You are leaving the Buffalo Funds website and entering a third-party website. The Fund is not responsible for, nor can guarantee the accuracy of, any information contained on a third-party website.

References to other mutual funds should not to be considered an offer to buy or sell these securities.

Performance data quoted represents past performance and does not guarantee future results. The investment return and principal value of an investment will fluctuate so that an investor’s shares, when redeemed, may be worth more or less than their original cost. Current performance may be lower or higher than the performance quoted. Standardized performance can be obtained here.

A complete list of the Fund’s holdings can be found here. Fund holdings are subject to change and should not be considered a recommendation to buy or sell any security.

The S&P 500 is a capitalization weighted index of 500 large capitalization stocks which is designed to measure broad domestic securities markets. The Russell 2000 Growth Index is an unmanaged index that measures the performance of those Russell 2000 Index companies with higher price-to-book ratios and higher forecasted growth values. It is not possible to invest directly in an index. Each Morningstar category average represents a universe of funds with similar objectives.

The Morningstar Rating™ for funds, or “star rating”, is calculated for managed products (including mutual funds, variable annuity and variable life subaccounts, exchange-traded funds, closed-end funds, and separate accounts) with at least a three-year history. Exchange-traded funds and open-ended mutual funds are considered a single population for comparative purposes. It is calculated based on a Morningstar Risk-Adjusted Return measure that accounts for variation in a managed product’s monthly excess performance, placing more emphasis on downward variations and rewarding consistent performance. The top 10% of products in each product category receive 5 stars, the next 22.5% receive 4 stars, the next 35% receive 3 stars, the next 22.5% receive 2 stars, and the bottom 10% receive 1 star. The Overall Morningstar Rating™ for a managed product is derived from a weighted average of the performance figures associated with its three-, five-, and 10-year (if applicable) Morningstar Rating™ metrics. The weights are: 100% three-year rating for 36-59 months of total returns, 60% five-year rating/40% three-year rating for 60-119 months of total returns, and 50% 10-year rating/30% five-year rating/20% three-year rating for 120 or more months of total returns. While the 10-year overall star rating formula seems to give the most weight to the 10-year period, the most recent three-year period actually has the greatest impact because it is included in all three rating periods. The Buffalo Emerging Opportunities Fund received 4 stars among 585 for the three-year, 1 stars among 516 for the five-year, and 5 stars among 389 Small Growth funds for the ten-year period ending 1/31/19.

You are leaving the Buffalo Funds website and entering a third-party website. The Fund is not responsible for, nor can guarantee the accuracy of, any information contained on a third-party website.

You are leaving the Buffalo Funds website and entering a third-party website. The Fund is not responsible for, nor can guarantee the accuracy of, any information contained on a third-party website.

Opinions expressed are subject to change, are not intended to be a forecast of future events, a guarantee of future results, nor investment advice.

A complete list of the fund’s holdings can be found here. Fund holdings are subject to change and should not be considered a recommendation to buy or sell any security.

You are leaving the Buffalo Funds website and entering a third-party website. The Fund is not responsible for, nor can guarantee the accuracy of, any information contained on a third-party website.

Opinions expressed are subject to change, are not intended to be a forecast of future events, a guarantee of future results, nor
investment advice.

You are leaving the Buffalo Funds website and entering a third-party website. The Fund is not responsible for, nor can guarantee the accuracy of, any information contained on a third-party website.

Opinions expressed are subject to change, are not intended to be a forecast of future events, a guarantee of future results, nor
investment advice.

As of 12/31/2017, one Euro (€) equaled 1.2006 U.S. dollars (USD).

You are leaving the Buffalo Funds website and entering a third-party website. The Fund is not responsible for, nor can guarantee the accuracy of, any information contained on a third-party website.

You are leaving the Buffalo Funds website and entering a third-party website. The Fund is not responsible for, nor can guarantee the accuracy of, any information contained on a third-party website.

References to other mutual funds should not to be considered an offer to buy or sell these securities.

Performance data quoted represents past performance and does not guarantee future results. The investment return and principal value of an investment will fluctuate so that an investor’s shares, when redeemed, may be worth more or less than their original cost. Current performance may be lower or higher than the performance quoted. Standardized performance can be obtained here.

A complete list of the Fund’s holdings can be found here. Fund holdings are subject to change and should not be considered a recommendation to buy or sell any security.

You are leaving the Buffalo Funds website and entering a third-party website. The Fund is not responsible for, nor can guarantee the accuracy of, any information contained on a third-party website.

You are leaving the Buffalo Funds website and entering a third-party website. The Fund is not responsible for, nor can guarantee the accuracy of, any information contained on a third-party website.

