Cornerstone Advisors provides financial planning and portfolio management for individuals and small businesses.
Cornerstone Advisors reports 470 clients. They include 364 individual clients, 100 high-net-worth individuals, and 3 pension and profit-sharing plans. Of its assets, 90.6% ($240M across 1,016 accounts) are managed with discretion; $25M across 123 accounts are not.
| Client type | Clients | Assets |
|---|---|---|
| Individuals (other than HNW) | 77% | 30% |
| High-net-worth individuals | 21% | 70% |
| Pension and profit-sharing plans | <1% | <1% |
| Charitable organizations | <1% | <1% |
| Corporations and other businesses | <1% | <1% |
Client breakdown and activity details
| Client type | Clients | Regulatory AUM | AUM share | Avg. per client |
|---|---|---|---|---|
| Individuals (other than HNW) | 364 | $79.2M | 29.9% | $218K |
| High-net-worth individuals | 100 | $185M | 69.8% | $1.85M |
| Pension and profit-sharing plans | Fewer than 5 | $12.3K | 0.0% | $4.1K |
| Charitable organizations | Fewer than 5 | $6 | 0.0% | $6 |
| Corporations and other businesses | Fewer than 5 | $753K | 0.3% | $376K |
| Total | 470 | $265M | 100% | — |
- Clients
- 364
- Regulatory AUM
- $79.2M
- AUM share
- 29.9%
- Avg. per client
- $218K
- Clients
- 100
- Regulatory AUM
- $185M
- AUM share
- 69.8%
- Avg. per client
- $1.85M
- Clients
- Fewer than 5
- Regulatory AUM
- $12.3K
- AUM share
- 0.0%
- Avg. per client
- $4.1K
- Clients
- Fewer than 5
- Regulatory AUM
- $6
- AUM share
- 0.0%
- Avg. per client
- $6
- Clients
- Fewer than 5
- Regulatory AUM
- $753K
- AUM share
- 0.3%
- Avg. per client
- $376K
Total
- Clients
- 470
- Regulatory AUM
- $265M
- AUM share
- 100%
- Avg. per client
- —
- Clients outside the U.S.
- 0%
- Clients advised without assets under management last fiscal year
- 0
- Private funds advised
- 0
- Financial planning clients last fiscal year
- 0
Cornerstone Advisors charges up to 1.00% a year for its Investment management. The fee is billed in arrears and is negotiable. The brochure also prices 2 other services, listed under fee details.
Fee details and sources
Other fees
- Consulting (hourly)
- Hourly consulting fees range from $150 to $300, depending on the extent and complexity of the project, billed as services are rendered.
- Financial planning (hourly)
- Hourly fees for financial plans range from $150 to $300; fees are negotiable and paid in arrears on delivery of the plan.
Mark Bucholtz owns 50% to 75% of Cornerstone Advisors. The leadership team of Cornerstone Advisors includes Chief Compliance Officer Mark Bucholtz. It has 2 employees.
Leadership
- Mark BucholtzOwner, Chief Compliance Officer
- Jeffrey SorensenOwner
Investment adviser representatives
3 representatives listed in the SEC register as of 9 October 2026.
- Mark Warren Bucholtz
- Jeffrey A Sorensen
- Shawn Allan Walker
Staff
- 2 employees
- 2 in advisory functions
- 2 state-registered reps
- 2 insurance agents
- Owns 50% to 75% of Cornerstone Advisors, LLC
Mark Bucholtz
Control person · since March 2023
- Owns 50% to 75% of Cornerstone Advisors, LLC
Jeffrey Sorensen
Control person · since March 2023
Cornerstone Advisors’ regulatory assets grew from $200M (March 2021) to $265M (March 2026); clients rose from 429 to 470 and employees fell from 4 to 2.
Figures from each annual filing
| Filed | Regulatory AUM | Clients | Employees | Offices |
|---|---|---|---|---|
| March 2026 | $265M | 470 | 2 | 1 |
| March 2025 | $245M | 459 | 2 | 1 |
| March 2024 | $218M | 602 | 2 | 1 |
| August 2023 | $194M | 443 | 3 | 1 |
| March 2022 | $226M | 448 | 4 | 1 |
| March 2021 | $200M | 429 | 4 | 1 |
Besides its headquarters, Cornerstone Advisors has 0 offices, with 1 listed address in Kansas.
