Mack & Co. Partners, Lp
- Regulatory AUM
- $549M
- Discretionary
- $549M
- Clients
- 12
- Avg AUM / client
- $45.7M
- Accounts
- 25
- Employees
- 8
AUM over time
Reported AUM from Form ADV filings, plotted by filing date · as of May 07, 2026
Who they serve
| Client type | Clients | AUM | % of AUM |
|---|---|---|---|
| Individuals (non-high net worth) | 1 | $109K | 0.02% |
| High net worth individuals | 7 | $527M | 95.9% |
| Pooled investment vehicles (non-investment companies) | 4 | $22.3M | 4.06% |
People (2)
roster as of Jul 20, 2026| Name | Role / title | Credentials | With firm since | Ownership |
|---|---|---|---|---|
| Roszell Mack | Registered representative | Oct 2023 (3y) | ||
| Richard Lewis Zack | Registered representative | Apr 2024 (2y) |
Roster from the IAPD representatives feed; ownership and acquisition dates from Form ADV Schedule A/B. "Since" is the earliest filed registration or acquisition date.
Documents (1 archived)
| Form | Period | Size | |
|---|---|---|---|
| Form ADV (full filing) | 05/07/2026 | 1.94 MB | View · PDF · Source ↗ |
Archived copies of the firm's regulatory filings, versioned by content hash.
Disciplinary disclosures
No disciplinary events reported on the firm's latest Form ADV filing.
How they charge
- • Percentage of assets under management
- • Fixed fees
- • Performance-based fees
Services
- • Portfolio management for individuals/small businesses
- • Portfolio management for pooled investment vehicles
- • Selection of other advisers
- • Other services
Custody
Reported custodians
- National Financial Services (Fidelity) $476M (87% of AUM) May 2026
- Pershing $26.9M (26% of AUM) Jul 2025
- Stifel, Nicolaus & Company, Incorporated $18.8M (18% of AUM) Jul 2025
Amounts as reported in ADV Item 5.K.(3) (custodians holding 10%+ of SMA assets).
Firm reports having custody of client funds or securities (Item 9.A).
Source
All data on this page comes from this firm's Form ADV filings, reproduced without modification. Latest filing: May 07, 2026.
View current Form ADV (SEC/IAPD) ↗