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AdvisorCensus / Financial advisors / Massachusetts / Boston / Essex Investment Management Company, LLC

Essex Investment Management Company, LLC

Boston, MASEC-registered investment adviserCRD 109962

Filed as ESSEX INVESTMENT MANAGEMENT COMPANY, LLC

Essex Investment Management Company, LLC is an SEC-registered investment advisory firm in Boston, MA, registered since 1998, reporting $500 million to $1 billion in regulatory assets under management in its Form ADV filing dated March 30, 2026.

28 years
registered since 1998
$712,676,443
assets under management
1 arrangement
Percentage of assets
None
disclosure items (Item 11)

Quick answers

From the filing

How is Essex Investment Management Company, LLC compensated?

On its Form ADV (Item 5.E, October 2026), Essex Investment Management Company, LLC reports these compensation arrangements: a percentage of assets under its management.

Where is Essex Investment Management Company, LLC located?

Essex Investment Management Company, LLC's principal office is in Boston, MA, according to its Form ADV; the April 2026 filing also lists 1 other office (Schedule D, Section 1.F).

Is Essex Investment Management Company, LLC registered with the SEC or a state?

Essex Investment Management Company, LLC is an SEC-registered investment advisory firm, registered since 1998. Status as filed: Approved. CRD 109962.

How much does Essex Investment Management Company, LLC manage?

Essex Investment Management Company, LLC reports $712,676,443 in regulatory assets under management in its Form ADV filing dated March 30, 2026 (100% discretionary).

How have Essex Investment Management Company, LLC's assets and staff changed since 2021?

In the Form ADV data for Essex Investment Management Company, LLC: Regulatory assets under management: $799,426,613 in the October 2021 data and $712,676,443 in the October 2026 data, down 11%. Total employees: 14 in October 2021 and 13 in October 2026. Assets under management move with markets as well as with clients coming and going.

What types of clients does Essex Investment Management Company, LLC serve?

By number of clients on Form ADV Item 5.D: high net worth individuals (55); individuals (other than high net worth individuals) (35); charitable organizations (14).

Which custodians does Essex Investment Management Company, LLC use?

Essex Investment Management Company, LLC's most recent Form ADV filing (Schedule D, Section 5.K(3)) lists BNY Mellon Capital Markets, LLC, FNZ Trust Company, J.P. Morgan Securities Inc. and State Street Bank and Trust as custodians holding 10% or more of its separately managed account assets.

Does Essex Investment Management Company, LLC 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/109962

What changed in Essex Investment Management Company, LLC's recent Form ADV filings?

In the April 2026 filing data: Employees performing advisory functions went from 8 to 9. Regulatory assets under management went from $610,160,466 to $712,676,443 (+17%). Changed its office addresses in Evanston, IL.

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

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 2A

The brochure lists different fees for different services or strategies. See the firm's brochure (dated March 30, 2026) for its fees and any account minimum, on the SEC's IAPD site.

Regulatory assets under management

Item 5.F
$712,676,443

$712,676,443 as of October 2026, filing dated March 30, 2026.

Discretionary: $712,676,443.Non-discretionary: $0.

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.D
Individuals (other than high net worth individuals)
Clients 35 Assets $78,404,767 (11%)
High net worth individuals
Clients 55 Assets $130,392,300 (18%)
Investment companies
Clients 2 Assets $122,987,038 (17%)
Pooled investment vehicles (other than investment companies and business development companies)
Clients 2 Assets $68,777,482 (10%)
Pension and profit sharing plans (but not the plan participants or government pension plans)
Clients 1 Assets $6,168,133 (1%)
Charitable organizations
Clients 14 Assets $79,091,587 (11%)
State or municipal government entities (including government pension plans)
Clients 8 Assets $226,855,136 (32%)

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.

Advisory services

Item 5.G
  • Portfolio management for individuals and/or small businesses
  • 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 and firm details

Items 1, 2, 5
Registration
SEC-registered investment adviser. Status as filed: Approved.
Registered since
1998 (28 years)
Employees
Total: 13. Performing investment advisory functions: 9.
Wrap fee program participation
No.
Custodians (Schedule D, Section 5.K(3))

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 April 2026 filing
Evanston, IL
States registered or notice-filed
10 states or jurisdictions
CAFLILLAMANHNYOHRITX

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

Disclosures

Item 11

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

Assets and staff over time

Items 5.A, 5.F
$799M 2021 $845M 2022 $627M 2023 $627M 2024 $610M 2025 $713M 2026
Data periodAssets under managementEmployeesFiling dated
October 2026$712,676,44313March 30, 2026
October 2025$610,160,46612March 28, 2025
October 2024$627,115,34512April 24, 2024
October 2023$627,059,69515March 31, 2023
October 2022$845,341,14115March 31, 2022
October 2021$799,426,61314March 31, 2021

Regulatory assets under management: $799,426,613 in the October 2021 data and $712,676,443 in the October 2026 data, down 11%.

Total employees: 14 in October 2021 and 13 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
  1. April 2026
    • Employees performing advisory functions went from 8 to 9.
    • Regulatory assets under management went from $610,160,466 to $712,676,443 (+17%).
    • Changed its office addresses in Evanston, IL.
  2. December 2025
    • Registered or notice-filed in LA.

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.I
essexinvest.com

Source: 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. Essex Investment Management Company, LLC (CRD 109962): Form ADV filing data as of October 2026.
https://advisorcensus.com/firm/essex-investment-management-company-llc-boston-ma-109962