Item 4. Mine Safety Disclosure

Not applicable.

Part II

Our common stock is traded on The Nasdaq Global Select Market under the symbol “FTNT.” The following table sets forth, for the time periods indicated, the high and low closing sales price of our common stock, as reported on the Nasdaq Global Select Market.

Holders of Record

As of February 16, 2018, there were 57 holders of record of our common stock. A substantially greater number of holders of our common stock are “street name” or beneficial holders, whose shares are held by banks, brokers and other financial institutions.

Dividends

We have never declared or paid cash dividends on our capital stock. We do not anticipate paying any cash dividends in the foreseeable future. Any future determination to declare cash dividends will be made at the discretion of our board of directors and will depend on our financial condition, operating results, capital requirements, general business conditions and other factors that our board of directors may deem relevant.

Stock Performance Graph

This performance graph shall not be deemed “filed” for purposes of Section 18 of the Securities and Exchange Act of 1934 (the “Exchange Act”), or incorporated by reference into any filing of Fortinet under the Securities Act of 1933, as amended (the “Securities Act”), or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

The following graph compares the cumulative five-year total return for our common stock, the NASDAQ Composite Index and the NASDAQ Computer Index. Such returns are based on historical results and are not intended to suggest future performance. Data for the NASDAQ Composite Index and the NASDAQ Computer Index assume reinvestment of dividends. We have never declared or paid cash dividends on our capital stock, nor do we anticipate paying any such cash dividends in the foreseeable future.

COMPARISON OF CUMULATIVE TOTAL RETURN*

Among Fortinet, Inc., The NASDAQ Composite Index and

The NASDAQ Computer Index

• Assumes that $100 was invested on December 31, 2012 in stock or index, including reinvestment of dividends. Stockholder returns over the indicated period should not be considered indicative of future stockholder returns.

Sales of Unregistered Securities

None.

Purchases of Equity Securities by the Issuer and Affiliated Purchasers

Share Repurchase Program

In January 2016, our board of directors approved a Share Repurchase Program (the “Repurchase Program”), which authorized the repurchase of up to $200.0 million of our outstanding common stock through December 31, 2017. In 2016 and 2017, our board of directors approved the increases in the aggregate authorized repurchase amount under the Repurchase Program by $100.0 million and $700.0 million, respectively, bringing the total amount authorized to $1.0 billion through January 31, 2019. Under the Repurchase Program, share repurchases may be made by us from time to time in privately negotiated transactions or in open market transactions. The Repurchase Program does not require us to purchase a minimum number of shares, and may be suspended, modified or discontinued at any time without prior notice.

The following table provides information with respect to the shares of common stock we repurchased during the three months ended December 31, 2017 (in thousands, except share and per share amounts):