CWST US Equity

CASELLA WASTE SYSTEMS INC

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Industrials · Refuse Systems · CIK 911177 · FYE 1231

$91.10

+1.80 (+2.02%)

USD · as of 2026-07-28 · marketstack

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Institutional ownership· 13F filers holding CWST · 2026-Q1 methodology → sources →

401 holders

% of shares outstanding held

—

Shares held (13F)

74,587,800

Reporting holders

401

% of shares outstanding suppressed: the summed institutional 13F holdings (74,587,800) exceed the latest reported shares-outstanding count (63,565,000) by more than securities-lending double counting can explain (FINRA short interest 3,995,632 shares at 2026-04-30), so the share count is stale or wrong (common for annual 20-F foreign private issuers after a share issuance) and a percentage would be fabricated. Holder share counts are shown as filed.

Top holders

largest 100 of 401 · Δ vs 2025-Q4

#	Holder	Shares	Value	% of shares out	Δ QoQ
1	BlackRock, Inc.	9,047,2729.0M	$718M	—	—
2	VANGUARD PORTFOLIO MANAGEMENT LLC	3,353,2413.4M	$266M	—	NEW†
3	Conestoga Capital Advisors, LLC	2,804,4752.8M	$223M	—	—
4	VANGUARD CAPITAL MANAGEMENT LLC	2,798,9272.8M	$222M	—	NEW†
5	WASATCH ADVISORS LP	2,582,2202.6M	$205M	—	TRIM -31%
6	STATE STREET CORP	2,389,1972.4M	$190M	—	ADD 4%
7	Capital Research Global Investors	2,330,1652.3M	$185M	—	TRIM -6%
8	Capital International Investors	1,952,8202.0M	$155M	—	TRIM -2%
9	T. Rowe Price Investment Management, Inc.	1,699,4901.7M	$135M	—	TRIM -14%
10	Invesco Ltd.	1,653,4381.7M	$131M	—	TRIM -39%
11	GEODE CAPITAL MANAGEMENT, LLC	1,553,1631.6M	$123M	—	—
12	JPMORGAN CHASE & CO	1,358,8741.4M	$107M	—	TRIM -7%
13	WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC	1,257,0921.3M	$100M	—	TRIM -14%
14	SILVERCREST ASSET MANAGEMENT GROUP LLC	1,252,0421.3M	$99M	—	TRIM -7%
15	WELLINGTON MANAGEMENT GROUP LLP	1,211,8021.2M	$96M	—	TRIM -7%
16	MORGAN STANLEY	1,195,2941.2M	$95M	—	TRIM -12%
17	GENEVA CAPITAL MANAGEMENT LLC	1,163,0871.2M	$92M	—	TRIM -8%
18	Clearbridge Investments, LLC	1,141,7291.1M	$91M	—	ADD 52%
19	EARNEST PARTNERS LLC	1,133,0771.1M	$90M	—	TRIM -3%
20	DIMENSIONAL FUND ADVISORS LP	1,067,1321.1M	$85M	—	ADD 3%
21	GOLDMAN SACHS GROUP INC	1,050,7701.1M	$83M	—	ADD 17%
22	NEUBERGER BERMAN GROUP LLC	953,777953,777	$76M	—	TRIM -9%
23	UBS Group AG	932,817932,817	$74M	—	ADD 11%
24	Pictet Asset Management Holding SA	924,375924,375	$73M	—	TRIM -7%
25	NOMURA ASSET MANAGEMENT INTERNATIONAL INC.	835,425835,425	$66M	—	TRIM -11%
26	WESTFIELD CAPITAL MANAGEMENT CO LP	822,492822,492	$65M	—	TRIM -51%
27	AMERIPRISE FINANCIAL INC	780,338780,338	$62M	—	ADD 2%
28	Allspring Global Investments Holdings, LLC	721,890721,890	$59M	—	ADD 3%
29	VOYA INVESTMENT MANAGEMENT LLC	724,354724,354	$57M	—	ADD 6%
30	BAMCO INC /NY/	718,461718,461	$57M	—	ADD 61%
31	NORTHERN TRUST CORP	711,776711,776	$56M	—	—
32	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	652,700652,700	$52M	—	TRIM -3%
33	BROWN ADVISORY INC	649,492649,492	$52M	—	—
34	LOOMIS SAYLES & CO L P	608,654608,654	$48M	—	TRIM -7%
35	BNP PARIBAS ASSET MANAGEMENT Holding S.A.	593,009593,009	$47M	—	ADD 18%
36	TimesSquare Capital Management, LLC	574,238574,238	$46M	—	TRIM -4%
37	LONDON CO OF VIRGINIA	532,707532,707	$42M	—	TRIM -3%
38	FRED ALGER MANAGEMENT, LLC	526,659526,659	$42M	—	ADD 17%
39	SEI INVESTMENTS CO	525,062525,062	$42M	—	TRIM -6%
40	Point72 Asset Management, L.P.	463,949463,949	$37M	—	NEW
41	SCHRODER INVESTMENT MANAGEMENT GROUP	448,049448,049	$35M	—	NEW
