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Livermore
Livermore
ZHEN

Impax Asset Management Group plc

SEC CIK
0001749768
Latest filing
Aug 11, 2026

The latest 13F from Impax Asset Management Group plc covers Q2 2026 (filed Aug 11, 2026): 284 long positions worth $15.4B. The top 10 holdings make up 34.1% of the portfolio, and the largest is KLA Corp (KLAC) at 4.9%. Livermore has 26 filings on Form 13F from this institution, going back to Q1 2021.

What changed in Q2 2026

Share counts compared with Q1 2026: how many positions were new, added to, reduced or sold out, and the biggest buys and sells. Dollar amounts are estimated at the quarter-end prices implied by the filing.

Full comparison
New
9
Est. +$218.8M
Added
126
Est. +$1.63B
Reduced
111
Est. −$2.93B
Sold out
12
Est. −$173.0M

Top 5 holdings

Share of this quarter's portfolio value

  1. KLACKLA Corp
    4.9%$749.0MHistory
  2. NVDANVIDIA Corp
    4.8%$744.9MHistory
  3. LINLinde PLC
    4.8%$736.6MHistory
  4. XYLXylem Inc.
    3.4%$528.3MHistory
  5. MSFTMicrosoft Corp
    3.3%$503.8MHistory

Biggest buys

New and added positions, by estimated amount bought

  1. VLTOVeralto Corp
    +$160.6MAddedHistory
  2. CTASCintas Corp
    +$154.7MAddedHistory
  3. APHAmphenol Corp
    +$150.0MAddedHistory
  4. BMIBadger Meter Inc
    +$140.3MNewHistory
  5. DEDeere & Co
    +$134.2MAddedHistory

Largest weight increases

New and added positions, by percentage points of the portfolio gained

  1. APHAmphenol Corp
    +1.07 pp0.3% → 1.4%History
  2. BMIBadger Meter Inc
    +0.91 pp0.0% → 0.9%History
  3. VLTOVeralto Corp
    +0.91 pp2.1% → 3.0%History
  4. CTASCintas Corp
    +0.90 pp1.8% → 2.7%History
  5. DEDeere & Co
    +0.88 pp0.1% → 0.9%History

Biggest sells

Reduced and sold-out positions, by estimated amount sold

  1. MRVLMarvell Technology, Inc.
    −$492.7MReducedHistory
  2. KLACKLA Corp
    −$348.6MReducedConverted for a 10-for-1 splitHistory
  3. EBAYeBay Inc
    −$248.5MReducedHistory
  4. LINLinde PLC
    −$151.8MReducedHistory
  5. AAONAaon, Inc.
    −$138.7MReducedHistory

Largest weight decreases

Reduced and sold-out positions, by percentage points of the portfolio lost

  1. EBAYeBay Inc
    −1.37 pp1.7% → 0.4%History
  2. LINLinde PLC
    −1.12 pp5.9% → 4.8%History
  3. ZTSZoetis Inc.
    −0.98 pp1.1% → 0.1%History
  4. AOSSmith A O Corp
    −0.82 pp2.0% → 1.1%History
  5. HUBBHubbell Inc
    −0.68 pp2.3% → 1.7%History

Metrics

13F metrics for Q2 2026, computed only from the numbers in the filings. Definitions below.

Portfolio value
$15.4B
+$1.02B (+7.1%) vs. prior quarter
Positions
284
−3 vs. prior quarter
Top 10 concentration
34.1%
Top 10 as share of value
Turnover
12.4%
Q2 2026, one quarter
Average holding period
16.3 quarters
Weighted by value

How these are calculated

  • Portfolio value: the market value of all long positions in the 13F, as reported at quarter end, excluding options.
  • Top 10 concentration: the combined value of the 10 largest positions as a share of portfolio value.
  • Turnover: the smaller of this quarter's estimated purchases and estimated sales, divided by the average of this and last quarter's portfolio value. Estimates multiply the change in shares by the quarter-end price implied by the filing (market value divided by shares); new positions use this quarter's value and sold-out positions last quarter's. Only positions reported in shares count, and it is not calculated when the previous quarter was not filed.
  • Average holding period: how many consecutive quarters each current position has been held (including this one; a quarter without the position or without a filing starts the count over), weighted by this quarter's value. Counting starts with the first 13F in Livermore (Q1 2021), so positions held before then are understated.

13F filings by quarter

22 quarters, going back to Q1 2021. Bars show each quarter's 13F portfolio value; quarters without a filing are left blank.

