# Frost Investment Services

Frost Investment Services is a Bank / Wealth / Trust based in San Antonio, United States.

## Overview

- **Organization type:** Bank / Wealth / Trust
- **Headquarters:** San Antonio, United States
- **Region:** North America
- **Address:** San Antonio, TX, United States
- **Founded:** 1998
- **Assets under management:** Undisclosed
- **Website:** frostbank.com
- **LinkedIn:** https://www.linkedin.com/company/frost-investment-services

## Regulatory record

- **CRD number:** 286129
- **SEC file number:** 801-108754
- **Registration status:** APPROVED
- **Latest Form ADV filing:** 2026-03-24T05:00:00.000Z
- **Reports private funds:** No
- **Private funds reported:** 0
- **IAPD record:** https://adviserinfo.sec.gov/firm/summary/286129

## About

Frost Investment Services is an SEC-registered investment adviser in San Antonio, TX, registered since 2017. The firm manages approximately $3.7 billion in regulatory assets. It has 177 employees and 111 investment advisers.

## Sectors

- Wealth Management

## People

- Tom Stringfellow — President, Frost Investment Services

## Questions

### Is Frost Investment Services an independent entity, or part of the bank?

It is a wholly owned subsidiary of Cullen/Frost Bankers and operates as the investment-adviser arm of Frost Bank. The unit runs only proprietary mutual funds and model portfolios distributed through the bank's trust and wealth-management channels. There is no outside client base independent of the bank.

### Does Frost Investment Services offer private equity or venture capital strategies?

No. The unit's product set is limited to publicly traded mutual funds — equity, fixed income, and balanced strategies — plus separate accounts for institutional trust clients. Private market vehicles are not part of the current lineup.

### Where does the capital come from?

Almost all assets come through Frost Bank's trust department, which serves high-net-worth families, endowments, and foundations across Texas. The firm does not materially source AUM from outside the Frost Bank deposit base.

### How is Frost Investment Services different from an open-architecture platform?

Most regional banks of similar size now offer third-party funds alongside or instead of in-house products. Frost has maintained a captive manufacturing model: every fund on the platform is managed internally. This keeps fees inside the parent company but limits client choice.

### Does the parent disclose AUM specifically for Frost Investment Services?

No. Cullen/Frost reports trust and brokerage assets in aggregate — approximately $45 billion as of early 2024 — but does not break out how much sits in Frost-managed proprietary vehicles versus third-party custody assets.

## Related profiles

- [Frost Investment Advisors](https://altss.com/profile/frost-investment-advisors-fia)
- [Frozen Pension Plan and Trust for the Employees of Bronxcare Health System](https://altss.com/profile/frozen-pension-plan-and-trust-for-the-employees-of-bronxcare-health-system)

---

Last updated: 2026-06-03T20:00:00.000Z

Canonical page: https://altss.com/profile/frost-investment-services

Maintained by Altss — https://altss.com — methodology: https://altss.com/methodology