Riverbed Technology (RVBD)

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

On October 22, 2009, Riverbed Technology, Inc. (the “Company”) issued a press release announcing the Company’s financial results for the quarter ended September 30, 2009. A copy of this press release is furnished as Exhibit 99.1 to this report.

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

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

On July 23, 2009, Riverbed Technology, Inc. (the “Company”) issued a press release announcing the Company’s financial results for the quarter ended June 30, 2009. A copy of this press release is furnished as Exhibit 99.1 to this report.

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

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

On April 23, 2009, Riverbed Technology, Inc. (the “Company”) issued a press release announcing the Company’s financial results for the quarter ended March 31, 2009. A copy of this press release is furnished as Exhibit 99.1 to this report.

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

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

On February 19, 2009, Riverbed Technology, Inc. (“Riverbed”) completed its previously announced acquisition of Mazu Networks, Inc. (“Mazu”) pursuant to the terms of the Agreement of Merger dated as of January 20, 2009 (the “Merger Agreement”) entered into by and among Riverbed, Mazu, Maple Acquisition Sub, Inc., a wholly-owned subsidiary of Riverbed (“Merger Sub”), and an agent for the stockholders of Mazu. Pursuant to the terms of the Merger Agreement: (a) Merger Sub was merged with and into Mazu (the “Merger”), with Mazu continuing as the surviving corporation and as a wholly-owned subsidiary of Riverbed; and (b) Riverbed: (i) acquired all of the outstanding securities of Mazu; (ii) made an initial payment totaling approximately $23.1 million in cash (and assumed approximately $1.9 million in liabilities); and (iii) potentially will make additional payments totaling up to $22 million in cash based on achievement of certain bookings targets for the one-year period from April 1, 2009 through March 31, 2010.

The foregoing description of the transactions consummated pursuant to the Merger Agreement does not purport to be complete and is qualified in its entirety by reference to the Merger Agreement, which is filed as Exhibit 2.1 hereto and is incorporated herein by reference.

On February 20, 2009, Riverbed issued a press release relating to the completion of the acquisition of Mazu. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

On February 18, 2009, the Board of Directors of Riverbed (the “Board”) adopted the Riverbed Technology, Inc. 2009 Inducement Equity Incentive Plan (the “Inducement Plan”). The objective of the Inducement Plan is to provide incentives to attract, retain, and motivate eligible persons whose potential contributions are important to promote Riverbed’s long-term success and the creation of stockholder value. The Inducement Plan is intended to comply with NASDAQ Rule 4350(i)(1)(A)(iv), which governs granting certain awards as a material inducement to an individual entering into employment with Riverbed. The Inducement Plan will be used to grant options to Mazu employees that are joining Riverbed following the closing of the Merger, and may be used for new hire equity grants should the Board or Compensation Committee of the Board determine to do so in the future. The foregoing description of the Inducement Plan is qualified in its entirety by reference to the Inducement Plan, which is filed as Exhibit 10.1 hereto and is incorporated herein by reference.

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

On February 3, 2009, Riverbed Technology, Inc. (the “Company”) issued a press release announcing the Company’s financial results for the quarter and year ended December 31, 2008. A copy of this press release is furnished as Exhibit 99.1 to this report.

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

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

On January 20, 2009, Riverbed Technology, Inc. (“Riverbed”), Maple Acquisition Sub, Inc., a wholly-owned subsidiary of Riverbed (“Merger Sub”), Mazu Networks, Inc. (“Mazu”), and an agent for the stockholders of Mazu, entered into an Agreement of Merger pursuant to which, upon the terms and subject to the conditions set forth therein: (a) Merger Sub will merge with and into Mazu (the “Merger”), with Mazu continuing as the surviving corporation and as a wholly-owned subsidiary of Riverbed; and (b) Riverbed will: (i) acquire all of the outstanding securities of Mazu; (ii) make payments totaling approximately $25 million in cash promptly following the closing; and (iii) potentially make payments totaling up to $22 million in cash based on achievement of certain bookings targets for the one-year period from April 1, 2009 through March 31, 2010. The closing of the Merger is subject to customary closing conditions, including approval of Mazu’s stockholders. The parties intend to consummate the Merger as soon as practicable and currently anticipate that the closing will occur before the end of the first quarter of 2009.

The press release announcing the Merger, dated January 20, 2009, is filed as Exhibit 99.1 hereto and is incorporated herein by reference.

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

Amendment and Restatement of Bylaws

On December 12, 2008, the Board of Directors of Riverbed Technology, Inc. (the “Company”) amended the Company’s Bylaws to, among other things:

The foregoing description is qualified in its entirety by reference to the Amended and Restated Bylaws, a copy of which is attached hereto as Exhibit 3.1 and incorporated herein by reference.

