Essex Investment Management provides portfolio management for individuals and small businesses, portfolio management for investment companies, portfolio management for pooled vehicles, and portfolio management for institutions.
Essex Investment Management reports 117 clients. They include 55 high-net-worth individuals, 35 individual clients and 14 charitable organizations. Of its assets, 100.0% ($713M across 117 accounts) are managed with discretion.
| Client type | Clients | Assets |
|---|---|---|
| Individuals (other than HNW) | 30% | 11% |
| High-net-worth individuals | 47% | 18% |
| Investment companies | 2% | 17% |
| Pooled investment vehicles | 2% | 10% |
| Pension and profit-sharing plans | <1% | <1% |
| Other client typesCharitable organizations; State or municipal government entities | 19% | 43% |
Client breakdown and activity details
| Client type | Clients | Regulatory AUM | AUM share | Avg. per client |
|---|---|---|---|---|
| Individuals (other than HNW) | 35 | $78.4M | 11.0% | $2.24M |
| High-net-worth individuals | 55 | $130M | 18.3% | $2.37M |
| Investment companies | 2 | $123M | 17.3% | $61.5M |
| Pooled investment vehicles | 2 | $68.8M | 9.7% | $34.4M |
| Pension and profit-sharing plans | Fewer than 5 | $6.17M | 0.9% | $6.17M |
| Charitable organizations | 14 | $79.1M | 11.1% | $5.65M |
| State or municipal government entities | 8 | $227M | 31.8% | $28.4M |
| Total | 117 | $713M | 100% | — |
- Clients
- 35
- Regulatory AUM
- $78.4M
- AUM share
- 11.0%
- Avg. per client
- $2.24M
- Clients
- 55
- Regulatory AUM
- $130M
- AUM share
- 18.3%
- Avg. per client
- $2.37M
- Clients
- 2
- Regulatory AUM
- $123M
- AUM share
- 17.3%
- Avg. per client
- $61.5M
- Clients
- 2
- Regulatory AUM
- $68.8M
- AUM share
- 9.7%
- Avg. per client
- $34.4M
- Clients
- Fewer than 5
- Regulatory AUM
- $6.17M
- AUM share
- 0.9%
- Avg. per client
- $6.17M
- Clients
- 14
- Regulatory AUM
- $79.1M
- AUM share
- 11.1%
- Avg. per client
- $5.65M
- Clients
- 8
- Regulatory AUM
- $227M
- AUM share
- 31.8%
- Avg. per client
- $28.4M
Total
- Clients
- 117
- Regulatory AUM
- $713M
- AUM share
- 100%
- Avg. per client
- —
- Clients outside the U.S.
- 0%
- Clients advised without assets under management last fiscal year
- 0
- Private funds advised
- 0
Essex Investment Management is paid through a percentage of assets under management; its fees and minimums are set out in its brochures on the SEC website.
Joseph McNay owns 25% to 50% of Essex Investment Management. It has 13 employees, 9 of them in advisory roles.
Leadership
- Michael McCarthyCCO/COO/Managing Member
- Annemarie McMichaelResearch Analyst, Non-Managing Member
- Joseph McNayChairman & Managing Member
- Nancy PrialCo-CEO & Managing Member
- Saralyn SacksSenior Portfolio Manager & Non-Managing Member
- Robert UekCo-CEO & Managing Member
Staff
- 13 employees
- 9 in advisory functions
- 1 soliciting firm
- Owns 25% to 50% of Essex Investment Management Company, LLC
Joseph McNay
Control person · since October 2012
- Owns 10% to 25% of Essex Investment Management Company, LLC
Nancy Prial
Control person · since March 2015
- Owns 10% to 25% of Essex Investment Management Company, LLC
Hippogriffe Investment LLC
since February 2015
- Owns 75% or more of Hippogriffe Investment LLC
Robert Uek
Control person · since February 2015
- Owns 5% to 10% of Essex Investment Management Company, LLC
Saralyn Sacks
since March 2015
- Owns 5% to 10% of Essex Investment Management Company, LLC
Drakes Maine LLC
since February 2015
- Owns 75% or more of Drakes Maine LLC
Michael McCarthy
Control person · since February 2015
- Owns 5% to 10% of Essex Investment Management Company, LLC
Courcap LLC
since February 2015
- Owns 75% or more of Courcap LLC
Martin Cournan
Control person · since February 2015
- Owns 5% to 10% of Essex Investment Management Company, LLC
Lockes Investment LLC
since February 2015
- Owns 75% or more of Lockes Investment LLC
Elizabeth Giroux
Control person · since February 2015
- Owns 5% to 10% of Essex Investment Management Company, LLC
Burnt Mountain Investments LLC
since February 2015
- Owns 75% or more of Burnt Mountain Investments LLC
William Page
Control person · since February 2015
- Owns 5% to 10% of Essex Investment Management Company, LLC
Annemarie McMichael
since February 2015
Essex Investment Management’s regulatory assets fell from $799M (March 2021) to $713M (March 2026); clients fell from 172 to 117 and employees from 14 to 13.
