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Impax Asset Management Group PLC

13F for the quarter to June 30, 2026, filed August 11, 2026 · SEC CIK 1749768

Reported value
$15.4bn
99% in companies we cover
Positions we cover
279
Largest KLAC 4.9%
Copy, a year
+14.3%
S&P 500 +15.3%
Copy Sharpe ratio
0.62
S&P 500 0.71

How copying its 13F would have done

$10.0k$20.0k 201820192020202120222023202420252026 $31.2k$29.0k
CopyS&P 500 $10,000 copying Impax Asset Management Group PLC's filed holdings in companies we cover from November 16, 2018, buying on the first trading day after each 13F was filed and holding until the next, against the S&P 500 (total return). Marked weekly, log scale. Before costs and taxes; misses trading within each quarter and anything 13F does not show (shorts, cash, bonds, non-US holdings).

Biggest drop −33.2% (S&P 500 −31.8%); beta 1.03; alpha −0.9% a year (t = −0.35); last 12 months +8.7% against +12.1%.

Reported value by quarter

Impax Asset Management Group PLC: 13F reported value Total value of all positions in each quarter's 13F, as filed (values before 2023 were filed in thousands of dollars and are converted).
$0 $10T $20T $30T Reported value, 2018-09-30: $7B Reported value, 2018-12-31: $6.1B Reported value, 2019-03-31: $7.3B Reported value, 2019-06-30: $7.7B Reported value, 2019-09-30: $7.7B Reported value, 2019-12-31: $9B Reported value, 2020-03-31: $7.5B Reported value, 2020-06-30: $9.7B Reported value, 2020-09-30: $11.4B Reported value, 2020-12-31: $15.7B Reported value, 2021-03-31: $19.5B Reported value, 2021-06-30: $22.7B Reported value, 2021-09-30: $24.3B Reported value, 2021-12-31: $27.3B Reported value, 2022-03-31: $24.2B Reported value, 2022-06-30: $20.5B Reported value, 2022-09-30: $19.5B Reported value, 2022-12-31: $22.4T Reported value, 2023-03-31: $23.9B Reported value, 2023-06-30: $24.9B Reported value, 2023-09-30: $22.4B Reported value, 2023-12-31: $24.9B Reported value, 2024-03-31: $26.1B Reported value, 2024-06-30: $24.6B Reported value, 2024-09-30: $25.4B Reported value, 2024-12-31: $22.1B Reported value, 2025-03-31: $16.6B Reported value, 2025-06-30: $17.4B Reported value, 2025-09-30: $17.1B Reported value, 2025-12-31: $16B Reported value, 2026-03-31: $14.3B Reported value, 2026-06-30: $15.4B 2018-09-30 2020-06-30 2022-03-31 2023-12-31 2026-06-30 $15.4B
View chart data
Period Reported value
2018-09-30 $7B
2018-12-31 $6.1B
2019-03-31 $7.3B
2019-06-30 $7.7B
2019-09-30 $7.7B
2019-12-31 $9B
2020-03-31 $7.5B
2020-06-30 $9.7B
2020-09-30 $11.4B
2020-12-31 $15.7B
2021-03-31 $19.5B
2021-06-30 $22.7B
2021-09-30 $24.3B
2021-12-31 $27.3B
2022-03-31 $24.2B
2022-06-30 $20.5B
2022-09-30 $19.5B
2022-12-31 $22.4T
2023-03-31 $23.9B
2023-06-30 $24.9B
2023-09-30 $22.4B
2023-12-31 $24.9B
2024-03-31 $26.1B
2024-06-30 $24.6B
2024-09-30 $25.4B
2024-12-31 $22.1B
2025-03-31 $16.6B
2025-06-30 $17.4B
2025-09-30 $17.1B
2025-12-31 $16B
2026-03-31 $14.3B
2026-06-30 $15.4B

