Alan S. McKim, executive chair and CTO of Clean Harbors Inc. ($CLH), sold $79.8 million in company shares across four open market transactions in the last year. His most recent sale occurred on March 4, 2026. These sales rank him 198th out of 11,678 insiders by total value, surpassing the average of $8.6 million and 6.4 transactions per seller. He made no open market purchases.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| March 13, 2026 | CLEAN HARBORS INC | $CLH | MCKIM ALAN S | EXEC CHAIR, CTO. | F | Common Stock | 1265 | $288.93 | 2,265,223.0000 | 53,716,000 | 0.06% | 0.00% |
| March 4, 2026 | CLEAN HARBORS INC | $CLH | MCKIM ALAN S | EXEC CHAIR, CTO. | S | Common Stock | 100000 | $292.65 | 2,266,488.0000 | 53,716,000 | 4.23% | 0.19% |
| Feb. 19, 2026 | CLEAN HARBORS INC | $CLH | MCKIM ALAN S | EXEC CHAIR, CTO. | G | Common Stock | 10000 | $0.00 | 2,366,488.0000 | 53,716,000 | 0.42% | 0.02% |
| Feb. 19, 2026 | CLEAN HARBORS INC | $CLH | MCKIM ALAN S | EXEC CHAIR, CTO. | S | Common Stock | 100000 | $281.14 | 2,376,488.0000 | 53,716,000 | 4.04% | 0.19% |
| Sept. 16, 2025 | CLEAN HARBORS INC | $CLH | MCKIM ALAN S | EXEC CHAIR, CTO. | G | Common Stock | 4283 | $0.00 | 2,476,488.0000 | 54,199,000 | 0.17% | 0.01% |
| Sept. 16, 2025 | CLEAN HARBORS INC | $CLH | MCKIM ALAN S | EXEC CHAIR, CTO. | G | Common Stock | 8567 | $0.00 | 2,480,771.0000 | 54,199,000 | 0.34% | 0.02% |
| July 1, 2025 | CLEAN HARBORS INC | $CLH | MCKIM ALAN S | EXEC CHAIR, CTO. | F | Common Stock | 1342 | $229.55 | 2,489,338.0000 | 54,199,000 | 0.05% | 0.00% |
| June 4, 2025 | CLEAN HARBORS INC | $CLH | MCKIM ALAN S | EXEC CHAIR, CTO. | S | Common Stock | 41844 | $225.40 | 2,548,836.0000 | 54,199,000 | 1.62% | 0.08% |
| June 5, 2025 | CLEAN HARBORS INC | $CLH | MCKIM ALAN S | EXEC CHAIR, CTO. | S | Common Stock | 58156 | $223.80 | 2,490,680.0000 | 54,199,000 | 2.28% | 0.11% |
| March 17, 2025 | CLEAN HARBORS INC | $CLH | MCKIM ALAN S | EXEC CHAIR, CTO. | F | Common Stock | 1265 | $192.90 | 2,590,680.0000 | 54,199,000 | 0.05% | 0.00% |
| March 3, 2025 | CLEAN HARBORS INC | $CLH | MCKIM ALAN S | EXEC CHAIR, CTO. | S | Common Stock | 2999 | $212.02 | 2,591,945.0000 | 54,199,000 | 0.12% | 0.01% |
| March 3, 2025 | CLEAN HARBORS INC | $CLH | MCKIM ALAN S | EXEC CHAIR, CTO. | G | Common Stock | 28073 | $0.00 | 2,591,945.0000 | 54,199,000 | 1.07% | 0.05% |
| March 3, 2025 | CLEAN HARBORS INC | $CLH | MCKIM ALAN S | EXEC CHAIR, CTO. | S | Common Stock | 50000 | $210.18 | 2,616,060.0000 | 54,199,000 | 1.88% | 0.09% |
| Nov. 15, 2024 | CLEAN HARBORS INC | $CLH | MCKIM ALAN S | EXEC CHAIR, CTO. | G | Common Stock | 7200 | $0.00 | 2,688,017.0000 | 54,229,000 | 0.27% | 0.01% |
| Nov. 18, 2024 | CLEAN HARBORS INC | $CLH | MCKIM ALAN S | EXEC CHAIR, CTO. | G | Common Stock | 15000 | $0.00 | 2,673,017.0000 | 54,229,000 | 0.56% | 0.03% |
| July 1, 2024 | CLEAN HARBORS INC | $CLH | MCKIM ALAN S | EXEC CHAIR, CTO. | F | Common Stock | 1343 | $220.63 | 2,695,217.0000 | 54,382,000 | 0.05% | 0.00% |