42	BANK OF AMERICA CORP /DE/	438,906438,906	$35M	—	TRIM -29%
43	VANGUARD FIDUCIARY TRUST CO	436,116436,116	$35M	—	NEW
44	SEGALL BRYANT & HAMILL, LLC	426,703426,703	$34M	—	TRIM -2%
45	Woodline Partners LP	415,406415,406	$33M	—	ADD 781%
46	Bank of New York Mellon Corp	396,195396,195	$31M	—	TRIM -3%
47	Capital World Investors	392,100392,100	$31M	—	NEW
48	Select Equity Group, L.P.	391,974391,974	$31M	—	ADD 5%
49	FIFTH THIRD BANCORP	387,531387,531	$31M	—	ADD 5715%
50	Boston Trust Walden Corp	384,785384,785	$31M	—	ADD 23%
51	FRANKLIN RESOURCES INC	345,826345,826	$27M	—	TRIM -11%
52	Ranger Investment Management, L.P.	341,689341,689	$27M	—	—
53	DF DENT & CO INC	327,585327,585	$26M	—	TRIM -5%
54	Global Alpha Capital Management Ltd.	325,827325,827	$26M	—	—
55	PRINCIPAL FINANCIAL GROUP INC	305,665305,665	$24M	—	ADD 2%
56	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	292,603292,603	$23M	—	TRIM -6%
57	PRICE T ROWE ASSOCIATES INC /MD/	292,163292,163	$23M	—	TRIM -18%
58	BLAIR WILLIAM & CO/IL	290,464290,464	$23M	—	ADD 4%
59	RAYMOND JAMES FINANCIAL INC	284,290284,290	$23M	—	TRIM -7%
60	Harvey Partners, LLC	281,500281,500	$22M	—	ADD 44%
61	ENVESTNET ASSET MANAGEMENT INC	276,629276,629	$22M	—	ADD 7%
62	Zimmer Partners, LP	257,694257,694	$20M	—	ADD 1596%
63	Rockefeller Capital Management L.P.	255,656255,656	$20M	—	ADD 36%
64	Granahan Investment Management, LLC	250,262250,262	$20M	—	TRIM -3%
65	Aberdeen Group plc	249,564249,564	$20M	—	ADD 33%
66	GW&K Investment Management, LLC	232,277232,277	$18M	—	ADD 2%
67	Public Sector Pension Investment Board	223,578223,578	$18M	—	ADD 3%
68	Tidal Investments LLC	221,882221,882	$18M	—	ADD 33%
69	KENNEDY CAPITAL MANAGEMENT LLC	211,037211,037	$17M	—	ADD 7%
70	THORNBURG INVESTMENT MANAGEMENT INC	203,167203,167	$16M	—	TRIM -17%
71	Aristotle Capital Boston, LLC	195,954195,954	$16M	—	ADD 14%
72	Summit Creek Advisors LLC	186,780186,780	$15M	—	TRIM -11%
73	CREDIT AGRICOLE S A	186,341186,341	$15M	—	TRIM -11%
74	Nuveen, LLC	174,944174,944	$14M	—	TRIM -67%
75	RIVERBRIDGE PARTNERS LLC	173,205173,205	$14M	—	NEW
76	RHUMBLINE ADVISERS	167,841167,841	$13M	—	ADD 4%
77	HALLSTATT ADVISORS L.P.	165,385165,385	$13M	—	ADD 14%
78	Granite Investment Partners, LLC	163,583163,583	$13M	—	TRIM -5%
79	JENNISON ASSOCIATES LLC	154,074154,074	$12M	—	TRIM -23%
80	OSTERWEIS CAPITAL MANAGEMENT INC	148,270148,270	$12M	—	TRIM -8%
81	Fenimore Asset Management Inc	146,534146,534	$12M	—	ADD 25%
82	Legal & General Group Plc	144,081144,081	$11M	—	TRIM -9%
83	Swiss National Bank	123,600123,600	$10M	—	—
84	Thrivent Financial for Lutherans	120,364120,364	$10M	—	TRIM -3%
85	California Public Employees Retirement System	120,248120,248	$10M	—	TRIM -24%
86	Russell Investments Group, Ltd.	119,559119,559	$9M	—	TRIM -29%
87	STATE OF WISCONSIN INVESTMENT BOARD	112,986112,986	$9M	—	TRIM -4%
88	BOOTHBAY FUND MANAGEMENT, LLC	111,109111,109	$9M	—	ADD 25%
89	PICTON MAHONEY ASSET MANAGEMENT	102,126102,126	$8M	—	NEW
90	GAMCO INVESTORS, INC. ET AL	99,20099,200	$8M	—	—
91	ROYAL BANK OF CANADA	96,94796,947	$8M	—	TRIM -4%
92	ALLIANCEBERNSTEIN L.P.	76,27676,276	$7M	—	TRIM -3%
93	AXIOM INVESTORS LLC /DE	92,00592,005	$7M	—	TRIM -54%
94	Catawba River Capital	87,10287,102	$7M	—	—
95	WELLS FARGO & COMPANY/MN	83,29783,297	$7M	—	TRIM -35%
96	LAZARD ASSET MANAGEMENT LLC	83,07983,079	$7M	—	ADD 8%
97	VICTORY CAPITAL MANAGEMENT INC	80,91080,910	$6M	—	TRIM -3%
98	NATIXIS ADVISORS, LLC	80,71280,712	$6M	—	ADD 57%
99	Impax Asset Management Group plc	80,00080,000	$6M	—	—
100	NICHOLAS COMPANY, INC.	79,02579,025	$6M	—	—

