Ardsley Advisory Partners LP
● SEC registered since 2019CRD 301116SEC# 801-114966Norwalk, CT
Ranks #2,424 of 6,030 private fund managers by regulatory AUM.
Reg. AUM
$1.64B
Fund GAV
$838M
Private funds
6
Employees
11
Accounts
11
Location
Norwalk, CT
Ardsley Advisory Partners LP assets under management
Ardsley Advisory Partners LP is an SEC-registered investment adviser based in Norwalk, CT. The firm has been registered since 2019. It reports $1.6 billion in regulatory assets under management and employs 11 people. Ardsley Advisory Partners LP manages 6 private funds with combined gross assets of $838 million, including Ardsley Partners Advanced Healthcare Fund, L.P. By regulatory assets, it ranks 2,424 of 6,030 private fund managers.
Ardsley Advisory Partners LP private funds
6 funds · $838M GAV| Fund | Type | Gross assets | Min. |
|---|---|---|---|
| Ardsley Partners Advanced Healthcare Fund, L.P. | Hedge | $332.4M | $1M |
| Ardsley Sustainable Opportunities Fund, L.P. | Hedge | $309.6M | $1M |
| Ardsley World Information Technology Fund, L.P. | Hedge | $108.5M | $1M |
| Ardsley Partners Fund II, LP | Hedge | $54.3M | $1M |
| Ardsley Duckdive Fund LP | Hedge | $25.6M | $1M |
| Ardsley World Information Technology Offshore Fund Ltd. | Hedge | $7.6M | $1M |
Ardsley Advisory Partners LP owners & executives
8 reported| Name | Title | Ownership | Since |
|---|---|---|---|
| Ardsley Advisory Partners GP LLC Control | General Partner | Under 5% | 2018 |
| Benjamin Ian Block Control | Limited Partner | Under 5% | 2007 |
| Kirk Daniel Balzer Control | Limited Partner | 10-25% | 1998 |
| Philip Jay Hempleman Control | Limited Partner | 50-75% | 1986 |
| Spencer Jay Hempleman Control | Limited Partner | 10-25% | 2006 |
| Steven Nicholas Napoli Control | Limited Partner, Chief Financial Officer, Chief Compliance Officer | Under 5% | 2001 |
| Philip Jay Hempleman Control | Managing Member | 50-75% | 2018 |
| Spencer Jay Hempleman Control | Managing Member | 50-75% | 2018 |
Frequently asked questions
How much does Ardsley Advisory Partners LP manage?
Ardsley Advisory Partners LP reports $1.6 billion in regulatory assets under management on its Form ADV.
How many private funds does Ardsley Advisory Partners LP manage?
Ardsley Advisory Partners LP manages 6 private funds with combined gross assets of $838 million.
How many employees does Ardsley Advisory Partners LP have?
Ardsley Advisory Partners LP reports 11 employees.
Where is Ardsley Advisory Partners LP located?
Ardsley Advisory Partners LP is based in Norwalk, CT and has been SEC-registered since 2019.
Does Ardsley Advisory Partners LP disclose fund performance?
Ardsley Advisory Partners LP is not required to publicly disclose fund returns. Form ADV filings include assets, ownership, and service providers, shown above.
Contact & registration
| Address | 105 Rowayton Ave., Norwalk, CT 06853 |
| Phone | 203-564-4200 |
| Fax | 203-355-0715 |
| Office hours | 9:00a.m. - 5:00p.m. |
| SEC region | Boston Regional Office (BRO) |
| CIK | 900529 |
| Discloses disciplinary history | No |
Regulatory AUM
$1.64B▲ 43%
Mar '25Form ADV, monthlyJul '26
How this firm compares
Regulatory AUMTop 25%
Larger than 75% of 16,306 advisers
AUM vs fund managersTop 40%
Larger than 60% of 6,030 private-fund managers
Number of fundsTop 36%
More funds than 64% of fund managers
EmployeesTop 38%
More than 62% of 16,824 advisers
Assets under management
$1.64Bregulatory AUM
Discretionary $1.64B
Service providers
Auditor
Prime broker
Custodian
Administrator