References to other mutual funds should not to be considered an offer to buy or sell these securities.

Performance data quoted represents past performance and does not guarantee future results. The investment return and principal value of an investment will fluctuate so that an investor’s shares, when redeemed, may be worth more or less than their original cost. Current performance may be lower or higher than the performance quoted. Standardized performance can be obtained here.

A complete list of the Fund’s holdings can be found here. Fund holdings are subject to change and should not be considered a recommendation to buy or sell any security.

The Russell 2000 is an unmanaged index that consists of the smallest 2,000 securities in the Russell 3000 Index, representing approximately 10% of the Russell 3000 total market capitalization. The S&P Small Cap 600 is an unmanaged index that consists of 600 domestic stocks chosen for market size, liquidity, bid-asked spread, ownership, share turnover and number of no-trade days and industry group representation. The S&P 500 is a capitalization weighted index of 500 large capitalization stocks which is designed to measure broad domestic securities markets. It is not possible to invest directly in an index. Each Morningstar category average represents a universe of funds with similar objectives.

3 Star Overall Morningstar Rating™ out of 606 Small Growth funds as of 6/30/18 (derived from a weighted average of the fund’s three-, five-, and ten-year risk adjusted return measure). The Buffalo Small Cap Fund received 4 stars among 606 for the three-year, 2 stars among 534 for the five-year, and 4 stars among 404 Small Growth funds for the ten-year period ending 6/30/18. The Morningstar Rating™ for funds, or “star rating”, is calculated for managed products (including mutual funds, variable annuity and variable life subaccounts, exchange-traded funds, closed-end funds, and separate accounts) with at least a three-year history. Exchange-traded funds and open-ended mutual funds are considered a single population for comparative purposes. It is calculated based on a Morningstar Risk-Adjusted Return measure that accounts for variation in a managed product’s monthly excess performance, placing more emphasis on downward variations and rewarding consistent performance. The top 10% of products in each product category receive 5 stars, the next 22.5% receive 4 stars, the next 35% receive 3 stars, the next 22.5% receive 2 stars, and the bottom 10% receive 1 star. The Overall Morningstar Rating™ for a managed product is derived from a weighted average of the performance figures associated with its three-, five-, and 10-year (if applicable) Morningstar Rating™ metrics. The weights are: 100% three-year rating for 36-59 months of total returns, 60% five-year rating/40% three-year rating for 60-119 months of total returns, and 50% 10-year rating/30% five-year rating/20% three-year rating for 120 or more months of total returns. While the 10-year overall star rating formula seems to give the most weight to the 10-year period, the most recent three-year period actually has the greatest impact because it is included in all three rating periods. ©2018 Morningstar, Inc. All Rights Reserved. The information contained herein: (1) is proprietary to Morningstar; (2) may not be copied or distributed; and (3) is not warranted to be accurate, complete or timely. Neither Morningstar nor its content providers are responsible for any damages or losses arising from any use of this information. Past performance is no guarantee of future results.

You are leaving the Buffalo Funds website and entering a third-party website. The Fund is not responsible for, nor can guarantee the accuracy of, any information contained on a third-party website.

References to other mutual funds should not to be considered an offer to buy or sell these securities.

Performance data quoted represents past performance and does not guarantee future results. The investment return and principal value of an investment will fluctuate so that an investor’s shares, when redeemed, may be worth more or less than their original cost. Current performance may be lower or higher than the performance quoted. Standardized performance can be obtained here.

A complete list of the Fund’s holdings can be found here. Fund holdings are subject to change and should not be considered a recommendation to buy or sell any security.

The S&P 500 is a capitalization weighted index of 500 large capitalization stocks which is designed to measure broad domestic securities markets. The Russell 3000 Index is a market capitalization weighted equity index maintained by the Russell Investment Group that seeks to be a benchmark of the entire U.S. stock market, encompassing the 3,000 largest U.S.-traded stocks, in which the underlying companies are all incorporated in the U.S. It is not possible to invest directly in an index.

You are leaving the Buffalo Funds website and entering a third-party website. The Fund is not responsible for, nor can guarantee the accuracy of, any information contained on a third-party website.

References to other mutual funds should not to be considered an offer to buy or sell these securities.

Performance data quoted represents past performance and does not guarantee future results. The investment return and principal value of an investment will fluctuate so that an investor’s shares, when redeemed, may be worth more or less than their original cost. Current performance may be lower or higher than the performance quoted. Standardized performance can be obtained here.

A complete list of the Fund’s holdings can be found here. Fund holdings are subject to change and should not be considered a recommendation to buy or sell any security.

