Clean Harbors (CLH)
Clean Harbors on one page: short interest, daily short volume, fails to deliver, planned sales, large holders, 13F holders, financials, earnings dates and insider trades. Listed on NYSE, classified by the SEC as hazardous waste management.
1.1M
Short interest
settlement 2026-09-30
2.6
Days to cover
-0.7 days vs prior
55.4%
Short share of volume
2026-10-23
15,805
Fails to deliver
settlement 2026-09-21
Wed 28 Oct
Next earnings
estimated date
-$1.1M
Insider flow, 90 days
0 buys, 2 sells
As of 2026-10-23.
Short interest
FINRA, twice a month. The newest 48 settlements in the table, 48 in the chart. JSONAs of 30 September 2026, short interest in CLH is 1,078,261 shares, up 27,362 shares over the last month. Over the last 48 readings it ranged from 404,251 shares (15 October 2024) to 2,216,636 shares (31 October 2025). At the reported average volume of 415K shares a day that is 2.6 days to cover.
Embed this chart.The embed keeps its attribution line.
<iframe src="https://xoomar.com/embed/stocks/clh" width="100%" height="440" style="border:0;max-width:100%" loading="lazy" title="XOOMAR chart"></iframe>
| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-09-30 | 1,078,261 | -4.4% | 414,683 | 2.60 |
| 2026-09-15 | 1,128,021 | +7.3% | 346,102 | 3.26 |
| 2026-08-31 | 1,050,899 | -5.6% | 439,680 | 2.39 |
| 2026-08-14 | 1,113,361 | -15.1% | 425,879 | 2.61 |
| 2026-07-31 | 1,311,094 | +13.7% | 582,115 | 2.25 |
| 2026-07-15 | 1,153,385 | -3.6% | 368,557 | 3.13 |
| 2026-06-30 | 1,197,109 | +3.1% | 493,229 | 2.43 |
| 2026-06-15 | 1,160,698 | +6.7% | 506,787 | 2.29 |
| 2026-05-29 | 1,087,806 | +5.0% | 543,381 | 2.00 |
| 2026-05-15 | 1,036,392 | +27.0% | 763,210 | 1.36 |
| 2026-04-30 | 815,840 | +5.7% | 389,526 | 2.09 |
| 2026-04-15 | 771,700 | -5.6% | 514,903 | 1.50 |
| 2026-03-31 | 817,603 | -9.7% | 523,304 | 1.56 |
| 2026-03-13 | 905,338 | -14.3% | 512,172 | 1.77 |
| 2026-02-27 | 1,056,774 | -0.7% | 720,124 | 1.47 |
| 2026-02-13 | 1,063,775 | -13.8% | 482,220 | 2.21 |
| 2026-01-30 | 1,233,427 | -18.6% | 393,665 | 3.13 |
| 2026-01-15 | 1,516,140 | -11.6% | 480,657 | 3.15 |
| 2025-12-31 | 1,714,536 | -13.4% | 303,531 | 5.65 |
| 2025-12-15 | 1,979,075 | -6.2% | 565,369 | 3.50 |
| 2025-11-28 | 2,110,837 | +0.1% | 646,680 | 3.26 |
| 2025-11-14 | 2,108,535 | -4.9% | 546,637 | 3.86 |
| 2025-10-31 | 2,216,636 | +23.5% | 833,262 | 2.66 |
| 2025-10-15 | 1,794,593 | +20.6% | 529,760 | 3.39 |
| 2025-09-30 | 1,488,158 | +11.3% | 401,292 | 3.71 |
| 2025-09-15 | 1,337,446 | +8.6% | 351,546 | 3.80 |
| 2025-08-29 | 1,231,876 | +0.9% | 265,321 | 4.64 |
| 2025-08-15 | 1,220,494 | +22.1% | 415,633 | 2.94 |
| 2025-07-31 | 999,177 | +33.7% | 434,082 | 2.30 |
| 2025-07-15 | 747,442 | +5.4% | 376,885 | 1.98 |
| 2025-06-30 | 709,439 | -5.3% | 353,596 | 2.01 |
