AQWA additions & removals
Changes are observation-bounded: an addition is the first retained official snapshot containing a security after an earlier absence; a removal is its first retained absence. Baseline holdings receive no invented addition date.
Additions
| Ticker | Issuer | Observed date | Change |
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| NORTHWEST PIPE COMPANY | NORTHWEST PIPE COMPANY | 2025-05-31 | Added / first present |
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| PRIMO BRANDS CORPORATION | PRIMO BRANDS CORPORATION | 2025-05-31 | Added / first present |
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| FERGUSON ENTERPRISES INC. | FERGUSON ENTERPRISES INC. | 2024-08-31 | Added / first present |
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| CONSOLIDATED WATER CO. LTD. | CONSOLIDATED WATER CO. LTD. | 2023-11-30 | Added / first present |
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| THE YORK WATER COMPANY | THE YORK WATER COMPANY | 2023-05-31 | Added / first present |
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| ARTESIAN RESOURCES CORPORATION | ARTESIAN RESOURCES CORPORATION | 2023-05-31 | Added / first present |
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| FERGUSON PLC | FERGUSON PLC | 2022-11-30 | Added / first present |
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| ZURN ELKAY WATER SOLUTIONS CORPORATION | ZURN ELKAY WATER SOLUTIONS CORPORATION | 2022-11-30 | Added / first present |
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| Core & Main Inc | Core & Main Inc | 2022-11-30 | Added / first present |
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| United States of America | United States of America | 2022-02-28 | Added / first present |
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Removals
| Ticker | Issuer | Observed date | Change |
|---|
| ARTESIAN RESOURCES CORPORATION | ARTESIAN RESOURCES CORPORATION | 2025-05-31 | Removed / first absent |
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| FERGUSON PLC | FERGUSON PLC | 2024-08-31 | Removed / first absent |
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| United States of America | United States of America | 2022-05-31 | Removed / first absent |
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| ECOLAB INC. | ECOLAB INC. | 2025-05-31 | Removed / first absent |
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| AMERICAN WATER WORKS COMPANY, INC. | AMERICAN WATER WORKS COMPANY, INC. | 2025-11-30 | Removed / first absent |
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| AMERICAN STATES WATER COMPANY | AMERICAN STATES WATER COMPANY | 2025-11-30 | Removed / first absent |
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| BADGER METER, INC. | BADGER METER, INC. | 2025-11-30 | Removed / first absent |
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| EVOQUA WATER TECHNOLOGIES CORP. | EVOQUA WATER TECHNOLOGIES CORP. | 2023-05-31 | Removed / first absent |
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| SELECT ENERGY SERVICES, INC. | SELECT ENERGY SERVICES, INC. | 2023-05-31 | Removed / first absent |
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| FORTERRA, INC. | FORTERRA, INC. | 2022-05-31 | Removed / first absent |
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