X0306 4 2017-11-16 0 0001492674 T2 Biosystems, Inc. TTOO 0001292650 Elsbree David B 101 HARTWELL AVE LEXINGTON MA 02421 1 0 0 0 Common Stock 2017-11-16 4 P 0 1500 4.11 A 5775 I By spouse Common Stock 50000 D The reporting person disclaims beneficial ownership of these securities, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose. /s/ Darlene Deptula-Hicks, Attorney-in-fact 2017-11-17