Impax Asset Management 13F, Q1 2026
Impax Asset Management · quarter ending 31 March 2026 · filed 12 May 2026 · SEC CIK 1749768
Common stock only: shares the fund reported owning at the quarter end, valued as filed.
Largest positions, Q1 2026
The 25 largest of 287 positions. Weights are against the whole filed book. Changes are in shares held, against the Q4 2025 filing.
| Company | Ticker | Value | % of book | vs Q4 2025 |
|---|---|---|---|---|
| Linde PLC | $848.63M | 5.9% | -7% shares | |
| NVIDIA Corp | NVDA | $635.01M | 4.4% | +20% shares |
| Xylem Inc/NY | XYL | $547.97M | 3.8% | -6% shares |
| KLA Corp | KLAC | $535.65M | 3.7% | +71% shares |
| Microsoft Corp | MSFT | $440.09M | 3.1% | -25% shares |
| American Water Works Co Inc | AWK | $383.40M | 2.7% | +18% shares |
| Waste Connections Inc | WCN | $343.95M | 2.4% | +340% shares |
| Hubbell Inc | HUBB | $335.06M | 2.3% | -17% shares |
| Aptiv PLC | $318.84M | 2.2% | +8% shares | |
| Veralto Corp | VLTO | $298.51M | 2.1% | +7% shares |
| A O Smith Corp | AOS | $282.11M | 2.0% | -8% shares |
| Vertiv Holdings Co | VRT | $271.75M | 1.9% | -10% shares |
| Advanced Drainage Systems Inc | WMS | $264.32M | 1.8% | -7% shares |
| Cintas Corp | CTAS | $254.31M | 1.8% | +12% shares |
| eBay Inc | EBAY | $247.20M | 1.7% | -13% shares |
| Marvell Technology Inc | MRVL | $229.22M | 1.6% | -26% shares |
| Ecolab Inc | ECL | $228.59M | 1.6% | +19% shares |
| Agilent Technologies Inc | A | $210.20M | 1.5% | -29% shares |
| Cia de Saneamento Basico do Es | SBS | $205.71M | 1.4% | -7% shares |
| Itron Inc | ITRI | $196.57M | 1.4% | +62% shares |
| RenaissanceRe Holdings Ltd | $189.55M | 1.3% | -34% shares | |
| Union Pacific Corp | UNP | $181.53M | 1.3% | +9% shares |
| IDEX Corp | IEX | $179.68M | 1.3% | -45% shares |
| Watts Water Technologies Inc | WTS | $170.70M | 1.2% | -9% shares |
| Cadence Design Systems Inc | CDNS | $164.88M | 1.1% | +10% shares |
What changed since Q4 2025
Against the Q4 2025 filing, Impax Asset Management opened 29 new positions, added to 110, trimmed 111, left 37 unchanged and exited 21. Every position is compared, matched on its CUSIP; a change of 2% or less in shares counts as unchanged.
New positions
and 21 more
Exited
- Pinnacle Financial Partners Inwas $41.30M
- GPKwas $14.30M
- TRSwas $8.15M
- CIENwas $7.31M
- WSCwas $5.18M
- HPQwas $4.80M
- HHHwas $4.44M
- VCwas $3.80M
and 13 more
Other quarters
Source: SEC Form 13F-HR, accession 0001749768-26-000002, filed by Impax Asset Management Group plc. Values are as filed and cover US-listed positions only; a 13F does not show short positions or holdings outside the US. A 13F may be filed up to 45 days after the quarter ends, so the fund may have traded since. Educational information, not financial advice.