Greatbatch, Incorporated (GB)

[buhg1b]

$197,782,000 2 1/4% CONVERTIBLE SUBORDINATED DEBENTURES
DUE 2013 AND SHARES OF COMMON STOCK ISSUABLE
UPON CONVERSION THEREOF

The Prospectus, dated June 7, 2007, as amended by the Supplement to the Prospectus dated July 12, 2007, the Second Supplement to the Prospectus dated July 20, 2007, the Third Supplement to the Prospectus dated August 15, 2007, the Fourth Supplement to the Prospectus dated September 6, 2007, the Fifth Supplement to the Prospectus dated October 12, 2007, the Sixth Supplement to the Prospectus dated November 26, 2007 and the Seventh Supplement to the Prospectus dated February 14, 2008 is hereby further supplemented as follows to restate, in its entirety, the "Selling Securityholders" section on pages 45-48 of the Prospectus.

The date of this Eighth Prospectus Supplement is March 18, 2008.
S-1

SELLING SECURITYHOLDERS

We issued the debentures to certain holders of the 2003 debentures, and additional purchasers in a private placement. Holders of the 2003 debentures exchanged $117,782,000 of the 2003 debentures for an equivalent principal amount of the debentures, and holders of the 2003 debentures and additional purchasers purchased $80,000,000 aggregate principal amount of debentures. We issued the debentures on March 28, 2007 and April 2, 2007, to persons believed to be "qualified institutional purchasers" under Rule 144A promulgated under the Securities Act, or "accredited investors" under Regulation D promulgated pursuant to the Securities Act in transactions exempt from the registration requirements of the Securities Act. Selling securityholders, including their transferees, pledgees, donees and successors, may from time to time offer and sell pursuant to this prospectus any or all of the debentures and shares of common stock into which the debentures are convertible pursuant to this prospectus or any applicable prospectus supplement.

The table below sets forth the name of each selling securityholder, the principal amount of debentures and shares of common stock beneficially owned by each selling securityholder and the number of shares of common stock issuable upon conversion of those debentures that may be offered from time to time under this prospectus by the selling securityholders named in the table.

We have prepared the table below based on information given to us by those selling securityholders who have supplied us with this information and we have not sought to verify such information. We expect that we will update this table as we receive more information from holders of the debentures who have not yet provided us with their information. We will supplement or amend this prospectus to include additional selling securityholders upon request and upon provision of all required information to us. Information concerning the selling securityholders may change from time to time and any changed information will be set forth in supplements to this prospectus if and when necessary.

Because the selling securityholders may offer all or some portion of the debentures and shares of common stock into which the debentures are convertible listed below, we have assumed for purposes of this table that the selling securityholders will sell all of the shares of common stock offered by this prospectus pursuant to this prospectus. Accordingly, we cannot estimate the amounts of debentures or shares of common stock that will be held by the selling securityholders following the consummation of any such sales. In addition, the selling securityholders listed in the table below may have acquired, sold or transferred, in transactions exempt from the registration requirements of the Securities Act, some or all of their debentures since the date on which they provided to us the information presented in the table.

The number of shares of common stock issuable upon conversion of the debentures shown in the table below assumes conversion of the full amount of debentures held by each selling securityholder. The percentage of debentures outstanding beneficially owned by each selling securityholder is based on $197,782,000 aggregate principal amount of debentures outstanding. The number of shares of common stock beneficially owned prior to the offering includes shares of common stock into which the debentures may be convertible. The number of shares of common stock that may be offered is based on a conversion rate of 28.8219 per $1,000 principal amount of debentures and a cash payment in lieu of any fractional share. The percentage of common stock outstanding beneficially owned and that may be offered by each selling securityholder is based on 22,414,920 shares of common stock outstanding on June 4, 2007. In addition, the conversion rate and, therefore, the number of shares of common stock issuable upon conversion of the debentures is subject to adjustment under certain circumstances. Accordingly, the aggregate principal amount of debentures and the number of shares of common stock into which the debentures are convertible may increase or decrease.

Based upon information provided by the selling securityholders, none of the selling securityholders nor any of their affiliates, officers, directors or principal equity holders has held any position or office or has had any material relationship with us within the past three years.

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