X0206 3 2018-03-06 0 0001492674 T2 Biosystems, Inc. TTOO 0001734339 Barclay Alec 101 HARTWELL AVENUE LEXINGTON MA 02421 0 1 0 0 SVP, Operations Common Stock 890 D Stock Option 9.32 2026-04-25 Common Stock 15000 D Stock Option 6.79 2026-09-12 Common Stock 10000 D Stock Option 5.19 2027-01-05 Common Stock 15000 D Restricted Stock Unit Common Stock 20000 D Stock Option 5.08 2028-03-01 Common Stock 90000 D 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. 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. 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. The restricted stock units vest in two annual installments beginning on September 11, 2017. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock. 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. Exhibit List: Exhibit 24 - Power of Attorney /s/ Michael Gibbs 2018-03-14