SEC FORM 3

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^*

Barclay Alec

(Last)

(First)

(Middle)

101 HARTWELL AVENUE

(Street)

LEXINGTON

02421

(City)

(State)

(Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
03/06/2018

3. Issuer Name and Ticker or Trading Symbol
T2 Biosystems, Inc. [ TTOO ]

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	SVP, Operations

5. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	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)
Common Stock	890	D

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)
1. Title of Derivative Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	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)
Stock Option	⁽¹⁾	04/25/2026	Common Stock	15,000	$9.32	D
Stock Option	⁽²⁾	09/12/2026	Common Stock	10,000	$6.79	D
Stock Option	⁽³⁾	01/05/2027	Common Stock	15,000	$5.19	D
Restricted Stock Unit	⁽⁴⁾	⁽⁴⁾	Common Stock	20,000	⁽⁵⁾	D
Stock Option	⁽⁶⁾	03/01/2028	Common Stock	90,000	$5.08	D

Explanation of Responses:

1. This Stock Option was granted on April 25, 2016 and vesting commenced on the grant date. Options to purchase 25% of the total underlying shares vest on the first anniversary of the vesting commencement date and options to purchase the remaining shares vest in 36 equal monthly installments thereafter.

2. This Stock Option was granted on September 12, 2016 and vesting commenced on the grant date. Options to purchase the underlying shares vest in 48 equal monthly installments beginning on the grant date.

3. This Stock Option was granted on January 5, 2017 and vesting commenced on the grant date. Options to purchase the underlying shares vest in 48 equal monthly installments beginning on the grant date.

4. The restricted stock units vest in two annual installments beginning on September 11, 2017.

5. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

6. This Stock Option was granted on March 1, 2018 and vesting commenced on the grant date. Options to purchase the underlying shares vest in 48 equal monthly installments beginning on the grant date.

Remarks:

Exhibit List: Exhibit 24 - Power of Attorney

	/s/ Michael Gibbs	03/14/2018
	** 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).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.