Company · CIK 0001438133 · SIC 3841 — Surgical & Medical Instruments & Apparatus · Nasdaq

TANDEM DIABETES CARE INC · TNDM

Insider activity reported against this company. All insider holders · On EDGAR ↗

Period1M 3M 6M 1Y 2Y All datashares as filed — not split-adjusted

Open-market buys & salesbuys $7.2M · 11sales $33.9M · 29net −$26.8M

Reported at this company — common stock

Trade	Reported (ET)	Insider	Shares	Avg price	Total	Owned after	Δ stake	Flags
Aug 15, 2026 FMForm 4 →	Aug 18, 4:28 pm EDT	Leigh VossellerEVP & CHIEF FINANCIAL OFFICER	5,599	$22.72	$33,603	52,040	—
Aug 15, 2026 FMForm 4 →	Aug 18, 4:28 pm EDT	John F SheridanPRESIDENT & CEO, Director	24,015	$22.72	$184,009	160,260	—
Aug 15, 2026 FMForm 4 →	Aug 18, 4:28 pm EDT	Susan MorrisonEVP & Chief Admin. Officer	3,636	$22.72	$18,380	52,788	—
Aug 15, 2026 FMForm 4 →	Aug 18, 4:27 pm EDT	Jean-Claude KyrillosEVP & Chief Operating Officer	1,545	$22.72	$12,155	30,290	—
Aug 15, 2026 FMForm 4 →	Aug 18, 4:27 pm EDT	Elizabeth Anne GasserEVP, Chief Strategy Officer	4,632	$22.72	$36,761	1,396	—
Aug 15, 2026 FMForm 4 →	Aug 18, 4:27 pm EDT	Rick CarpenterEVP & Chief Technology Officer	3,784	$22.72	$29,013	32,148	—
Aug 15, 2026 FMForm 4 →	Aug 18, 4:26 pm EDT	Shannon Marie HansenEVP & Chief Legal Officer	4,549	$22.72	$34,875	31,650	—
Jul 15, 2026 FMForm 4 →	Jul 17, 4:07 pm EDT	Jean-Claude KyrillosEVP & Chief Operating Officer	5,562	$15.28	$29,429	29,815	—
Jun 2, 2026 GForm 4 →	Jun 4, 4:09 pm EDT	Elizabeth Anne GasserEVP, Chief Strategy Officer	14,320	—	—	33,109	—
Mar 11, 2019 SForm 4 →	Mar 13, 7:10 pm EDT	Kim D BlickenstaffExecutive Chairman, Director	200,000	$64.95	$12,990,444	991,750	−16.8%	plan?
Mar 8, 2019 SForm 4 →	Mar 11, 4:13 pm EDT	Dick AllenDirector	17,539	$62.58	$1,097,630	14,000	−55.6%	plan?
Mar 6, 2019 JForm 4 →	Mar 8, 5:32 pm EST	Edward L CahillDirector	21,382	—	—	3,982	—	plan?
Mar 1, 2019 SForm 4 →	Mar 4, 7:24 pm EST	Susan MorrisonEVP & CAO	60,000	$67.79	$4,067,368	3,745	−94.1%	plan?
Mar 1, 2019 MForm 4 →	Mar 4, 7:24 pm EST	Susan MorrisonEVP & CAO	60,000	$3.84	$230,625	63,745	—	plan?
Feb 28, 2019 SForm 4 →	Mar 1, 5:58 pm EST	Howard E Greene Jr.Director	10,000	$65.39	$653,884	40,000	−20.0%	plan?
Feb 27, 2019 SForm 4 →	Feb 27, 6:39 pm EST	John F SheridanEVP, CHIEF OPERATING OFFICER	20,000	$62.03	$1,240,556	666	−96.8%	plan?
Feb 27, 2019 MForm 4 →	Feb 27, 6:39 pm EST	John F SheridanEVP, CHIEF OPERATING OFFICER	20,000	$3.12	$62,485	20,666	—	plan?
Jan 25, 2019 SForm 4 →	Jan 25, 5:55 pm EST	John F SheridanEVP, CHIEF OPERATING OFFICER	20,000	$45.26	$905,178	666	−96.8%	plan?