| 2025-06-13 | 749,425 | +2.0% | 306,542 | 2.44 |
| 2025-05-30 | 734,781 | -18.8% | 244,523 | 3.00 |
| 2025-05-15 | 905,069 | +6.4% | 344,787 | 2.63 |
| 2025-04-30 | 850,616 | +7.2% | 481,183 | 1.77 |
| 2025-04-15 | 793,163 | +28.8% | 621,695 | 1.28 |
| 2025-03-31 | 615,677 | -17.8% | 396,387 | 1.55 |
| 2025-03-14 | 748,693 | +28.0% | 583,752 | 1.28 |
| 2025-02-28 | 585,097 | +16.9% | 883,197 | 1.00 |
| 2025-02-14 | 500,283 | -1.1% | 290,598 | 1.72 |
| 2025-01-31 | 505,995 | -13.7% | 337,159 | 1.50 |
| 2025-01-15 | 586,446 | +8.6% | 324,433 | 1.81 |
| 2024-12-31 | 540,110 | -9.3% | 316,551 | 1.71 |
| 2024-12-13 | 595,742 | +1.4% | 271,323 | 2.20 |
| 2024-11-29 | 587,397 | -8.1% | 270,028 | 2.18 |
| 2024-11-15 | 639,347 | +22.3% | 372,158 | 1.72 |
| 2024-10-31 | 522,639 | +29.3% | 335,778 | 1.56 |
| 2024-10-15 | 404,251 | -16.1% | 222,796 | 1.81 |
Daily short volume
FINRA Reg SHO, the last 30 sessions. JSONAs of 23 October 2026, the short share of CLH volume is 55.4%, down 4.9 points over the last five sessions. Over the last 30 readings it ranged from 32.2% (15 October 2026) to 70.8% (8 October 2026). The latest reading is in line with the 30-session average of 53.9%, on 164K shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-10-23 | 91K | 164K | 55.4% | 0 |
| 2026-10-22 | 73K | 137K | 53.5% | 1,353 |
| 2026-10-21 | 59K | 123K | 47.8% | 0 |
| 2026-10-20 | 57K | 120K | 47.9% | 2 |
| 2026-10-19 | 46K | 89K | 51.7% | 0 |
| 2026-10-16 | 66K | 110K | 60.3% | 72 |
| 2026-10-15 | 89K | 276K | 32.2% | 4 |
| 2026-10-14 | 88K | 188K | 46.7% | 0 |
| 2026-10-13 | 52K | 104K | 50.1% | 0 |
| 2026-10-12 | 74K | 160K | 46.4% | 75 |
| 2026-10-09 | 52K | 92K | 56.5% | 0 |
| 2026-10-08 | 53K | 75K | 70.8% | 0 |
| 2026-10-07 | 86K | 147K | 58.6% | 0 |
| 2026-10-06 | 71K | 152K | 46.7% | 140 |
| 2026-10-05 | 95K | 167K | 57.0% | 4 |
| 2026-10-02 | 86K | 129K | 66.7% | 0 |
| 2026-10-01 | 93K | 144K | 64.6% | 0 |
| 2026-09-30 | 82K | 149K | 54.8% | 0 |
| 2026-09-29 | 58K | 132K | 44.3% | 0 |
| 2026-09-28 | 72K | 141K | 51.0% | 10 |
| 2026-09-25 | 79K | 147K | 53.7% | 0 |
| 2026-09-24 | 109K | 177K | 61.4% | 238 |
| 2026-09-23 | 81K | 151K | 53.8% | 0 |
| 2026-09-22 | 73K | 204K | 35.9% | 1,876 |
| 2026-09-21 | 88K | 202K | 43.8% | 0 |
| 2026-09-18 | 79K | 115K | 68.8% | 0 |
| 2026-09-17 | 65K | 130K | 50.1% | 0 |
| 2026-09-16 | 101K | 166K | 60.9% | 0 |
| 2026-09-15 | 80K | 129K | 62.2% | 12 |
| 2026-09-14 | 88K | 140K | 62.9% | 10 |
Fails to deliver
SEC, the last 30 settlement dates with a fail. JSONAs of 21 September 2026, the fails-to-deliver balance in CLH is 15,805 shares, up 3,021 shares over the last settlement date. Over the last 30 readings it ranged from 3 shares (23 March 2026) to 22,978 shares (14 January 2026).