† a filer this large appearing as NEW usually reflects a renamed or succeeded filing entity (the old name stops filing the same quarter) — not a brand-new position.

Rows rank by the value each filer reported — 13F filers price their own positions, so a holder with fewer shares can rank just above one with more.

Holder trends· top 15 holders · shares held over 6 quarters

green added · red trimmed

Holder

2024-Q4

2025-Q1

2025-Q2

2025-Q3

2025-Q4

2026-Q1

Latest value

BlackRock, Inc.

4.8M

4.7M

4.6M

9.1M

9.0M

$718M

VANGUARD PORTFOLIO MANAGEMENT LLC

—

3.4M

$266M

Conestoga Capital Advisors, LLC

3.2M

2.9M

2.7M

2.9M

2.8M

$223M

VANGUARD CAPITAL MANAGEMENT LLC

—

2.8M

$222M

WASATCH ADVISORS LP

2.6M

3.0M

3.4M

3.7M

3.8M

2.6M

$205M

STATE STREET CORP

1.5M

1.4M

2.3M

2.4M

$190M

Capital Research Global Investors

1.2M

1.1M

1.4M

2.0M

2.5M

2.3M

$185M

Capital International Investors

1.4M

2.0M

$155M

T. Rowe Price Investment Management, Inc.

1.3M

1.4M

1.0M

1.7M

2.0M

1.7M

$135M

Invesco Ltd.