Holdings and moves

CompanyShare of portfolioValueSharesChange in shares
KLACKLA Corporation4.87%$749.0m2.48M+582.4% Added
NVDANVIDIA Corporation4.85%$744.9m3.72M+2.2% Added
LINLinde plc4.79%$736.6m1.42M−17.1% Reduced
XYLXylem Inc.3.44%$528.3m4.47M−2.5% Reduced
MSFTMicrosoft Corporation3.28%$503.8m1.35M+13.6% Added
AWKAmerican Water Works3.07%$471.5m3.58M+27.2% Added
VLTOVeralto2.99%$459.9m5.19M+53.6% Added
CTASCintas2.67%$410.5m2.41M+60.5% Added
WCNWaste Connections, Inc.2.15%$329.9m1.98M−6.5% Reduced
SBSCompanhia DE Saneamento Basico DO Estado DE SAO Paulo-sabesp1.97%$302.4m52.32M+676.1% Added
WMSAdvanced Drainage Systems, Inc.1.89%$289.7m1.85M−4.2% Reduced
ECLEcolab1.79%$275.4m988.4K+15.0% Added
HUBBHubbell Incorporated1.66%$254.7m486.9K−28.7% Reduced
APTVAptiv1.63%$250.9m4.09M−11.0% Reduced
VRTVertiv1.59%$244.3m729.5K−32.7% Reduced
AAgilent Technologies1.45%$222.5m1.67M−9.2% Reduced
IEXIDEX Corporation1.42%$218.3m962.0K+1.5% Added
WTSWatts Water Technologies Inc1.38%$212.7m543.4K−7.6% Reduced
APHAmphenol1.37%$210.8m1.20M+246.9% Added
CNMCore & Main, Inc.1.32%$202.8m4.20M+47.4% Added
MRVLMarvell Technology1.28%$196.7m660.3K−71.5% Reduced
RNRRenaissancere Holdings LTD1.27%$195.0m615.4K−3.5% Reduced
AOSA. O. Smith1.15%$176.5m2.81M−34.2% Reduced
AMATApplied Materials1.14%$175.6m242.8K−6.5% Reduced
ITRIItron, Inc.1.08%$166.7m1.93M−12.1% Reduced
MASMasco1.08%$165.3m2.03M−14.5% Reduced
MAMastercard1.06%$163.2m317.7K+13.7% Added
CDNSCadence Design Systems Inc1.04%$160.1m426.6K−28.1% Reduced
PNRPentair1.04%$160.0m2.09M+21.7% Added
TELTE Connectivity1.00%$153.8m762.7K+2.5% Added
WABWabtec0.98%$150.6m558.8K+75.5% Added
ACMAecom0.97%$148.6m2.13M+53.9% Added
SNPSSynopsys Inc0.97%$148.5m332.9K+5.5% Added
DEDeere & Company0.95%$146.0m230.1K+1141.8% Added
BMIBadger Meter Inc0.91%$140.3m945.7KNew
ZWSZurn Elkay Water Solutions Corp0.87%$133.1m2.63M+0.9% Added
VMIValmont Industries Inc0.85%$130.6m226.1K−0.4%
FELEFranklin Electric Co Inc0.82%$126.0m1.18M−9.3% Reduced
UNPUnion Pacific Corporation0.81%$123.9m455.3K−39.1% Reduced
PNFPPinnacle Financial Partners, Inc.0.75%$115.2m1.14M+175.6% Added
TTEKTetra Tech Inc0.74%$113.6m3.93M+2.7% Added
AAPLApple Inc.0.68%$105.0m363.0K−13.8% Reduced
NEENextEra Energy0.67%$103.2m1.18M+2495.4% Added
QXOQXO, Inc.0.66%$101.3m5.86M+24.4% Added
TTTrane Technologies0.65%$99.2m202.0K−11.7% Reduced
ADSKAutodesk, Inc.0.63%$97.3m500.7K+52.8% Added
SITESiteone Landscape Supply, Inc.0.62%$95.7m836.4K+1.5% Added
LFUSLittelfuse Inc0.58%$89.8m197.3K−42.9% Reduced
MPWRMonolithic Power Systems, Inc.0.57%$87.7m63.4K−28.3% Reduced
CFGCitizens Financial Group0.50%$77.5m1.11M−13.2% Reduced
MWAMueller Water Products, Inc.0.50%$76.6m2.97M+0.7% Added
