POSITIVEID (PSID) 424B3 Prospectus supplement

Filed Pursuant to Rule 424(b)(3)

File Number 333-179258

Prospectus Supplement No. 6

To Prospectus dated April 10, 2012

POSITIVEID CORPORATION

36,970,450

Shares of

Common Stock

This Prospectus Supplement No. 6 supplements the Prospectus dated April 10, 2012 relating to the resale by the selling stockholders of up to 36,970,450 shares of our common stock. This Prospectus Supplement No. 6 includes the attached Form 8-K filed by us with the Securities and Exchange Commission on September 18, 2012.

This Prospectus Supplement No. 6 should be read in conjunction with, and may not be delivered or utilized without, the Prospectus and all other amendments or supplements to the Prospectus. This Prospectus Supplement No. 6 is qualified by reference to the Prospectus and any other amendments or supplements to the Prospectus, except to the extent that the information in this Prospectus Supplement No. 6 updates and supersedes the information contained in the Prospectus and any other amendments or supplements to the Prospectus.

INVESTING IN THESE SECURITIES INVOLVES RISKS. YOU SHOULD CAREFULLY CONSIDER THE RISK FACTORS BEGINNING ON PAGE 5 OF THE PROSPECTUS BEFORE PURCHASING THE COMMON STOCK.

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 THIS PROSPECTUS SUPPLEMENT NO. 6, THE PROSPECTUS OR ANY OTHER AMENDMENTS OR SUPPLEMENTS TO THE PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.

The date of this Prospectus Supplement No. 6 is September 20, 2012.

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): September 12, 2012

POSITIVEID CORPORATION

(Exact name of registrant as specified in its charter)

DELAWARE	001-33297	06-1637809
(State or other Jurisdiction of Incorporation)	(Commission File Number)	(IRS Employer Identification No.)

1690 SOUTH CONGRESS AVENUE, SUITE 201 DELRAY BEACH, FLORIDA	33445
(Address of Principal Executive Offices)	(Zip Code)

Registrant’s telephone number, including area code:561-805-8008

(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:

□  Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

□  Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

□  Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

□  Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 1.01. Entry into a Material Definitive Agreement.

On September 12, 2012, the Company entered into a Purchase Agreement (the “Purchase Agreement”) with Ironridge Technology Co., a division of Ironridge Global IV, Ltd., a British Virgin Islands business company (“Ironridge”) pursuant to which the Company issued 100 shares of Series F Preferred Stock to Ironridge. The 100 shares Series F Preferred Stock were issued as a waiver to satisfy any penalties resulting from the Company’s late delivery of shares under a conversion of Series F Preferred Stock by Ironridge.

A copy of the Purchase Agreement will be filed as an Exhibit to the Company’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2012. The description of certain terms of the Purchase Agreement set forth herein does not purport to be complete and is qualified in its entirety by the provisions of such agreement.

Item 3.02. Unregistered Sales of Equity Securities.

The shares to be issued by the Company to Ironridge under the Purchase Agreement will be issued in a private placement in reliance upon the exemption from the registration requirements under Section 4(2) of the Securities Act, as amended, and the rules promulgated by the Securities and Exchange Commission thereunder.

The information disclosed under Item 1.01 is incorporated into this Item 3.02 in its entirety.

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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.

PositiveID Corporation

Date: September 18, 2012

/s/ William J. Caragol                                              

William J. Caragol

Chief Executive Officer

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