1.8M

2.2M

2.6M

2.4M

2.7M

1.7M

$131M

GEODE CAPITAL MANAGEMENT, LLC

1.4M

1.5M

1.6M

$123M

JPMORGAN CHASE & CO

2.0M

1.9M

1.7M

3.3M

1.5M

1.4M

$107M

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC

2.6M

2.2M

1.8M

1.5M

1.3M

$100M

SILVERCREST ASSET MANAGEMENT GROUP LLC

1.2M

1.1M

1.2M

1.3M

$99M

WELLINGTON MANAGEMENT GROUP LLP

1.6M

1.4M

1.1M

1.4M

1.3M

1.2M

$96M

Shares reported each quarter by the largest current holders. Green = added vs the prior filing, red = trimmed, grey = roughly held; a dash is a quarter with no 13F on file (a gap is skipped, not read as an exit). 13F is filed up to 45 days after quarter-end. Up to 40 quarters (10 years) available — use the selector above.

Institutional footprint by quarter

Line breaks are honest gaps — quarters with no 13F record, or a suppressed % — never interpolated. % of shares outstanding uses today's share count for every quarter (the only count stored).

Quarter	Holders	Shares held	% shares out	Value held
2026-Q1	401	74,587,800	—	$5.9B
2025-Q4

Short interest has its own tab now — open SI →

Source: SEC Form 13F — every institution manager (≥ $100M in 13F securities) reporting a long US-listed position, across ~10,250 filers over 10 years of history. 13F is long-only, US-listed, filed up to 45 days after quarter-end.

Activists & large holders· Schedule 13D/G beneficial owners · CWST

Large holders — 13G, passive (top 5 of 6 by % of class)

Holder

% of class

Type

As of

BlackRock, Inc.

14.3%

QII

2025-12-31

SEC →

WASATCH ADVISORS LP

5.6%

QII

2026-06-30

SEC →

Conestoga Capital Advisors, LLC

5.51%

QII

2024-12-31

SEC →

VANGUARD PORTFOLIO MANAGEMENT LLC

5.45%

QII

2026-03-31

SEC →

VANGUARD CAPITAL MANAGEMENT LLC

5.23%

QII

Institutional ownership· 13F filers holding CWST · 2026-Q1 methodology → sources →

401 holders

% of shares outstanding held

—

Shares held (13F)