Figures from each annual filing
| Filed | Regulatory AUM | Clients | Employees | Offices |
|---|---|---|---|---|
| March 2026 | $713M | 117 | 13 | 2 |
| March 2025 | $610M | 110 | 12 | 2 |
| April 2024 | $627M | 148 | 12 | 2 |
| March 2023 | $627M | 168 | 15 | 2 |
| March 2022 | $845M | 169 | 15 | 2 |
| March 2021 | $799M | 172 | 14 | 2 |
Besides its headquarters, Essex Investment Management has 1 office, with 2 listed addresses in Illinois and Massachusetts.
Illinois · 1 listed address
- 1603 Orrington Ave, Evanston
Massachusetts · 1 listed address
- 125 High Street, Suite 1803, BostonHQ
Contact and registration details
- Legal name
- Essex Investment Management Company, LLC
- Headquarters
- 125 High Street, Suite 1803, Boston, MA 02110
- Website
- essexinvest.com
- Phone
- 617-342-3200
- @essex-investment-management
- SEC file
- 801-55496
- Structure
- Delaware LLC
- Fiscal year end
- December
Essex Investment Management uses State Street Bank and Trust ($223M, 44%), J.P. Morgan ($103M, 20%) and FNZ Trust ($102M, 20%), among others, as custodians for its separately managed accounts. Essex Investment Management does not have custody of client assets.
- State Street Bank and TrustState Street Bank and Trust Company · Quincy, MA · $223M44%
- FNZ TrustFNZ Trust Company · Quincy, MA · $102M20%
- J.P. MorganJ.P. Morgan Securities Inc. · New York, NY · $103M20%
- BNY Mellon Capital MarketsBNY Mellon Capital Markets, LLC · New York, NY · $74M15%
At year end, Essex Investment Management’s separately managed accounts were mostly in stocks (93%). Its reported 13F holdings for the quarter ended 30 June 2026 total $763M across 306 positions; the largest are Tower Semiconductor Ltd (3.6%), Lincoln Edl Svcs Corp. (2.2%) and Kiniksa Pharmaceuticals Intl P (2.0%).
What the accounts hold
- Stocks93%
- Bonds3%
- Cash4%
Reported 13F holdings
- $763M
- Reported 13F value
- 306
- Positions
- 20.1%
- In the 10 largest
- +20.8%
- Value vs. prior quarter
- Tower Semiconductor Ltd3.6%
- Lincoln Edl Svcs Corp.2.2%
- Kiniksa Pharmaceuticals Intl P2.0%
- Ouster Inc.1.9%
- Ligand Pharmaceuticals Inc.1.8%
- Ceco Environmental Corp.1.8%
- Sterling Infrastructure Inc.1.8%
- Arteris Inc.1.8%
- Mirum Pharmaceuticals Inc.1.6%
- Argan Inc.1.6%
Together, the ten largest are 20.1% of reported value.
How many clients does Essex Investment Management have?
Essex Investment Management has 117 clients and manages $713 million for them, as of March 2026. They include 55 high-net-worth individuals, 35 individual clients and 14 charitable organizations.
Source: Form ADV Part 1A, Items 5.D and 5.F, filed 30 March 2026
What services does Essex Investment Management offer?
Essex Investment Management provides portfolio management for individuals and small businesses, portfolio management for investment companies, portfolio management for pooled vehicles, and portfolio management for institutions.
Source: Form ADV Part 1A, Item 5.G, from the SEC's 2 October 2026 data file
Which custodians does Essex Investment Management use?
Essex Investment Management’s separately managed account assets are held at State Street Bank and Trust Company (Quincy, MA), with $223M, J.P. Morgan Securities Inc. (New York, NY), with $103M, FNZ Trust Company (Quincy, MA), with $102M and BNY Mellon Capital Markets, LLC (New York, NY), with $74M. Only custodians holding at least a tenth of those assets are named.
Source: Form ADV Part 1A, Schedule D, Section 5.K.(3), filed 30 March 2026
How many financial advisors does Essex Investment Management have?
Essex Investment Management has 0 investment adviser representatives registered with state securities authorities, out of 13 employees, and 9 perform investment advisory functions. None are registered representatives of a broker-dealer or licensed insurance agents.
Source: Form ADV Part 1A, Items 5.A and 5.B, from the SEC's 2 October 2026 data file
What does Essex Investment Management invest in?
At the end of its last fiscal year, Essex Investment Management’s separately managed accounts held 93% exchange-traded equities, 4% cash and equivalents and 3% U.S. government and agency bonds.
Source: Form ADV Part 1A, Items 5.K.(1) and 7.B, from the SEC's 2 October 2026 data file
Who owns Essex Investment Management?
Essex Investment Management is owned through holding companies by Robert Uek, Michael McCarthy, Martin Cournan, Elizabeth Giroux and William Page. Its direct owners are Joseph McNay, Nancy Prial, Hippogriffe Investment LLC, Saralyn Sacks, Drakes Maine LLC, Courcap LLC, Lockes Investment LLC, Burnt Mountain Investments LLC and Annemarie McMichael, each holding 50% or less.
Source: Form ADV Part 1A, Schedules A and B, filed 30 March 2026
How does Essex Investment Management get paid?
Essex Investment Management is paid through a percentage of assets under management. Its Form ADV lists no commissions or performance-based fees among how it is paid.
Source: Form ADV Part 1A, Item 5.E, from the SEC's 2 October 2026 data file
How do I contact Essex Investment Management?
Essex Investment Management’s main office is at 125 High Street, Suite 1803, Boston, MA 02110. Its phone number is 617-342-3200. Its website is essexinvest.com.