Insider · CIK 0001611303
John R. Welch
director
Files at CLH (CLEAN HARBORS INC). First filing May 29, 2025, latest Feb 20, 2026.
Track record
Not enough history
Fewer than three past buys with six months of prices.
Median 6-month excess
-
after past buys, n = 0
Hit rate
-
past buys that beat the index over 6 months
Open-market trades
0 / 2
$0 bought, $490k sold
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
CLH: CLEAN HARBORS INC
CLHOct 9, 2026 · close 316.93
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 42Moderate | CLEAN HARBORS INC | $205k 750 shares | -7% | +55% from low0% from high | |
| 44Moderate | CLEAN HARBORS INC | $286k 1,250 shares | -10% | +25% from low-14% from high |
Transactions
Every row this insider has filed, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Feb 19, 2026 | CLH CLEAN HARBORS INC | SOpen-market sale Common Stock | -750 | $273.07 | $205k | 10,237 | Feb 20, 2026 |
| Dec 17, 2025 | CLH CLEAN HARBORS INC | GGift Common Stock | -415 | $0.00 | $0 | 10,987 | Dec 29, 2025 |
| May 28, 2025 | CLH CLEAN HARBORS INC | SOpen-market sale Common Stock | -1,250 | $228.51 | $286k | 11,402 | May 29, 2025 |
| May 21, 2025 | CLH CLEAN HARBORS INC | AGrant or award Common Stock | +789 | $0.00 | $0 | 12,652 | May 23, 2025 |
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.