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-09-21 | 15,805 | $315.80 | $5.0M |
| 2026-09-18 | 12,784 | $315.55 | $4.0M |
| 2026-07-28 | 4,113 | $301.75 | $1.2M |
| 2026-07-27 | 4,833 | $303.74 | $1.5M |
| 2026-07-24 | 80 | $306.47 | $25K |
| 2026-07-23 | 1,949 | $306.27 | $597K |
| 2026-07-22 | 80 | $305.16 | $24K |
| 2026-07-20 | 182 | $310.58 | $57K |
| 2026-07-17 | 9 | $310.57 | $3K |
| 2026-07-15 | 10,434 | $305.16 | $3.2M |
| 2026-07-01 | 37 | $298.75 | $11K |
| 2026-06-15 | 78 | $287.78 | $22K |
| 2026-06-04 | 3,309 | $286.63 | $948K |
| 2026-05-26 | 456 | $286.92 | $131K |
| 2026-05-15 | 9 | $308.40 | $3K |
| 2026-05-01 | 3 | $312.68 | $938 |
| 2026-04-06 | 47 | $297.00 | $14K |
| 2026-04-02 | 4 | $290.04 | $1K |
| 2026-03-23 | 3 | $275.88 | $828 |
| 2026-03-02 | 300 | $293.20 | $88K |
| 2026-02-24 | 8 | $280.82 | $2K |
| 2026-02-23 | 188 | $284.69 | $54K |
| 2026-02-09 | 213 | $265.98 | $57K |
| 2026-02-03 | 1,112 | $261.38 | $291K |
| 2026-01-22 | 22 | $261.54 | $6K |
| 2026-01-20 | 91 | $264.08 | $24K |
| 2026-01-14 | 22,978 | $254.08 | $5.8M |
| 2026-01-13 | 185 | $255.59 | $47K |
| 2025-12-29 | 6 | $240.83 | $1K |
| 2025-12-17 | 503 | $240.02 | $121K |
Insider trades
SEC Form 4, newest first. JSONInsiders at CLH reported 2 open-market sells worth $1.1M in the last 90 days and no open-market buys. Latest filing: GERSTENBERG ERIC W (CO-CEO) on 2026-08-14.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-08-14 | GERSTENBERG ERIC W | CO-CEO | Sell | 3K | $321.34 | $803K | 57K |
| 2026-08-03 | Robertson Andrea | Director | Sell | 789 | $314.01 | $248K | 9K |
| 2026-07-17 | MCKIM ALAN S | EXEC CHAIR, CTO. | Tax withholding | 1K | $310.58 | $393K | 30K |
| 2026-07-01 | Geer Charles H. II | EVP, Industrial Services | Tax withholding | 40 | $290.74 | $12K | 11K |
| 2026-07-01 | Underwood Rebecca | PRESIDENT & EVP FACILITIES | Tax withholding | 311 | $290.74 | $90K | 18K |
| 2026-07-01 | Gabriel Sharon M. | EVP/CIO (CHESI) | Tax withholding | 359 | $290.74 | $104K | 21K |
| 2026-07-01 | Dugas Eric J. | EVP CHIEF FINANCIAL OFFICER | Tax withholding | 447 | $290.74 | $130K | 14K |
| 2026-07-01 | Weber Brian P | EVP (CHESI) | Tax withholding | 814 | $290.74 | $237K | 48K |
| 2026-07-01 | GERSTENBERG ERIC W | CO-CEO | Tax withholding | 564 | $290.74 | $164K | 38K |
| 2026-07-01 | MCKIM ALAN S | EXEC CHAIR, CTO. | Tax withholding | 1K | $290.74 | $390K | 31K |
| 2026-07-01 | CURTIS GEORGE L | EXEC. VICE PRESIDENT (CHESI) | Tax withholding | 2K | $290.74 | $511K | 44K |
| 2026-07-01 | Battles Michael Louis | CO-CEO | Tax withholding | 1K | $290.74 | $300K | 94K |
| 2026-06-01 | Diderich Jeroen | EVP&President of Sales&Service | Tax withholding | 2K | $281.00 | $482K | 16K |
| 2026-05-26 | States Lauren | Director | Sell | 789 | $286.19 | $226K | 11K |
| 2026-05-20 | Polito Karyn | Director | Grant | 652 | $0.00 | $0 | 4K |
| 2026-05-20 | Reed Marcy L. | Director | Grant | 652 | $0.00 | $0 | 6K |
| 2026-05-20 | States Lauren | Director | Grant | 652 | $0.00 | $0 | 12K |
| 2026-05-20 | Welch John R. | Director | Grant | 652 | $0.00 | $0 | 11K |
| 2026-05-20 | Quirk Alison A. | Director | Grant | 652 | $0.00 | $0 | 4K |
| 2026-05-20 | Stewart Shelley JR | Director | Grant | 652 | $0.00 | $0 | 5K |
| 2026-05-20 | Willett Robert | Director | Grant | 652 | $0.00 | $0 | 10K |
| 2026-05-20 | Robertson Andrea | Director | Grant | 652 | $0.00 | $0 | 10K |
| 2026-05-20 | GALANTE EDWARD G | Director | Grant | 652 | $0.00 | $0 | 25K |
| 2026-05-20 | PRESTON JOHN T | Director | Grant | 652 | $0.00 | $0 | 7K |
| 2026-05-11 | Polito Karyn | Director | Buy | 460 | $295.13 | $136K | 3K |
