, 2023 3 years earlier | 229K | 15 | $32.2M |
| Oct 14, 2022 4 years earlier | 72K | 8 | $7.8M |
| Oct 14, 2021 5 years earlier | 163K | 11 | $15.1M |
Open-market sales (Form 4 code S) by people who were officers or directors, in split-adjusted shares. Earlier years include people who have since left. A sale that an outside holder also reports (a family trust, a fund) is counted with outside holders in every year. Shares, not dollars, are compared, so a change in the stock price doesn't look like a change in selling. Years the filings don't fully cover are shown but left out of the average.
Holdings and share of stake are being verified. Balances, unit counts and every share-of-stake figure for Clean Harbors Inc are held back until that check is finished. Sales, proceeds, plan and tax status, titles and dates come straight from individual filings and are complete.
External context: we only cite outside events when a documented connection exists. None is shown for this period.
All 1,915 Forms 3, 4 and 5 on record for Clean Harbors Inc (SEC CIK 822818), filed from Sep 17, 2002 to Aug 18, 2026; 72 of them were filed in the 12 months this page covers, retrieved from SEC EDGAR on Oct 13, 2026. Prices are the ones reported in each filing, often weighted averages. 18 older filings exist only on paper and could not be read.
Probable 2-for-1 stock split on or before Jul 26, 2011 (split date stated in a footnote). Splits aren't reported as transactions; 27 holding lines changed by exactly this ratio, so earlier share counts are restated.
Holdings. Each holding line (a share class plus an owner, such as a trust or LLC) carries its last reported balance forward. Entities first reported during the period start at zero, so transfers between an insider's own trusts don't count as selling. Lines not reported for three years or more are listed separately and left out of totals.
Sales. A sale counts as under a 10b5-1 plan if its footnote cites one or the filing's Rule 10b5-1 box is checked, and as tax-related if its footnote cites tax obligations or sell-to-cover. Shares withheld by the company for taxes are listed separately. Sales with neither attribute are labeled "no plan disclosed".
Spotted something wrong on this page? Report an error. We check every report against the SEC filing and list what we fix in the corrections log.