74,587,800

Reporting holders

401

Top holders

largest 100 of 401 · Δ vs 2025-Q4

#	Holder	Shares	Value	% of shares out	Δ QoQ
1	BlackRock, Inc.	9,047,2729.0M	$718M	—	—
2	VANGUARD PORTFOLIO MANAGEMENT LLC	3,353,2413.4M	$266M	—	NEW†
3	Conestoga Capital Advisors, LLC	2,804,4752.8M	$223M	—	—
4	VANGUARD CAPITAL MANAGEMENT LLC	2,798,9272.8M	$222M	—	NEW†
5	WASATCH ADVISORS LP	2,582,2202.6M	$205M	—	TRIM -31%
6	STATE STREET CORP	2,389,1972.4M	$190M	—	ADD 4%
7	Capital Research Global Investors	2,330,1652.3M	$185M	—	TRIM -6%
8	Capital International Investors	1,952,8202.0M	$155M	—	TRIM -2%
9	T. Rowe Price Investment Management, Inc.	1,699,4901.7M	$135M	—	TRIM -14%
10	Invesco Ltd.	1,653,4381.7M	$131M	—	TRIM -39%
11	GEODE CAPITAL MANAGEMENT, LLC	1,553,1631.6M	$123M	—	—
12	JPMORGAN CHASE & CO	1,358,8741.4M	$107M	—	TRIM -7%
13	WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC	1,257,0921.3M	$100M	—	TRIM -14%
14	SILVERCREST ASSET MANAGEMENT GROUP LLC	1,252,0421.3M	$99M	—	TRIM -7%
15	WELLINGTON MANAGEMENT GROUP LLP	1,211,8021.2M	$96M	—	TRIM -7%
16	MORGAN STANLEY	1,195,2941.2M	$95M	—	TRIM -12%
17	GENEVA CAPITAL MANAGEMENT LLC	1,163,0871.2M	$92M	—	TRIM -8%
18	Clearbridge Investments, LLC	1,141,7291.1M	$91M	—	ADD 52%
19	EARNEST PARTNERS LLC	1,133,0771.1M	$90M	—	TRIM -3%
20	DIMENSIONAL FUND ADVISORS LP	1,067,1321.1M	$85M	—	ADD 3%
21	GOLDMAN SACHS GROUP INC	1,050,7701.1M	$83M	—	ADD 17%
22	NEUBERGER BERMAN GROUP LLC	953,777953,777	$76M	—	TRIM -9%
23	UBS Group AG	932,817932,817	$74M	—	ADD 11%
24	Pictet Asset Management Holding SA	924,375924,375	$73M	—	TRIM -7%
25	NOMURA ASSET MANAGEMENT INTERNATIONAL INC.	835,425835,425	$66M	—	TRIM -11%
26	WESTFIELD CAPITAL MANAGEMENT CO LP	822,492822,492	$65M	—	TRIM -51%
27	AMERIPRISE FINANCIAL INC	780,338780,338	$62M	—	ADD 2%
28	Allspring Global Investments Holdings, LLC	721,890721,890	$59M	—	ADD 3%
29	VOYA INVESTMENT MANAGEMENT LLC	724,354724,354	$57M	—	ADD 6%
30	BAMCO INC /NY/	718,461718,461	$57M	—	ADD 61%
31	NORTHERN TRUST CORP	711,776711,776	$56M	—	—
32	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	652,700652,700	$52M	—	TRIM -3%
33	BROWN ADVISORY INC	649,492649,492	$52M	—	—
34	LOOMIS SAYLES & CO L P	608,654608,654	$48M	—	TRIM -7%
35	BNP PARIBAS ASSET MANAGEMENT Holding S.A.	593,009593,009	$47M	—	ADD 18%
36	TimesSquare Capital Management, LLC	574,238574,238	$46M	—	TRIM -4%
37	LONDON CO OF VIRGINIA	532,707532,707	$42M	—	TRIM -3%
38	FRED ALGER MANAGEMENT, LLC	526,659526,659	$42M	—	ADD 17%
39	SEI INVESTMENTS CO	525,062525,062	$42M	—	TRIM -6%
40	Point72 Asset Management, L.P.	463,949463,949	$37M	—	NEW
41	SCHRODER INVESTMENT MANAGEMENT GROUP	448,049448,049	$35M	—	NEW
42	BANK OF AMERICA CORP /DE/	438,906438,906	$35M	—	TRIM -29%
43	VANGUARD FIDUCIARY TRUST CO	436,116436,116	$35M	—	NEW
44	SEGALL BRYANT & HAMILL, LLC	426,703426,703	$34M	—	TRIM -2%
45	Woodline Partners LP	415,406415,406	$33M	—	ADD 781%
46	Bank of New York Mellon Corp	396,195396,195	$31M	—	TRIM -3%
47	Capital World Investors	392,100392,100	$31M	—	NEW
48	Select Equity Group, L.P.	391,974391,974	$31M	—	ADD 5%
49	FIFTH THIRD BANCORP	387,531387,531	$31M	—	ADD 5715%