Jan 25, 2019 MForm 4 →	Jan 25, 5:55 pm EST	John F SheridanEVP, CHIEF OPERATING OFFICER	20,000	$2.59	$51,800	20,666	—	plan?
Jan 15, 2019 SForm 4 →	Jan 15, 4:45 pm EST	Brian B HansenEVP & CHIEF COMMERCIAL OFFICER	25,000	$41.54	$1,038,528	1,381	−94.8%	plan?
Jan 15, 2019 MForm 4 →	Jan 15, 4:45 pm EST	Brian B HansenEVP & CHIEF COMMERCIAL OFFICER	25,000	$2.59	$64,750	26,381	—	plan?
Jan 8, 2019 SForm 4 →	Jan 9, 5:19 pm EST	David B BergerEVP, GEN. COUNSEL & SECRETARY	10,000	$40.08	$400,751	1,765	−85.0%	plan?
Jan 8, 2019 MForm 4 →	Jan 9, 5:19 pm EST	David B BergerEVP, GEN. COUNSEL & SECRETARY	10,000	$2.59	$25,900	11,765	—	plan?
Jan 2, 2019 MForm 4 →	Jan 3, 4:19 pm EST	John F SheridanEVP, CHIEF OPERATING OFFICER	20,000	$2.59	$51,800	20,666	—	plan?
Dec 31, 2018 SForm 4 →	Jan 3, 2019, 4:19 pm EST	John F SheridanEVP, CHIEF OPERATING OFFICER	20,788	$35.76	$743,308	666	−96.9%	plan?
Dec 12, 2018 SForm 4 →	Dec 13, 7:30 pm EST	Brian B HansenEVP & CHIEF COMMERCIAL OFFICER	25,000	$37.75	$943,750	1,381	−94.8%	plan?
Dec 12, 2018 MForm 4 →	Dec 13, 7:30 pm EST	Brian B HansenEVP & CHIEF COMMERCIAL OFFICER	25,000	$2.59	$64,750	26,381	—	plan?
Dec 6, 2018 SForm 4/A →	Dec 13, 7:30 pm EST	David B BergerEVP, GEN. COUNSEL & SECRETARY	11,493	$34.54	$396,991	200	−98.3%	plan?
Dec 6, 2018 MForm 4/A →	Dec 13, 7:30 pm EST	David B BergerEVP, GEN. COUNSEL & SECRETARY	10,000	$2.59	$25,900	11,765	—	plan?
Dec 6, 2018 SForm 4 →	Dec 7, 6:34 pm EST	David B BergerEVP, GEN. COUNSEL & SECRETARY	11,493	$34.54	$396,991	200	−98.3%	plan? amended
Dec 6, 2018 MForm 4 →	Dec 7, 6:34 pm EST	David B BergerEVP, GEN. COUNSEL & SECRETARY	10,000	$2.59	$25,900	11,765	—	plan? amended
Nov 28, 2018 JForm 4 →	Nov 30, 8:37 pm EST	Edward L CahillDirector	191,316	—	—	17,400	—	plan?
Nov 15, 2018 AForm 4 →	Nov 19, 6:29 pm EST	Leigh VossellerEVP and CFO	1,255	$16.92	$21,235	2,145	—	plan?
Nov 15, 2018 AForm 4 →	Nov 19, 6:26 pm EST	John F SheridanEVP, CHIEF OPERATING OFFICER	676	$16.92	$11,438	1,454	—	plan?
Nov 15, 2018 AForm 4 →	Nov 19, 6:25 pm EST	Susan MorrisonEVP & CAO	1,255	$16.92	$21,235	3,745	—	plan?
Nov 15, 2018 AForm 4 →	Nov 19, 6:24 pm EST	Brian B HansenEVP & CHIEF COMMERCIAL OFFICER	482	$16.92	$8,155	1,381	—	plan?
Nov 15, 2018 AForm 4 →	Nov 19, 6:21 pm EST	David B BergerEVP, GEN. COUNSEL & SECRETARY	965	$16.92	$16,328	1,765	—	plan?
