Impax Asset Management Group plc
Long book
$14.35B
Q1 2026
Positions
287
Top-10 weight
33%
concentration
Last quarter
+13.2%
SPY +14.8%
Turnover
16%
of book per quarter
Strategy in plain words
auto-generated from filingsImpax Asset Management Group plc is an institutional manager, running a $14.35B US long book across 287 positions.
The portfolio is moderately concentrated (top 10 ≈ 33% of the book). Turnover is modest: positions are typically held for years. Current anchor positions: LINDE PLC, NVIDIA CORP, XYLEM INC, KLA CORP, MICROSOFT CORP.
Over the last 9 quarters its long book ran on average 1.5pp per quarter behind the S&P 500, beating the index in 4 of 9 quarters. Signal value of individual moves is limited — treat changes as weak evidence.
Implied long-book return vs S&P 500
methodology: positions priced quarterly, no shorts/options Fund long book S&P 500
Q1 2024
-1.9%
Q2 2024
+9.2%
Q3 2024
-5.2%
Q4 2024
-3.3%
Q1 2025
+11.0%
Q2 2025
+7.1%
Q3 2025
-2.1%
Q4 2025
-1.7%
Q1 2026
+13.2%
Sector allocation
Technology 28%
Industrials 23%
Other 11%
Healthcare 8%
Utilities 7%
Materials 6%
Services media 6%
Financials 5%
Long book by quarter
What does Impax Asset own?
Q1 2026 13F| Company | Sector | Shares | Value | % of book | Change |
|---|---|---|---|---|---|
| LIN LINDE PLC | Materials | 1.7M | $848.6M | 5.9% | -7.1% |
| NVDA NVIDIA CORP | Technology | 3.6M | $635.0M | 4.4% | +20.0% |
| XYL XYLEM INC | Industrials | 4.6M | $548.0M | 3.8% | -6.1% |
| KLAC KLA CORP | Other | 363.8K | $535.6M | 3.7% | +71.2% |
| MSFT MICROSOFT CORP | Technology | 1.2M | $440.1M | 3.1% | -25.3% |
| AWK AMERICAN WATER WORKS CO INC | Utilities | 2.8M | $383.4M | 2.7% | +18.0% |
| WCN WASTE CONNECTIONS INC | Utilities | 2.1M | $344.0M | 2.4% | +339.6% |
| HUBB HUBBELL INC | Technology | 682.8K | $335.1M | 2.3% | -16.8% |
| APTV APTIV PLC | Industrials | 4.6M | $318.8M | 2.2% | +7.5% |
| VLTO VERALTO CORP | Technology | 3.4M | $298.5M | 2.1% | +7.3% |
| AOS SMITH (A.O.) CORP | Industrials | 4.3M | $282.1M | 2.0% | -8.0% |
| VRT VERTIV HOLDINGS CO-A | Technology | 1.1M | $271.7M | 1.9% | -10.2% |
| WMS ADVANCED DRAINAGE SYSTEMS IN | Other | 1.9M | $264.3M | 1.8% | -6.7% |
| CTAS CINTAS CORP | Other | 1.5M | $254.3M | 1.8% | +11.7% |
| EBAY EBAY INC | Services media | 2.7M | $247.2M | 1.7% | -13.4% |
| MRVL MARVELL TECHNOLOGY INC | Technology | 2.3M | $229.2M | 1.6% | -26.4% |
| ECL ECOLAB INC | Other | 859.3K | $228.6M | 1.6% | +18.5% |
| A AGILENT TECHNOLOGIES INC | Healthcare | 1.8M | $210.2M | 1.5% | -29.0% |
| ITRI ITRON INC | Technology | 2.2M | $196.6M | 1.4% | +61.8% |
| RNR RENAISSANCERE HOLDINGS LTD | Financials | 637.7K | $189.5M | 1.3% | -34.2% |
| UNP UNION PACIFIC CORP | Industrials | 748.2K | $181.5M | 1.3% | +8.5% |
| IEX IDEX CORP | Industrials | 947.9K | $179.7M | 1.3% | -44.5% |
| WTS WATTS WATER TECHNOLOGIES-A | Industrials | 588.0K | $170.7M | 1.2% | -9.2% |
| CDNS CADENCE DESIGN SYS INC | Technology | 593.4K | $164.9M | 1.1% | +10.2% |
