UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

AMENDMENT NO. 5

TO

SCHEDULE TO

Tender Offer Statement under Section 14(d)(1) or 13(e)(1)

of the Securities Exchange Act of 1934

GEHL COMPANY

(Name of Subject Company (Issuer))

Tenedor Corporation

and

Manitou BF S.A.

(Names of Filing Persons (Offerors))

Common Stock, par value $0.10 per share

(Title of Class of Securities)

368483103

(CUSIP Number of Class of Securities)

Marcel Claude Braud

Bruno Fille

Manitou BF S.A.

Tenedor Corporation

Z1 430 Route l’Aubiniere

BP 249

Ancenis Cedex, France 44158

+33 (2) 40-09-10-11

(Name, Address and Telephone Numbers of Person Authorized

to Receive Notices and Communications on Behalf of Filing Persons)

Copy to:

Ethan A. Klingsberg, Esq.

Cleary Gottlieb Steen & Hamilton LLP

One Liberty Plaza

New York, New York 10006

(212) 225-2000

CALCULATION OF FILING FEE

Check the appropriate boxes below to designate any transactions to which the statement relates:

Check the following box if the filing is a final amendment reporting the results of the tender offer:  ¨

This Amendment No. 5 to Schedule TO (this “Amendment No. 5”) amends and supplements the Tender Offer Statement, Rule 13e-3 Transaction Statement and amended Schedule 13D Beneficial Ownership Statement initially filed with the Securities and Exchange Commission on September 8, 2008 on Schedule TO, as previously amended (the “Schedule TO”). This Amendment No. 5 and the Schedule TO relate to the offer by Tenedor Corporation, a Wisconsin corporation (“Purchaser”) and a direct wholly-owned subsidiary of Manitou BF S.A., a French limited company (Société Anonyme) (“Parent”), to purchase all outstanding shares of common stock, par value $0.10 per share (the “Shares”), of Gehl Company, a Wisconsin corporation (the “Company”), at a price of $30.00 per Share, net to the seller in cash, without interest thereon and less any required withholding taxes, upon the terms and subject to the conditions set forth in the Offer to Purchase dated September 7, 2008 (the “Offer to Purchase”) and in the related Letter of Transmittal (which, together with any amendments or supplements thereto, collectively constitute the “Offer”), which are annexed to and filed with the Schedule TO as Exhibits (a)(1)(A) and (a)(1)(B), respectively.

This Amendment No. 5 and Schedule TO also relate to the Agreement and Plan of Merger, dated as of September 7, 2008, among Parent, Purchaser and the Company pursuant to which, after the completion of the Offer and the satisfaction or waiver of certain conditions, Purchaser will be merged with and into the Company and the Company will be the surviving corporation and a subsidiary of Parent.

This Amendment No. 5 is being filed on behalf of Parent and Purchaser to amend and supplement Item 11 of the Schedule TO.

Item 11 is amended and supplemented by adding a new paragraph immediately before the paragraph entitled “Antitrust” under the heading “Other Matters Relating to the Offer and the Merger—Certain Legal Matters” in the Offer to Purchase containing the following text:

“On September 22, 2008, Parent and Purchaser received written notification that the Staff of the Wisconsin Division of Securities (the “Division”) will not be recommending to the Division’s Administrator that an order be issued in accordance with Section (1)(e) of the Wisconsin Going Private Rule to disallow the Offer and the Merger. The Division’s Staff indicated it was basing its decision on the following factors: (a) the Offer Price exceeds the per Share valuation contained in two separate appraisals with accompanying analyses prepared by the independent valuation firms Duff & Phelps, LLC and Emory & Co., LLC, who determined that the fair value per Share was $17.65 and $19.79, respectively; (b) the opinion from the investment banking and valuation firm Robert W. Baird & Co., who determined on the basis of various analyses that the Offer Price for public/unaffiliated shareholders was fair from a financial point of view; (c) the terms of the Merger Agreement enable the Company Board to, prior to the Purchase Time, respond, provide information and enter into discussions with any entity/person making a bona fide Acquisition Proposal if the Company Board in good faith believes such Acquisition Proposal is, or would lead to, a Superior Proposal; (d) the Offer to Purchase disclosure materials prepared under the Exchange Act, including Rule 13e-3, distributed to the Company’s shareholders provide the disclosure required under Section (1)(b) of the Wisconsin Going Private Rule; and (e) the withdrawal and related rights under the Offer comply with Section (1)(c) of the Wisconsin Going Private Rule.”

SIGNATURE

After due inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Dated: September 23, 2008