Summa provides portfolio management for individuals and small businesses and selecting other managers.
Summa reports 88 clients. They include 48 high-net-worth individuals, 36 individual clients, and 3 corporations and other businesses. Of its assets, 88.4% ($1.4B across 77 accounts) are managed with discretion; $184M across 11 accounts are not. Of its clients, 86% are outside the U.S.
| Client type | Clients | Assets |
|---|---|---|
| Individuals (other than HNW) | 41% | 2% |
| High-net-worth individuals | 55% | 89% |
| Other investment advisers | 1% | 8% |
| Corporations and other businesses | 3% | <1% |
Client breakdown and activity details
| Client type | Clients | Regulatory AUM | AUM share | Avg. per client |
|---|---|---|---|---|
| Individuals (other than HNW) | 36 | $33.7M | 2.1% | $937K |
| High-net-worth individuals | 48 | $1.42B | 89.4% | $29.5M |
| Other investment advisers | Fewer than 5 | $126M | 7.9% | $126M |
| Corporations and other businesses | Fewer than 5 | $8.96M | 0.6% | $2.99M |
| Total | 88 | $1.59B | 100% | — |
- Clients
- 36
- Regulatory AUM
- $33.7M
- AUM share
- 2.1%
- Avg. per client
- $937K
- Clients
- 48
- Regulatory AUM
- $1.42B
- AUM share
- 89.4%
- Avg. per client
- $29.5M
- Clients
- Fewer than 5
- Regulatory AUM
- $126M
- AUM share
- 7.9%
- Avg. per client
- $126M
- Clients
- Fewer than 5
- Regulatory AUM
- $8.96M
- AUM share
- 0.6%
- Avg. per client
- $2.99M
Total
- Clients
- 88
- Regulatory AUM
- $1.59B
- AUM share
- 100%
- Avg. per client
- —
- Clients outside the U.S.
- 86%
- Clients advised without assets under management last fiscal year
- 0
- Private funds advised
- 0
Summa charges 0.75%–1.00% a year for its Advisory fee. The fee is billed in advance or in arrears. The brochure also prices one other service, listed under fee details.
Fee details and sources
Other fees
- Portfolio Consulting
- Portfolio consulting is charged a fixed fee, payable quarterly in arrears, for accounts with at least $500,000 under management.
Maria Bernaldo De Quiros owns 50% to 75% of Summa. The leadership team of Summa includes President Maria Bernaldo De Quiros. It has 5 employees, 3 of them in advisory roles.
Staff
- 5 employees
- 3 in advisory functions
- 1 broker-dealer rep
- Owns 50% to 75% of Summa Corp.
Maria Bernaldo De Quiros
Control person · since January 2001
- Owns 50% to 75% of Summa Corp.
Elalval LLC
Control person · since April 2026
- Owns 75% or more of Elalval LLC
Alonso Valenzuela Del Rio
Control person · since March 2024
Summa’s regulatory assets grew 5.7× from $277M (March 2021) to $1.59B (September 2026); clients rose from 38 to 88 and employees from 2 to 5.
Figures from each annual filing
| Filed | Regulatory AUM | Clients | StaffEmployees | Offices |
|---|---|---|---|---|
| Sep 2026September 2026 | $1.59B | 88 | 5 | 1 |
| Feb 2025February 2025 | $459M | 66 | 2 | 1 |
| Mar 2024March 2024 | $362M | 56 | 2 | 1 |
| Mar 2023March 2023 | $232M | 53 | 2 | 1 |
| Mar 2022March 2022 | $277M | 51 | 3 | 1 |
| Mar 2021March 2021 | $277M | 38 | 2 | 1 |
Besides its headquarters, Summa has 0 offices, with 1 listed address in 1 state.
Texas · 1 listed address
- 1790 Hughes Landing BLVD., Suite 470, The WoodlandsHQ
Contact and registration details
- Legal name
- Summa Corp.
- Headquarters
- 1790 Hughes Landing BLVD., Suite 470, The Woodlands, TX 77380
- Website
- summaholdings.com
- Phone
- 281-362-9977
- SEC file
- 801-107935
- Structure
- Texas corporation
- Fiscal year end
- December
Summa’s named custodians for separately managed accounts include J.P. Morgan ($437M, 34%), Goldman Sachs & Co. ($350M, 28%) and Banque Pictet & Cie Sa ($283M, 22%). Summa does not have custody of client assets.
- Interactive BrokersInteractive Brokers LLC · Greenwich, CT · $200M16%
- J.P. MorganJ.P. Morgan Securities LLC · New York, NY · $437M34%
- Goldman Sachs & Co.Goldman Sachs & Co. LLC · New York, NY · $350M28%
- Banque Pictet & Cie SaBanque Pictet & Cie Sa · Geneva · $283M22%
At year end, Summa’s separately managed accounts were mostly in stocks (62%) and bonds (19%).
What the accounts hold
- Stocks62%
- Funds5%
- Bonds19%
- Investment grade corporate bonds14%
- Sovereign bonds5%
- Cash5%
- Other9%
- Derivatives7%
- Private equity/commercial paper2%
How many clients does Summa have?
Summa has 88 clients and manages $1.59 billion for them, as of September 2026. They include 48 high-net-worth individuals, 36 individual clients, and 3 corporations and other businesses.
Source: Form ADV Part 1A, Items 5.D and 5.F, filed 17 September 2026
What services does Summa offer?
Summa provides portfolio management for individuals and small businesses and selecting other managers.
Source: Form ADV Part 1A, Item 5.G, from the SEC's 2 October 2026 data file
How much does Summa charge?
Summa charges 0.75%–1.00% a year for its Advisory fee. The fee is billed in advance or in arrears.
Source: SUMMA - FORM ADV PART 2A BROCHURE, filed 17 September 2026
Which custodians does Summa use?
Summa’s separately managed account assets are held at J.P. Morgan Securities LLC (New York, NY), with $437M, Goldman Sachs & Co. LLC (New York, NY), with $350M, Banque Pictet & Cie Sa (Geneva), with $283M and Interactive Brokers LLC (Greenwich, CT), with $200M. Only custodians holding at least a tenth of those assets are named.
Source: Form ADV Part 1A, Schedule D, Section 5.K.(3), filed 17 September 2026
How many financial advisors does Summa have?
Summa has 0 investment adviser representatives registered with state securities authorities, out of 5 employees, and 3 perform investment advisory functions. 1 employee is a registered representative of a broker-dealer and 0 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 Summa invest in?
At the end of its last fiscal year, Summa’s separately managed accounts held 62% exchange-traded equities, 14% investment grade corporate bonds, 7% derivatives, 5% sovereign bonds, 5% registered funds (mutual funds, ETFs, BDCs), 5% cash and equivalents and 2% other. The 2% other category is described as: Private Equity/Commercial Paper.
Source: Form ADV Part 1A, Items 5.K.(1) and 7.B, from the SEC's 2 October 2026 data file
Who owns Summa?
Summa is owned through a holding company by Alonso Valenzuela Del Rio. Its direct owners are Maria Bernaldo De Quiros (50% to 75%) and Elalval LLC (50% to 75%).
Source: Form ADV Part 1A, Schedules A and B, filed 17 September 2026
How does Summa get paid?
Summa is paid through a percentage of assets under management and fixed fees. 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
How do I contact Summa?
Summa’s main office is at 1790 Hughes Landing BLVD., Suite 470, The Woodlands, TX 77380. Its phone number is 281-362-9977. Its website is summaholdings.com.