Data / Investment advisers / Impax Asset Management, LTD.
Impax Asset Management, LTD., London, United Kingdom: $25.8 billion AUM, SEC registered investment adviser
Updated November 7, 2026. Source: the SEC's Form ADV data files for investment advisers.
Impax Asset Management, LTD. is an SEC registered investment adviser with its main office in London, United Kingdom and reports $25.8 billion in regulatory assets under management in its Form ADV filed October 26, 2026. Its clients include pooled investment vehicles, investment companies and other investment advisers. It is paid through a percentage of assets under management and performance based fees.
The request: Watch Impax Asset Management, LTD. (CRD number 143247): each new Form ADV amendment, with AUM, clients and private funds. $10 of work on sign-up, no card.
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- Registration
- SEC registered investment adviser
- CRD number
- 143247
- SEC file number
- 801-67631
- SEC status
- Approved, effective January 7, 2008
- Main office
- 7th Floor 30 Panton Street, London, United Kingdom SW1Y 4AJ
- Phone
- 011 44 20 3912 3000
- Website
- impaxam.com
- Regulatory AUM
- $25,841,080,997 in the Form ADV filed October 26, 2026
- Discretionary AUM
- $24,448,570,709
- Non discretionary AUM
- $1,392,510,288
- Accounts
- 686
- Employees
- 165, of which 53 give investment advice
- Form of organization
- United Kingdom Limited Liability Company (LTD)
- Paid through
- a percentage of assets under management, performance based fees
- Form ADV Item 11 disclosures
- None reported
- Latest Form ADV filing
- October 26, 2026
- SEC record
- Investment Adviser Public Disclosure
Clients
Client types the adviser reports in Form ADV item 5.D, with the AUM it attributes to each.
| Client type | Clients | AUM |
|---|---|---|
| Pooled investment vehicles | 27 | $18.02 billion |
| Investment companies | 4 | $2.25 billion |
| Other investment advisers | 11 | $1.57 billion |
| State or municipal government entities | 3 | $1.47 billion |
| Pension and profit sharing plans | 9 | $893.8 million |
| High net worth individuals | 562 | $218.5 million |
| Corporations or other businesses | 17 | $14.3 million |
| Charitable organizations | 7 | $12.8 million |
| Individuals (other than high net worth individuals) | 33 | $7.1 million |
AUM in the SEC's monthly files
Each change in the AUM the adviser reported across the monthly SEC files held here, with the first file that shows the new value.
| First in the file of | AUM | Form ADV filed |
|---|---|---|
| January 2, 2026 | $25.84 billion | December 22, 2025 |
| December 1, 2025 | $40.55 billion | December 20, 2024 |
Also on SpecStream
- Advisers with $10 billion to $100 billion in AUM
- Advisers serving pooled investment vehicles
- Advisers serving investment companies
- Impax Asset Management, LTD. on the SEC's adviser search
Public data published by the US Securities and Exchange Commission (US government work). Advisers report these values themselves in Form ADV, and neither the SEC nor the states approve or guarantee them. AUM is regulatory assets under management as the adviser reported it in Form ADV item 5.F, which can differ from the AUM a firm quotes elsewhere. Exempt reporting advisers do not report AUM. Office address, phone and website are the adviser's main office as filed; a firm that files its main office as a private residence shows no street address or phone. An Item 11 disclosure is a reported event, not a finding about the firm today. Details for each firm are on the SEC's Investment Adviser Public Disclosure site. This page uses SEC data and is not endorsed or certified by the SEC. Free to reuse with credit to SpecStream under CC BY 4.0. Spot a wrong value? Write to [email protected] with the link to this page.