| 2026-05-11 | Robertson Andrea | Director | Gift | 342 | $0.00 | $0 | 9K |
| 2026-05-11 | Polito Karyn | Director | Grant | 460 | $295.13 | $136K | 3K |
| 2026-03-18 | Reed Marcy L. | Director | Sell | 836 | $287.94 | $241K | 5K |
| 2026-03-18 | GERSTENBERG ERIC W | CO-CEO | Sell | 1K | $293.00 | $293K | 39K |
| 2026-03-17 | Weber Brian P | EVP (CHESI) | Sell | 5K | $293.39 | $1.4M | 49K |
| 2026-03-13 | Geer Charles H. II | EVP, Industrial Services | Returned to company | 139 | $0.00 | $0 | 11K |
| 2026-03-13 | Underwood Rebecca | PRESIDENT & EVP FACILITIES | Returned to company | 1K | $0.00 | $0 | 19K |
| 2026-03-13 | Underwood Rebecca | PRESIDENT & EVP FACILITIES | Tax withholding | 125 | $288.93 | $36K | 20K |
| 2026-03-13 | Harrison Robert W. | EVP, EHS | Returned to company | 368 | $0.00 | $0 | 7K |
| 2026-03-13 | Harrison Robert W. | EVP, EHS | Tax withholding | 18 | $288.93 | $5K | 7K |
| 2026-03-13 | Gabriel Sharon M. | EVP/CIO (CHESI) | Returned to company | 1K | $0.00 | $0 | 21K |
| 2026-03-13 | Gabriel Sharon M. | EVP/CIO (CHESI) | Tax withholding | 727 | $288.93 | $210K | 22K |
| 2026-03-13 | Dugas Eric J. | EVP CHIEF FINANCIAL OFFICER | Returned to company | 1K | $0.00 | $0 | 14K |
| 2026-03-13 | Dugas Eric J. | EVP CHIEF FINANCIAL OFFICER | Tax withholding | 630 | $288.93 | $182K | 15K |
| 2026-03-13 | Weber Brian P | EVP (CHESI) | Returned to company | 2K | $0.00 | $0 | 53K |
| 2026-03-13 | Weber Brian P | EVP (CHESI) | Tax withholding | 960 | $288.93 | $277K | 55K |
| 2026-03-13 | CURTIS GEORGE L | EXEC. VICE PRESIDENT (CHESI) | Returned to company | 1K | $0.00 | $0 | 46K |
| 2026-03-13 | CURTIS GEORGE L | EXEC. VICE PRESIDENT (CHESI) | Tax withholding | 350 | $288.93 | $101K | 47K |
| 2026-03-13 | GERSTENBERG ERIC W | CO-CEO | Returned to company | 2K | $0.00 | $0 | 40K |
| 2026-03-13 | GERSTENBERG ERIC W | CO-CEO | Tax withholding | 977 | $288.93 | $282K | 42K |
| 2026-03-13 | MCKIM ALAN S | EXEC CHAIR, CTO. | Tax withholding | 1K | $288.93 | $365K | 33K |
| 2026-03-13 | Battles Michael Louis | CO-CEO | Returned to company | 2K | $0.00 | $0 | 95K |
| 2026-03-13 | Battles Michael Louis | CO-CEO | Tax withholding | 1K | $288.93 | $332K | 98K |
| 2026-03-04 | MCKIM ALAN S | EXEC CHAIR, CTO. | Sell | 100K | $292.65 | $29.3M | 2.1M |
| 2026-02-23 | GERSTENBERG ERIC W | CO-CEO | Sell | 3K | $279.86 | $700K | 43K |
| 2026-02-20 | Gabriel Sharon M. | EVP/CIO (CHESI) | Sell | 4K | $282.07 | $999K | 23K |
| 2026-02-20 | Dugas Eric J. | EVP CHIEF FINANCIAL OFFICER | Sell | 3K | $281.31 | $784K | 16K |
| 2026-02-19 | Welch John R. | Director | Sell | 750 | $273.07 | $205K | 10K |
| 2026-02-19 | MCKIM ALAN S | EXEC CHAIR, CTO. | Gift | 10K | $0.00 | $0 | 2.3M |
| 2026-02-19 | MCKIM ALAN S | EXEC CHAIR, CTO. | Sell | 100K | $281.14 | $28.1M | 2.3M |
| 2026-02-02 | Geer Charles H. II | EVP, Industrial Services | Tax withholding | 197 | $259.91 | $51K | 9K |
| 2026-02-02 | Diderich Jeroen | EVP&President of Sales&Service | Tax withholding | 105 | $259.91 | $27K | 14K |
| 2026-02-02 | Underwood Rebecca | PRESIDENT & EVP FACILITIES | Tax withholding | 425 | $259.91 | $110K | 17K |
| 2026-02-02 | Harrison Robert W. | EVP, EHS | Tax withholding | 184 | $259.91 | $48K | 6K |
| 2026-02-02 | Gabriel Sharon M. | EVP/CIO (CHESI) | Tax withholding | 508 | $259.91 | $132K | 27K |
| 2026-02-02 | Dugas Eric J. | EVP CHIEF FINANCIAL OFFICER | Tax withholding | 567 | $259.91 | $147K | 19K |
| 2026-02-02 | Weber Brian P | EVP (CHESI) | Tax withholding | 1K | $259.91 | $362K | 52K |
