S & Co. provides portfolio management for individuals and small businesses, portfolio management for pooled vehicles, and selecting other managers. The firm advises 6 private funds.
S & Co. reports 383 clients. They include 302 high-net-worth individuals, 58 individual clients and 17 charitable organizations. Of its assets, 100.0% ($2.46B across 383 accounts) are managed with discretion.
| Client type | Clients | Assets |
|---|---|---|
| Individuals (other than HNW) | 15% | <1% |
| High-net-worth individuals | 79% | 59% |
| Pooled investment vehicles | 2% | 33% |
| Charitable organizations | 4% | 7% |
Client breakdown and activity details
| Client type | Clients | Regulatory AUM | AUM share | Avg. per client |
|---|---|---|---|---|
| Individuals (other than HNW) | 58 | $15.3M | 0.6% | $264K |
| High-net-worth individuals | 302 | $1.45B | 59.0% | $4.8M |
| Pooled investment vehicles | 6 | $821M | 33.4% | $137M |
| Charitable organizations | 17 | $170M | 6.9% | $10M |
| Total | 383 | $2.46B | 100% | $6.41M |
- Clients
- 58
- Regulatory AUM
- $15.3M
- AUM share
- 0.6%
- Avg. per client
- $264K
- Clients
- 302
- Regulatory AUM
- $1.45B
- AUM share
- 59.0%
- Avg. per client
- $4.8M
- Clients
- 6
- Regulatory AUM
- $821M
- AUM share
- 33.4%
- Avg. per client
- $137M
- Clients
- 17
- Regulatory AUM
- $170M
- AUM share
- 6.9%
- Avg. per client
- $10M
Total
- Clients
- 383
- Regulatory AUM
- $2.46B
- AUM share
- 100%
- Avg. per client
- $6.41M
- Clients outside the U.S.
- 0%
- Clients advised without assets under management last fiscal year
- 0
- Private funds advised
- 6
S & Co. is paid through a percentage of assets under management. The reviewed brochures do not disclose an asset-based fee rate. Read the SEC-filed brochure.
The leadership team of S & Co. includes President George Jeppson and Chief Compliance Officer John Stiles. It has 15 employees, 6 of them in advisory roles.
Leadership
- George JeppsonDirector, President
- Brian McCarthyDirector, Senior Vice President, Treasurer
- Matthew MegargelDirector, Senior Vice President and Clerk
- Thomas QuirkDirector and Senior Vice President
- John StilesChief Compliance Officer, Vice President
- Jeffrey ThompsonDirector, Senior Vice President
- George SaltonstallVice Chairman of the Board of Directors
- Neil ThompsonDirector and Chairman
Staff
- 15 employees
- 6 in advisory functions
- Owns 10% to 25% of S & Co., Inc.
Neil Thompson
Control person · since January 1996
- Owns 10% to 25% of S & Co., Inc.
Matthew Megargel
Control person · since July 2014
- Owns 10% to 25% of S & Co., Inc.
George Jeppson
Control person · since July 2016
- Owns 10% to 25% of S & Co., Inc.
Jeffrey Thompson
Control person · since January 2018
- Owns 10% to 25% of S & Co., Inc.
Brian McCarthy
Control person · since January 2024
- Owns 5% to 10% of S & Co., Inc.
George Saltonstall
Control person · since January 2011
- Owns 5% to 10% of S & Co., Inc.
Thomas Quirk
Control person · since October 2019
S & Co.’s regulatory assets grew from $1.85B (March 2021) to $2.46B (March 2026); clients rose from 319 to 383 and employees were 15 in both filings.
