IPX on London Stock Exchange

Impax Asset Management Group

Specialist asset manager based in London, England

Impax Asset Management Group plc is a specialist asset manager based in London, England.³ Its shares trade on London Stock Exchange under the symbol IPX.¹ Wikipedia text CC BY-SA 4.0

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Last updated Oct 21, 2026.

Overview

1998Founded¹

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TickerIPX on London Stock Exchange¹
HeadquartersLondon¹
Websitewww.impaxam.com
Legal formpublic company¹
LEI213800AJDNW4S2B7E680⁴
StatusActive⁴
LEI statusIssued and current⁴
Registered address7TH FLOOR, SW1Y 4AJ London, United Kingdom⁴
Registered withCompanies House, 03262305⁴

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Impax Asset Management Group plc is a specialist asset manager based in London, England.³

Corporate structure

Impax Asset Management Group sits at the top of its group. 44 entities, 3 countries on record. Switch between the flow chart and the network, and select any entity to see its details.

Impax Asset Management Group London, United Kingdom
- IMPAX ASSET MANAGEMENT (AIFM) LIMITED London, United Kingdom
  - Global Resource Optimization Fund, L.P. Fund · London, Delaware, United Kingdom
  - IMPAX GLOBAL OPPORTUNITIES FUND, L.P. Fund · London, Delaware, United Kingdom
- IMPAX ASSET MANAGEMENT IRELAND LIMITED Dublin, Ireland
  - Impax Asian Environmental Markets (Ireland) Fund Fund · Dublin, Ireland
  - Impax Environmental Markets (Ireland) Fund Fund · Dublin, Ireland
- IMPAX ASSET MANAGEMENT LIMITED London, United Kingdom
  - Impax Asia Opportunities Strategy Fund · London, United Kingdom
- IMPAX ASSET MANAGEMENT LLC Portsmouth, New Hampshire, United States
  - GLOBAL SHORT MATURITY RESPONSIBLE HIGH YIELD FUND Fund · Portsmouth, New Hampshire, United States
  - IMPAX ASSET MANAGEMENT COLLECTIVE INVESTMENT TRUST Fund · Portsmouth, New Hampshire, United States
  - IMPAX CORE BOND FUND Fund · Portsmouth, New Hampshire, United States
  - Impax EAFE Opportunities Strategy Fund · Portsmouth, New Hampshire, United States
  - IMPAX FUNDS (LUXEMBOURG) Fund · Portsmouth, New Hampshire, United States
    - U.S. SHORT DURATION RESPONSIBLE HIGH YIELD FUND Fund · Greenwich, Connecticut, United States
  - Impax Funds Series Trust I Fund · Portsmouth, New Hampshire, United States
  - IMPAX FUNDS SERIES TRUST III Fund · Portsmouth, New Hampshire, United States
  - IMPAX GLOBAL ENVIRONMENTAL MARKETS FUND Fund · Portsmouth, New Hampshire, United States
  - Impax Global Opportunities Collective Investment Trust Fund Fund · Portsmouth, New Hampshire, United States
  - IMPAX GLOBAL OPPORTUNITIES FUND Fund · Portsmouth, New Hampshire, United States
  - Impax Global Social Leaders Fund Fund · Portsmouth, New Hampshire, United States
  - Impax Global Sustainable Infrastructure ETF Fund · Wilmington, Delaware, United States
  - Impax Global Sustainable Infrastructure Fund Fund · Portsmouth, New Hampshire, United States
  - IMPAX GLOBAL WOMEN'S LEADERSHIP FUND Fund · Portsmouth, New Hampshire, United States
  - IMPAX HIGH YIELD BOND FUND Fund · Portsmouth, New Hampshire, United States
  - Impax International Sustainable Economy Fund Fund · Portsmouth, New Hampshire, United States
  - IMPAX LARGE CAP COLLECTIVE INVESTMENT TRUST FUND Fund · Portsmouth, New Hampshire, United States
  - IMPAX LARGE CAP FUND Fund · Portsmouth, New Hampshire, United States
  - IMPAX SMALL CAP FUND Fund · Portsmouth, New Hampshire, United States
  - Impax Sustainable Allocation Fund Fund · Portsmouth, New Hampshire, United States
  - Impax US Sustainable Economy Fund Fund · Portsmouth, New Hampshire, United States
- BADGER METER INC Stake · Milwaukee, Wisconsin, United States
- FRANKLIN ELECTRIC CO INC Stake · Fort Wayne, Indiana
- Health Catalyst, Inc. Stake · South Jordan, Utah, United States
- HomeTrust Bancshares Stake · Asheville
- Itron Stake · Liberty Lake, Washington, United States
- Mueller Water Products Stake · Atlanta, Georgia, United States
- Pentair Stake · Manchester, Minnesota, United Kingdom
- Rayonier Stake · Wildlight, Florida
- Victory Capital Stake · Eau Claire, Wisconsin, United States
- WATTS WATER TECHNOLOGIES INC Stake · Wilmington, Delaware, United States
- Zurn Elkay Water Solutions Corp Stake · Milwaukee, Wisconsin
- Impax Asset Management, Ltd. Subsidiary

Built from parent and subsidiary links from GLEIF, the Global Legal Entity Identifier Foundation (CC0); stakes of 5% or more it reported on Schedules 13D and 13G (11 companies); owners and owned firms from Form ADV, the registration investment advisers file with the SEC. Each entity in the chart links to its source.