Nov 6, 2018 SForm 4 →	Nov 7, 5:02 pm EST	Howard E Greene Jr.Director	11,787	$36.53	$430,579	50,000	−19.1%	plan?
Nov 6, 2018 SForm 4 →	Nov 7, 5:02 pm EST	Kim D BlickenstaffPRESIDENT & CEO, Director	198,000	$37.01	$7,327,626	1,191,750	−14.2%	plan?
Nov 5, 2018 PForm 4 →	Nov 7, 5:03 pm EST	Richard P. ValenciaDirector	1,300	$37.75	$49,075	3,054	+74.1%	plan?
Nov 5, 2018 SForm 4 →	Nov 7, 5:01 pm EST	Dick AllenDirector	15,222	$38.02	$578,676	52,000	−22.6%	plan?
Aug 3, 2018 PForm 4 →	Aug 3, 5:04 pm EDT	Richard P. ValenciaDirector	1,754	$28.50	$49,989	1,754	—	plan?
Apr 16, 2018 FMForm 4 →	Apr 17, 8:24 pm EDT	Kim D BlickenstaffPRESIDENT & CEO, Director	418,144	$4.78	$1,999,902	1,389,750	—	plan?
Mar 6, 2018 PForm 4 →	Mar 7, 4:05 pm EST	Dick AllenDirector	25,539	$3.88	$99,217	22,001	—	plan?
Feb 9, 2018 PForm 4 →	Feb 13, 4:59 pm EST	Douglas A RoederDirector	1,000,000	$2.00	$2,000,000	13,217	—	plan?
Feb 9, 2018 PForm 4 →	Feb 13, 4:58 pm EST	Dick AllenDirector	60,000	$2.00	$120,000	13,898	—	plan?
Feb 9, 2018 PForm 4 →	Feb 13, 4:56 pm EST	Howard E Greene Jr.Director	50,000	$2.00	$100,000	61,787	+424%	plan?
Feb 9, 2018 PForm 4 →	Feb 13, 4:54 pm EST	Christopher J TwomeyDirector	75,000	$2.00	$150,000	26,758	—	plan?
Feb 9, 2018 PForm 4 →	Feb 13, 4:52 pm EST	Kim D BlickenstaffPRESIDENT & CEO, Director	750,000	$2.00	$1,500,000	1,236,494	+154%	plan?
Oct 13, 2017 PForm 4 →	Oct 17, 6:54 pm EDT	Kim D BlickenstaffPRESIDENT & CEO, Director	285,700	$3.50	$999,950	486,494	+142%	plan?
May 15, 2017 AForm 4 →	May 18, 5:04 pm EDT	Susan MorrisonCHIEF ADMINSTRATIVE OFFICER	12,501	$0.77	$9,626	24,900	—	plan? late
May 15, 2017 AForm 4 →	May 18, 5:03 pm EDT	Brian B HansenEVP & CHIEF COMMERCIAL OFFICER	5,303	$0.77	$4,083	8,974	—	plan? late
May 15, 2017 AForm 4 →	May 18, 5:01 pm EDT	John CajigasEVP, CFO & TREASURER	10,831	$0.77	$8,340	18,353	—	plan? late
Mar 23, 2017 PForm 4/A →	Mar 29, 5:34 pm EDT	Kim D BlickenstaffPRESIDENT & CEO, Director	1,600,000	$1.25	$2,000,000	2,007,939	+392%	plan?
Mar 23, 2017 PForm 4 →	Mar 23, 8:28 pm EDT	Kim D BlickenstaffPRESIDENT & CEO, Director	1,600,000	$1.25	$2,000,000	2,007,939	+392%	plan? amended
Nov 15, 2016 AForm 4 →	Nov 16, 7:56 pm EST	Brian B HansenEVP & CHIEF COMMERCIAL OFFICER	3,671	$1.62	$5,947	3,671	—	plan?
Aug 1, 2016 SForm 4 →	Aug 3, 6:38 pm EDT	John F SheridanEVP, CHIEF OPERATING OFFICER	15,000	$6.52	$97,800	7,763	−65.9%	plan?
