SourcingSourcing

ARDSLEY ADVISORY PARTNERS LP

C31
CRD 301116·SEC 801-114966·NORWALK, CT
AUM
$1.64B
$1B+
Est. Revenue
$16.4M
@ 1% on AUM
Est. EBITDA
$4.9M
@ 30% margin
Est. Deal Value
$39.3M
@ 8× EBITDA

Identity

Registrations & legal identity

Legal name
ARDSLEY ADVISORY PARTNERS LP
CRD
301116
SEC file #
801-114966
EIN
000000000
DBA names
Ardsley Partners

Economics

AUM
$1.64B
AUM band
$1B+
AUM trajectory
'20'26
$706.7M → $1.64B▲ +131%
Client mix
Pooled Investment Vehicles9
Other2

Operations

Employees (total)
11
Advisory staff (per ADV)
7
Advisory staff (5-yr trend)
'20'26
7 advisors → 7 advisors▬ 0%
Primary office
NORWALK CT
Branches
—

Custodian & Brokerage

Primary custodian
Goldman Sachslow confidence
Services offered
Portfolio mgmt — pooled vehiclesPortfolio mgmt — businesses
Fee basis
% of AUMPerformance-based fees

Filings

Latest ADV filing
02/24/2026
ADV-W filed at
—
Website
ardsley.com

Compliance

Disclosures (firm)
0
Trademark
—
Additional signalsExpand ▾

Ownership & succession ★

Who controls the firm + pre-computed succession flags

Top Owner Name
HEMPLEMAN, PHILIP, JAY
Top Owner Pct
62.5
Top Owner Entity Kind
I
Owner Count
6
Control Persons
HEMPLEMAN, PHILIP, JAY
BALZER, KIRK, DANIEL
Solo Advisor Indicator
No
Succession Risk Solo Owner
No
Is Parent Owned Subsidiary
No

Availability / M&A ★

Already-acquired = skip; deal comps

Adv W Filed
No

Web presence ★

Stale website = winding down

Web Signal Quality
ok
Rdap Domain
ARDSLEY.COM
Rdap Domain Creation Date
1995-12-06T05:00:00Z
Rdap Firm Age Years
31
Rdap Firm Age Band
20+y
Rdap Registrar
Network Solutions, LLC

Retirement-plan book (Form 5500) ★

401(k)/plan business — cross-sell value

Retirement Plan Book
No

SEC EDGAR

Edgar Cik
0001485583
Edgar Registered
Yes
Edgar Filing Count
74
Edgar First Filing Date
2010-03-11
Edgar Last Filing Date
2025-11-17
Edgar Form D Count
18
Edgar Form D Offerings
2025-11-172025-11-17 · 0001485583-25-000004
2024-11-182024-11-18 · 0001598118-24-000006
Edgar Former Names
Ardsley Partners Renewable Energy Fund, L.P.

Local market & wealth

Rank targets by how wealthy the local market is

Soi High Wealth Score
0.6393
Soi Zip Pct 200k Plus
0.4754
Soi Zip Returns 200k Plus
870
Soi Zip Total AGI
985,540
Fdic Zip Total Deposits
2,782,894,000
Fdic Zip Branch Count
50
Fdic Zip Top Banks
Fairfield County Bank
Darien Rowayton Bank

Compliance & brand

Firm Registration Status
active

All other collected signals (27)

Everything else we've pulled for this record, not yet curated into a section.

Adv W Recently Filed
No
Bc Firm Active Bc Count
0
Bc Firm Active IA Count
0
Bc Firm IAR Count
0
Custodian Candidates
Full
Goldman Sachs24
Northern Trust19
Morgan Stanley14
E*trade4
Edgar Addresses
Mailing
C/O ARDSLEY PARTNERS I GP, LLC105 ROWAYTON AVENUENORWALK, CT 06853
Business
C/O ARDSLEY PARTNERS I GP, LLC105 ROWAYTON AVENUENORWALK, CT 06853
Edgar EIN
000000000
Edgar Recent Filings
D/A2025-11-17 · 0001485583-25-000004
D/A2024-11-18 · 0001598118-24-000006
Fdic Zip Branches Raw
Fairfield County Savings BankNorwalk, CT
Fairfield County Savings BankNorwalk, CT
Fdic Zip HHI
3095.71
Fdic Zip Top Bank Share Pct
50.86
Fdic Zip Year
2025
Firm Has Custody
Yes
Mailing Office Differs
No
Rdap Domain Expiration Date
2035-12-05T05:00:00Z
Rdap Domain Last Changed
2025-12-06T05:32:24Z
Rdap Nameservers
Ns1.bdm.microsoftonline.comNs2.bdm.microsoftonline.comNs3.bdm.microsoftonline.comNs4.bdm.microsoftonline.com
Rdap Secure Dns Enabled
No
Rdap Status
Client Transfer Prohibited
Soi Year
2022
Soi Zip Distribution
Stub 1
AGI2,795
Returns310
Stub 2
AGI5,329
Returns140
Stub 3
AGI6,550
Returns100
Soi Zip Total Business Income
32,223
Soi Zip Total Cap Gains
180,413
Soi Zip Total Dividends
66,785
Soi Zip Total Returns
1830
Top Owner CRD
1891533
Trust Company Affiliate
Yes

People (5)

5
HEMPLEMAN, PHILIP, JAY
Direct Owner · 62.5%
1891533
BALZER, KIRK, DANIEL
Direct Owner · 17.5%
2166167
HEMPLEMAN, SPENCER, JAY
Direct Owner · 17.5%
4011098
BLOCK, BENJAMIN, IAN
Executive Officer · 2.5%
5956330
NAPOLI, STEVEN, NICHOLAS
Executive Officer · 2.5%
2239285