Our Team


M.B.A. – University of Chicago
B.B.A. – University of Toledo


BancOne Investment Advisors
Duff & Phelps

Jeff Sitzmann, CFA

Portfolio Manager

Jeff joined the Buffalo Funds in 2002 and has 36 years of professional investment experience. From 1997 to 2002, Jeff worked at BancOne Investment Advisors as a Fixed Income Analyst. From 1992 to 1997, he worked at Anthem as a Fixed Income Analyst. From 1987 to 1992, Jeff worked at Duff & Phelps as a Co-portfolio Manager and Investment Analyst.

At the Buffalo Funds, Jeff works with both equity and fixed income portfolios, and his focus areas include media, consumer staples, and industrials.

Jeff received a B.B.A. from the University of Toledo and an M.B.A. from the University of Chicago. He also holds the Chartered Financial Analyst designation.

Years of Experience

Years at Buffalo Funds


Dividend Focus Fund

Dividend Focus Fund

Total Assets $117.28 Million  (12/31/21)
Expense Ratio 0.94% / 0.79%
Benchmark Morningstar U.S. Large-Mid Cap

Manager since 2018
High Yield Fund

High Yield Fund

Total Assets $301.47 Million  (12/31/21)
Expense Ratio 1.03% / 0.87%
Benchmark ICE BofAML U.S. High Yield

Manager since 2007

Recent Articles

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

“Industry Perspectives” 4Q 2022

The market currently expects at least two more Federal Funds rate hikes in early 2023 and a high of 5-5.25%. The tight labor market could give the Fed a chance to successfully engineer a soft economic landing, allowing consumers to keep spending at reasonable levels while absorbing higher interest costs.

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Red-Hot Manager Forecasts Volatile 2023

John Kornitzer, Buffalo Flexible Income Fund portfolio manager, was recently interviewed by Investor’s Business Daily where he discusses industry trends that help identify opportunities with the potential for market outperformance.

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“Industry Perspectives” 3Q 2022

The old adage is still true that past performance is no guarantee of future results, but we can still learn lessons from past bull and bear markets and apply them to our current investment decision making.

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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.