Transactions
3
Insider / CLEAN HARBORS INC
Welch John R.
Director at CLEAN HARBORS INC
- Company
- CLEAN HARBORS INC
- Ticker
- CLH
- First filing on record
- December 29, 2025
- Latest trade on record
- May 20, 2026
- SEC filings
- EDGAR ↗
Welch John R., Director at CLEAN HARBORS INC, has disclosed 3 transactions in CLH since December 29, 2025: 0 purchases (0 open-market buys) and 1 sale, worth about $205K at the reported prices. The latest was filed May 22, 2026, 2 days after the trade; 1 filing was late against the 2-business-day Form 4 deadline.
Open-market buys
0
Sales
1
Avg. disclosure lag
5.0d
Trading in charts
Trade timeline
When does this person trade, how big, and in which direction? Every trade in the last 12 months.
Bought (above the line)Sold (below the line)Other transaction
In the last 12 months Welch John R. made no purchases and 1 sale worth $205K, plus 2 other transactions. Dot size is the dollar amount.
Portfolio mix
Which stocks does this person trade most? Tile size is dollars traded, all time on record.
Welch John R. has traded 1 stock on record; the largest by dollars is CLH.
Reporting lag
Does this person report on time? One bar per filing against the Form 4 deadline.
On timeLate
1 of 3 filings on record were reported after the Form 4 deadline (two business days, counted here as 4 calendar days).
What kind of transactions
Most Form 4 rows are pay arriving or tax being withheld, not a decision to buy or sell. Only code P is an open-market purchase and code S an open-market sale. What each code means: Form 4 transaction codes.
| Code | Meaning | Rows | Shares | Value |
|---|---|---|---|---|
| A | Grant or award | 1 | 652 | — |
| G | Gift | 1 | 415 | — |
| S | Open-market sale | 1 | 750 | $205K |
| Year | Rows | Bought | Sold |
|---|---|---|---|
| 2026 | 2 | 0 | 1 · $205K |
| 2025 | 1 | 0 | 0 |
Transactions
| Security | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|
| CLH | Other A | May 20, 2026 | May 22, 2026 | 2d | 652 | — | — | Form 4 ↗ | ||
| CLH | Sell S | February 19, 2026 | February 20, 2026 | 1d | 750 | $273 | $205K | Form 4 ↗ | ||
| CLH | Other G | December 17, 2025 | December 29, 2025 | 12d | 415 | — | — | late | Form 4 ↗ |
Filings
| Filed | Form | Accession | Rows | Status | Source |
|---|---|---|---|---|---|
| May 22, 2026 | Form 4 | 0001611303-26-000003 | 1 | published | EDGAR ↗ |
| February 20, 2026 | Form 4 | 0001611303-26-000002 | 1 | published | EDGAR ↗ |
| December 29, 2025 | Form 4 | 0001611303-25-000004 | 1 | published | EDGAR ↗ |
Other insiders at CLEAN HARBORS INC
- GERSTENBERG ERIC W CO-CEO 10 rows
- Gabriel Sharon M. EVP/CIO (CHESI) 8 rows
- Dugas Eric J. EVP CHIEF FINANCIAL OFFICER 7 rows
- Geer Charles H. II EVP, Industrial Services 7 rows
- Harrison Robert W. EVP, EHS 7 rows
- Underwood Rebecca PRESIDENT & EVP FACILITIES 7 rows
- Weber Brian P EVP (CHESI) 7 rows
- Battles Michael Louis CO-CEO 6 rows
- MCKIM ALAN S EXEC CHAIR, CTO. 6 rows
- CURTIS GEORGE L EXEC. VICE PRESIDENT (CHESI) 5 rows
Everyone on file, with contracts and lobbying under the company's name: CLEAN HARBORS INC.
Guides for this page
- What is SEC Form 4? Who files: officers, directors and owners of more than 10% of a class of the company's shares.
- Form 4 transaction codes P = purchase. S = sale. These are the two market trades.
- Insider buying vs insider selling Selling outweighs buying by a wide margin in normal times.
- What disclosure data cannot tell you Filings are late by design: up to 45 days for Congress, two business days for insiders.
Sources and method
| Source | Filings | Rows | First filed | Newest filed | Read the originals |
|---|---|---|---|---|---|
| SEC EDGAR, Form 4 | 3 | 3 | December 29, 2025 | May 22, 2026 | Form 4 list on EDGAR |
Site built October 22, 2026. Every row in the tables above links to its own filing. To quote a figure, use the Cite button at the top of the page; see how to cite and reuse.
Every row comes from the reporting owner's Form 4 as filed with the SEC (EDGAR ownership XML), read daily. "Value" is shares × the reported price; code P is an open-market purchase, S a sale, M an option exercise, A a grant. The lag is the filing date minus the trade date; Form 4 is due within two business days. Amendments (4/A) are not merged. Details on the methodology page; report an error on corrections.
Not investment advice. Figures are public disclosures shown as filed; they may lag the trade and may be amended later. No recommendation is made or implied.