Position in ZWS
as of Mar 31, 2026
· filed May 7, 2026
Position Value
$13,362,320
-$459,157 QoQ
Shares Held
298,000
+0.2% QoQ
Ownership
0.179%
of shares outstanding
% of Portfolio
0.01%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Dec 2021
18 quarters on record
Voting authority
Sole 100.ToString("F0")%
Shared 0.ToString("F0")%
None 0.ToString("F0")%
Common Shares in ZWS Over Time
Shares Held
Position Value (USD)
Position in Pollution & Treatment Controls
Industrials · as of Mar 31, 2026Swiss National Bank holds $83,799,002 across 5 Pollution & Treatment Controls names. ZWS ranks #2 (15.9% of the industry book) .
All Filings in ZWS
Export CSV
18 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $13,362,320 | 298,000 | Shares | Sole | 2026-05-07 | |
| 2025-12-31 | $13,821,477 | 297,300 | Shares | Sole | 2026-02-12 | |
| 2025-09-30 | $13,803,305 | 293,500 | Shares | Sole | 2025-11-13 | |
| 2025-06-30 | $10,616,271 | 290,300 | Shares | Sole | 2025-08-12 | |
| 2025-03-31 | $9,217,910 | 279,500 | Shares | Sole | 2025-05-12 | |
| 2024-12-31 | $10,656,610 | 285,700 | Shares | Sole | 2025-02-10 | |
| 2024-09-30 | $10,300,404 | 286,600 | Shares | Sole | 2024-11-07 | |
| 2024-06-30 | $8,455,440 | 287,600 | Shares | Sole | 2024-08-08 | |
| 2024-03-31 | $9,696,259 | 289,700 | Shares | Sole | 2024-05-07 | |
| 2023-12-31 | $8,520,077 | 289,700 | Shares | Sole | 2024-02-06 | |
| 2023-09-30 | $9,137,322 | 326,100 | Shares | Sole | 2023-11-08 | |
| 2023-06-30 | $8,747,317 | 325,300 | Shares | Sole | 2023-08-09 | |
| 2023-03-31 | $8,195,832 | 383,700 | Shares | Sole | 2023-05-10 | |
| 2022-12-31 | $9,077,580 | 429,200 | Shares | Sole | 2023-02-08 | |
| 2022-09-30 | $7,318,150 | 298,700 | Shares | Sole | 2022-11-09 | |
| 2022-06-30 | $8,068,488 | 296,200 | Shares | Sole | 2022-08-09 | |
| 2022-03-31 | $10,156,260 | 286,900 | Shares | Sole | 2022-05-09 | |
| 2021-12-31 | $9,704,240 | 266,600 | Shares | Sole | 2022-02-08 | |
| No filing history on record for this holder in this stock. | ||||||