First Long Island Investors provides portfolio management for individuals and small businesses, portfolio management for pooled vehicles, portfolio management for institutions, selecting other managers, publishing newsletters, and educational seminars. The firm advises 9 private funds.
First Long Island Investors reports 546 clients. They include 325 high-net-worth individuals, 170 individual clients and 20 pooled investment vehicles. Of its assets, 100.0% ($1.86B across 940 accounts) are managed with discretion. It advised 73 clients without assets under management last fiscal year.
| Client type | Clients | Assets |
|---|---|---|
| Individuals (other than HNW) | 31% | 3% |
| High-net-worth individuals | 60% | 60% |
| Pooled investment vehicles | 4% | 31% |
| Pension and profit-sharing plans | 2% | 3% |
| Charitable organizations | 3% | 1% |
| Other client typesCorporations and other businesses | 1% | 2% |
Client breakdown and activity details
| Client type | Clients | Regulatory AUM | AUM share | Avg. per client |
|---|---|---|---|---|
| Individuals (other than HNW) | 170 | $57.8M | 3.1% | $340K |
| High-net-worth individuals | 325 | $1.12B | 60.1% | $3.44M |
| Pooled investment vehicles | 20 | $569M | 30.6% | $28.4M |
| Pension and profit-sharing plans | 9 | $59.5M | 3.2% | $6.61M |
| Charitable organizations | 15 | $25.6M | 1.4% | $1.71M |
| Corporations and other businesses | 7 | $30.6M | 1.6% | $4.37M |
| Total | 546 | $1.86B | 100% | $3.41M |
- Clients
- 170
- Regulatory AUM
- $57.8M
- AUM share
- 3.1%
- Avg. per client
- $340K
- Clients
- 325
- Regulatory AUM
- $1.12B
- AUM share
- 60.1%
- Avg. per client
- $3.44M
- Clients
- 20
- Regulatory AUM
- $569M
- AUM share
- 30.6%
- Avg. per client
- $28.4M
- Clients
- 9
- Regulatory AUM
- $59.5M
- AUM share
- 3.2%
- Avg. per client
- $6.61M
- Clients
- 15
- Regulatory AUM
- $25.6M
- AUM share
- 1.4%
- Avg. per client
- $1.71M
- Clients
- 7
- Regulatory AUM
- $30.6M
- AUM share
- 1.6%
- Avg. per client
- $4.37M
Total
- Clients
- 546
- Regulatory AUM
- $1.86B
- AUM share
- 100%
- Avg. per client
- $3.41M
- Clients outside the U.S.
- 0%
- Clients advised without assets under management last fiscal year
- 73
- Private funds advised
- 9
First Long Island Investors is paid through a percentage of assets under management, fixed fees (other than subscription fees) and performance-based fees. The reviewed brochures do not disclose an asset-based fee rate. Read the SEC-filed brochure.
First Long Island Investor Holdings, Inc. owns 75% or more of First Long Island Investors and is in turn owned by Robert Rosenthal (50–75%) and Ralph Palleschi (25–50%). The leadership team of First Long Island Investors includes President Brian Gamble, Chief Operating Officer Ralph Palleschi and Chief Financial Officer Therese Vobis. It has 24 employees, 8 of them in advisory roles.
Leadership
- Brian GambleSenior Vice President - Private Wealth Management
- Jonathan GolubSenior Vice President, General
- Ralph PalleschiPresident and Chief Operating Officer
- Therese VobisSenior Vice President, Finance & Administration and Chief Financial Officer
- Philip MalakoffExecutive Managing Director and Director of Research
- Edward PalleschiExecutive Managing Director
- Robert RosenthalManager, Chairman, CEO
Investment adviser representatives
7 representatives listed in the SEC register as of 9 October 2026.
- Brian Phillip Gamble
- Dylan Paul Klein
- Wesley Xavier Llado
- Philip W Malakoff
- Edward Charles Palleschi
- Ralph Francis Palleschi
- Robert Daniel Rosenthal
Staff
- 24 employees
- 8 in advisory functions
- 7 state-registered reps
- 8 broker-dealer reps
- 1 insurance agent
- 4 soliciting firms
- Owns 75% or more of First Long Island Investors, LLC
First Long Island Investor Holdings, Inc.
Control person · since July 2019
- Owns 50% to 75% of First Long Island Investor Holdings, Inc.
Robert Rosenthal
Control person · since August 1998
- Owns 25% to 50% of First Long Island Investor Holdings, Inc.
Ralph Palleschi
Control person · since June 1999
- Owns 75% or more of First Long Island Investors, LLC
First Long Island Investor
Control person · since July 2019
- Owns 75% or more of First Long Island Investors, LLC
Kudu Investment Holdings, LLC
Control person · since December 2019
- Owns 75% or more of Kudu Investment Holdings, LLC
Kudu Investment Management LLC
Control person · since December 2019
- Owns 75% or more of Kudu Investment Management LLC
WM Regent LTD.
Control person · since October 2020
- Owns 75% or more of WM Regent LTD.
WM International Holdings LTD.
Control person · since October 2020
- Owns 75% or more of WM International Holdings LTD.
Bridge Holdings (Bermuda) LTD.
Control person · since October 2020
- Owns 75% or more of Bridge Holdings (Bermuda) LTD.
