Wealth manager, independent · Overland Park, KS
Mariner Independent
Mariner Platform Solutions, LLC · SEC-registered investment adviser · CRD 305418 · SEC 801-117332
At a glance
Mariner Independent is an SEC-registered investment adviser based in Overland Park, Kansas, with $7.3B in regulatory assets under management as of its Form ADV filed August 13, 2026. It reports 4,261 individual clients, 1,575 of them high-net-worth, holding an average of about $1.7 million each, and 161 employees. That ranks it 147th among the nation’s 5,657 independent wealth management RIAs and 4th of 74 in Kansas. It reports 2 custodians for its clients’ separately managed accounts: Charles Schwab and Fidelity.
Main office 913-904-5700marinerplatform.comLinkedInAs filed on Form ADV
- Regulatory AUM
- $7.3B
- Rank among independent wealth managers
- #147 of 5,657
- Rank among all SEC RIAs
- #1,645 of 17,210
- Rank in Kansas
- #4 of 74
- Individual clients
- 4,261
- High-net-worth clients
- 1,575
- Accounts
- 14,426
- Discretionary
- 90% of AUM
- Employees
- 161
- Advisory staff
- 106
- Offices
- 56
Owners and executives on its Form ADV
- Martin C. BicknellChief Executive Officer
- Anne J. DorianChief Risk Officer
- Cheryl R. BicknellChief Operating Officer
- Heather D. AugustineChief Compliance Officer
- Jeffrey A. PoeChief Financial Officer
- Robert S. SandrewNational Managing Director
- Bradley D. RollinsChief Investment Officer
Custody and brokerage
Broker-dealer
Hybrid RIA
Mariner Independent is a hybrid RIA: 1 of its employees are also registered representatives of a broker-dealer. It names affiliated broker-dealers: Msec, LLC and W G Securities, LLC.
- Msec, LLC ↗CRD 154327
An introducing broker-dealer: its trades clear through National Financial Services (Fidelity), which holds the brokerage accounts. Its annual audited report filed with the SEC, March 2026
- W G Securities, LLC ↗CRD 140869
It doesn’t hold client accounts or customer funds itself. Its annual audited report filed with the SEC, August 2026
Who it serves
| Client type | Clients | Regulatory AUM | Share |
|---|---|---|---|
| High-net-worth individuals | 1,575 | $5.9B | 81% |
| Individuals | 2,686 | $1.1B | 15% |
| Corporations or other businesses | 46 | $287M | 4% |
| Charitable organizations | – | $4M | <1% |
Disciplinary disclosures
Mariner Independent answers yes to 2 disclosure items in Item 11 of Form ADV (criminal, regulatory or civil matters involving the firm or its advisory affiliates). Read the details on the SEC’s adviser search ↗
Services
- Financial planning
- Portfolio management for individuals and small businesses
- Portfolio management for businesses and institutions
- Pension consulting
- Selecting other advisers
- Periodicals or newsletters
- Educational seminars and workshops
How it’s paid
- A percentage of assets under management
- Hourly charges
- Fixed fees
Form ADV and brochures on the SEC’s adviser search ↗marinerplatform.com ↗Mariner Independent news and profile →
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Ten years of SEC filings, its owners and contacts, and how it stacks up against its peers. Atlas members see all of it.
- Assets, accounts, clients and staff, 6 years of filings
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- Growth over one, three and five years
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- Rank against 563 peers of its type and size
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- 7 namedLocked
- Main office, fax and compliance officer
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- Filing changes this year, with alerts
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Free while Atlas launches: create a free account and confirm your email. Every figure comes from SEC filings.
Similar-size RIAs in Kansas
All of Kansas →| Firm | Regulatory AUM | Clients |
|---|---|---|
| Creative PlanningOverland Park | $296B | 87,051 |
| MarinerOverland Park | $125B | 54,583 |
| Mariner Advisor NetworkOverland Park | $9.6B | 16,100 |
| Creativeone Wealth, LLCOverland Park | $6.3B | 22,064 |
| Cetera Planning PartnersLeawood | $4.2B | 4,748 |
| FAS Wealth Partners, Inc.Leawood | $3.8B | 1,524 |
Background
Questions
How much does Mariner Independent manage?
Mariner Independent reports $7.3B in regulatory assets under management across 14,426 accounts, 90% of it on a discretionary basis, on its Form ADV filed August 13, 2026.
How many clients does Mariner Independent have?
It reports 4,261 individual clients: 1,575 high-net-worth individuals and 2,686 other individuals. Individuals account for about 96% of its regulatory assets.
Where is Mariner Independent headquartered?
Its main office is in Overland Park, Kansas. It reports 56 offices in total and 161 employees, 106 of whom perform investment advisory functions.
How does Mariner Independent charge clients?
On Form ADV it lists these forms of compensation: a percentage of assets under management; hourly charges; fixed fees. Fees and minimums are set out in its Form ADV Part 2A brochure, available on the SEC’s adviser search.
What custodian does Mariner Independent use?
It reports 2 custodians for its clients’ separately managed accounts: Charles Schwab and Fidelity. On Schedule D of its Form ADV filed August 13, 2026, it reports these amounts held: Charles Schwab ($3.8B); Fidelity ($3.5B). Form ADV lists only custodians holding 10% or more of separately managed account assets.
Is Mariner Independent a hybrid RIA with a broker-dealer?
Mariner Independent is a hybrid RIA: 1 of its employees are also registered representatives of a broker-dealer. It names affiliated broker-dealers: Msec, LLC and W G Securities, LLC. Msec, LLC clears through National Financial Services (Fidelity), according to its annual report filed with the SEC. Those representatives can also earn commissions on brokerage business through the broker-dealer, where different rules apply than for advisory accounts.
Is Mariner Independent a fiduciary?
As an SEC-registered investment adviser, Mariner Independent owes its advisory clients a fiduciary duty under the Investment Advisers Act of 1940, which includes duties of care and loyalty. 1 of its employees are also registered representatives of a broker-dealer, where different rules apply to brokerage recommendations.
Where these numbers come from
Every figure is Mariner Independent’s own answer on its latest Form ADV, from the SEC’s registered-adviser list as of October 1, 2026: regulatory assets and accounts (Item 5.F), clients by type (5.D), employees (5.A and 5.B), compensation (5.E) and services (5.G). Custodians come from Schedule D 5.K(3) of its latest filing (2026-08-13), which lists those holding 10% or more of separately managed account assets and the amount at each. “Hybrid” means some employees are also registered representatives of a broker-dealer (Item 5.B(2)); affiliated broker-dealers are the related persons it lists in Item 7.A and Schedule D. Firm type comes from its own answers: broker-dealer firms are registered broker-dealers themselves (Item 6.A); private fund advisers manage mostly private funds (Item 7.B, 5.D); wealth managers manage at least half their assets for individuals (5.D). Its national rank compares it with every US-based independent wealth management RIA, the same field as The Largest RIAs. Figures are as of the firm’s last annual update, so they can lag recent deals and market moves. Regulatory AUM counts assets the firm continuously supervises and can differ from what a firm markets.
Not an endorsement or a recommendation. Before hiring any adviser, read its Form ADV Part 2A brochure and check its record on the SEC’s adviser search. How to check a financial advisor →