CLH Insider Trading Activity

Transactions disclosed by company insiders to the SEC on Form 4, most recent first.

InsiderRoleDateSharesValue
GERSTENBERG ERIC W CO-CEO 2026-08-14 2,500 $803,350
Robertson Andrea Insider 2026-08-03 789 $247,754
CURTIS GEORGE L EXEC. VICE PRESIDENT (CHESI) 2026-07-01 1,757 $510,830
Battles Michael Louis CO-CEO 2026-07-01 1,032 $300,044

How Institutional Funds Moved on CLH

Position changes disclosed in SEC Form 13F filings. These report a quarterly snapshot, not exact trade dates.

FundChangeQuarter
NORGES BANK NORGES BANK opened a new position worth $188,838,680. 2026-06-30
STEADFAST CAPITAL MANAGEMENT LP STEADFAST CAPITAL MANAGEMENT LP opened a new position worth $90,249,686. 2026-06-30
Holocene Advisors, LP Holocene Advisors, LP opened a new position worth $63,101,079. 2026-06-30
Qube Research & Technologies Ltd Qube Research & Technologies Ltd opened a new position worth $73,814,553. 2026-06-30
RENAISSANCE TECHNOLOGIES LLC RENAISSANCE TECHNOLOGIES LLC opened a new position worth $24,557,848. 2026-06-30
DIMENSIONAL FUND ADVISORS LP DIMENSIONAL FUND ADVISORS LP increased this position by 24% ($131,505,763 -> $163,313,480). 2026-06-30
GEODE CAPITAL MANAGEMENT, LLC GEODE CAPITAL MANAGEMENT, LLC increased this position by 29% ($216,294,207 -> $278,898,177). 2026-06-30
FMR LLC FMR LLC increased this position by 48% ($471,462,397 -> $695,431,146). 2026-06-30

Which Funds Hold CLH

Largest reported positions as of 2026-06-30.

FundValueShares
FMR LLC $695,431,146 2,327,803
VANGUARD CAPITAL MANAGEMENT LLC $652,162,885 2,182,972
WELLINGTON MANAGEMENT GROUP LLP $619,208,968 2,072,666
VANGUARD PORTFOLIO MANAGEMENT LLC $592,521,630 1,983,336
D1 Capital Partners L.P. $393,005,924 1,315,501
Clearbridge Investments, LLC $336,614,659 1,126,744
GEODE CAPITAL MANAGEMENT, LLC $278,898,177 933,314
SNYDER CAPITAL MANAGEMENT L P $275,501,872 922,182
Durable Capital Partners LP $266,605,994 892,405
Select Equity Group, L.P. $217,601,732 728,374

Data compiled from public SEC filings. This is informational reporting, not investment advice.

April McClain Delaney’s Child Sells CLH Again as Insider Follows

Illustration of a stock disclosure document showing a Clean Harbors (CLH) sale linked to a member of Congress

Rep. April McClain Delaney has filed another Periodic Transaction Report disclosing a sale of Clean Harbors, Inc. (CLH) common stock, this time executed by one of her dependent children. The transaction, dated July 28, 2026, falls within the $1,001 to $15,000 disclosure range required under the STOCK Act. As with all such filings, the report … Read more

April McClain Delaney Reports New CLH Sale, Insider Follows

Stock ticker board showing CLH alongside a document icon representing a congressional disclosure filing

Rep. April McClain Delaney has filed another Periodic Transaction Report tied to shares of Clean Harbors, Inc. (CLH), disclosing that her dependent child sold the stock on July 27, 2026. The transaction falls in the standard congressional disclosure range of $1,001 to $15,000, the smallest bracket used on STOCK Act filings. This is not the … Read more

April McClain Delaney Discloses CLH Stock Sale via Child

Stock disclosure document showing a Clean Harbors (CLH) sale filed under the STOCK Act

A new Periodic Transaction Report filed with the U.S. House of Representatives shows Hon. April McClain Delaney reporting a sale of Clean Harbors, Inc. Common Stock (CLH), executed on behalf of her dependent child. The transaction, dated July 24, 2026, falls within the $1,001 to $15,000 disclosure range required under the STOCK Act. Under that … Read more

William Blair Investment Management, LLC: 13F Portfolio Moves Tracked

Summary of William Blair Investment Management LLC portfolio changes for the quarter ending 2026-03-31, including a new Birkenstock position and increased stakes in Gold Fields, Millicom, Sterling Infrastructure, and TotalEnergies.

Quarter Ending 2026-03-31 During the quarter ending 2026-03-31, William Blair Investment Management, LLC made notable adjustments across its equity portfolio, with a clear tilt toward adding to existing positions rather than establishing new ones. The most significant new commitment was a fresh stake in Birkenstock Holding PLC (BIRK), valued at $92,276,654. Several holdings saw dramatic … Read more