Riverbed Technology (RVBD)

Registration Rights

As of December 31, 2006, holders of approximately 39,538,961 shares of common stock and the holders of warrants to purchase 32,967 shares of our common stock will be entitled to rights with respect to the registration of those shares under the Securities Act. Under the terms of the amended and restated investors’ rights agreement between us and the holders of these registrable securities, if we propose to register any of our securities under the Securities Act, either for our own account or for the account of other security holders exercising registration rights, these holders are entitled to notice of registration and are entitled to include their shares of common stock in the registration. Certain of the holders of the registrable securities are also entitled to specified demand registration rights under which they may require us to file a registration statement under the Securities Act at our expense with respect to our shares of common stock, and we are required to use our commercially reasonable efforts to effect this registration. Further, the holders of these registrable securities may require us to file additional registration statements on Form S-3. All of these registration rights are subject to conditions and limitations, among them the right of the underwriters of an offering to limit the number of shares included in the registration and our right not to effect a requested registration within six months following the initial offering of our securities.