Ticker

CLH

Clean Harbors, Inc

Get an email when CLH is filed on. A free account follows up to three names.Create a free account →

CLH in the last 90 days

Clean Harbors, Inc (CLH) had 4 congress transactions by 1 member and no insider purchases in filings from the last 90 days.

FINRA’s latest report (settlement 15 SEPT 2026) shows 1,128,021 shares held short, 3.3 days to cover, up 7.3% from the report before.

  • Congress: 0 purchases and 4 sales reported, amounts in the bands the law requires.
  • Delay: each filing below shows how many days passed between the trade and its publication. None of this is real-time.

Latest filing on file: 09 SEPT 2026 · FINRA settlement 15 SEPT 2026 · public filings, reported as filed

What the price is doing

$313$300 → $313 · +4% over six months

CLH is up 4%. Short sellers still aren't backing off.

Bets against it — they pay off if the price falls — are up 46% over the same stretch.

$300 STARTAPRMAYJUNJULAUGSEPTOCT30 APR 2026 — Hon. April McClain Delaney — $1,001 – $15,000 · partial01 MAY 2026 — Hon. April McClain Delaney — $1,001 – $15,000 · partial24 JUL 2026 — Hon. April McClain Delaney — $1,001 – $15,000 · partial27 JUL 2026 — Hon. April McClain Delaney — $1,001 – $15,000 · partial28 JUL 2026 — Hon. April McClain Delaney — $1,001 – $15,000 · partial25 AUG 2026 — Hon. April McClain Delaney — $50,001 – $100,000NOW $313

Politician activityBoughtSold

Short sellers

11 reports · twice a month

APR 0%peak +70%15 SEPT +46%APRMAYJUNJULAUGSEPTOCT

Money betting CLH falls. Reported twice a month, and it shows up seven working days late.

Politicians

0 buys · 6 sales

Traded over six months

View activity →

Short sellers

Bets up 46%

Over six months · newest 15 SEPT 2026

See the numbers →

Insiders

Nothing reported

Traded over six months

Quiet Money

Our take on how well CLH holds up when sellers show up.

How it holds up · last 60 trading days

Through 21 SEPT 2026

Mixed

When CLH gets hit lately, it goes both ways.

Lately, CLH holds firm some days and gives way on others.

That's been true for the last 9 trading days.

The last 6 months

ResilientMixedVulnerable
MAYJUNJULAUGSEPT
31 MAR 2026Now · 21 SEPT 2026

What the filings show

What the filings show · last 90 days

2 of 4 sources

-30Tilted out

Leaning outBalancedLeaning in

The disclosed money is leaning away from this name, on what has actually been filed. This reads on two of the four sources we track.

Short interest
Short interest fell 2.2% — 1,153,385 to 1,128,021 shares between 15 JUL 2026 and 15 SEPT 2026. See the filings →
+5
Congress
1 member of Congress disclosed 0 purchases and 4 sales. See the filings →
-100

This summarises filings that have already been published — it is not a forecast, a rating of the company, or advice. Every figure above is listed in full further down this page, with the document it came from.

FINRA short interest

Settlement 15 SEPT 2026 · shares held short

1,128,021shares held short

Days to cover

3.26

Avg daily volume

346,102

Since last report

+7.34%

As of 15 September 2026, 1,128,021 Clean Harbors, Inc shares were held short — the total across every reporting firm, not one fund's position. That is 77,122 shares more than the previous report, a 7.34% increase. At the average daily volume of 346,102 shares, that position represents 3.26 days of trading — what the filing calls days to cover.

This is the most recent figure that exists, and it is 17 days old. FINRA collects short interest twice a month, on a settlement date, and publishes it about eight business days later. So nobody has a live short-interest number for CLH — not us, and not anyone quoting one. We print the settlement date on the figure so you always know which day you are looking at.

Across the 12 reports we hold, the position has risen from 817,603 shares on 31 March 2026 to 1,128,021 today, a change of 38.0%. The highest reading in that window was 1,311,094 shares on 31 July 2026.

SettlementShares shortDays to cover
15 SEPT 20261,128,0213.26
31 AUG 20261,050,8992.39
14 AUG 20261,113,3612.61
31 JUL 20261,311,0942.25
15 JUL 20261,153,3853.13
30 JUN 20261,197,1092.43
15 JUN 20261,160,6982.29
29 MAY 20261,087,8062.00
15 MAY 20261,036,3921.36
30 APR 2026815,8402.09
15 APR 2026771,7001.50
31 MAR 2026817,6031.56
What is CLH's short interest?
1,128,021 shares, as of the 15 September 2026 settlement date. That is the figure FINRA published, unadjusted.
What percentage of the float is short?
We do not publish that, because FINRA does not publish float. The regulator reports the number of shares held short; turning it into a percentage needs a share count from somewhere else, and different sources disagree about what counts as float. We would rather give you the number that was actually filed than a percentage built on an assumption.
How current is this?
It is 17 days old, and that is as fresh as short interest gets. FINRA measures it twice a month and publishes it seven business days after the settlement date. Any site showing you a "live" short interest figure is showing you something else.
What does days to cover mean?
It is the short position divided by average daily trading volume — here, 3.26. It describes how many days of ordinary trading the position is equivalent to. It is arithmetic from the filing, not a prediction about what will happen.
Where does this come from?
FINRA's consolidated short interest file, which is public. We read it directly and store it unchanged, except that we blank the days-to-cover placeholder FINRA writes when a stock has almost no volume.

Disclosed insider buying on file

—no purchase on file passed the price check

Open-market purchases only — the amount is a fact, not a verdict.

On file here

Short positions0

Insider purchases0

Congress transactions13

Latest change09 SEPT 2026

SHORT POSITIONS · 0INSIDER BUYS · 0CONGRESS · 13

Congress transactions on file

13 disclosed · newest first · every row links to its filing

WhoAmount as filedTradedFiledLag
Hon. April McClain DelaneySOLD$50,001 – $100,00025 AUG 202609 SEPT 202615 days
Hon. April McClain DelaneySOLD$1,001 – $15,000 · partial27 JUL 202603 AUG 20267 days
Hon. April McClain DelaneySOLD$1,001 – $15,000 · partial28 JUL 202603 AUG 20266 days
Hon. April McClain DelaneySOLD$1,001 – $15,000 · partial24 JUL 202603 AUG 202610 days
Hon. April McClain DelaneySOLD$1,001 – $15,000 · partial01 MAY 202605 JUN 202635 days
Hon. April McClain DelaneySOLD$1,001 – $15,000 · partial30 APR 202606 MAY 20266 days
Hon. April McClain DelaneyBOUGHT$15,001 – $50,00023 FEB 202610 MAR 202615 days
Hon. April McClain DelaneyBOUGHT$1,001 – $15,00003 DEC 202505 JAN 202633 days
Hon. April McClain DelaneySOLD$1,001 – $15,000 · partial07 AUG 202502 SEPT 202526 days
Hon. April McClain DelaneySOLD$1,001 – $15,000 · partial20 JUN 202502 JUL 202512 days
Hon. April McClain DelaneySOLD$1,001 – $15,000 · partial10 FEB 202520 MAR 202538 days
Hon. April McClain DelaneySOLD$1,001 – $15,000 · partial07 FEB 202520 MAR 202541 days
Hon. Rob BresnahanSOLD$1,001 – $15,00013 JAN 202513 FEB 202531 days
What this page will never showNo price targetsNo score out of 100No buy or sell callsNo predictionsDocuments, dates, and how late they were.