First Manhattan Co. LLC is an SEC registered investment adviser organized as a limited liability company with a primary office location in New York, NY.
Portfolio management for individuals and small businesses
Fee models offered
2 types reported
Asset based fees
Performance-based fees
Source verified May 13, 2026
Client Coverage Demographics
Top client segmentHNWI represent 60.8% of total clients.
Top client categories% of clientsClients
1
HNWI
60.8%
3,828
2
Individuals
35.8%
2,252
3
Charitable
1.7%
108
4
Pension Plans
1.5%
95
5
Pooled Investment Vehicles
0.1%
9
Additional categories (<0.1%)
Investment Cos.<5 clients
Regulatory Assets Under Management Breakdown
Total regulatory assets under management$38.1Bas of April 1, 2026
Discretionary93.6%
$35.7B
94% of total RAUM93.6%
Non-discretionary6.4%
$2.4B
6% of total RAUM6.4%
Regulatory assets under management are split between discretionary and non-discretionary assets.
Assets under management Growth by Quarter
Quarterly points use the latest ADV filing or SEC roster snapshot available in each quarter.
Latest AUM$38.1B
Total Accounts6,294
10Y AUM Change+$14.5B (+61.4%)
Employee Growth by Quarter
Quarterly points use the latest ADV filing or SEC roster snapshot available in each quarter.
Total Employees147
Clients per Employee43:1
10Y Employee Change+17 (+13.1%)
* Metrics are based on the latest available data, including Form ADV filings, brochures, and relationship summaries pulled from the SEC IAPD, and may be subject to change. Learn what is included in the Rialytix data. Please refer to the firm's official disclosures for the most accurate information using their CRD number. This is not investment advice.