Filed Pursuant to Rule 424(b)(3)
Registration No. 333-122348

Prospectus Supplement No. 2
to Prospectus Dated June 2, 2005

$125,000,000

0.75% Convertible Senior Subordinated Notes due 2024
and the Common Stock Issuable Upon Conversion of the Notes

This prospectus supplement no. 2 relates to the resale by selling securityholders of Synaptics Incorporated’s 0.75% Convertible Senior Subordinated Notes due 2024 and the shares of our common stock issuable upon conversion of the notes. You should read this prospectus supplement no. 2 in conjunction with the prospectus dated June 2, 2005, as supplemented by prospectus supplement no. 1 dated July 1, 2005. This prospectus supplement is not complete without, and may not be delivered or used except in conjunction with, the prospectus, including any amendments or supplements to it. This prospectus supplement is qualified by reference to the prospectus as supplemented to date, except to the extent that the information provided by this prospectus supplement supersedes the information contained in the prospectus as supplemented to date.

     Investing in the notes and our common stock involves significant risks. See Risk Factors beginning on page 9 of the prospectus.

     Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or passed upon the adequacy or accuracy of the prospectus or this prospectus supplement. Any representation to the contrary is a criminal offense.

This date of this prospectus supplement is July 13, 2005.

The table set forth under the caption “Selling Securityholders” beginning on page 70 of the prospectus is hereby amended and restated in its entirety as set forth below and reflects updated information as to certain selling securityholders previously listed in the prospectus and added information with respect to selling securityholders not previously listed in the prospectus. No additional notes or shares of our common stock are being offered for resale under the prospectus.

SELLING SECURITYHOLDERS

     We originally issued the notes in a private placement on December 7, 2004 and December 17, 2004, to Bear, Stearns & Co. Inc. and Credit Suisse First Boston LLC (the “initial purchasers’’). The notes were resold by the initial purchasers in transactions exempt from the registration requirements of the Securities Act. The notes and the shares of common stock issuable upon conversion of the notes that may be offered pursuant to this prospectus will be offered by the selling securityholders, which includes their transferees, distributees, pledgees or donees, or their successors.

     The following table sets forth information with respect to the selling securityholders and the principal amounts of notes beneficially owned by each such selling securityholder that may be offered pursuant to this prospectus. The information is based solely on information provided by or on behalf of the selling securityholders on or prior to July 6, 2005. The selling securityholders may offer all, some, or none of the notes or the common stock into which the notes are convertible. Because the selling securityholders may offer all or some portion of the notes or common stock, we cannot estimate the amount of the notes or the common stock that will be held by the selling securityholders upon termination of any of these sales. The percentage of notes outstanding beneficially owned by each selling securityholder is based on $125.0 million aggregate principal amount of notes outstanding. Unless set forth below, none of the selling securityholders has had a material relationship with us or any of our predecessors or affiliates within the past three years.

     Before a securityholder not named below may use this prospectus in connection with an offering of securities, this prospectus will be supplemented or amended to include the name and amount of notes and common stock beneficially owned by the selling securityholder and the amount of notes and common stock to be offered. Any prospectus supplement or post-effective amendment will also disclose whether any selling securityholder selling in connection with that prospectus supplement or post-effective amendment has held any position, office, or other material relationship with us or any of our predecessors or affiliates during the three years prior to the date of the prospectus supplement.

     The number of shares of common stock issuable upon conversion of the notes shown in the table below assumes conversion of the full amount of notes held by each selling securityholder at an initial conversion rate of 19.7918 shares of common stock per $1,000 principal amount of notes and a cash payment in lieu of any fractional shares. This conversion price is subject to adjustment in certain events. Accordingly, the number of conversion shares may increase or decrease from time to time. No selling securityholder named in the table below beneficially owns one percent or more of our common stock, based on 26,371,425 shares of common stock outstanding on March 31, 2005. Information concerning other selling securityholders will be set forth in prospectus supplements or, if appropriate, post-effective amendments to the registration statement of which this prospectus forms a part, from time to time, if required. The number of shares of common stock owned by the unnamed selling securityholders or any future transferee of any such holder assumes that they do not beneficially own any common stock other than common stock into which the notes are convertible.