X0306 4 2013-11-19 1 0001438133 TANDEM DIABETES CARE INC TNDM 0001340660 HLM VENTURE PARTNERS II, L.P. 222 BERKELEY STREET BOSTON MA 02116 0 0 0 1 Previously a 10% Owner 0001591541 HLM Venture Associates II, LLC 222 BERKELEY STREET BOSTON MA 02116 0 0 1 0 0001025665 CAHILL EDWARD L C/O HLM VENTURE PARTNERS, 222 BERKELEY STREET BOSTON MA 02116 1 0 1 0 0001242813 GRUA PETER J 222 BERKELEY STREET BOSTON MA 02116 0 0 1 0 0001225960 RAY RUSSELL T 222 BERKELEY STREET BOSTON MA 02116 0 0 1 0 Common Stock 2013-11-19 4 C 0 1454058 0.00 A 1454058 D Series C Preferred Stock 2013-11-19 4 C 0 374805 0.00 D Common Stock 223684 0 D Series D Preferred Stock 2013-11-19 4 C 0 2061616 0.00 D Common Stock 1230374 0 D The reported securities are owned by HLM Venture Partners II, L.P. HLM Venture Associates II, L.L.C. (the "General Partner"), and Edward L. Cahill, Peter J. Grua and Russell T. Ray, the managing members of the General Partner, may be deemed to share voting and dispositive power over the reported securities but each disclaims beneficial ownership in the securities held by HLM Venture Partners II, L.P., except to the extent of their pecuniary interest therein. Following the completion of the Issuer's initial public offering, HLM Venture Partners II, L.P. and its affiliated persons are no longer a 10% Owner. Each share of Preferred Stock automatically converted on a 1-to-0.5968 basis into Common Stock immediately upon the consummation of the Issuer's initial public offering and had no expiration date. The number of shares of Preferred Stock reflects the effect of applicable anti-dilution adjustments that occurred as a result of the issuance of the Series D Preferred Stock. /s/ David B. Berger, Attorney-in-Fact for HLM Venture Partners, II, L.P. 2013-11-21 /s/ David B. Berger, Attorney-in-Fact for HLM Venture Associates II, L.L.C. 2013-11-21 /s/ David B. Berger, Attorney-in-Fact for Edward L. Cahill 2013-11-21 /s/ David B. Berger, Attorney-in-Fact for Peter J. Grua 2013-11-21 /s/ David B. Berger, Attorney-in-Fact for Russell T. Ray 2013-11-21