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ISTHMUS PARTNERS, LLC
CRD 171279File 801-79683
APPROVED
Retail clients
Custody
Filing as of Jan 23, 2026
Feed vintage Oct 1, 2026
Regulatory AUM
$1.44B
Above cohort median (national)
Discretionary AUM
$1.36B
Non-discretionary $77.3M
Clients
381
1,894 accounts
Employees
17
Top 25% of cohort in WI
Identity & registration
ADV Item 1- Organization form
- Limited Liability Company
- Firm type
- Registered
- SEC region
- CHRO
- Registration date
- May 19, 2014
- Principal office
- 1 SOUTH PINCKNEY STREET, SUITE 800, MADISON, WI, 53703
- Phone
- 608-729-0949
Assets & accounts
ADV Item 5F- Total regulatory AUM
- $1.44B
- Discretionary AUM
- $1.36B
- Non-discretionary AUM
- $77.3M
- Discretionary accounts
- 1,504
- Non-discretionary accounts
- 390
- Total accounts
- 1,894
- AUM per client
- $3.8M
Clients by type
ADV Item 5D| Client type | Clients | AUM |
|---|---|---|
| Other | 5 | $26.1M |
| Charitable organizations | 5 | $96.4M |
| High net worth individuals | 208 | $1.14B |
| Pension and profit sharing plans | 14 | $35.7M |
| Individuals (other than high net worth individuals) | 149 | $138.0M |
Compensation & activities
ADV Items 5E, 5GCompensation
- Fixed fees
- Hourly charges
- A percentage of assets under your management
Advisory activities
- Other
- Financial planning services
- Portfolio management for businesses
- Portfolio management for individuals and/or small businesses
Custody
ADV Item 9- Firm Custody Cash
- Yes
- Firm Custody Assets
- No
- Firm Custody Clients
- No
- Firm Custody Securities
- Yes
- Related Person Custody Cash
- No
- Related Person Custody Assets
- No
- Related Person Custody Clients
- No
- Related Person Custody Securities
- No
Disclosure events
ADV Item 11This firm answered no to every Item 11 disclosure question in this filing.
Filed changes
| Date | Field | From | To | Change |
|---|---|---|---|---|
| Feb 1, 2026 | Employees | 16 | 17 | increased by1 |
| Feb 1, 2026 | Clients | 364 | 381 | increased by17 |
| Feb 1, 2026 | AUM | $1,296,248,165 | $1,438,537,516 | increased by$142,289,351 |
| Feb 1, 2026 | Accounts | 1,732 | 1,894 | increased by162 |
| May 1, 2025 vs Oct 1, 2022 | Employees | 15 | 16 | increased by1 |
| May 1, 2025 vs Oct 1, 2022 | Clients | 333 | 364 | increased by31 |
| May 1, 2025 vs Oct 1, 2022 | AUM | $952,505,865 | $1,296,248,165 | increased by$343,742,300 |
| May 1, 2025 vs Oct 1, 2022 | Accounts | 1,264 | 1,732 | increased by468 |
| Mar 1, 2022 | Employees | 14 | 15 | increased by1 |
| Mar 1, 2022 | Clients | 312 | 333 | increased by21 |
| Mar 1, 2022 | AUM | $779,624,047 | $952,505,865 | increased by$172,881,818 |
| Mar 1, 2022 | Accounts | 1,190 | 1,264 | increased by74 |
| Apr 1, 2021 | Registration | — | APPROVED |
On Form 5500, an adviser usually appears as a plan service provider (Schedule C), not the plan sponsor.
See plans that list “ISTHMUS PARTNERS” as a service provider on 5500mcp →Matched by name only — Form ADV and Form 5500 share no identifier, and names are searched loosely (“ISTHMUS PARTNERS” 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.