GNRCGenerac0.49%$75.1m256.6K−23.7% Reduced
CARRCarrier Global0.44%$67.4m918.4K−21.9% Reduced
TREXTrex Co Inc0.42%$65.3m1.30M−26.2% Reduced
NXTNextpower Inc.0.39%$60.1m504.3K+187.1% Added
TMOThermo Fisher Scientific0.39%$59.4m118.4K+0.6% Added
GOOGLAlphabet Inc. (Class A)0.38%$58.5m163.7K−16.0% Reduced
ISRGIntuitive Surgical0.37%$57.0m143.4K+6.8% Added
MRSHMarsh McLennan0.37%$56.6m339.9K+0.6% Added
ORAOrmat Technologies, Inc.0.36%$55.9m513.0K−29.1% Reduced
EBAYeBay Inc.0.36%$55.0m491.8K−81.9% Reduced
AMZNAmazon0.36%$54.8m230.1K−23.0% Reduced
RGENRepligen Corp0.35%$54.1m396.5K−9.6% Reduced
AVGOBroadcom0.35%$53.8m142.3K−16.4% Reduced
NVTnVent Electric plc0.34%$51.5m303.4K−42.5% Reduced
TRMBTrimble Inc.0.33%$50.3m983.5K+2.2% Added
BSYBentley Systems Inc0.32%$49.5m1.66M−1.2% Reduced
BSXBoston Scientific0.32%$49.5m1.16M−14.7% Reduced
NOWServiceNow0.30%$46.9m472.0K+3.9% Added
PGRProgressive Corporation0.29%$44.7m204.8K−7.5% Reduced
MTDMettler Toledo0.29%$44.6m34.9K+7.4% Added
VCTRVictory Capital Holdings, Inc.0.29%$44.1m525.0K−19.2% Reduced
AAONAAON, Inc.0.28%$43.5m343.2K−76.1% Reduced
TYLTyler Technologies Inc0.27%$41.9m143.1K−12.9% Reduced
LGNDLigand Pharmaceuticals Inc0.27%$41.1m130.0K−14.7% Reduced
LLYLilly (Eli)0.25%$38.9m32.4K−17.5% Reduced
ONONOn Holding AG0.24%$36.6m1.03M+53.6% Added
URIUnited Rentals0.23%$35.9m31.7K−31.5% Reduced
MUMicron Technology0.23%$34.9m30.3K+5.5% Added
MELIMercadolibre Inc0.22%$34.3m20.2K+2.3% Added
JNJJohnson & Johnson0.22%$34.1m134.4K+14.5% Added
PTCPTC Inc.0.22%$33.3m293.4K−2.1% Reduced
HDBHdfc Bank LTD0.21%$31.6m1.22M−4.0% Reduced
LRCXLam Research0.19%$28.8m66.4K−3.8% Reduced
EBCEastern Bankshares, Inc.0.18%$28.4m1.27M0.0%
GILDGilead Sciences0.18%$28.3m224.3K+6.4% Added
AMDAdvanced Micro Devices0.18%$27.6m47.4K−4.8% Reduced
MITKMitek Systems Inc0.18%$27.3m1.36M−5.2% Reduced
INTCIntel0.18%$27.1m194.0K+19.2% Added
NBIXNeurocrine Biosciences Inc0.17%$27.0m160.0K+113.3% Added
MRKMerck & Co.0.17%$26.2m204.2K+35.3% Added
WMWaste Management0.17%$25.7m115.3K−1.4% Reduced
AAMIAcadian Asset Management Inc.0.16%$25.0m350.0K−57.5% Reduced
ABTAbbott Laboratories0.16%$24.7m272.4K+31.8% Added
ORCLOracle Corporation0.16%$24.2m165.4K−13.7% Reduced
CCitigroup0.16%$24.2m172.7K−0.1%
TDCTeradata Corp0.15%$23.7m684.5K+25.1% Added
SIBNSi-bone, Inc.0.15%$23.3m1.43M0.0%
VVisa Inc.0.15%$22.5m65.6K+21.2% Added
GEVGE Vernova0.15%$22.5m19.1K−20.0% Reduced
ONTOOnto Innovation Inc.0.14%$22.4m59.1K0.0%
QCOMQualcomm0.14%$21.5m116.4K+38.3% Added
DARDarling Ingredients Inc.0.14%$21.2m388.5K−49.6% Reduced
VOYAVoya Financial, Inc.0.13%$20.6m227.2K+9.1% Added
EIXEdison International0.13%$20.5m275.4K+39.2% Added
NTCTNetscout Systems Inc0.13%$20.5m470.0K−10.0% Reduced