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

On October 23, 2008, Riverbed Technology, Inc. (the “Company”) issued a press release announcing the Company’s financial results for the quarter ended September 30, 2008. A copy of this press release is furnished as Exhibit 99.1 to this report.

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

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

On September 30, 2008, Riverbed Technology, Inc., a Delaware corporation (the “Company”), entered into a Mutual Release and Settlement Agreement (the “Settlement Agreement”) with Quantum Corporation, a Delaware corporation (“Quantum”), and certain affiliates of Quantum. Pursuant to the Settlement Agreement, the Company and Quantum agreed to jointly execute and file dismissals of patent infringement actions brought in the United States District Court for the Northern District of California involving United States Patent Nos. 7,116,249; 5,990,810; and 6,622,164 (collectively, the “Litigation Patents,” and such actions being hereinafter referred to as the “Patent Infringement Actions”).

Pursuant to the terms of the Settlement Agreement, the Company will pay Quantum a lump sum of $11 million, and the parties, on behalf of themselves and their affiliates, entered into a perpetual covenant not to sue (the “Perpetual Covenant”) the other parties, any of their respective affiliates, or, subject to certain qualifications, any of their respective resellers, customers, OEM partners or suppliers (i) alleging infringement of any patents relating to data de-duplication that a party or any of its affiliates currently owns, has the right to enforce or will acquire or have the right to enforce within five (5) years following the date of the Settlement Agreement, including the Litigation Patents (collectively, the “Subject Patents”), or (ii) challenging the validity or enforceability of any Subject Patent.

In addition to the Perpetual Covenant, the parties to the Settlement Agreement agreed, on behalf of themselves and their affiliates, for a period of three (3) years, not to file any patent infringement lawsuits against any other party to the Settlement Agreement, their affiliates, or, subject to certain qualifications, any of their respective resellers, customers, OEM partners or suppliers. In addition, the Company and Quantum released each other from any and all claims, demands, losses, liabilities and causes of action relating to the Patent Infringement Actions or any infringement of any patent based on acts occurring prior to the date of the Settlement Agreement.

On October 1, 2008, the Company and Quantum issued a joint press release announcing the settlement. A copy of such press release is filed herewith as Exhibit 99.1 and is incorporated herein by reference.

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

On July 24, 2008, Riverbed Technology, Inc. (the “Company”) issued a press release announcing the Company’s financial results for the quarter ended June 30, 2008. A copy of this press release is furnished as Exhibit 99.1 to this report.

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

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

On April 24, 2008, Riverbed Technology, Inc. (the “Company”) issued a press release announcing the Company’s financial results for the quarter ended March 31, 2008. A copy of this press release is furnished as Exhibit 99.1 to this report.

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

On April 24, 2008, the Company issued a press release announcing that its Board of Directors authorized the Company to repurchase up to $100 million of the Company’s outstanding shares of common stock. A copy of the press release is furnished herewith as Exhibit 99.1, and is incorporated herein by reference.

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

On April 3, 2008, Riverbed Technology, Inc. (the “Company”) issued a press release titled “Riverbed Technology Reports First Quarter Preliminary Results,” reporting certain preliminary financial results for the quarter ended March 31, 2008. Also on April 3, 2008, the Company held a conference call relating to these results. A copy of the unofficial transcript of the conference call is furnished herewith as Exhibit 99.1 and is incorporated herein by reference.

The conference call was broadcast live over the Internet, and a replay of the call can be accessed on our website at

http://ir.riverbed.com.

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

On April 3, 2008, Riverbed Technology, Inc. issued a press release announcing certain preliminary financial results for the quarter ended March 31, 2008. A copy of this press release is furnished as Exhibit 99.1 to this report, and is incorporated herein by reference.

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

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

Riverbed Technology, Inc. (the “Company”) has re-scheduled its 2008 Annual Meeting of Stockholders (“2008 Annual Meeting”) for Thursday, May 29, 2008 at the Courtyard by Marriott located at 299 2nd Street, San Francisco, California 94105. The record date for determining eligibility to vote at the 2008 Annual Meeting will remain April 16, 2008. The Company intends to mail the proxy statement for the 2008 Annual Meeting on or about April 24, 2008.

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

Riverbed Technology, Inc. (the “Company”) has scheduled its 2008 Annual Meeting of Stockholders (“2008 Annual Meeting”) for Wednesday, June 4, 2008 at the Courtyard by Marriott located at 299 2^nd Street, San Francisco, California 94105. The record date for determining eligibility to vote at the 2008 Annual Meeting will be April 16, 2008. The Company intends to mail the proxy statement for the 2008 Annual Meeting on or about April 25, 2008.

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: