Our Team


B.S. – Kansas State University


Security Management Group
Dain Rauscher Wessels

Clay Brethour, CFA

President, Buffalo Funds
Porfolio Manager
Board Trustee

Clay has been an investment professional since 1992 and joined the Buffalo Funds in 2000. He previously was an equity research analyst with Security Management Group in Topeka, Kansas and a research analyst with Dain Rauscher Wessels.

At the Buffalo Funds, Clay works with equity portfolios and his focus areas include healthcare, industrial and material sciences, energy technology, and consumer discretionary sectors.

Clay received a B.S. in Finance from Kansas State University. He also holds the Chartered Financial Analyst designation.

Years of Experience

Years at Buffalo Funds


Discovery Fund

Discovery Fund

Total Assets $1.80 Billion  (12/31/19)
Expense Ratio 1.02% / 0.87%
Benchmark Morningstar U.S. Mid Growth

Manager since 2004
Growth Fund

Growth Fund

Total Assets $185.46 Million  (12/31/19)
Expense Ratio 0.92% / 0.77%
Benchmark Morningstar U.S. Growth

Manager since 2007

Recent Articles

Media coverage regarding the Portfolio Manager, Funds Managed, and the Buffalo Funds in general.

Fundamental Approach

We get to know the companies we invest in and learn how they run their business.

Top-Down & Bottom-Up

We identify Top-Down broad, secular growth trends and search for companies from the Bottom-Up.

Proprietary Philosophy

We construct our portfolios based on our own proprietary investment strategy.

Disciplined Investing

Sticking to our disciplined investment strategy ensures we maintain a consistent, balanced approach.