The story

The business was founded in 1998 to invest in companies whose work might reduce resource scarcity, with support from the International Finance Corporation. Various commentators have referred to the company's focus on environmental matters.

On 18 September 2017, the group plc announced that it had entered into agreements to acquire 100% of Pax World Management LLC. The acquisition was completed on 18 January 2018. In December 2018, the company announced that it would be opening an operation in Dublin to serve clients after Brexit (the withdrawal of the United Kingdom from the European Union).

After 23.7% of shareholders voted against the re-appointment of EY as the company's auditor in May 2018, the company was criticised by the Investment Association, over an apparent lack of independence of EY as its auditor, in December 2018.

From Wikipedia’s article on Impax Asset Management Group, shared under CC BY-SA 4.0.⁵

Subsidiaries and ownership

Subsidiaries (GLEIF)

Ownership links from GLEIF, the Global Legal Entity Identifier Foundation (CC0); each one cites its LEI record.

Timeline

1998Founded Founded¹

Filings

24 filings to the SEC since October 2021: 24 other. The latest 20:

The 24 filings since October 2021 can be filtered by form type and year here when JavaScript is on.

Every filing from the last five years, summarized. The full record is on SEC EDGAR.

Stakes it holds

Impax Asset Management Group has told the SEC it owns more than 5% of 11 companies, latest first (Schedules 13D and 13G).

Health Catalyst, Inc.SCHEDULE 13G Jul 21, 2026¹⁰
WATTS WATER TECHNOLOGIES INCSCHEDULE 13G/A Feb 14, 2022 to Feb 5, 2025¹¹
Zurn Elkay Water Solutions CorpSCHEDULE 13G/A Feb 13, 2023 to Feb 5, 2025¹²
Mueller Water ProductsSCHEDULE 13G/A Feb 14, 2022 to Oct 15, 2024¹³
PentairSC 13G Feb 14, 2022 to Jan 18, 2024¹⁴
ItronSC 13G Feb 14, 2022 to Feb 13, 2023¹⁵
BADGER METER INCSC 13G Feb 14, 2022¹⁶
FRANKLIN ELECTRIC CO INCSC 13G Feb 14, 2022¹⁷
HomeTrust BancsharesSC 13G Feb 14, 2022¹⁸
RayonierSC 13G Feb 14, 2022¹⁹
Victory CapitalSC 13G Feb 14, 2022²⁰

SEC filer profile

How Impax Asset Management Group is registered with the Securities and Exchange Commission, from its EDGAR record and the cover page of its latest annual report.

Name on EDGARImpax Asset Management Group plc²
CIK0001749768
Incorporated inUnited Kingdom²
Fiscal year endsSeptember 30²
Business address7Th Floor, 30 Panton Street, London, X0 SW1Y 4AJ²
Phone00442039123000²
On EDGAR sinceNov 14, 2018²
Filings82 in all: SC 13G (42), 13F-HR (32), 13F-HR/A (4), SCHEDULE 13G/A (3), SCHEDULE 13G (1)²

Sources

The numbers on this page point here. Each one links to the record it came from.

1
WikidataImpax Asset Management Group on Wikidata
2
SEC EDGARImpax Asset Management Group filings on SEC EDGAR
3
WikipediaImpax Asset Management Group on Wikipedia
4
GLEIFImpax Asset Management Group LEI record (213800AJDNW4S2B7E680)
5
WikipediaImpax Asset Management Group on Wikipedia (revision used)
6
GLEIFIMPAX ASSET MANAGEMENT (AIFM) LIMITED: LEI record
7
GLEIFIMPAX ASSET MANAGEMENT IRELAND LIMITED: LEI record
8
GLEIFIMPAX ASSET MANAGEMENT LIMITED: LEI record
9
GLEIFIMPAX ASSET MANAGEMENT LLC: LEI record
10
SEC EDGARImpax Asset Management Group SCHEDULE 13G on Health Catalyst, Inc.
11
SEC EDGARImpax Asset Management Group SCHEDULE 13G/A on WATTS WATER TECHNOLOGIES INC
12
SEC EDGARImpax Asset Management Group SCHEDULE 13G/A on Zurn Elkay Water Solutions Corp
13
SEC EDGARImpax Asset Management Group SCHEDULE 13G/A on Mueller Water Products
14
SEC EDGARImpax Asset Management Group SC 13G on Pentair
15
SEC EDGARImpax Asset Management Group SC 13G on Itron
16
SEC EDGARImpax Asset Management Group SC 13G on BADGER METER INC
17
SEC EDGARImpax Asset Management Group SC 13G on FRANKLIN ELECTRIC CO INC
18
SEC EDGARImpax Asset Management Group SC 13G on HomeTrust Bancshares
19
SEC EDGARImpax Asset Management Group SC 13G on Rayonier
20
SEC EDGARImpax Asset Management Group SC 13G on Victory Capital