← Directory
THE WATERMILL GROUP
Legal name: WATERMILL MANAGEMENT COMPANY, LLC
CRD 163370File 801-126185
APPROVED
Custody
Filing as of Mar 30, 2026
Feed vintage Oct 1, 2026
Regulatory AUM
$178.1M
Bottom 25% of cohort (national)
Discretionary AUM
$178.1M
Clients
18
18 accounts
Employees
13
Bottom 25% of cohort in MA
Identity & registration
ADV Item 1- Organization form
- Limited Liability Company
- Firm type
- Registered
- SEC region
- BRO
- Registration date
- Jul 22, 2022
- Principal office
- 321 NEWBURY ST, SECOND FLOOR, BOSTON, MA, 02115
- Phone
- 781-891-6660
- Website
- HTTPS://WWW.WATERMILL.COM
Assets & accounts
ADV Item 5F- Total regulatory AUM
- $178.1M
- Discretionary AUM
- $178.1M
- Non-discretionary AUM
- $0
- Discretionary accounts
- 18
- Non-discretionary accounts
- 0
- Total accounts
- 18
- AUM per client
- $9.9M
Clients by type
ADV Item 5D| Client type | Clients | AUM |
|---|---|---|
| Pooled investment vehicles | 18 | $178.1M |
Compensation & activities
ADV Items 5E, 5GCompensation
- Other
- Fixed fees
- Other (described) — MONITORING FEES
- Performance-based fees
Advisory activities
- Portfolio management for pooled investment vehicles
Custody
ADV Item 9- Firm Custody Cash
- Yes
- Firm Custody Assets
- Yes
- Firm Custody Clients
- Yes
- Firm Custody Securities
- Yes
- Related Person Custody Cash
- No
- Related Person Custody Assets
- No
- Related Person Custody Clients
- No
- Related Person Custody Securities
- Yes
Disclosure events
ADV Item 11This firm answered no to every Item 11 disclosure question in this filing.
Filed changes
| Date | Field | From | To | Change |
|---|---|---|---|---|
| Apr 1, 2026 | Clients | 19 | 18 | decreased by1 |
| Apr 1, 2026 | AUM | $162,912,234 | $178,078,003 | increased by$15,165,769 |
| Apr 1, 2026 | Accounts | 19 | 18 | decreased by1 |
| Dec 1, 2025 vs May 1, 2025 | Employees | 14 | 13 | decreased by1 |
| Dec 1, 2025 vs May 1, 2025 | Clients | 16 | 19 | increased by3 |
| Dec 1, 2025 vs May 1, 2025 | AUM | $145,088,497 | $162,912,234 | increased by$17,823,737 |
| Dec 1, 2025 vs May 1, 2025 | Accounts | 16 | 19 | increased by3 |
| May 1, 2025 vs Oct 1, 2022 | Employees | 16 | 14 | decreased by2 |
| May 1, 2025 vs Oct 1, 2022 | Clients | 14 | 16 | increased by2 |
| May 1, 2025 vs Oct 1, 2022 | AUM | $239,100,546 | $145,088,497 | decreased by$94,012,049 |
| May 1, 2025 vs Oct 1, 2022 | Accounts | 14 | 16 | increased by2 |
| Aug 1, 2022 | Registration | — | APPROVED |
On Form 5500, an adviser usually appears as a plan service provider (Schedule C), not the plan sponsor.
See plans that list “WATERMILL GROUP” as a service provider on 5500mcp →Matched by name only — Form ADV and Form 5500 share no identifier, and names are searched loosely (“WATERMILL GROUP” may also match similarly-named firms). Confirm identity against each filing.
Every value above is reproduced from this firm's Form ADV filing. Fields the firm left blank are shown as “Not reported” rather than filled in from other sources.