NPOEnpro Inc.0.13%$20.3m53.8K+12.1% Added
STTState Street Corporation0.13%$20.2m119.4K+10.3% Added
ADCAgree Realty Corp0.13%$19.7m260.0K0.0%
EXTRExtreme Networks Inc0.13%$19.2m593.7K−38.5% Reduced
DYDycom Industries Inc0.12%$19.1m37.7K+25.8% Added
PCRXPacira Biosciences, Inc.0.12%$19.0m750.0K0.0%
CMGChipotle Mexican Grill0.12%$18.7m551.5K+6.6% Added
DHRDanaher Corporation0.12%$18.7m98.0K−70.6% Reduced
JPMJPMorgan Chase0.12%$18.5m56.4K0.0%
CLHClean Harbors Inc0.12%$18.4m61.7K−49.9% Reduced
USFDUS Foods Holding Corp.0.12%$18.4m180.0K0.0%
TEVATeva Pharmaceutical Industries LTD0.12%$18.1m534.6KNew
DOLEDole plc0.12%$17.9m1.30M−2.9% Reduced
MIDDMiddleby Corp0.12%$17.7m102.9K−2.9% Reduced
ESIElement Solutions Inc0.11%$17.5m366.9K0.0%
BALLBall Corporation0.11%$17.1m274.6K−2.9% Reduced
TVTXTravere Therapeutics, Inc.0.11%$17.0m300.0K+33.3% Added
WATWaters Corporation0.11%$16.9m45.0K−85.7% Reduced
FERGFerguson Enterprises0.11%$16.7m70.2K−1.0% Reduced
JBTMJBT Marel Corp0.11%$16.5m113.7K+7.3% Added
GWWW. W. Grainger0.10%$15.9m11.7K−20.3% Reduced
RYNRayonier Inc0.10%$15.9m747.0K−2.0% Reduced
ZTSZoetis0.10%$15.8m220.4K−83.2% Reduced
ATENA10 Networks, Inc.0.10%$15.3m410.0K−12.8% Reduced
WHWyndham Hotels & Resorts, Inc.0.10%$15.2m180.0K0.0%
ZBRAZebra Technologies0.10%$15.1m57.5KNew
VTRVentas0.10%$15.1m169.6K−9.4% Reduced
MKCMcCormick & Company0.10%$14.9m296.4K−23.9% Reduced
RIVNRivian Automotive, Inc. / DE0.10%$14.7m850.0K+30.8% Added
BNYBNY Mellon0.10%$14.7m101.8K+1.2% Added
UFPTUFP Technologies Inc0.10%$14.7m55.5K0.0%
CFRCullen/frost Bankers, Inc.0.10%$14.7m95.0K−80.7% Reduced
LYFTLyft, Inc.0.10%$14.6m1.00M0.0%
BJBj's Wholesale Club Holdings, Inc.0.09%$14.4m165.0K0.0%
CYTKCytokinetics Inc0.09%$14.1m165.0K+32.0% Added
BROSDutch Bros Inc.0.09%$14.0m195.0K+44.4% Added
CICigna0.09%$14.0m50.6K+92.1% Added
EQIXEquinix0.09%$13.9m13.3KNew
TECHBio-Techne0.09%$13.8m195.0K0.0%
PCGPG&E Corporation0.09%$13.7m815.6K+42.3% Added
TSMTaiwan Semiconductor Manufacturing Co LTD0.09%$13.5m28.2K−59.0% Reduced
EMREmerson Electric0.09%$13.3m92.8K−26.3% Reduced
AGCOAGCO Corp0.09%$13.3m110.9K−1.5% Reduced
ELVElevance Health0.09%$13.2m34.1K+12.8% Added
CompanyBought (value)Shares
KLACKLA Corporation$639.3m2.12M
SBSCompanhia DE Saneamento Basico DO Estado DE SAO Paulo-sabesp$263.5m45.58M
VLTOVeralto$160.6m1.81M
CTASCintas$154.7m909.7K
APHAmphenol$150.0m850.8K
BMIBadger Meter Inc$140.3m945.7K
DEDeere & Company$134.2m211.6K
AWKAmerican Water Works$100.8m766.4K
NEENextEra Energy$99.2m1.13M
PNFPPinnacle Financial Partners, Inc.$73.4m727.9K
CNMCore & Main, Inc.$65.2m1.35M
WABWabtec$64.8m240.4K
MSFTMicrosoft Corporation$60.3m161.8K
ACMAecom$52.0m745.7K
NXTNextpower Inc.$39.2m328.6K

