Eric W. Gerstenberg is CEO at CLEAN HARBORS INC (CLH). They have made 31 open-market trades across 2 companies since 2006, most recently 2026-08-14.
CIK 0001211558
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
0 open-market purchases, against 31 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| CLH | 56,793 | $18.2M |
| CLHB | 5,949 | — |
| Total | $18.2M |
Shares reported on the most recent Form 4, priced at the 2026-08-18 close. 1 holding could not be priced and is excluded from the total.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| CLH | SELL | 2026-08-14 | 2026-08-18 | $321.34 | $803K | -2.9% | -1.2% | — |
| CLH | SELL | 2026-03-18 | 2026-03-19 | $293.00 | $293K | -0.9% | +5.0% | -0.7% |
| CLH | SELL | 2026-02-23 | 2026-08-14 | $279.86 | $700K | -2.2% | +0.8% | N/A |
| CLH | SELL | 2025-12-16 | 2025-12-17 | $240.90 | $290K | -0.6% | +10.4% | +21.5% |
| CLH | SELL | 2025-06-06 | 2025-06-09 | $225.23 | $3.6M | +0.3% | +2.3% | +5.7% |
| CLH | SELL | 2024-11-15 | 2024-11-18 | $250.42 | $3.0M | +8.1% | -2.3% | -5.7% |
| CLH | SELL | 2024-03-15 | 2024-03-18 | $187.71 | $5.7M | +5.2% | +0.2% | +18.2% |
| CLH | SELL | 2023-11-22 | 2023-11-27 | $164.82 | $1.3M | +5.0% | +10.1% | +13.9% |
| CLH | SELL | 2023-07-03 | 2023-07-06 | $164.43 | $3.2M | +1.3% | +3.3% | -0.5% |
| CLH | SELL | 2023-03-15 | 2023-03-17 | $133.07 | $130K | +0.3% | +6.4% | +15.8% |
| CLH | SELL | 2022-12-21 | 2022-12-22 | $116.02 | $3.8M | -2.3% | +12.9% | +17.7% |
| CLH | SELL | 2022-03-25 | 2022-03-28 | $106.62 | $1.5M | -0.2% | -4.1% | -20.4% |
| CLH | SELL | 2021-08-20 | 2021-08-23 | $100.28 | $3.6M | +3.5% | -0.1% | +7.6% |
| CLH | SELL | 2020-08-20 | 2020-08-21 | $61.72 | $2.5M | -0.6% | -12.0% | +17.4% |
| CLH | SELL | 2019-08-08 | 2019-08-12 | $78.52 | $1.6M | -0.5% | +0.6% | +9.8% |
| CLH | SELL | 2018-06-25 | 2018-06-25 | $55.19 | $442K | +2.9% | +1.8% | +27.2% |
| CLH | SELL | 2017-12-27 | 2017-12-28 | $52.77 | $755K | +1.3% | +4.6% | -10.3% |
| CLH | SELL | 2017-12-26 | 2017-12-27 | $53.04 | $546K | +2.3% | +6.1% | -9.0% |
| CLH | SELL | 2017-08-24 | 2017-08-25 | $50.42 | $471K | +4.1% | +6.6% | +1.7% |
| CLH | SELL | 2016-12-09 | 2016-12-12 | $55.42 | $416K | +0.9% | -2.9% | -0.5% |
| CLH | SELL | 2015-09-09 | 2015-09-11 | $49.19 | $811K | -4.3% | +2.5% | +2.5% |
| CLH | SELL | 2013-10-01 | 2013-10-02 | $58.92 | $59K | -4.3% | +2.5% | +2.5% |
| CLH | SELL | 2012-08-09 | 2012-08-10 | $55.00 | $220K | -4.3% | +2.5% | +2.5% |
| CLH | SELL | 2012-05-21 | 2012-05-29 | $61.29 | $184K | -4.3% | +2.5% | +2.5% |
| CLH | SELL | 2011-07-06 | 2011-07-07 | $107.06 | $128K | -4.3% | +2.5% | +2.5% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.