AdvisorCensus / Financial advisors / Impax Asset Management
Impax Asset Management
Filed as IMPAX ASSET MANAGEMENT · Legal name Impax Asset Management (Aifm) Ltd.
Impax Asset Management is an SEC-registered investment advisory firm in London, United Kingdom, registered since 2014, reporting $1 billion to $5 billion in regulatory assets under management in its Form ADV filing dated July 30, 2026.
Quick answers
From the filingHow is Impax Asset Management compensated?
On its Form ADV (Item 5.E, October 2026), Impax Asset Management reports these compensation arrangements: a percentage of assets under its management; performance-based fees. The amounts are in Item 5 of its Form ADV Part 2A brochure.
Where is Impax Asset Management located?
Impax Asset Management's principal office is in London, United Kingdom, according to its Form ADV.
Is Impax Asset Management registered with the SEC or a state?
Impax Asset Management is an SEC-registered investment advisory firm, registered since 2014. Status as filed: Approved. CRD 171783.
How much does Impax Asset Management manage?
Impax Asset Management reports $2,004,114,756 in regulatory assets under management in its Form ADV filing dated July 30, 2026 (100% discretionary).
How have Impax Asset Management's assets and staff changed since 2021?
In the Form ADV data for Impax Asset Management: Regulatory assets under management: $1,924,661,598 in the October 2021 data and $2,004,114,756 in the October 2026 data, up 4%. Total employees: 119 in October 2021 and 165 in October 2026. Assets under management move with markets as well as with clients coming and going.
What types of clients does Impax Asset Management serve?
By number of clients on Form ADV Item 5.D: pooled investment vehicles (other than investment companies and business development companies) (4).
Does Impax Asset Management report any disciplinary disclosures?
Reports no disclosure items on Form ADV Item 11. The detail of any item is on the firm's SEC record: https://adviserinfo.sec.gov/firm/summary/171783
What changed in Impax Asset Management's recent Form ADV filings?
In the January 2026 filing data: Employees performing advisory functions went from 58 to 53. Regulatory assets under management went from $2,432,121,683 to $2,004,114,756 (-18%). Updated its list of owners and control persons (Schedule A).
From the Form ADV filing
Every figure below is as the firm filed it with regulators, as of October 2026.
How the firm is compensated
Item 5.E- A percentage of assets under your management
- Performance-based fees
Item 5.E lists how the firm is compensated for its advice; Items 5.B, 6.A, and 7.A show whether its people or related companies can also earn commissions. Percentage of assets, fixed, hourly, subscription, and performance-based fees come from clients (a performance-based fee depends on investment results); commissions come with a sale or a trade, often from the company behind the product. How fees, commissions, and other arrangements differ
Fees and minimums
Form ADV Part 2ASee the firm's brochure (dated December 22, 2025) for its fees and any account minimum, on the SEC's IAPD site.
Regulatory assets under management
Item 5.F$2,004,114,756 as of October 2026, filing dated July 30, 2026.
A measure of scale, not skill or returns. Discretionary means the firm decides trades; non-discretionary means clients approve each one. What assets under management means
Who the firm serves
Item 5.DA firm with no individual clients is an institutional manager even if it manages billions; the mix tells you whom the practice is built around.
Advisory services
Item 5.G- Portfolio management for pooled investment vehicles (other than investment companies)
Registration and firm details
Items 1, 2, 5- Legal name
- Impax Asset Management (Aifm) Ltd.
- Registration
- SEC-registered investment adviser. Status as filed: Approved.
- Registered since
- 2014 (12 years)
- Employees
- Total: 165. Performing investment advisory functions: 53.
- Wrap fee program participation
- No.
- States registered or notice-filed
- Not reported.
SEC-registered investment advisers are examined by the SEC. SEC, state, and exempt registration
Disclosures
Item 11None Reports no disclosure items on Form ADV Item 11. View on IAPD.
Item 11 asks about criminal, regulatory, and civil events involving the firm and its advisory personnel. The detail of each yes answer is on the IAPD record. Reading a firm's disclosures
Assets and staff over time
Items 5.A, 5.F| Data period | Assets under management | Employees | Filing dated |
|---|---|---|---|
| October 2026 | $2,004,114,756 | 165 | July 30, 2026 |
| October 2025 | $2,432,121,683 | 187 | December 23, 2024 |
| October 2024 | $2,529,151,247 | 175 | December 19, 2023 |
| October 2023 | $2,374,074,027 | 155 | January 18, 2023 |
| October 2022 | $3,088,965,126 | 133 | April 12, 2022 |
| October 2021 | $1,924,661,598 | 119 | March 12, 2021 |
Regulatory assets under management: $1,924,661,598 in the October 2021 data and $2,004,114,756 in the October 2026 data, up 4%.
Total employees: 119 in October 2021 and 165 in October 2026.
As filed in each year's data for the same month. Assets under management move with markets as well as with clients coming and going; they measure scale, not skill or returns. Most firms update these figures once a year.
Changes in the filing
Last 12 months- January 2026
- Employees performing advisory functions went from 58 to 53.
- Regulatory assets under management went from $2,432,121,683 to $2,004,114,756 (-18%).
- Updated its list of owners and control persons (Schedule A).
Compared month to month from the SEC's monthly adviser data and the state compilation feed. Owners and control persons are summarized, never named.
Websites listed on Form ADV
Item 1.ISource: Form ADV, as of October 2026. Values appear as filed; a value the firm did not report is shown as "Not reported."
Cite this page
AdvisorCensus. Impax Asset Management (CRD 171783): Form ADV filing data as of October 2026. https://advisorcensus.com/firm/impax-asset-management-london-171783