| 2026-02-02 | CURTIS GEORGE L | EXEC. VICE PRESIDENT (CHESI) | Tax withholding | 249 | $259.91 | $65K | 47K |
| 2026-02-02 | GERSTENBERG ERIC W | CO-CEO | Tax withholding | 5K | $259.91 | $1.3M | 46K |
| 2026-02-02 | Battles Michael Louis | CO-CEO | Tax withholding | 5K | $259.91 | $1.4M | 78K |
| 2026-02-01 | Geer Charles H. II | EVP, Industrial Services | Grant | 503 | $0.00 | $0 | 11K |
| 2026-02-01 | Geer Charles H. II | EVP, Industrial Services | Grant | 2K | $0.00 | $0 | 10K |
| 2026-02-01 | Diderich Jeroen | EVP&President of Sales&Service | Grant | 1K | $0.00 | $0 | 18K |
| 2026-02-01 | Diderich Jeroen | EVP&President of Sales&Service | Grant | 3K | $0.00 | $0 | 17K |
| 2026-02-01 | Underwood Rebecca | PRESIDENT & EVP FACILITIES | Grant | 838 | $0.00 | $0 | 20K |
| 2026-02-01 | Underwood Rebecca | PRESIDENT & EVP FACILITIES | Grant | 3K | $0.00 | $0 | 19K |
| 2026-02-01 | Harrison Robert W. | EVP, EHS | Grant | 430 | $0.00 | $0 | 7K |
| 2026-02-01 | Harrison Robert W. | EVP, EHS | Grant | 1K | $0.00 | $0 | 7K |
| 2026-02-01 | Gabriel Sharon M. | EVP/CIO (CHESI) | Grant | 566 | $0.00 | $0 | 29K |
| 2026-02-01 | Gabriel Sharon M. | EVP/CIO (CHESI) | Grant | 2K | $0.00 | $0 | 29K |
| 2026-02-01 | Dugas Eric J. | EVP CHIEF FINANCIAL OFFICER | Grant | 1K | $0.00 | $0 | 23K |
| 2026-02-01 | Dugas Eric J. | EVP CHIEF FINANCIAL OFFICER | Grant | 3K | $0.00 | $0 | 22K |
| 2026-02-01 | Weber Brian P | EVP (CHESI) | Grant | 1K | $0.00 | $0 | 56K |
| 2026-02-01 | Weber Brian P | EVP (CHESI) | Grant | 3K | $0.00 | $0 | 55K |
| 2026-02-01 | GERSTENBERG ERIC W | CO-CEO | Grant | 11K | $0.00 | $0 | 67K |
| 2026-02-01 | GERSTENBERG ERIC W | CO-CEO | Grant | 10K | $0.00 | $0 | 56K |
| 2026-02-01 | Battles Michael Louis | CO-CEO | Grant | 11K | $0.00 | $0 | 99K |
| 2026-02-01 | Battles Michael Louis | CO-CEO | Grant | 10K | $0.00 | $0 | 88K |
| 2026-01-02 | Gabriel Sharon M. | EVP/CIO (CHESI) | Tax withholding | 525 | $234.48 | $123K | 27K |
| 2025-12-17 | Welch John R. | Director | Gift | 415 | $0.00 | $0 | 11K |
| 2025-12-16 | GERSTENBERG ERIC W | CO-CEO | Sell | 601 | $240.90 | $145K | 50K |
| 2025-12-15 | Geer Charles H. II | EVP, Industrial Services | Tax withholding | 28 | $240.71 | $7K | 9K |
| 2025-12-15 | Underwood Rebecca | PRESIDENT & EVP FACILITIES | Tax withholding | 51 | $240.71 | $12K | 17K |
| 2025-12-15 | Harrison Robert W. | EVP, EHS | Tax withholding | 16 | $240.71 | $4K | 6K |
| 2025-12-09 | CURTIS GEORGE L | EXEC. VICE PRESIDENT (CHESI) | Gift | 1K | $0.00 | $0 | 48K |
| 2025-12-01 | Harrison Robert W. | EVP, EHS | Tax withholding | 122 | $228.54 | $28K | 6K |
| 2025-11-13 | States Lauren | Director | Gift | 245 | $0.00 | $0 | 11K |
| 2025-11-01 | Geer Charles H. II | EVP, Industrial Services | Tax withholding | 294 | $210.51 | $62K | 9K |
| 2025-09-16 | MCKIM ALAN S | EXEC CHAIR, CTO. | Gift | 4K | $0.00 | $0 | 2.3M |
| 2025-09-16 | MCKIM ALAN S | EXEC CHAIR, CTO. | Gift | 9K | $0.00 | $0 | 2.3M |
| 2025-08-05 | Robertson Andrea | Director | Gift | 430 | $0.00 | $0 | 9K |
| 2025-08-01 | Battles Michael Louis | CO-CEO | Buy | 2K | $233.50 | $467K | 83K |
| 2025-07-31 | Robertson Andrea | Director | Sell | 836 | $233.64 | $195K | 10K |
| 2025-07-01 | Underwood Rebecca | PRESIDENT & EVP FACILITIES | Tax withholding | 1K | $229.55 | $241K | 17K |
| 2025-07-01 | GERSTENBERG ERIC W | CO-CEO | Tax withholding | 564 | $229.55 | $129K | 51K |
Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are rarer.
Planned sales (Form 144)
Newest first. JSON11 Form 144 notices on file for CLH worth $6.0M at the prices reported; 2 in the last 90 days worth $1.1M. Latest: GERSTENBERG ERIC W filed on 2026-08-14 to sell 2,500 shares ($805K) from 2026-08-14.
