# 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.

- CRD: 109962
- Filed as: ESSEX INVESTMENT MANAGEMENT COMPANY, LLC
- Registration: SEC-registered investment adviser (status as filed: Approved)
- Location: Boston, MA
- Filing period: October 2026
- Form ADV filing dated: March 30, 2026
- SEC record (IAPD): https://adviserinfo.sec.gov/firm/summary/109962
- AdvisorCensus page: https://advisorcensus.com/firm/essex-investment-management-company-llc-boston-ma-109962

## Quick answers

**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. The amounts are in Item 5 of its Form ADV Part 2A brochure.

**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

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

### Custodians (Schedule D, Section 5.K(3))
- BNY Mellon Capital Markets, LLC
- FNZ Trust Company
- J.P. Morgan Securities Inc.
- State Street Bank and Trust

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.

### Regulatory assets under management (Item 5.F)
- Total: $712,676,443
- Discretionary: $712,676,443
- Non-discretionary: $0

### Clients (Item 5.D)

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

### 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

### Firm details
- Registered since: 1998 (28 years)
- Employees: 13 total, 9 performing advisory functions
- Wrap fee program participation: No
- States registered or notice-filed: CA, FL, IL, LA, MA, NH, NY, OH, RI, TX
- Disclosures (Item 11): Reports no disclosure items on Form ADV Item 11.

### Other offices (Schedule D, Section 1.F), as of the April 2026 filing
- Evanston, IL

### Websites listed on Form ADV (Item 1.I)
- [essexinvest.com](https://essexinvest.com)
- LinkedIn @ESSEX-INVESTMENT-MANAGEMENT
- X @ESSEXINVEST

## Assets and staff over time

| Data period | Regulatory assets under management | Employees | Filing dated |
| --- | --- | --- | --- |
| October 2021 | $799,426,613 | 14 | March 31, 2021 |
| October 2022 | $845,341,141 | 15 | March 31, 2022 |
| October 2023 | $627,059,695 | 15 | March 31, 2023 |
| October 2024 | $627,115,345 | 12 | April 24, 2024 |
| October 2025 | $610,160,466 | 12 | March 28, 2025 |
| October 2026 | $712,676,443 | 13 | March 30, 2026 |

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.

## Changes in the filing (last 12 months)

### 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.

### December 2025
- Registered or notice-filed in LA.

## Source

Form ADV as filed, October 2026. Values appear as filed. Cite as: AdvisorCensus. Essex Investment Management Company, LLC (CRD 109962): Form ADV filing data as of October 2026.