50	Boston Trust Walden Corp	384,785384,785	$31M	—	ADD 23%
51	FRANKLIN RESOURCES INC	345,826345,826	$27M	—	TRIM -11%
52	Ranger Investment Management, L.P.	341,689341,689	$27M	—	—
53	DF DENT & CO INC	327,585327,585	$26M	—	TRIM -5%
54	Global Alpha Capital Management Ltd.	325,827325,827	$26M	—	—
55	PRINCIPAL FINANCIAL GROUP INC	305,665305,665	$24M	—	ADD 2%
56	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	292,603292,603	$23M	—	TRIM -6%
57	PRICE T ROWE ASSOCIATES INC /MD/	292,163292,163	$23M	—	TRIM -18%
58	BLAIR WILLIAM & CO/IL	290,464290,464	$23M	—	ADD 4%
59	RAYMOND JAMES FINANCIAL INC	284,290284,290	$23M	—	TRIM -7%
60	Harvey Partners, LLC	281,500281,500	$22M	—	ADD 44%
61	ENVESTNET ASSET MANAGEMENT INC	276,629276,629	$22M	—	ADD 7%
62	Zimmer Partners, LP	257,694257,694	$20M	—	ADD 1596%
63	Rockefeller Capital Management L.P.	255,656255,656	$20M	—	ADD 36%
64	Granahan Investment Management, LLC	250,262250,262	$20M	—	TRIM -3%
65	Aberdeen Group plc	249,564249,564	$20M	—	ADD 33%
66	GW&K Investment Management, LLC	232,277232,277	$18M	—	ADD 2%
67	Public Sector Pension Investment Board	223,578223,578	$18M	—	ADD 3%
68	Tidal Investments LLC	221,882221,882	$18M	—	ADD 33%
69	KENNEDY CAPITAL MANAGEMENT LLC	211,037211,037	$17M	—	ADD 7%
70	THORNBURG INVESTMENT MANAGEMENT INC	203,167203,167	$16M	—	TRIM -17%
71	Aristotle Capital Boston, LLC	195,954195,954	$16M	—	ADD 14%
72	Summit Creek Advisors LLC	186,780186,780	$15M	—	TRIM -11%
73	CREDIT AGRICOLE S A	186,341186,341	$15M	—	TRIM -11%
74	Nuveen, LLC	174,944174,944	$14M	—	TRIM -67%
75	RIVERBRIDGE PARTNERS LLC	173,205173,205	$14M	—	NEW
76	RHUMBLINE ADVISERS	167,841167,841	$13M	—	ADD 4%
77	HALLSTATT ADVISORS L.P.	165,385165,385	$13M	—	ADD 14%
78	Granite Investment Partners, LLC	163,583163,583	$13M	—	TRIM -5%
79	JENNISON ASSOCIATES LLC	154,074154,074	$12M	—	TRIM -23%
80	OSTERWEIS CAPITAL MANAGEMENT INC	148,270148,270	$12M	—	TRIM -8%
81	Fenimore Asset Management Inc	146,534146,534	$12M	—	ADD 25%
82	Legal & General Group Plc	144,081144,081	$11M	—	TRIM -9%
83	Swiss National Bank	123,600123,600	$10M	—	—
84	Thrivent Financial for Lutherans	120,364120,364	$10M	—	TRIM -3%
85	California Public Employees Retirement System	120,248120,248	$10M	—	TRIM -24%
86	Russell Investments Group, Ltd.	119,559119,559	$9M	—	TRIM -29%
87	STATE OF WISCONSIN INVESTMENT BOARD	112,986112,986	$9M	—	TRIM -4%
88	BOOTHBAY FUND MANAGEMENT, LLC	111,109111,109	$9M	—	ADD 25%
89	PICTON MAHONEY ASSET MANAGEMENT	102,126102,126	$8M	—	NEW
90	GAMCO INVESTORS, INC. ET AL	99,20099,200	$8M	—	—
91	ROYAL BANK OF CANADA	96,94796,947	$8M	—	TRIM -4%
92	ALLIANCEBERNSTEIN L.P.	76,27676,276	$7M	—	TRIM -3%
93	AXIOM INVESTORS LLC /DE	92,00592,005	$7M	—	TRIM -54%
94	Catawba River Capital	87,10287,102	$7M	—	—
95	WELLS FARGO & COMPANY/MN	83,29783,297	$7M	—	TRIM -35%
96	LAZARD ASSET MANAGEMENT LLC	83,07983,079	$7M	—	ADD 8%
97	VICTORY CAPITAL MANAGEMENT INC	80,91080,910	$6M	—	TRIM -3%
98	NATIXIS ADVISORS, LLC	80,71280,712	$6M	—	ADD 57%
99	Impax Asset Management Group plc	80,00080,000	$6M	—	—
100	NICHOLAS COMPANY, INC.	79,02579,025	$6M	—	—

