UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(D)

OF THE SECURITIES EXCHANGE ACT OF 1934

Date of report (Date of earliest event reported): October 17, 2016

BIODEL INC.

(Exact name of registrant as specified in its charter)

(203) 796-5000

(Registrant’s telephone number, including area code)

Not Applicable

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

As previously announced, Biodel Inc. (“Biodel” or “the Company”) has entered into an amended and restated share exchange agreement (the “Exchange Agreement”) with Albireo Limited, a company registered in England and Wales (“Albireo”), and the holders of Albireo shares or notes convertible into Albireo shares, pursuant to which, subject to the satisfaction or waiver of the conditions set forth in the Exchange Agreement, the Company will acquire the entire issued share capital of Albireo in exchange for newly issued shares of the Company’s common stock.

On October 17, 2016, the Company issued a press release announcing that two leading proxy voting advisory firms, Institutional Shareholder Services, Inc. (ISS) and Glass, Lewis & Co., have recommended that Biodel stockholders vote “FOR” each of the proposals to be voted on at Biodel’s 2016 Annual Meeting of Stockholders scheduled for October 24, 2016, including a proposal for the issuance of Biodel’s common stock in the proposed transaction with Albireo pursuant to the Exchange Agreement.

The information in this Item 7.01 and Exhibit 99.1 referenced herein shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such a filing. By furnishing the information in this Item 7.01 of this Current Report on Form 8-K, the Company makes no admission as to the materiality of any information in this report. The Company undertakes no duty or obligation to publicly update or revise the information contained in this report, although it may do so from time to time as its management believes is appropriate. Any such updating may be made through the filing or furnishing of other reports or documents with the SEC, through press releases or through other public disclosure.

Additional Information and Where You Can Find It

Biodel filed a definitive proxy statement with Securities and Exchange Commission (the “SEC”) on September 19, 2016 in connection with the solicitation of proxies for its 2016 Annual Meeting of Stockholders and has mailed the definitive proxy statement and other relevant materials to Biodel’s stockholders. At the 2016 Annual Meeting of Stockholders, Biodel’s stockholders will be asked to approve, among other things, a proposal for the issuance of Biodel’s common stock in the previously announced proposed transaction with Albireo. BIODEL’S STOCKHOLDERS ARE URGED TO READ THE DEFINITIVE PROXY STATEMENT IN CONNECTION WITH THE SOLICITATION OF PROXIES FOR BIODEL’S 2016 ANNUAL MEETING OF STOCKHOLDERS AND ANY OTHER RELEVANT DOCUMENTS FILED WITH THE SEC, AS WELL AS ANY AMENDMENTS OR SUPPLEMENTS TO THESE DOCUMENTS, BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT BIODEL, ALBIREO AND THE PROPOSED TRANSACTION. These documents and other documents filed by Biodel can be obtained free of charge from the SEC’s website at www.sec.gov. These documents also can be obtained free of charge by accessing Biodel’s website at www.biodel.com or by contacting Biodel’s Corporate Secretary at 203-796-5000 or by mail at Investor Relations, Biodel Inc., 100 Saw Mill Road, Danbury, Connecticut 06810.

Participants in Solicitation

Biodel, Albireo, their respective directors and executive officers and other persons may be deemed to be participants in the solicitation of proxies from Biodel’s stockholders in connection with Biodel’s 2016 Annual Meeting of Stockholders under the rules of the SEC. Information about these participants, and a description of their direct and indirect interests, by security holdings or otherwise, may be found in the definitive proxy statement that Biodel filed with the SEC on September 19, 2016 relating to its 2016 Annual Meeting of Stockholders. The definitive proxy statement has been mailed to all stockholders of record as of the record date set for the 2016 Annual Meeting of Stockholders and can also be obtained free of charge from the sources indicated above. Other information regarding participants in the proxy solicitation may be contained in other relevant materials filed by Biodel with the SEC.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Exhibit Index