EXAR Exar Corp. (delisted)

1991 Employee Stock Option Plan

1984 Incentive Stock Option Plan

1986 Directors’ Stock Option Plan

1989 Employee Stock Participation Plan

1991 Non-Employee Directors’ Stock Option Plan

1991 Stock Option Plan

1996 Non-Employee Directors’ Stock Option Plan

1997 Equity Incentive Plan

2000 Equity Incentive Plan, as Amended and Restated

Exar Corporation 2006 Equity Incentive Plan

Sipex Corporation 2006 Equity Incentive Plan

Sipex Corporation Amended and Restated 2002 Nonstatutory Stock Option Plan

Sipex Corporation 2000 Non-Qualified Stock Option Plan

Sipex Corporation 1999 Stock Plan

Sipex Corporation 1997 Stock Option Plan

Sipex Corporation Stand-Alone Option Agreements

Exar Corporation Inducement Option Agreement

Stock Options assumed under the Exar Corporation 2006 Equity Incentive Plan

Exar Corporation 2014 Equity Incentive Plan

(Full title of the plan)

Kishore Seendripu, Ph.D.

Chief Executive Officer and President

5966 La Place Court, Suite 100

Carlsbad, California

(760) 692-0711

(Name and address of agent for service) (Telephone number, including area code, of agent for service)

Copies to:

Robert F. Kornegay

Wilson Sonsini Goodrich & Rosati

Professional Corporation

12235 El Camino Real, Suite 200

San Diego, California 92130

(858) 350-2300

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

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act.  ☐

On March 28, 2017, MaxLinear, Inc., a Delaware corporation (“MaxLinear”) entered into an Agreement and Plan of Merger (the “Merger Agreement”) with the Company and MaxLinear’s wholly-owned subsidiary, Eagle Acquisition Corporation, a Delaware corporation (“Merger Sub”), providing for, among other things, the merger of Merger Sub with and into the Company (the “Merger”) with the Company continuing as the surviving entity. The Merger became effective on May 12, 2017, pursuant to a Certificate of Merger filed with the Secretary of State of the State of Delaware.

In connection with the Merger, the Company has terminated all offerings of the Company’s securities pursuant to the Registration Statements. Accordingly, pursuant to the undertaking contained in each of the Registration Statements to remove from registration, by means of a post-effective amendment, any of the securities being registered which remain unsold at the termination of the offering, the Company is filing this post-effective amendment to deregister all of such securities of the Company registered under the Registration Statements that remained unsold as of the effective time of the Merger, if any. The Company hereby removes and withdraws from registration any and all securities of the Company registered pursuant to the Registration Statements that remain unsold as of the date hereof. The Registration Statements are hereby amended, as appropriate, to reflect the deregistration of such securities.