Impax Asset Management LLC

• A percentage of assets under your management

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

See the firm's brochure (dated December 22, 2025) for its fees and any account minimum, on the SEC's IAPD site.

$8,942,785,264 as of October 2026, filing dated September 29, 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

A firm with no individual clients is an institutional manager even if it manages billions; the mix tells you whom the practice is built around.

• Portfolio management for investment companies (and business development companies)
• Portfolio management for pooled investment vehicles (other than investment companies)
• Portfolio management for businesses (other than small businesses) or institutional clients

Registration

SEC-registered investment adviser. Status as filed: Approved.

Registered since

1972 (54 years)

Employees

Total: 93. Performing investment advisory functions: 30.

Wrap fee program participation

No.

Custodians (Schedule D, Section 5.K(3))

BNY MellonCaceis BankState Street Bank

Custodians holding 10% or more of the firm's separately managed account assets, as filed on Form ADV (Schedule D, Section 5.K(3)). A custodian holds client assets; it does not endorse or supervise the firm. AdvisorCensus has no relationship with any custodian.

Other offices (Schedule D, Section 1.F)

1 other office, as of the October 2026 filing

New York, NY

States registered or notice-filed

10 states or jurisdictions

CACOCTFLILMAMDMENHNY

SEC-registered investment advisers are examined by the SEC. SEC, state, and exempt registration

None 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

Regulatory assets under management: $5,332,933,707 in the October 2021 data and $8,942,785,264 in the October 2026 data, up 68%.

Total employees: 62 in October 2021 and 93 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.

1. January 2026
   • Employees performing advisory functions went from 36 to 30.
   • Registered or notice-filed in CA, CO, CT, FL, IL, MA, MD, ME, NY.
   • 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.