| Filed | Seller | Shares | Market value | Of outstanding | Sale from | Broker |
|---|---|---|---|---|---|---|
| 2026-08-14 | GERSTENBERG ERIC WOfficer | 3K | $805K | 0.005% | 2026-08-14 | Raymond James & Associates, Inc. |
| 2026-08-03 | ANDREA ROBERTSONDirector | 789 | $248K | 0.001% | 2026-08-03 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-05-26 | LAUREN STATESDirector | 789 | $226K | 0.001% | 2026-05-26 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-03-18 | GERSTENBERG ERIC WOfficer | 1K | $290K | 0.002% | 2026-03-18 | Raymond James & Associates |
| 2026-03-18 | MARCY REEDDirector | 836 | $241K | 0.002% | 2026-03-18 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-03-17 | BRIAN WEBEROfficer | 5K | $1.4M | 0.009% | 2026-03-17 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-02-23 | GERSTENBERG ERIC WOfficer | 3K | $712K | 0.005% | 2026-02-23 | Raymond James & Associates |
| 2026-02-20 | SHARON M GABRIELOfficer | 4K | $999K | 0.007% | 2026-02-20 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-02-20 | ERIC DUGASOfficer | 3K | $784K | 0.005% | 2026-02-20 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-02-19 | JOHN WELCHDirector | 750 | $205K | 0.001% | 2026-02-19 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-12-16 | GERSTENBERG ERIC WOfficer | 601 | $145K | 0.001% | 2025-12-15 | Raymond James & Associates |
Large holders (13D and 13G)
One row per reporting person with its latest filing, newest first. JSON6 holders report 5% or more of CLH in their latest filing, all on Schedule 13G (passive). The largest reported stake is Wellington Management Group LLP at 6.8% of the class (3,576,062 shares), filed 2026-05-15 for an event on 2026-03-31.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 2026-08-06 | 13G | FMR LLCparent holding company | 3.0M | 5.7% | 2026-06-30 |
| 2026-08-06 | 13G | Abigail P. Johnsonindividual | 3.0M | 5.7% | 2026-06-30 |
| 2026-05-15 | 13G/Ano. 1 | D1 Capital Partners L.P.investment adviser, partnership | 1.3M | 2.5% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 1 | Daniel Sundheimparent holding company, individual | 1.3M | 2.5% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 16 | Wellington Management Group LLPparent holding company | 3.6M | 6.8% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 16 | Wellington Investment Advisors Holdings LLPparent holding company | 3.6M | 6.8% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 16 | Wellington Group Holdings LLPparent holding company | 3.6M | 6.8% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 16 | Wellington Management Company LLPinvestment adviser | 3.6M | 5.5% | 2026-03-31 |
| 2026-03-26 | 13G/Ano. 12 | The Vanguard Groupinvestment adviser | 0 | 0.0% | 2026-03-13 |
13F holders
Tracked managers holding CLH at their latest 13F. JSON6 of the 30 tracked managers held CLH at their latest 13F, $424.1M in total at quarter-end prices. AQR Capital Management is the largest at $142.8M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 4 added shares and 2 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| AQR Capital Management | 2026-06-30 | 478K | $142.8M | 0.05% | +297K |
| Two Sigma Investments | 2026-06-30 | 423K | $126.4M | 0.09% | -301K |
| Citadel Advisors | 2026-06-30 | 314K | $93.9M | 0.01% | +280K |
| Point72 Asset Management | 2026-06-30 | 105K | $31.4M | 0.03% | +49K |
| Renaissance Technologies | 2026-06-30 | 82K | $24.6M | 0.03% | new |
| D. E. Shaw & Co. | 2026-06-30 | 17K | $5.0M | 0.00% | -20K |
Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.
