UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 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): May 14, 2015

Aradigm Corporation

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code: (510) 265-9000

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 (see General Instruction A.2. below):

Item 5.07 Submission of Matters to a Vote of Security Holders.

On May 14, 2015, Aradigm Corporation (the “Company”) convened its Annual Meeting of Shareholders (the “Meeting”). Four proposals were presented and voted on and the results for the four proposals were reported at the Meeting. Set forth below are the results reported at the Meeting for proposals 1, 2, 3 and 4.

Proposal 1 – Election of David Bell, Igor Gonda, Frederick Hudson, Lafmin Morgan, John M. Siebert and Virgil D. Thompson as directors to serve until the next annual meeting of shareholders and until their successors are duly elected and qualified.

All of the following six nominees for directors were elected to hold offices until the next annual meeting of shareholders and until their successors are elected:

The six nominees received the highest number of “For” votes from the holders of votes of shares present in person or represented by proxy and entitled to vote at the Meeting on the election of directors. Withheld votes and broker non-votes have no effect on the outcome of the election of directors.

Proposal 2 – Approval of an amendment to Aradigm’s Employee Stock Purchase Plan to increase the aggregate number of shares of Aradigm’s common stock authorized for issuance under the Plan by 110,000 shares.

Proposal 2 received “For” votes from the holders of at least a majority of the outstanding shares of common stock present either in person or by proxy and entitled to vote at the Meeting. Proposal 2 therefore passed.

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Proposal 3 – Approval of Aradigm’s 2015 Equity Incentive Plan.

Proposal 3 received “For” votes from the holders of at least a majority of the outstanding shares of common stock present either in person or by proxy and entitled to vote at the Meeting. Proposal 3 therefore passed.

Proposal 4 – Ratification of the selection of OUM & Co. LLP as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2015.

Proposal 4 received “For” votes from the holders of at least a majority of the outstanding shares of common stock present either in person or by proxy and entitled to vote at the Meeting. Proposal 4 therefore passed.

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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 hereunto duly authorized.

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