$CWST

$93.71 -$2.45 (2.55%) Close

$CWST Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 63.6M shares outstanding

Who owns CWST?

By type of holder

Institutions 100.0% Insiders 0.0% Everyone else 0.0%

Concentration Top 10 holders own 49.8%

BlackRock, Inc. 14.8% · Wasatch Advisors LP 5.6%

Institutional ownership

100.0%

0 pts vs last qtr

Institutional holders

416

+9 vs last qtr

Net shares bought

+2.7M

by institutions in Q2 2026

New / sold out

66 / 57

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Wasatch Advisors LP +949.4K
American Century Companies Inc +805.9K

Biggest sellers in Q2 2026

William Blair Investment Management, LLC −988.8K
Conestoga Capital Advisors, LLC −468.3K

Who is planning to sell?

Notices of proposed sale, last 12 months

$5.53M

25 notices from 12 people

Shares covered

60.3K

0.09% of the company

Arranged in advance

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

Douglas Casella Director $1.33M
Coletta Edmond Officer $1.17M

Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

Diluted share count, FY2016–FY2025

+54.2%

+4.93% a year

Each share's claim on the business

−35.1%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

— vs $88.9M

over 10 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years64% 3–5 years9% 1–3 years18% Under 1 year9%

Quarterly turnover

10.6%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting CWST on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
B BlackRock, Inc.	9.4M	14.76%	+342.8K (+3.8%)	≤2021	0.0%
Shares held by quarter Peak holding9.4M (Q2'26) Change over 8 quarters+4.8M Share of the company14.760% BlackRock, Inc.'s full portfolio →
WA Wasatch Advisors LP	3.5M	5.55%	+949.4K (+36.8%)	2024	2.2%
Shares held by quarter Peak holding3.8M (Q4'25) Change over 8 quarters+1.8M Share of the company5.550% Wasatch Advisors LP's full portfolio →

BlackRock, Inc.

9.4M

% of company

14.76%

Change vs last qtr

+342.8K (+3.8%)

Held since

≤2021

Wasatch Advisors LP

3.5M

% of company

5.55%

Change vs last qtr

+949.4K (+36.8%)

Held since

2024

28 more super investors behind a free account

See every manager holding Casella Waste Systems, Inc., how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting CWST on Form N-PORT; together they hold 61.1% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
IC iShares Core S&P Small-Cap ETF iShares Trust	$366M	3.8M	5.93%	0.33%	June 30, 2026
SW SMALLCAP World Fund Inc SMALLCAP World Fund Inc	$294M	3.0M	4.77%	0.31%	June 30, 2026

iShares Core S&P Small-Cap ETF

iShares Trust

Position value

$366M

% of company

5.93%

% of the fund

0.33%

As of

June 30, 2026

SMALLCAP World Fund Inc

Position value

$294M

% of company

4.77%

% of the fund

0.31%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Casella Waste Systems, Inc. and how much of the fund the position is.

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