ELX

Registration No. 333-133885

Registration No. 333-101657

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

POST-EFFECTIVE AMENDMENT NO. 5 TO FORM S-8 REGISTRATION STATEMENT NO. 333-133885

POST-EFFECTIVE AMENDMENT NO. 5 TO FORM S-8 REGISTRATION STATEMENT NO. 333-101657

UNDER

THE SECURITIES ACT OF 1933

EMULEX CORPORATION

(Exact Name of Registrant as Specified in Its Charter)

1320 Ridder Park Drive

San Jose, California 95131

(Address of Principal Executive Offices including Zip Code)

Registrant’s telephone number, including area code: (408) 435-7400

Aarohi Communications, Inc. 2001 Stock Option Plan

Emulex Corporation Employee Stock Option Plan

1997 Stock Option Plan for Non-Employee Directors

(Full title of the plans)

Corporation Service Company

1090 Vermont Avenue NW

Washington, D.C. 20005

Tel: (800) 222-2122

(Name and Address, Including Zip Code, and Telephone Number,

Including Area Code, of Agent for Service)

Copy To:

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definition of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. Check one:

DEREGISTRATION OF SECURITIES

This Post-Effective Amendment (this “Post-Effective Amendment”) relates to the following registration statements of Emulex Corporation (the “Registrant”) filed with the Securities and Exchange Commission (the “Commission”) on Form S-8 (the “Registration Statements”):

On May 5, 2015, pursuant to the terms of the Agreement and Plan of Merger (the “Merger Agreement”), dated as of February 25, 2015, by and among the Registrant, Avago Technologies Wireless (U.S.A.) Manufacturing Inc. (“Parent”) and Emerald Merger Sub, Inc. (“Merger Sub”), Merger Sub merged with and into the Registrant, and the Registrant became a wholly owned subsidiary of Parent (the “Merger”). As a result of the Merger, any offering pursuant to the Registration Statements has been terminated and the Registrant hereby terminates the effectiveness of the Registration Statements. In accordance with an undertaking made by the Registrant in the Registration Statements to remove from registration, by means of a post-effective amendment, any of the securities registered under each Registration Statement that remain unsold at the termination of the offerings, the Registrant hereby removes from registration the securities registered but unsold under the Registration Statements, if any.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, as amended, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this Post-Effective Amendment No. 5 to the Registration Statement on Form S-8 to be signed on its behalf by the undersigned, thereunto duly authorized in the City of San Jose, State of California, on this 5th day of May 2015.

Pursuant to the requirements of the Securities Act of 1933, this registration statement has been signed by the following persons in the capacities and on the date indicated.