The Russel Midcap Growth Index an unmanaged index that measures the performance of those Russell Midcap companies with higher price-to-book ratios and higher forecasted growth values. It is not possible to invest directly in an index. Each Morningstar category average represents a universe of funds with similar objectives.

5 Star Overall Morningstar Rating™ out of 549, 4 stars among 549 for the three-year, 5 stars among 485 for the five-year, and 5 stars among 352 for 10-year Midcap Growth funds as of 3/31/18 (derived from a weighted average of the fund’s 3-, 5-, and 10-year risk adjusted return measure). The Morningstar Rating™ for funds, or “star rating”, is calculated for managed products (including mutual funds, variable annuity and variable life subaccounts, exchange-traded funds, closed-end funds, and separate accounts) with at least a three-year history. Exchange-traded funds and open-ended mutual funds are considered a single population for comparative purposes. It is calculated based on a Morningstar Risk-Adjusted Return measure that accounts for variation in a managed product’s monthly excess performance, placing more emphasis on downward variations and rewarding consistent performance. The top 10% of products in each product category receive 5 stars, the next 22.5% receive 4 stars, the next 35% receive 3 stars, the next 22.5% receive 2 stars, and the bottom 10% receive 1 star. The Overall Morningstar Rating™ for a managed product is derived from a weighted average of the performance figures associated with its three-, five-, and 10-year (if applicable) Morningstar Rating™ metrics. The weights are: 100% three-year rating for 36-59 months of total returns, 60% five-year rating/40% three-year rating for 60-119 months of total returns, and 50% 10-year rating/30% five-year rating/20% three-year rating for 120 or more months of total returns. While the 10-year overall star rating formula seems to give the most weight to the 10-year period, the most recent three-year period actually has the greatest impact because it is included in all three rating periods.

You are leaving the Buffalo Funds website and entering a third-party website. The Fund is not responsible for, nor can guarantee the accuracy of, any information contained on a third-party website.

You are leaving the Buffalo Funds website and entering a third-party website. The Fund is not responsible for, nor can guarantee the accuracy of, any information contained on a third-party website.

References to other mutual funds should not to be considered an offer to buy or sell these securities.

Performance data quoted represents past performance and does not guarantee future results. The investment return and principal value of an investment will fluctuate so that an investor’s shares, when redeemed, may be worth more or less than their original cost. Current performance may be lower or higher than the performance quoted. Standardized performance can be obtained here.

A complete list of the Fund’s holdings can be found here. Fund holdings are subject to change and should not be considered a recommendation to buy or sell any security.

The S&P 500 Index is a free-float, capitalization-weighted index published since 1957 of the prices of 500 large-cap common stocks actively traded in the United States. It is not possible to invest directly in an index.

You are leaving the Buffalo Funds website and entering a third-party website. The Fund is not responsible for, nor can guarantee the accuracy of, any information contained on a third-party website.

Performance data quoted represents past performance and does not guarantee future results. The investment return and principal value of an investment will fluctuate so that an investor’s shares, when redeemed, may be worth more or less than their original cost. Current performance may be lower or higher than the performance quoted. Standardized performance can be obtained here.

You are leaving the Buffalo Funds website and entering a third-party website. The Fund is not responsible for, nor can guarantee the accuracy of, any information contained on a third-party website.

References to other mutual funds should not to be considered an offer to buy or sell these securities.

Performance data quoted represents past performance and does not guarantee future results. The investment return and principal value of an investment will fluctuate so that an investor’s shares, when redeemed, may be worth more or less than their original cost. Current performance may be lower or higher than the performance quoted. Standardized performance can be obtained here.

A complete list of the Fund’s holdings can be found here. Fund holdings are subject to change and should not be considered a recommendation to buy or sell any security.

The S&P 500 Index is a free-float, capitalization-weighted index published since 1957 of the prices of 500 large-cap common stocks actively traded in the United States. It is not possible to invest directly in an index. “Price-Earnings Ratio or P/E Ratio” is a ratio for valuing a company that measures its current share price relative to its per-share earnings.

You are leaving the Buffalo Funds website and entering a third-party website. The Fund is not responsible for, nor can guarantee the accuracy of, any information contained on a third-party website.

References to other mutual funds should not to be considered an offer to buy or sell these securities.

Performance data quoted represents past performance and does not guarantee future results. The investment return and principal value of an investment will fluctuate so that an investor’s shares, when redeemed, may be worth more or less than their original cost. Current performance may be lower or higher than the performance quoted. Standardized performance can be obtained here.

A complete list of the Fund’s holdings can be found here. Fund holdings are subject to change and should not be considered a recommendation to buy or sell any security.

