Coston, McIsaac, and Partners provides portfolio management for individuals and small businesses and selecting other managers.
Coston, McIsaac, and Partners reports 1,254 clients. They include 1,019 individual clients and 235 high-net-worth individuals. Of its assets, 100.0% ($467M across 1,254 accounts) are managed with discretion. It advised 1,254 clients without assets under management last fiscal year.
| Client type | Clients | Assets |
|---|---|---|
| Individuals (other than HNW) | 81% | 42% |
| High-net-worth individuals | 19% | 58% |
Client breakdown and activity details
| Client type | Clients | Regulatory AUM | AUM share | Avg. per client |
|---|---|---|---|---|
| Individuals (other than HNW) | 1,019 | $197M | 42.2% | $193K |
| High-net-worth individuals | 235 | $270M | 57.8% | $1.15M |
| Total | 1,254 | $467M | 100% | $372K |
- Clients
- 1,019
- Regulatory AUM
- $197M
- AUM share
- 42.2%
- Avg. per client
- $193K
- Clients
- 235
- Regulatory AUM
- $270M
- AUM share
- 57.8%
- Avg. per client
- $1.15M
Total
- Clients
- 1,254
- Regulatory AUM
- $467M
- AUM share
- 100%
- Avg. per client
- $372K
- Clients outside the U.S.
- 0%
- Clients advised without assets under management last fiscal year
- 1,254
- Private funds advised
- 0
- Financial planning clients last fiscal year
- 0
Coston, McIsaac, and Partners charges 0.60%–1.25% a year for its Management Services. The fee is billed in advance and requires an account of at least $250,000. The brochure also prices one other service, listed under fee details.
Fee details and sources
Other fees
- Consulting Services
- Offered one-time or on a project basis under a written agreement that sets the fee; the brochure states no rate.
Andrew Shea owns 50% to 75% of Coston, McIsaac, and Partners. The leadership team of Coston, McIsaac, and Partners includes President Paul Coston and Chief Operating Officer Nicholas Shaw. It has 12 employees, 11 of them in advisory roles.
Staff
- 12 employees
- 11 in advisory functions
- 10 state-registered reps
- Owns 50% to 75% of Coston, McIsaac, and Partners Inc.
Andrew Shea
Control person · since July 2015
- Owns 10% to 25% of Coston, McIsaac, and Partners Inc.
Chester Lloyd
Control person · since March 2015
- Owns 10% to 25% of Coston, McIsaac, and Partners Inc.
Paul Coston
Control person · since March 2015
Coston, McIsaac, and Partners’ regulatory assets grew 2.5× from $190M (February 2021) to $467M (May 2026); clients fell from 10,045 to 1,254 and employees rose from 7 to 12.
Figures from each annual filing
| Filed | Regulatory AUM | Clients | StaffEmployees | Offices |
|---|---|---|---|---|
| May 2026May 2026 | $467M | 1,254 | 12 | 2 |
| Jun 2025June 2025 | $406M | 1,513 | 10 | 2 |
| Jul 2024July 2024 | $344M | 1,445 | 10 | 1 |
| Feb 2023February 2023 | $292M | 1,301 | 10 | 1 |
| Jan 2022January 2022 | $251M | 1,158 | 9 | 1 |
| Feb 2021February 2021 | $190M | 10,045 | 7 | 1 |
Besides its headquarters, Coston, McIsaac, and Partners has 1 office, with 2 listed addresses in 1 state.
Maine · 2 listed addresses
- 38 Rodick Street-Suite B, Bar HarborHQ
- 102 Main Street, Ellsworth
Other business names
Coston, McIsaac, and Partners has reported 1 other business name to the SEC.
- Coston, McIsaac & Shea Financial Advisors
Contact and registration details
- Legal name
- Coston, McIsaac, and Partners Inc.
- Headquarters
- 38 Rodick Street-Suite B, Bar Harbor, ME 04609-1806
- Website
- costonshea.com
- Phone
- 207-288-4747
- SEC file
- 801-96330
- Structure
- Maine corporation
- Fiscal year end
- December
Coston, McIsaac, and Partners’ named custodians for separately managed accounts are Charles Schwab ($292M, 100%) and Axos Clearing ($154K, 0%). Coston, McIsaac, and Partners does not have custody of client assets.
- Charles SchwabCharles Schwab & Co., Inc. · San Francisco, CA · $292M100%
- Axos ClearingAxos Clearing LLC · Omaha, NE · $154K0%
At year end, Coston, McIsaac, and Partners’ separately managed accounts were mostly in stocks (75%) and funds (16%).
What the accounts hold
- Stocks75%
- Funds16%
- Pooled vehicles13%
- Registered funds3%
- Bonds2%
- Cash7%
How many clients does Coston, McIsaac, and Partners have?
Coston, McIsaac, and Partners has 1,254 clients and manages $467 million for them, as of May 2026. They include 1,019 individual clients and 235 high-net-worth individuals.
Source: Form ADV Part 1A, Items 5.D and 5.F, filed 21 May 2026
What services does Coston, McIsaac, and Partners offer?
Coston, McIsaac, and Partners provides portfolio management for individuals and small businesses and selecting other managers.
Source: Form ADV Part 1A, Item 5.G, from the SEC's 2 October 2026 data file
How much does Coston, McIsaac, and Partners charge?
Coston, McIsaac, and Partners charges 0.60%–1.25% a year for its Management Services. The fee is billed in advance and requires an account of at least $250,000.
Which custodians does Coston, McIsaac, and Partners use?
Coston, McIsaac, and Partners’ separately managed account assets are held at Charles Schwab & Co., Inc. (San Francisco, CA), with $292M and Axos Clearing LLC (Omaha, NE), with $154K. Only custodians holding at least a tenth of those assets are named.
Source: Form ADV Part 1A, Schedule D, Section 5.K.(3), filed 21 May 2026
How many financial advisors does Coston, McIsaac, and Partners have?
Coston, McIsaac, and Partners has 10 investment adviser representatives registered with state securities authorities, out of 12 employees, and 11 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 Coston, McIsaac, and Partners invest in?
At the end of its last fiscal year, Coston, McIsaac, and Partners’ separately managed accounts held 75% exchange-traded equities, 13% pooled vehicles (private funds and similar), 7% cash and equivalents, 3% registered funds (mutual funds, ETFs, BDCs) and 2% 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
Does Coston, McIsaac, and Partners have a minimum investment?
Yes, Coston, McIsaac, and Partners’ minimum account size for its Management Services is $250K.
Who owns Coston, McIsaac, and Partners?
Coston, McIsaac, and Partners’ direct owners are Chester Lloyd (10% to 25%), Paul Coston (10% to 25%) and Andrew Shea (50% to 75%).
Source: Form ADV Part 1A, Schedules A and B, filed 21 May 2026
How does Coston, McIsaac, and Partners get paid?
Coston, McIsaac, and Partners is paid through a percentage of assets under management and fixed fees. 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 Coston, McIsaac, and Partners?
Coston, McIsaac, and Partners’ main office is at 38 Rodick Street-Suite B, Bar Harbor, ME 04609-1806. Its phone number is 207-288-4747. Its website is costonshea.com.