Siebert Advisornxt, Llc.
SEC-registered
Wealth Manager · Small ($100M–$1B)
CRD 288572
· SEC file 801-110718
· New York, NY
· www.SiebertNXT.COM
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ADV data as of Mar 25, 2026
- Regulatory AUM
- $392M
- Discretionary
- $0
- Clients
- 973
- Avg AUM / client
- $402K
- Accounts
- 973
- Employees
- 43
AUM over time
$48.1M
$392M
Nov 6, 2017
Mar 25, 2026
Reported AUM from Form ADV filings, plotted by filing date · as of Mar 25, 2026
Who they serve
| Client type | Clients | AUM | % of AUM |
|---|---|---|---|
| Individuals (non-high net worth) | 880 | $209M | 53.3% |
| High net worth individuals | 93 | $183M | 46.7% |
People (42)
roster as of Jul 20, 2026| Name | Role / title | Credentials | With firm since | Ownership |
|---|---|---|---|---|
| Mark Peter Malek | Chief Investment Officer | May 2017 (9y) | Less than 5% | |
| Peter James Sosnowski | Ceo/Chief Operating Officer | Nov 2017 (9y) | Less than 5% | |
| Reich, Andrew, Henry | Chief Financial Officer | Mar 2018 (8y) | Less than 5% | |
| Barbara Dunne Villella | Cco & Amlco | Mar 2021 (5y) | Less than 5% | |
| David Alan Bender | Registered representative | Oct 2017 (9y) | ||
| Mario Guiseppe Didomenico | Registered representative | Nov 2017 (9y) | ||
| Bradley W Poock | Registered representative | Mar 2018 (8y) | ||
| Angelo Guerriero | Registered representative | Mar 2018 (8y) | ||
| Bruce Arthur Galbraith | Registered representative | Apr 2018 (8y) | ||
| Kamyar Kashfi | Registered representative | Apr 2018 (8y) | ||
| Rita Diana Schwartz | Registered representative | Apr 2018 (8y) | ||
| Sarah Lin Braddock | Registered representative | Apr 2018 (8y) | ||
| Gary Jason Gonzalez | Registered representative | Apr 2018 (8y) | ||
| Gustav Maris Langford | Registered representative | Apr 2018 (8y) | ||
| Michael Dennis Travis | Registered representative | Apr 2018 (8y) | ||
| Michael Vanni | Registered representative | Jul 2018 (8y) | ||
| Andrew Gordon Mcdonald | Registered representative | Jul 2018 (8y) | ||
| Rodney John Carrasquillo | Registered representative | Aug 2018 (8y) | ||
| James Wesley Latimer | Registered representative | May 2019 (7y) | ||
| Dean Christopher Bantis | Registered representative | Sep 2019 (7y) | ||
| Peter Edward Cunningham | Registered representative | Nov 2019 (7y) | ||
| Michael Jonathan Colombino | Registered representative | Aug 2020 (6y) | ||
| Lucky Radley | Registered representative | Sep 2020 (6y) | ||
| Marvin Dimas Rivas | Registered representative | Sep 2021 (5y) | ||
| Alec Joseph Stevenson | Registered representative | Oct 2021 (5y) | ||
| Colin Mc Donald | Registered representative | Apr 2022 (4y) | ||
| Jacqueline Barbara Yapp | Registered representative | CFP | Jul 2022 (4y) | |
| Albert Francis Dipippo | Registered representative | Mar 2023 (3y) | ||
| Natasha S Howe | Registered representative | Nov 2023 (3y) | ||
| Ronald James Roberts | Registered representative | Aug 2024 (2y) | ||
| Monte Traficante | Registered representative | Jan 2025 (2y) | ||
| Colette Erasmus | Registered representative | Apr 2025 (1y) | ||
| Kevin Steve Ocana | Registered representative | Apr 2025 (1y) | ||
| Kyle Edwin Gonzalez | Registered representative | May 2025 (1y) | ||
| Zachary Urban Banks | Registered representative | May 2025 (1y) | ||
| Bo John Calvert | Registered representative | Oct 2025 (1y) | ||
| Antonio Speciale | Registered representative | Oct 2025 (1y) | ||
| Bruce Arthur Galbraith | Registered representative | Mar 2026 (0y) | ||
| John Donald Moran | Registered representative | Mar 2026 (0y) | ||
| Brett Andrew Sonzogni | Registered representative | Apr 2026 (0y) | ||
| Donato Joseph Cuttone | Registered representative | Apr 2026 (0y) | ||
| Enlai Zhang | Registered representative | Jun 2026 (0y) |
Entity owners (Schedule A/B)
| Entity | Title / status | Since | Sch. | Ownership |
|---|---|---|---|---|
| Siebert Financial Corporation | Public Holding Company | Nov 1996 | A | 75% or more |
Undisclosed: 0% – 25% of the firm is not attributable from the filed Schedule A bands.
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) | 03/25/2026 | 1.03 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
Services
- • Portfolio management for individuals/small businesses
- • Other services
Custody
Firm reports it does not have custody of client funds or securities (Item 9.A).
No custodian data reported or mined yet.
Source
All data on this page comes from this firm's Form ADV filings, reproduced without modification. Latest filing: Mar 25, 2026.
View current Form ADV (SEC/IAPD) ↗