You are leaving the Buffalo Funds website and entering a third-party website. The Fund is not responsible for, nor can guarantee the accuracy of, any information contained on a third-party website.

Annualized Performance (%)

Expense ratio 1.05%. Average annual total return represents past performance and is no guarantee of future results. Investment return and principal value will fluctuate and redemption value may be more or less than original cost. Fund performance current to the most recent month-end may be lower or higher than the performance quoted. Click here for month-end performance.

References to other mutual funds should not to be considered an offer to buy or sell these securities.

The Russell Global ex-US Index is an unmanaged index that measures the performance of the global equity market based on all investable equity securities, excluding companies assigned to the United States. The Lipper International Fund Index measures the performance of the 30 largest mutual funds in the international equity fund objective, as determined by Lipper, Inc. The Morningstar category average represents a universe of funds with similar objectives. The MSCI World Index is a broad global equity benchmark that represents large and mid-cap equity performance across 23 developed markets countries. It is not possible to invest directly in an index. Return on equity (ROE) is the amount of net income returned as a percentage of shareholders equity, and typically measures a corporation’s profitability by revealing how much profit a company generates with the money shareholders have invested. A complete list of the Fund’s holdings can be found here. Fund holdings are subject to change and should not be considered a recommendation to buy or sell any security.

You are leaving the Buffalo Funds website and entering a third-party website. The Fund is not responsible for, nor can guarantee the accuracy of, any information contained on a third-party website.

Annualized Performance (%)

Expense ratio 1.03%. Average annual total return represents past performance and is no guarantee of future results. Investment return and principal value will fluctuate and redemption value may be more or less than original cost. Fund performance current to the most recent month-end may be lower or higher than the performance quoted. Click here for month-end performance. Standardized performance can be obtained here.

References to other mutual funds should not to be considered an offer to buy or sell these securities.The S&P 500 Index is a free-float, capitalization-weighted index published since 1957 of the prices of 500 large-cap common stocks actively traded in the United States. It is not possible to invest directly in an index. EPS Growth or earnings per share growth is defined as the percentage change in normalized earnings per share over the previous 12 month period to the latest year end. Cash Flow is a measure of the cash produced by the firm in a given period on behalf of equity holders. The true measure of the value of a firm’s equity is considered to be the present value of all free cash flows. A complete list of the Fund’s holdings can be found here. Fund holdings are subject to change and should not be considered a recommendation to buy or sell any security.

You are leaving the Buffalo Funds website and entering a third-party website. The Fund is not responsible for, nor can guarantee the accuracy of, any information contained on a third-party website.

You are leaving the Buffalo Funds website and entering a third-party website. The Fund is not responsible for, nor can guarantee the accuracy of, any information contained on a third-party website.

References to other mutual funds should not to be considered an offer to buy or sell these securities.

You are leaving the Buffalo Funds website and entering a third-party website. The Fund is not responsible for, nor can guarantee the accuracy of, any information contained on a third-party website.

References to other mutual funds should not to be considered an offer to buy or sell these securities.

You are leaving the Buffalo Funds website and entering a third-party website. The Fund is not responsible for, nor can guarantee the accuracy of, any information contained on a third-party website.

References to other mutual funds should not to be considered an offer to buy or sell these securities.

You are leaving the Buffalo Funds website and entering a third-party website. The Fund is not responsible for, nor can guarantee the accuracy of, any information contained on a third-party website.

References to other mutual funds should not to be considered an offer to buy or sell these securities.

Performance data quoted represents past performance and does not guarantee future results. The investment return and principal value of an investment will fluctuate so that an investor’s shares, when redeemed, may be worth more or less than their original cost. Current performance may be lower or higher than the performance quoted. Standardized performance can be obtained here.

A complete list of the Fund’s holdings can be found here. Fund holdings are subject to change and should not be considered a recommendation to buy or sell any security.

You are leaving the Buffalo Funds website and entering a third-party website. The Fund is not responsible for, nor can guarantee the accuracy of, any information contained on a third-party website.

References to other mutual funds should not to be considered an offer to buy or sell these securities.

Performance data quoted represents past performance and does not guarantee future results. The investment return and principal value of an investment will fluctuate so that an investor’s shares, when redeemed, may be worth more or less than their original cost. Current performance may be lower or higher than the performance quoted. Standardized performance can be obtained here.

A complete list of the Fund’s holdings can be found here. Fund holdings are subject to change and should not be considered a recommendation to buy or sell any security.

You are leaving the Buffalo Funds website and entering a third-party website. The Fund is not responsible for, nor can guarantee the accuracy of, any information contained on a third-party website.

