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): December 1, 2015

T2 BIOSYSTEMS, INC.

(Exact name of registrant as specified in its charter)

101 Hartwell Avenue, Lexington, Massachusetts 02421
(Address of principal executive offices, including Zip Code)

(781) 761-4646
(Registrant’s telephone number, including area code)

N/A
(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:

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

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

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

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

Item 8.01                                           Other Events.

On December 1, 2015, T2 Biosystems, Inc. (the “Company”) issued a press release announcing a proposed public offering of shares of its common stock (the “Offering”), subject to market conditions and other factors.  The Company’s press release announcing the Offering is filed as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.  In connection with the Offering, the Company is filing this Current Report on Form 8-K to update its risk factors previously disclosed in its periodic and other reports filed with the Securities and Exchange Commission pursuant to the Securities Exchange Act of 1934, as amended.  The updated risk factors are attached hereto as Exhibit 99.2 and incorporated herein by reference.

This Current Report on Form 8-K does not constitute an offer to sell or the solicitation of an offer to buy shares of common stock, nor shall there be any offer, solicitation or sale of these securities in any state in which such offer, solicitation or sale would be unlawful. Any offers of the securities will be made only by means of a prospectus supplement.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits

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SIGNATURES

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

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EXHIBIT INDEX

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