Financials
SEC XBRL, as filed. JSONIn Q1 FY 2026 (quarter ended 2026-03-31) Clean Harbors reported revenue of $1.46B, up 1.9% from the same quarter a year earlier, and net income of $63.2M (1.19 diluted EPS). In FY 2025 it generated $866.7M of operating cash flow and spent $250.0M on buybacks.
- Debt
- $2.76B
- Equity
- $2.78B
- Total assets
- $7.55B
- Shares outstanding
- 52,846,032
Quarterly, last 8 quarters
| Quarter | Period end | Revenue | Net income | Margin | Diluted EPS |
|---|---|---|---|---|---|
| Q1 FY 2026 | 2026-03-31 | $1.46B | $63.2M | 4.3% | 1.19 |
| Q4 FY 2025derived | 2025-12-31 | $1.50B | $86.6M | 5.8% | n/a |
| Q3 FY 2025 | 2025-09-30 | $1.55B | $118.8M | 7.7% | 2.21 |
| Q2 FY 2025 | 2025-06-30 | $1.55B | $126.9M | 8.2% | 2.36 |
| Q1 FY 2025 | 2025-03-31 | $1.43B | $58.7M | 4.1% | 1.09 |
| Q4 FY 2024derived | 2024-12-31 | $1.43B | $84.0M | 5.9% | n/a |
| Q3 FY 2024 | 2024-09-30 | $1.53B | $115.2M | 7.5% | 2.12 |
| Q2 FY 2024 | 2024-06-30 | $1.55B | $133.3M | 8.6% | 2.46 |
Fiscal years, with buybacks and dividends
| Fiscal year | Ends | Revenue | Net income | Operating cash flow | Capex | Buybacks | Dividends |
|---|---|---|---|---|---|---|---|
| FY 2025 | 2025-12-31 | $6.03B | $391.0M | $866.7M | $424.9M | $250.0M | n/a |
| FY 2024 | 2024-12-31 | $5.89B | $402.3M | $777.8M | $432.2M | $55.2M | n/a |
| FY 2023 | 2023-12-31 | $5.41B | $377.9M | $734.6M | $422.3M | $51.2M | n/a |
| FY 2022 | 2022-12-31 | $5.17B | $411.7M | $626.2M | $345.1M | $50.2M | n/a |
| FY 2021 | 2021-12-31 | $3.81B | $203.2M | $546.0M | $241.9M | $54.4M | n/a |
Quarters are the three-month figures the company reports; a fourth quarter marked derived is the fiscal year less the three reported quarters, since companies report it only inside the 10-K. Fiscal years are the annual figures. Buybacks are the cash the company paid to repurchase its common stock in the year, not the amount authorized. Balance sheet lines are as of 2026-03-31; shares outstanding as of 2026-05-01 from the cover page.
What this page is
Clean Harbors in the regulatory record
Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page puts those series for one ticker on one URL, with planned sales, large holders, 13F holders and financials beside them, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.
Each section has its own history table, a one-line summary of the latest figures and its own JSON and CSV links, and says when its source last updated.
This page follows Clean Harbors (CLH), SEC CIK 822818, listed on NYSE, classified by the SEC as hazardous waste management. The cross-market tables live on the short interest and insider transactions hubs.
