SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person* AISLING CAPITAL III LP (Last) (First) (Middle) 888 SEVENTH AVENUE, 30TH FLOOR (Street) NEW YORK, NY 10016 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 08/06/2014	3. Issuer Name and Ticker or Trading Symbol T2 Biosystems, Inc. [ TTOO ]
		4. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director X 10% Owner Officer (give title below) Other (specify below)	5. If Amendment, Date of Original Filed (Month/Day/Year)
			6. Individual or Joint/Group Filing (Check Applicable Line) Form filed by One Reporting Person X Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Series D Convertible Preferred Stock	(1)	(1)	Common Stock	1,745,313	0.00	I	See footnote(2)
Series E Convertible Preferred Stock	(1)	(1)	Common Stock	323,441	0.00	I	See footnote(2)

1. Name and Address of Reporting Person* AISLING CAPITAL III LP (Last) (First) (Middle) 888 SEVENTH AVENUE, 30TH FLOOR (Street) NEW YORK, NY 10016 (City) (State) (Zip)

1. Name and Address of Reporting Person* Aisling Capital Partners III LP (Last) (First) (Middle) 888 SEVENTH AVENUE, 30TH FLOOR (Street) NEW YORK, NY 10016 (City) (State) (Zip)

1. Name and Address of Reporting Person* Aisling Capital Partners III LLC (Last) (First) (Middle) 888 SEVENTH AVENUE, 30TH FLOOR (Street) NEW YORK, NY 10016 (City) (State) (Zip)

1. Name and Address of Reporting Person* SCHIFF ANDREW N (Last) (First) (Middle) 888 SEVENTH AVENUE, 30TH FLOOR (Street) NEW YORK, NY 10016 (City) (State) (Zip)

1. Name and Address of Reporting Person* Purcell Dennis J (Last) (First) (Middle) 888 SEVENTH AVENUE, 30TH FLOOR (Street) NEW YORK, NY 10016 (City) (State) (Zip)

1. Name and Address of Reporting Person* ELMS STEVE (Last) (First) (Middle) 888 SEVENTH AVENUE, 30TH FLOOR (Street) NEW YORK, NY 10016 (City) (State) (Zip)

Explanation of Responses:

1. The preferred stock is convertible at any time, at the holder's election and has no expiration date. The preferred stock will automatically convert into common stock upon the closing of the Issuer's initial public offering.

2. The reportable securities are owned directly by Aisling Capital III, LP ("Aisling"), and held indirectly by Aisling Capital Partners III, LP ("Aisling GP"), as general partner of Aisling, Aisling Capital Partners III LLC ("Aisling Partners"), as general partner of Aisling GP, and each of the individual managing members of Aisling Partners. The individual managing members (collectively, the "Managers") of Aisling Partners are Dennis Purcell, Dr. Andrew Schiff and Steve Elms. Aisling GP, Aisling Partners and the Managers share voting and dispostive power over the shares directly held by Aisling.

	/s/ AISLING CAPITAL III, L.P. By: Aisling Capital Partners III, L.P., its General Partner, By: Aisling Capital Partners III, LLC, its General Partner, By: /s/ Lloyd Appel, CFO	08/06/2014
	/s/ AISLING CAPITAL PARTNERS III, L.P. By: Aisling Capital Partners III, LLC, its General Partner, By: /s/ Lloyd Appel, CFO	08/06/2014
	/s/ AISLING CAPITAL PARTNERS III, LLC By: /s/ Lloyd Appel, CFO	08/06/2014
	/s/ Andrew Schiff	08/06/2014
	/s/ Dennis Purcell	08/06/2014
	/s/ Steve Elms	08/06/2014
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
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