Change in shares on the previous quarter's 13F, valued at this quarter's reported price.

CompanySold (value)Shares
MRVLMarvell Technology−$492.7m−1.65M
EBAYeBay Inc.−$248.5m−2.22M
LINLinde plc−$151.8m−292.4K
AAONAAON, Inc.−$138.7m−1.09M
VRTVertiv−$118.9m−355.0K
HUBBHubbell Incorporated−$102.5m−195.9K
WATWaters Corporation−$101.1m−269.6K
AOSA. O. Smith−$91.9m−1.46M
UNPUnion Pacific Corporation−$79.7m−292.9K
ZTSZoetis−$78.4m−1.09M
LFUSLittelfuse Inc−$67.6m−148.4K
CHEChemed Corp−$66.6m−176.4K
CDNSCadence Design Systems Inc−$62.6m−166.8K
CFRCullen/frost Bankers, Inc.−$61.5m−398.0K
DHRDanaher Corporation−$44.9m−235.7K

Change in shares on the previous quarter's 13F, valued at this quarter's reported price.

CompanyValue last quarterShares
CHEChemed Corp$66.6m176.4K
RVTYRevvity$5.5m62.8K
BIIBBiogen$5.3m28.7K
WGSGenedx Holdings Corp.$3.9m60.0K
PBHPrestige Consumer Healthcare Inc.$3.9m65.0K
VITLVital Farms, Inc.$3.4m238.9K
GISGeneral Mills$2.5m66.8K
WCCWesco International Inc$2.2m7.9K
FISFidelity National Information Services$1.7m35.5K
PODDInsulet Corporation$1.5m6.9K
  • Industrials37.8%
  • Technology29.6%
  • Materials7.0%
  • Financials6.7%
  • Health Care6.5%
  • Utilities6.4%
  • Consumer Discretionary3.9%
  • Consumer Staples0.9%
  • Real Estate0.7%
  • Communication Services0.6%

Share of the value held in companies we cover, by sector.

PeriodCopy, a yearS&P 500SharpeS&P 500Biggest dropBeta
Whole backtestNovember 16, 2018 to November 2, 2026+14.3%+15.3%0.620.71−33.2%1.03
Last three yearsNovember 3, 2023 to November 2, 2026+15.1%+21.8%0.731.16−20.1%0.88
Last yearNovember 7, 2025 to November 2, 2026+10.1%+14.2%0.540.84−9.0%0.74

From SEC Form 13F data sets. A 13F lists long positions in US-listed shares at the quarter's end, filed up to 45 days later; it does not show shorts, cash, bonds, non-US holdings or trades within the quarter. Positions in companies outside our coverage are not listed here. Research, not investment advice.