† a filer this large appearing as NEW usually reflects a renamed or succeeded filing entity (the old name stops filing the same quarter) — not a brand-new position.

Rows rank by the value each filer reported — 13F filers price their own positions, so a holder with fewer shares can rank just above one with more.

Holder trends· top 15 holders · shares held over 6 quarters

green added · red trimmed

Holder

2024-Q4

2025-Q1

2025-Q2

2025-Q3

2025-Q4

2026-Q1

Latest value

BlackRock, Inc.

4.8M

4.7M

4.6M

9.1M

9.0M

$718M

VANGUARD PORTFOLIO MANAGEMENT LLC

—

3.4M

$266M

Conestoga Capital Advisors, LLC

3.2M

2.9M

2.7M

2.9M

2.8M

$223M

VANGUARD CAPITAL MANAGEMENT LLC

—

2.8M

$222M

WASATCH ADVISORS LP

2.6M

3.0M

3.4M

3.7M

3.8M

2.6M

$205M

STATE STREET CORP

1.5M

1.4M

2.3M

2.4M

$190M

Capital Research Global Investors

1.2M

1.1M

1.4M

2.0M

2.5M

2.3M

$185M

Capital International Investors

1.4M

2.0M

$155M

T. Rowe Price Investment Management, Inc.

1.3M

1.4M

1.0M

1.7M

2.0M

1.7M

$135M

Invesco Ltd.

1.8M

2.2M

2.6M

2.4M

2.7M

1.7M

$131M

GEODE CAPITAL MANAGEMENT, LLC

1.4M

1.5M

1.6M

$123M

JPMORGAN CHASE & CO

2.0M

1.9M

1.7M

3.3M

1.5M

1.4M

$107M

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC

2.6M

2.2M

1.8M

1.5M

1.3M

$100M

SILVERCREST ASSET MANAGEMENT GROUP LLC

1.2M

1.1M

1.2M

1.3M

$99M

WELLINGTON MANAGEMENT GROUP LLP

1.6M

1.4M

1.1M

1.4M

1.3M

1.2M

$96M

Institutional footprint by quarter

Line breaks are honest gaps — quarters with no 13F record, or a suppressed % — never interpolated. % of shares outstanding uses today's share count for every quarter (the only count stored).

Quarter	Holders	Shares held	% shares out	Value held
2026-Q1	401	74,587,800	—	$5.9B
2025-Q4

Short interest has its own tab now — open SI →

Activists & large holders· Schedule 13D/G beneficial owners · CWST

Large holders — 13G, passive (top 5 of 6 by % of class)

Holder

% of class

Type

As of

BlackRock, Inc.

14.3%

QII

2025-12-31

SEC →

WASATCH ADVISORS LP

5.6%

QII

2026-06-30

SEC →

Conestoga Capital Advisors, LLC

5.51%

QII

2024-12-31

SEC →

VANGUARD PORTFOLIO MANAGEMENT LLC

5.45%

QII

2026-03-31

SEC →

VANGUARD CAPITAL MANAGEMENT LLC

5.23%

QII

CWST US Equity☆

Institutional ownership· 13F filers holding CWST · 2026-Q1 methodology → sources →

Top holders

Holder trends· top 15 holders · shares held over 6 quarters

Institutional footprint by quarter

Activists & large holders· Schedule 13D/G beneficial owners · CWST

Institutional ownership· 13F filers holding CWST · 2026-Q1 methodology → sources →

Top holders

Holder trends· top 15 holders · shares held over 6 quarters

Institutional footprint by quarter

Activists & large holders· Schedule 13D/G beneficial owners · CWST

CWST US Equity