Figures from each annual filing
| Filed | Regulatory AUM | Clients | Employees | Offices |
|---|---|---|---|---|
| March 2026 | $2.46B | 383 | 15 | 1 |
| March 2025 | $2.28B | 372 | 15 | 1 |
| March 2024 | $2.11B | 370 | 14 | 1 |
| March 2023 | $2.03B | 345 | 15 | 1 |
| March 2022 | $2.21B | 340 | 15 | 1 |
| March 2021 | $1.85B | 319 | 15 | 1 |
Besides its headquarters, S & Co. has 0 offices, with 1 listed address in Massachusetts.
Massachusetts · 1 listed address
- 50 Congress Street, Room 800, BostonHQ
Contact and registration details
- Legal name
- S & Co., Inc.
- Headquarters
- 50 Congress Street, Room 800, Boston, MA 02109
- Website
- Not reported
- Phone
- 617-227-8660
- SEC file
- 801-33273
- Structure
- Massachusetts corporation
- Fiscal year end
- December
S & Co. uses Fiduciary Trust ($2.41B) as custodian for its separately managed accounts. S & Co. has custody of $2.43B in client assets for 370 clients.
- Fiduciary TrustFiduciary Trust Company · Boston, MA · $2.41B100%
At year end, S & Co.’s separately managed accounts were mostly in funds (87%) and cash (10%). Its reported 13F holdings for the quarter ended 30 June 2026 total $1.73M across 222 positions; the largest are Caterpillar Inc.. (5.8%), Berkshire Hathaway Inc. CL B (4.7%) and Microsoft Corp. (4.3%).
What the accounts hold
- Funds87%
- Registered funds51%
- Pooled vehicles36%
- Bonds3%
- U.S. government and agency bonds1%
- State and local bonds1%
- Investment grade corporate bonds1%
- Cash10%
Reported 13F holdings
- $1.73M
- Reported 13F value
- 222
- Positions
- 38.4%
- In the 10 largest
- +7.4%
- Value vs. prior quarter
- Caterpillar Inc..5.8%
- Berkshire Hathaway Inc. CL B4.7%
- Microsoft Corp.4.3%
- Exxonmobil Holdings Corp.4.2%
- Apple Inc.3.7%
- Church & Dwight CO Inc.3.6%
- Ecolab Inc.3.6%
- Merck & CO Inc.3.2%
- Amazon.com Inc.2.7%
- Automatic Data Processing Inc.2.6%
Together, the ten largest are 38.4% of reported value.
How many clients does S & Co. have?
S & Co. has 383 clients and manages $2.46 billion for them, as of March 2026. They include 302 high-net-worth individuals, 58 individual clients and 17 charitable organizations.
Source: Form ADV Part 1A, Items 5.D and 5.F, filed 31 March 2026
What services does S & Co. offer?
S & Co. provides portfolio management for individuals and small businesses, portfolio management for pooled vehicles, and selecting other managers.
Source: Form ADV Part 1A, Item 5.G, from the SEC's 2 October 2026 data file
Which custodians does S & Co. use?
S & Co.’s separately managed account assets are held at Fiduciary Trust Company (Boston, MA), with $2.41B. 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 S & Co. have?
S & Co. has 0 investment adviser representatives registered with state securities authorities, out of 15 employees, and 6 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 S & Co. invest in?
At the end of its last fiscal year, S & Co.’s separately managed accounts held 51% registered funds (mutual funds, ETFs, BDCs), 36% pooled vehicles (private funds and similar), 10% cash and equivalents, 1% U.S. government and agency bonds, 1% state and local bonds and 1% investment grade corporate bonds. It advises 6 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 S & Co.?
S & Co.’s direct owners are Neil Thompson, George Saltonstall, Matthew Megargel, George Jeppson, Jeffrey Thompson, Thomas Quirk and Brian McCarthy, each holding 25% or less.
Source: Form ADV Part 1A, Schedules A and B, filed 31 March 2026
How does S & Co. get paid?
S & Co. is paid through a percentage of assets under management. 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 S & Co.?
S & Co.’s main office is at 50 Congress Street, Room 800, Boston, MA 02109. Its phone number is 617-227-8660.