Skip to main content
CWST logo

CWST · Casella Waste Systems Inc

Track CWST — free
Market Cap
$5.94B
Shares
63.64M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 418
Total Value: $7,497,203,817
Total Shares: 77,314,676
Showing 1–100 of 422 holdings by value · page 1 of 5

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 418 13F filers · Δ vs Mar 31, 2026
Top Holder
12.1%
Sep 2023 → Jun 2026 · range 9.0% – 12.1%
+0.0 pts
Top 5
28.1%
Sep 2023 → Jun 2026 · range 27.6% – 32.7%
+0.5 pts
Top 10
41.2%
Sep 2023 → Jun 2026 · range 41.0% – 47.0%
+0.2 pts
HHI
301
Sep 2023 → Jun 2026 · range 284 – 351
Broadly held+3

Quarterly Activity

vs Mar 31, 2026
New
66
Increased
168
Decreased
128
Sold Out
56
Unchanged
56
Holder count: +10
Institutional value: +26.6%
Shares held: +3.5%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 422
Export CSV
Holder Value (USD) % of 13F Shares Open
Key facts CIK 911177 CUSIP 147448104 13F (30d) 280 filings 280 filers Visit website Investor relations