Aug 1, 2016 MForm 4 →	Aug 3, 6:38 pm EDT	John F SheridanEVP, CHIEF OPERATING OFFICER	15,000	$1.11	$16,589	22,763	—	plan?
May 13, 2016 AForm 4 →	May 16, 4:12 pm EDT	John F SheridanEVP, CHIEF OPERATING OFFICER	2,468	$5.73	$14,142	7,763	—	plan?
May 13, 2016 AForm 4 →	May 16, 4:10 pm EDT	Susan MorrisonCHIEF ADMINSTRATIVE OFFICER	2,469	$5.73	$14,147	12,399	—	plan?
May 13, 2016 AForm 4 →	May 16, 4:09 pm EDT	John CajigasEVP, CFO & TREASURER	2,469	$5.73	$14,147	7,522	—	plan?
May 13, 2016 AForm 4 →	May 16, 4:08 pm EDT	David B BergerEVP, GEN. COUNSEL & SECRETARY	4,009	$5.73	$22,972	7,988	—	plan?
May 2, 2016 SForm 4 →	May 2, 4:50 pm EDT	John F SheridanEVP, CHIEF OPERATING OFFICER	2,000	$10.61	$21,213	5,295	−27.4%	plan?
May 2, 2016 MForm 4 →	May 2, 4:50 pm EDT	John F SheridanEVP, CHIEF OPERATING OFFICER	2,000	$1.11	$2,212	7,295	—	plan?
Apr 22, 2016 SForm 4 →	Apr 22, 5:32 pm EDT	John F SheridanEVP, CHIEF OPERATING OFFICER	2,000	$10.00	$20,000	5,295	−27.4%	plan?
Apr 22, 2016 MForm 4 →	Apr 22, 5:32 pm EDT	John F SheridanEVP, CHIEF OPERATING OFFICER	2,000	$1.11	$2,212	7,295	—	plan?
Mar 7, 2016 SForm 4 →	Mar 9, 6:40 pm EST	John F SheridanEVP, CHIEF OPERATING OFFICER	4,000	$10.01	$40,026	5,295	−43.0%	plan?
Mar 7, 2016 MForm 4 →	Mar 9, 6:40 pm EST	John F SheridanEVP, CHIEF OPERATING OFFICER	4,000	$1.11	$4,424	9,295	—	plan?
Feb 26, 2016 PForm 4 →	Feb 29, 5:32 pm EST	Dick AllenDirector	10,000	$8.24	$82,439	131,598	+8.22%	plan?
Jan 4, 2016 SForm 4/A →	Mar 9, 6:39 pm EST	John F SheridanEVP, CHIEF OPERATING OFFICER	2,000	$11.47	$22,944	5,295	−27.4%	plan?
Jan 4, 2016 MForm 4/A →	Mar 9, 6:39 pm EST	John F SheridanEVP, CHIEF OPERATING OFFICER	2,000	$1.11	$2,212	7,295	—	plan?
Jan 4, 2016 SForm 4 →	Jan 5, 5:19 pm EST	John F SheridanEVP & CHIEF OPERATING OFFICER	2,000	$11.47	$22,944	3,295	−37.8%	plan? amended
Jan 4, 2016 MForm 4 →	Jan 5, 5:19 pm EST	John F SheridanEVP & CHIEF OPERATING OFFICER	2,000	$1.11	$2,212	5,295	—	plan? amended
Dec 1, 2015 SForm 4 →	Dec 2, 4:13 pm EST	John F SheridanEVP & CHIEF OPERATING OFFICER	2,000	$10.14	$20,280	4,084	−32.9%	plan?
Dec 1, 2015 MForm 4 →	Dec 2, 4:13 pm EST	John F SheridanEVP & CHIEF OPERATING OFFICER	2,000	$1.11	$2,212	6,084	—	plan?
Nov 2, 2015 SForm 4 →	Nov 3, 6:11 pm EST	John F SheridanEVP & CHIEF OPERATING OFFICER	4,000	$10.00	$40,000	4,084	−49.5%	plan?