Source and updates
- Short interest
- FINRA consolidated short interestSource: FINRA.Twice a month, about eight business days after settlement. Latest 2026-09-30.JSON and CSV
- Daily short volume
- FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-10-23.JSON and CSV
- Fails to deliver
- SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-09-21.JSON and CSV
- Planned sales
- SEC EDGAR Form 144Source: SEC.New notices appear shortly after the SEC posts them; a notice is filed on or before the sale. Latest 2026-08-14.JSON and CSV
- Large holders
- SEC EDGAR Schedule 13D and 13GSource: SEC.New filings appear shortly after the SEC posts them. A 13D is due within five business days of crossing 5%; a 13G follows the passive schedule. Latest 2026-08-06.JSON and CSV
- 13F holders
- SEC EDGAR Form 13F-HRSource: SEC.Quarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
- Financials
- SEC EDGAR 10-K and 10-Q filingsSource: SEC.Weekly; values are as filed in the 10-Q and 10-K. Latest 2026-03-31.JSON and CSV
- Earnings dates
- SEC EDGAR 8-K filings (Item 2.02)Source: SEC.Twice a day. Reported dates come from the company's 8-K filings; the next date is marked as an estimate until the 8-K arrives. Latest 2026-07-29.JSON and CSV
- Insider trades
- SEC EDGAR Form 4Source: SEC.New filings appear shortly after the SEC posts them; they're due two business days after the trade. Latest 2026-08-14.JSON and CSV
- Company record
- EDGAR filing index for CIK 822818Ticker, name and exchange from the SEC's company list, refreshed weekly.
- Rate limits
- 10 requests a minute without a key, 30 with a free key from a free account.
How to read it
- Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
- Insider buys next to a large short position are rare and stand out; insider sells next to one are common and mean little.
- Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.
Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.
Other companies the SEC classifies as hazardous waste management
Other company pages
- MLMMartin Marietta Materials
- MMM3M
- MNSTMonster Beverage
- MOAltria Group
- MODModine Manufacturing
- MOSMosaic
- MPMP Materials
- MPCMarathon Petroleum
- MPWRMonolithic Power Systems
- MRKMerck
- MRNAModerna
- MRSHMarsh & McLennan Companies
- MRVLMarvell Technology
- MSMorgan Stanley
- MSCIMSCI
- MSFTMicrosoft
- MSIMotorola Solutions
- MSTRStrategy
- MTBM&T Bank
- MTCHMatch Group
- MTDMettler-Toledo International
- MTNVail Resorts
- MTSIMACOM Technology Solutions Holdings
Datasets
Frequently Asked Questions
How much of CLH is sold short?
1,078,261 shares were held short at the 2026-09-30 settlement, 2.6 days of average volume. FINRA publishes the next count about eight business days after the 15th and the last business day of the month.
What is CLH's daily short volume?
On 2026-10-23, 90,610 of the 163,608 CLH shares reported to FINRA were sold short, 55.4% of the day's reported volume. Short volume is a flow for one day, not a position.
Does CLH have fails to deliver?
The SEC's latest file shows 15,805 CLH shares failed to deliver at settlement 2026-09-21. Fails are reported per settlement date and published twice a month with a lag.
Are CLH insiders buying or selling?
Insiders at CLH reported 2 open-market sells worth $1.1M in the last 90 days and no open-market buys. Latest filing: GERSTENBERG ERIC W (CO-CEO) on 2026-08-14.
Have CLH insiders filed to sell?
11 Form 144 notices on file for CLH worth $6.0M at the prices reported; 2 in the last 90 days worth $1.1M. Latest: GERSTENBERG ERIC W filed on 2026-08-14 to sell 2,500 shares ($805K) from 2026-08-14.
Who owns 5% or more of CLH?
6 holders report 5% or more of CLH in their latest filing, all on Schedule 13G (passive). The largest reported stake is Wellington Management Group LLP at 6.8% of the class (3,576,062 shares), filed 2026-05-15 for an event on 2026-03-31.
What did CLH report last quarter?
In Q1 FY 2026 (quarter ended 2026-03-31) Clean Harbors reported revenue of $1.46B, up 1.9% from the same quarter a year earlier, and net income of $63.2M (1.19 diluted EPS). In FY 2025 it generated $866.7M of operating cash flow and spent $250.0M on buybacks.
Which tracked 13F managers own CLH?
6 of the 30 tracked 13F managers held CLH shares at their latest filing, $424.1M in all. The largest: Cliff Asness's AQR Capital Management (478K shares, $142.8M), Two Sigma Investments (423K shares, $126.4M), Ken Griffin's Citadel Advisors (314K shares, $93.9M), Steve Cohen's Point72 Asset Management (105K shares, $31.4M), Renaissance Technologies (82K shares, $24.6M), D. E. Shaw & Co. (17K shares, $5.0M).
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.