# Impax Asset Management

> 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.

- CRD: 171783
- Filed as: IMPAX ASSET MANAGEMENT
- Legal name: Impax Asset Management (Aifm) Ltd.
- Registration: SEC-registered investment adviser (status as filed: Approved)
- Location: London, United Kingdom
- Filing period: October 2026
- Form ADV filing dated: July 30, 2026
- SEC record (IAPD): https://adviserinfo.sec.gov/firm/summary/171783
- AdvisorCensus page: https://advisorcensus.com/firm/impax-asset-management-london-171783

## Quick answers

**How 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

### Compensation (Item 5.E)
- A percentage of assets under your management
- Performance-based fees

### Regulatory assets under management (Item 5.F)
- Total: $2,004,114,756
- Discretionary: $2,004,114,756
- Non-discretionary: $0

### Clients (Item 5.D)

| Client type | Clients | Assets |
| --- | --- | --- |
| Pooled investment vehicles (other than investment companies and business development companies) | 4 | $2,004,114,756 |

### Advisory services (Item 5.G)
- Portfolio management for pooled investment vehicles (other than investment companies)

### Firm details
- Registered since: 2014 (12 years)
- Employees: 165 total, 53 performing advisory functions
- Wrap fee program participation: No
- Disclosures (Item 11): Reports no disclosure items on Form ADV Item 11.

### Websites listed on Form ADV (Item 1.I)
- impaxam.com
- impaxenvironmentalmarkets.co.uk
- LinkedIn @IMPAX-ASSET-MANAGEMENT
- LinkedIn @IMPAX-ENVIRONMENTAL-MARKETS-PLC
- X @IEMPLC
- X @IMPAXAM

## Assets and staff over time

| Data period | Regulatory assets under management | Employees | Filing dated |
| --- | --- | --- | --- |
| October 2021 | $1,924,661,598 | 119 | March 12, 2021 |
| October 2022 | $3,088,965,126 | 133 | April 12, 2022 |
| October 2023 | $2,374,074,027 | 155 | January 18, 2023 |
| October 2024 | $2,529,151,247 | 175 | December 19, 2023 |
| October 2025 | $2,432,121,683 | 187 | December 23, 2024 |
| October 2026 | $2,004,114,756 | 165 | July 30, 2026 |

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.

## 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).

## Source

Form ADV as filed, October 2026. Values appear as filed. Cite as: AdvisorCensus. Impax Asset Management (CRD 171783): Form ADV filing data as of October 2026.