White Mountains Insurance Group, LTD.
Control person · since October 2020
First Long Island Investors’ regulatory assets grew from $1.48B (March 2021) to $1.86B (March 2026); clients rose from 380 to 546 and employees from 20 to 24.
Figures from each annual filing
| Filed | Regulatory AUM | Clients | Employees | Offices |
|---|---|---|---|---|
| March 2026 | $1.86B | 546 | 24 | 1 |
| March 2025 | $1.71B | 542 | 24 | 1 |
| March 2024 | $1.55B | 386 | 26 | 1 |
| March 2023 | $1.35B | 394 | 25 | 1 |
| March 2022 | $1.74B | 386 | 21 | 1 |
| March 2021 | $1.48B | 380 | 20 | 1 |
Besides its headquarters, First Long Island Investors has 0 offices, with 1 listed address in New York.
New York · 1 listed address
- One Jericho Plaza, Suite 201, JerichoHQ
Contact and registration details
- Legal name
- First Long Island Investors, LLC
- Headquarters
- One Jericho Plaza, Suite 201, Jericho, NY 11753-1673
- Website
- fliinvestors.com
- Phone
- 516-935-1200
- @first-long-island-investors-llc
- SEC file
- 801-21607
- Structure
- New York LLC
- Fiscal year end
- December
First Long Island Investors uses UBS Financial Services ($1.33B) as custodian for its separately managed accounts. First Long Island Investors has custody of $554M in client assets for 9 clients.
- UBS Financial ServicesUBS Financial Services Inc. · Uniondale, NY · $1.33B100%
At year end, First Long Island Investors’ separately managed accounts were mostly in stocks (86%) and bonds (10%). Its reported 13F holdings for the quarter ended 30 June 2026 total $1.41B across 73 positions; the largest are Amphenol Corp. New CL A (5.6%), Nvidia Corporation (5.0%) and Amazon Com Inc. (4.9%).
What the accounts hold
- Stocks86%
- Bonds10%
- U.S. government and agency bonds6%
- State and local bonds2%
- Investment grade corporate bonds2%
- Cash4%
Reported 13F holdings
- $1.41B
- Reported 13F value
- 73
- Positions
- 42.0%
- In the 10 largest
- +14.4%
- Value vs. prior quarter
- Amphenol Corp. New CL A5.6%
- Nvidia Corporation5.0%
- Amazon Com Inc.4.9%
- Microsoft Corp.4.2%
- Alphabet Inc. Cap Stk CL A4.2%
- Parker Hannifin Corp.4.2%
- Lilly Eli & CO3.9%
- Taiwan Semiconductor Mfg Ltd S3.3%
- Broadcom Ltd Sgd3.3%
- Visa Inc. Com CL A3.3%
Together, the ten largest are 42.0% of reported value.
How many clients does First Long Island Investors have?
First Long Island Investors has 546 clients and manages $1.86 billion for them, as of March 2026. They include 325 high-net-worth individuals, 170 individual clients and 20 pooled investment vehicles.
Source: Form ADV Part 1A, Items 5.D and 5.F, filed 31 March 2026
What services does First Long Island Investors offer?
First Long Island Investors provides portfolio management for individuals and small businesses, portfolio management for pooled vehicles, portfolio management for institutions, selecting other managers, publishing newsletters, and educational seminars.
Source: Form ADV Part 1A, Item 5.G, from the SEC's 2 October 2026 data file
Which custodians does First Long Island Investors use?
First Long Island Investors’ separately managed account assets are held at UBS Financial Services Inc. (Uniondale, NY), with $1.33B. Only custodians holding at least a tenth of those assets are named.
Source: Form ADV Part 1A, Schedule D, Section 5.K.(3), filed 31 March 2026
How many financial advisors does First Long Island Investors have?
First Long Island Investors has 7 investment adviser representatives registered with state securities authorities, out of 24 employees, and 8 perform investment advisory functions. 8 employees are registered representatives of a broker-dealer and 1 employee is a licensed insurance agent.
Source: Form ADV Part 1A, Items 5.A and 5.B, from the SEC's 2 October 2026 data file
What does First Long Island Investors invest in?
At the end of its last fiscal year, First Long Island Investors’ separately managed accounts held 86% exchange-traded equities, 6% U.S. government and agency bonds, 4% cash and equivalents, 2% state and local bonds and 2% investment grade corporate bonds. It advises 9 private funds.
Source: Form ADV Part 1A, Items 5.K.(1) and 7.B, from the SEC's 2 October 2026 data file
Who owns First Long Island Investors?
First Long Island Investors is owned through a chain of holding companies by Robert Rosenthal, Ralph Palleschi and White Mountains Insurance Group, LTD. Its direct owners are First Long Island Investor Holdings, Inc. (75% or more), First Long Island Investor (75% or more) and Kudu Investment Holdings, LLC (75% or more).
Source: Form ADV Part 1A, Schedules A and B, filed 31 March 2026
How does First Long Island Investors get paid?
First Long Island Investors is paid through a percentage of assets under management, fixed fees and performance-based fees. Its Form ADV lists no commissions 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 First Long Island Investors?
First Long Island Investors’ main office is at One Jericho Plaza, Suite 201, Jericho, NY 11753-1673. Its phone number is 516-935-1200. Its website is fliinvestors.com.