| June 11, 2024 | CLEAN HARBORS INC | $CLH | MCKIM ALAN S | EXEC CHAIR, CTO. | S | Common Stock | 50000 | $215.51 | 2,696,560.0000 | 54,382,000 | 1.82% | 0.09% |
| March 18, 2024 | CLEAN HARBORS INC | $CLH | MCKIM ALAN S | EXEC CHAIR, CTO. | G | Common Stock | 28000 | $0.00 | 2,746,560.0000 | 54,382,000 | 1.01% | 0.05% |
| March 15, 2024 | CLEAN HARBORS INC | $CLH | MCKIM ALAN S | EXEC CHAIR, CTO. | F | Common Stock | 1265 | $187.84 | 2,746,560.0000 | 54,382,000 | 0.05% | 0.00% |
| Feb. 26, 2024 | CLEAN HARBORS INC | $CLH | MCKIM ALAN S | EXEC CHAIR, CTO. | G | Common Stock | 55525 | $0.00 | 2,775,825.0000 | 54,382,000 | 1.96% | 0.10% |
| Feb. 27, 2024 | CLEAN HARBORS INC | $CLH | MCKIM ALAN S | EXEC CHAIR, CTO. | S | Common Stock | 35000 | $182.22 | 2,805,825.0000 | 54,382,000 | 1.23% | 0.06% |
| Feb. 26, 2024 | CLEAN HARBORS INC | $CLH | MCKIM ALAN S | EXEC CHAIR, CTO. | G | Common Stock | 20000 | $0.00 | 2,785,825.0000 | 54,382,000 | 0.71% | 0.04% |
| Feb. 26, 2024 | CLEAN HARBORS INC | $CLH | MCKIM ALAN S | EXEC CHAIR, CTO. | G | Common Stock | 10000 | $0.00 | 2,775,825.0000 | 54,382,000 | 0.36% | 0.02% |
| Feb. 26, 2024 | CLEAN HARBORS INC | $CLH | MCKIM ALAN S | EXEC CHAIR, CTO. | S | Common Stock | 35000 | $184.06 | 2,840,825.0000 | 54,382,000 | 1.22% | 0.06% |
| Dec. 20, 2023 | CLEAN HARBORS INC | $CLH | MCKIM ALAN S | EXEC CHAIR, CTO. | S | Common Stock | 17453 | $178.37 | 2,931,350.0000 | 54,487,000 | 0.59% | 0.03% |
| Nov. 17, 2023 | CLEAN HARBORS INC | $CLH | MCKIM ALAN S | EXEC CHAIR, CTO. | S | Common Stock | 46611 | $164.60 | 2,948,803.0000 | 54,487,000 | 1.56% | 0.09% |
| Nov. 16, 2023 | CLEAN HARBORS INC | $CLH | MCKIM ALAN S | EXEC CHAIR, CTO. | S | Common Stock | 28389 | $164.50 | 2,995,414.0000 | 54,487,000 | 0.94% | 0.05% |
| July 3, 2023 | CLEAN HARBORS INC | $CLH | MCKIM ALAN S | EXEC CHAIR, CTO. | S | Common Stock | 1231 | $164.43 | 3,023,803.0000 | 54,487,000 | 0.04% | 0.00% |
| June 8, 2023 | CLEAN HARBORS INC | $CLH | MCKIM ALAN S | EXEC CHAIR, CTO. | G | Common Stock | 10000 | $0.00 | 3,025,034.0000 | 54,487,000 | 0.33% | 0.02% |
| May 16, 2023 | CLEAN HARBORS INC | $CLH | MCKIM ALAN S | EXEC CHAIR, CTO. | S | Common Stock | 53800 | $139.02 | 3,035,034.0000 | 54,487,000 | 1.74% | 0.10% |
| May 15, 2023 | CLEAN HARBORS INC | $CLH | MCKIM ALAN S | EXEC CHAIR, CTO. | S | Common Stock | 16200 | $139.60 | 3,088,834.0000 | 54,487,000 | 0.52% | 0.03% |
| May 11, 2023 | CLEAN HARBORS INC | $CLH | MCKIM ALAN S | EXEC CHAIR, CTO. | G | Common Stock | 10000 | $0.00 | 3,105,034.0000 | 54,487,000 | 0.32% | 0.02% |
| March 22, 2023 | CLEAN HARBORS INC | $CLH | MCKIM ALAN S | CHRMN.OF BD, PRES. & CEO | G | Common Stock | 90000 | $0.00 | 3,115,034.0000 | 54,487,000 | 2.81% | 0.17% |
| March 15, 2023 | CLEAN HARBORS INC | $CLH | MCKIM ALAN S | CHRMN.OF BD, PRES. & CEO | S | Common Stock | 1161 | $133.07 | 3,205,034.0000 | 54,487,000 | 0.04% | 0.00% |
| March 3, 2023 | CLEAN HARBORS INC | $CLH | MCKIM ALAN S | CHRMN.OF BD, PRES. & CEO | G | Common Stock | 49156 | $0.00 | 3,206,195.0000 | 54,487,000 | 1.51% | 0.09% |