Kansas · 1 listed address
- 6540 SW 10th Avenue, TopekaHQ
Contact and registration details
- Legal name
- Cornerstone Advisors, LLC
- Headquarters
- 6540 SW 10th Avenue, Topeka, KS 66615
- Website
- cstonegroup.com
- Phone
- 785-273-2685
- SEC file
- 801-110649
- Structure
- Kansas LLC
- Fiscal year end
- December
Cornerstone Advisors uses Charles Schwab ($261M) as custodian for its separately managed accounts. Cornerstone Advisors has custody of $28M in client assets for 13 clients.
- Charles SchwabCharles Schwab & Co., Inc. · San Fransisco, CA · $261M100%
At year end, Cornerstone Advisors’ separately managed accounts were mostly in funds (83%).
What the accounts hold
- Stocks8%
- Funds83%
- Registered funds79%
- Pooled vehicles4%
- Cash7%
- Other2%
- Private placements2%
How many clients does Cornerstone Advisors have?
Cornerstone Advisors has 470 clients and manages $265 million for them, as of March 2026. They include 364 individual clients, 100 high-net-worth individuals, and 3 pension and profit-sharing plans.
Source: Form ADV Part 1A, Items 5.D and 5.F, filed 31 March 2026
What services does Cornerstone Advisors offer?
Cornerstone Advisors provides financial planning and portfolio management for individuals and small businesses.
Source: Form ADV Part 1A, Item 5.G, from the SEC's 2 October 2026 data file
How much does Cornerstone Advisors charge?
Cornerstone Advisors charges up to 1.00% a year for its Investment management. The fee is billed in arrears and is negotiable.
Which custodians does Cornerstone Advisors use?
Cornerstone Advisors’ separately managed account assets are held at Charles Schwab & Co., Inc. (San Fransisco, CA), with $261M. Only custodians holding at least a tenth of those assets are named.
Source: Form ADV Part 1A, Schedule D, Section 5.K.(3), filed 31 March 2026
How many financial advisors does Cornerstone Advisors have?
Cornerstone Advisors has 2 investment adviser representatives registered with state securities authorities, out of 2 employees, and 2 perform investment advisory functions. 0 employees are registered representatives of a broker-dealer and 2 employees are licensed insurance agents.
Source: Form ADV Part 1A, Items 5.A and 5.B, from the SEC's 2 October 2026 data file
What does Cornerstone Advisors invest in?
At the end of its last fiscal year, Cornerstone Advisors’ separately managed accounts held 79% registered funds (mutual funds, ETFs, BDCs), 8% exchange-traded equities, 7% cash and equivalents, 4% pooled vehicles (private funds and similar) and 2% other. The 2% other category is described as: Private Placements.
Source: Form ADV Part 1A, Items 5.K.(1) and 7.B, from the SEC's 2 October 2026 data file
Who owns Cornerstone Advisors?
Cornerstone Advisors’ direct owners are Mark Bucholtz (50% to 75%) and Jeffrey Sorensen (50% to 75%).
Source: Form ADV Part 1A, Schedules A and B, filed 31 March 2026
How does Cornerstone Advisors get paid?
Cornerstone Advisors is paid through a percentage of assets under management and hourly charges. Its Form ADV lists no commissions or performance-based fees among how it is paid.
Source: Form ADV Part 1A, Item 5.E, from the SEC's 2 October 2026 data file
Is Cornerstone Advisors registered with the SEC?
Yes, Cornerstone Advisors has been registered with the SEC as an investment adviser since 23 June 2017. Its CRD number is 114510 and its SEC file number is 801-110649.
Source: Form ADV Part 1A, Item 1, filed 31 March 2026; IAPD firm record
How do I contact Cornerstone Advisors?
Cornerstone Advisors’ main office is at 6540 SW 10th Avenue, Topeka, KS 66615. Its phone number is 785-273-2685. Its website is cstonegroup.com.