Peak $27.3B (Q4 2021)

Q1 2021: $19.5BQ2 2021: $22.7BQ3 2021: $24.3BQ4 2021: $27.3BQ1 2022: $24.2BQ2 2022: $20.5BQ3 2022: $19.5BQ4 2022: $22.4BQ1 2023: $23.9BQ2 2023: $24.9BQ3 2023: $22.4BQ4 2023: $24.9BQ1 2024: $26.1BQ2 2024: $24.6BQ3 2024: $25.4BQ4 2024: $22.1BQ1 2025: $16.6BQ2 2025: $17.4BQ3 2025: $17.1BQ4 2025: $16.0BQ1 2026: $14.3BQ2 2026: $15.4B
Q1 2021Q2 2026
13F filings of Impax Asset Management Group plc by quarter
QuarterFiledPositionsValueTop 3 holdingsChangesFiling
Q2 2026Aug 11, 2026284$15.4BKLACNVDALINvs. Q1 2026SEC
Q1 2026May 12, 2026287$14.3BLINNVDAXYLvs. Q4 2025SEC
Q4 2025Jan 29, 2026279$16.0BLINMSFTXYLvs. Q3 2025SEC
Q3 2025Nov 6, 2025275$17.1BLINMSFTXYLvs. Q2 2025SEC
Q2 2025Aug 8, 2025280$17.4BLINMSFTXYLvs. Q1 2025SEC
Q1 2025Apr 29, 2025295$16.6BLINMSFTXYLvs. Q4 2024SEC
Q4 2024Feb 4, 2025312$22.1BMSFTLINNVDAvs. Q3 2024SEC
Q3 2024Nov 6, 2024Amended313$25.4BMSFTLINAWKvs. Q2 2024SEC
Q2 2024Nov 8, 2024Amended315$24.6BMSFTLINAWKvs. Q1 2024SEC
Q1 2024Apr 30, 2024308$26.1BMSFTLINAWKvs. Q4 2023SEC
Q4 2023Jan 26, 2024366$24.9BLINMSFTAWKvs. Q3 2023SEC
Q3 2023Nov 7, 2023Amended395$22.4BLINMSFTAWKvs. Q2 2023SEC
Q2 2023Aug 7, 2023388$24.9BLINMSFTAWKvs. Q1 2023SEC
Q1 2023May 10, 2023391$23.9BLINMSFTAWKvs. Q4 2022SEC
Q4 2022Feb 9, 2023381$22.4BLINMSFTAWKvs. Q3 2022SEC
Q3 2022Nov 8, 2022387$19.5BLINMSFTAWKvs. Q2 2022SEC
Q2 2022Aug 11, 2022Amended389$20.5BLINAWKMSFTvs. Q1 2022SEC
Q1 2022May 16, 2022411$24.2BLINAWKMSFTvs. Q4 2021SEC
Q4 2021Feb 14, 2022419$27.3BAWKLINMSFTvs. Q3 2021SEC
Q3 2021Nov 12, 2021396$24.3BAWKLINMSFTvs. Q2 2021SEC
Q2 2021Aug 5, 2021404$22.7BAWKLINXYLvs. Q1 2021SEC
Q1 2021May 14, 2021401$19.5BAWKLINXYL–SEC

13D and 13G filings

Companies where Impax Asset Management Group plc reports owning 5% or more on Schedule 13D or 13G, and its latest filings.

Current stakes of 5% or more

1 company, largest stake first.

Companies where Impax Asset Management Group plc owns 5% or more
CompanyLatest formStakeChangeFirst filedLatest filingFiling
HCATHealth Catalyst, Inc.13G5.40%4.00M sharesNewJul 21, 20261 filingJul 21, 2026SEC

Latest filings

33 filings on file made by Impax Asset Management Group plc or listing it as a reporting person; the latest 20 are shown.

Schedule 13D and 13G filings by Impax Asset Management Group plc
CompanyFiled (ET)FormStakeChangeEvent dateFiling
HCATHealth Catalyst, Inc.Jul 21, 202611:06 AM ET13G5.40%4.00M sharesNewJun 30, 2026SEC
ZWSZurn Elkay Water Solutions CorpFeb 5, 20259:32 AM ET13G/A2.20%3.73M shares–Below 5%Dec 31, 2024SEC
WTSWatts Water Technologies IncFeb 5, 20259:29 AM ET13G/A4.00%1.09M shares–Below 5%Dec 31, 2024SEC
MWAMueller Water Products, Inc.Oct 15, 202411:50 AM ET13G/A3.70%5.74M shares–Below 5%Sep 30, 2024SEC
PNRPENTAIR plcJan 18, 202413GOld format–––SEC
WTSWatts Water Technologies IncJan 18, 202413GOld format–––SEC
PNRPENTAIR plcJan 18, 202413GOld format–––SEC
ZWSZurn Elkay Water Solutions CorpJan 18, 202413GOld format–––SEC
MWAMueller Water Products, Inc.Jan 18, 202413GOld format–––SEC
ITRIItron, Inc.Feb 13, 202313GOld format–––SEC
ZWSZurn Elkay Water Solutions CorpFeb 13, 202313GOld format–New–SEC
WTSWatts Water Technologies IncFeb 13, 202313GOld format–––SEC
PNRPENTAIR plcFeb 13, 202313GOld format–––SEC
MWAMueller Water Products, Inc.Feb 13, 202313GOld format–––SEC
WTSWatts Water Technologies IncFeb 14, 202213GOld format–––SEC
VCTRVictory Capital Holdings, Inc.Feb 14, 202213GOld format–––SEC
RYNRayonier IncFeb 14, 202213GOld format–––SEC
PNRPENTAIR plcFeb 14, 202213GOld format–New–SEC
MWAMueller Water Products, Inc.Feb 14, 202213GOld format–––SEC
ITRIItron, Inc.Feb 14, 202213GOld format–––SEC