| TEL TE CONNECTIVITY PLC | Consumer discretionary | 744.4K | $155.6M | 1.1% | -2.7% |
| ZTS ZOETIS INC | Healthcare | 1.3M | $155.0M | 1.1% | -16.9% |
| PNR PENTAIR PLC | Industrials | 1.7M | $149.4M | 1.0% | -48.2% |
| MAS MASCO CORP | Industrials | 2.4M | $143.5M | 1.0% | -12.3% |
| CNM CORE & MAIN INC-CLASS A | Consumer discretionary | 2.9M | $140.9M | 1.0% | -0.7% |
| MA MASTERCARD INC - A | Services media | 279.5K | $139.7M | 1.0% | -15.9% |
| SNPS SYNOPSYS INC | Technology | 315.5K | $125.1M | 0.9% | -28.7% |
| FELE FRANKLIN ELECTRIC CO INC | Industrials | 1.3M | $119.5M | 0.8% | +15.6% |
| AAON AAON INC | Industrials | 1.4M | $118.9M | 0.8% | +2.3% |
| LFUS LITTELFUSE INC | Industrials | 345.7K | $117.3M | 0.8% | -23.9% |
| ACM AECOM | Services media | 1.4M | $117.3M | 0.8% | -0.7% |
| ZWS ZURN ELKAY WATER SOLUTIONS C | Industrials | 2.6M | $117.0M | 0.8% | -10.7% |
| TTEK TETRA TECH INC | Services media | 3.8M | $115.4M | 0.8% | +19.4% |
| SITE SITEONE LANDSCAPE SUPPLY INC | Consumer discretionary | 824.4K | $109.7M | 0.8% | -10.0% |
| AAPL APPLE INC | Technology | 421.3K | $106.9M | 0.7% | +14.4% |
| MPWR MONOLITHIC POWER SYSTEMS INC | Technology | 88.5K | $96.7M | 0.7% | -16.7% |
| TT TRANE TECHNOLOGIES PLC | Technology | 228.8K | $95.4M | 0.7% | -9.5% |
| WAT WATERS CORP | Healthcare | 314.6K | $93.7M | 0.7% | +35.5% |
| QXO QXO INC | Consumer discretionary | 4.7M | $91.5M | 0.6% | +275.0% |
| VMI VALMONT INDUSTRIES | Industrials | 227.1K | $90.7M | 0.6% | -12.9% |
| AMAT APPLIED MATERIALS INC | Technology | 259.6K | $88.7M | 0.6% | -69.6% |
| BSX BOSTON SCIENTIFIC CORP | Healthcare | 1.4M | $85.3M | 0.6% | -21.1% |
| MWA MUELLER WATER PRODUCTS INC-A | Industrials | 2.9M | $81.0M | 0.6% | -12.4% |
| ORA ORMAT TECHNOLOGIES INC | Utilities | 723.1K | $80.9M | 0.6% | +6.8% |
| WAB WABTEC CORP | Industrials | 318.4K | $79.6M | 0.6% | +54.2% |
| ADSK AUTODESK INC | Technology | 327.6K | $78.4M | 0.5% | -6.4% |
13F filing history
| Period | Form | Filed | Entries | Reported value | Flags | Source |
|---|---|---|---|---|---|---|
| Q1 2026 | 13F-HR | May 12, 2026 | 287 | $14.35B | canonical | SEC ↗ |
| Q4 2025 | 13F-HR | Jan 29, 2026 | 279 | $15.98B | canonical | SEC ↗ |
| Q3 2025 | 13F-HR | Nov 6, 2025 | 275 | $17.14B | canonical | SEC ↗ |
| Q2 2025 | 13F-HR | Aug 8, 2025 | 280 | $17.39B | canonical | SEC ↗ |
| Q1 2025 | 13F-HR | Apr 29, 2025 | 295 | $16.61B | canonical | SEC ↗ |
| Q4 2024 | 13F-HR | Feb 4, 2025 | 312 | $22.08B | canonical | SEC ↗ |
| Q3 2024 | 13F-HR/ARESTATEMENT | Nov 6, 2024 | 313 | $25.40B | canonical | SEC ↗ |
| Q3 2024 | 13F-HR | Oct 30, 2024 | 311 | $25.37B | SEC ↗ | |
| Q2 2024 | 13F-HR/ARESTATEMENT | Nov 8, 2024 | 315 | $24.57B | canonical | SEC ↗ |
| Q2 2024 | 13F-HR | Aug 5, 2024 | 313 | $24.54B | SEC ↗ | |
| Q1 2024 | 13F-HR | Apr 30, 2024 | 308 | $26.13B | canonical | SEC ↗ |
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