Each fund listed in the article has earned a Zacks Mutual Fund Rank #1 (Strong Buy), and Zacks believes the funds are expected to outperform its peers in the future. The Zacks Mutual Fund Rank ranks funds on a scale from 1 to 5, with 1 being a Strong Buy and 5 being a Strong Sell. Each quarter, Zacks updates their Mutual Fund Rank by evaluating the average Zacks Rank for the stocks owned by the fund and blending this with other criteria their studies show is beneficial in finding funds that will outperform in the future. In general, the higher the average Zacks Rank for the stocks in the fund, then the higher the Zacks Mutual Fund Rank.

References to other mutual funds should not to be considered an offer to buy or sell these securities.

Performance data quoted represents past performance and does not guarantee future results. The investment return and principal value of an investment will fluctuate so that an investor’s shares, when redeemed, may be worth more or less than their original cost. Current performance may be lower or higher than the performance quoted. Standardized performance can be obtained here.

A complete list of the Fund’s holdings can be found here. Fund holdings are subject to change and should not be considered a recommendation to buy or sell any security.

You are leaving the Buffalo Funds website and entering a third-party website. The Fund is not responsible for, nor can guarantee the accuracy of, any information contained on a third-party website.

Each fund listed in the article has earned a Zacks Mutual Fund Rank #1 (Strong Buy), and Zacks believes the funds are expected to outperform its peers in the future. The Zacks Mutual Fund Rank ranks funds on a scale from 1 to 5, with 1 being a Strong Buy and 5 being a Strong Sell. Each quarter, Zacks updates their Mutual Fund Rank by evaluating the average Zacks Rank for the stocks owned by the fund and blending this with other criteria their studies show is beneficial in finding funds that will outperform in the future. In general, the higher the average Zacks Rank for the stocks in the fund, then the higher the Zacks Mutual Fund Rank.

References to other mutual funds should not to be considered an offer to buy or sell these securities.

Performance data quoted represents past performance and does not guarantee future results. The investment return and principal value of an investment will fluctuate so that an investor’s shares, when redeemed, may be worth more or less than their original cost. Current performance may be lower or higher than the performance quoted. Standardized performance can be obtained here.

A complete list of the Fund’s holdings can be found here. Fund holdings are subject to change and should not be considered a recommendation to buy or sell any security.

You are leaving the Buffalo Funds website and entering a third-party website. The Fund is not responsible for, nor can guarantee the accuracy of, any information contained on a third-party website.

You are leaving the Buffalo Funds website and entering a third-party website. The Fund is not responsible for, nor can guarantee the accuracy of, any information contained on a third-party website.

You are leaving the Buffalo Funds website and entering a third-party website. The Fund is not responsible for, nor can guarantee the accuracy of, any information contained on a third-party website.

You are leaving the Buffalo Funds website and entering a third-party website. The Fund is not responsible for, nor can guarantee the accuracy of, any information contained on a third-party website.

You are leaving the Buffalo Funds website and entering a third-party website. The Fund is not responsible for, nor can guarantee the accuracy of, any information contained on a third-party website.

You are leaving the Buffalo Funds website and entering a third-party website. The Fund is not responsible for, nor can guarantee the accuracy of, any information contained on a third-party website.

You are leaving the Buffalo Funds website and entering a third-party website. The Fund is not responsible for, nor can guarantee the accuracy of, any information contained on a third-party website.

You are leaving the Buffalo Funds website and entering a third-party website. The Fund is not responsible for, nor can guarantee the accuracy of, any information contained on a third-party website.

You are leaving the Buffalo Funds website and entering a third-party website. The Fund is not responsible for, nor can guarantee the accuracy of, any information contained on a third-party website.

You are leaving the Buffalo Funds website and entering a third-party website. The Fund is not responsible for, nor can guarantee the accuracy of, any information contained on a third-party website.

You are leaving the Buffalo Funds website and entering a third-party website. The Fund is not responsible for, nor can guarantee the accuracy of, any information contained on a third-party website.

You are leaving the Buffalo Funds website and entering a third-party website. The Fund is not responsible for, nor can guarantee the accuracy of, any information contained on a third-party website.

You are leaving the Buffalo Funds website and entering a third-party website. The Fund is not responsible for, nor can guarantee the accuracy of, any information contained on a third-party website.

You are leaving the Buffalo Funds website and entering a third-party website. The Fund is not responsible for, nor can guarantee the accuracy of, any information contained on a third-party website.

You are leaving the Buffalo Funds website and entering a third-party website. The Fund is not responsible for, nor can guarantee the accuracy of, any information contained on a third-party website.

You are leaving the Buffalo Funds website and entering the Kornitzer Capital Management, Inc. website.