Nov 2, 2015 MForm 4 →	Nov 3, 6:11 pm EST	John F SheridanEVP & CHIEF OPERATING OFFICER	4,000	$1.11	$4,424	8,084	—	plan?
Sep 14, 2015 SForm 4 →	Sep 16, 3:58 pm EDT	John F SheridanEVP & CHIEF OPERATING OFFICER	2,000	$12.51	$25,020	4,084	−32.9%	plan?
Sep 14, 2015 MForm 4 →	Sep 16, 3:58 pm EDT	John F SheridanEVP & CHIEF OPERATING OFFICER	2,000	$1.11	$2,212	6,084	—	plan?
Aug 5, 2015 SForm 4 →	Aug 7, 4:13 pm EDT	John F SheridanEVP & CHIEF OPERATING OFFICER	35,000	$12.45	$435,587	4,084	−89.6%	plan?
Aug 5, 2015 MForm 4 →	Aug 7, 4:13 pm EDT	John F SheridanEVP & CHIEF OPERATING OFFICER	35,000	$1.11	$38,707	21,584	—	plan?
Aug 3, 2015 SForm 4 →	Aug 4, 4:40 pm EDT	Howard E Greene Jr.Director	20,000	$12.70	$254,038	117,865	−14.5%	plan?
May 15, 2015 AForm 4 →	May 22, 8:40 pm EDT	John F SheridanEVP & CHIEF OPERATING OFFICER	1,849	$10.54	$19,488	4,084	—	plan? late
May 15, 2015 AForm 4 →	May 22, 8:38 pm EDT	Susan MorrisonCHIEF ADMINSTRATIVE OFFICER	1,721	$10.54	$18,139	9,930	—	plan? late
May 15, 2015 AForm 4 →	May 22, 8:35 pm EDT	John CajigasCHIEF FINANCIAL OFFICER	1,721	$10.54	$18,139	5,053	—	plan? late
May 15, 2015 AForm 4 →	May 22, 8:28 pm EDT	David B BergerGENERAL COUNSEL	647	$10.54	$6,819	3,979	—	plan? late
May 1, 2015 SForm 4 →	May 1, 4:46 pm EDT	John F SheridanEVP & CHIEF OPERATING OFFICER	2,000	$13.72	$27,436	2,235	−47.2%	plan?
May 1, 2015 MForm 4 →	May 1, 4:46 pm EDT	John F SheridanEVP & CHIEF OPERATING OFFICER	2,000	$1.11	$2,212	4,235	—	plan?
Apr 1, 2015 SForm 4 →	Apr 3, 5:03 pm EDT	John F SheridanEVP & CHIEF OPERATING OFFICER	2,000	$12.47	$24,939	2,235	−47.2%	plan?
Apr 1, 2015 MForm 4 →	Apr 3, 5:03 pm EDT	John F SheridanEVP & CHIEF OPERATING OFFICER	2,000	$1.11	$2,212	4,235	—	plan?
Mar 2, 2015 SForm 4 →	Mar 4, 6:06 pm EST	John F SheridanEVP & CHIEF OPERATING OFFICER	2,000	$11.76	$23,513	2,235	−47.2%	plan?
Mar 2, 2015 MForm 4 →	Mar 4, 6:06 pm EST	John F SheridanEVP & CHIEF OPERATING OFFICER	2,000	$1.11	$2,212	4,235	—	plan?
Feb 2, 2015 SForm 4 →	Feb 3, 6:28 pm EST	John F SheridanEVP & CHIEF OPERATING OFFICER	2,000	$12.06	$24,127	2,235	−47.2%	plan?
Feb 2, 2015 MForm 4 →	Feb 3, 6:28 pm EST	John F SheridanEVP & CHIEF OPERATING OFFICER	2,000	$1.11	$2,212	4,235	—	plan?
Jan 2, 2015 SForm 4 →	Jan 5, 4:51 pm EST	John F SheridanEVP & CHIEF OPERATING OFFICER	2,000	$12.75	$25,501	2,235	−47.2%	plan?
Jan 2, 2015 MForm 4 →	Jan 5, 4:51 pm EST	John F SheridanEVP & CHIEF OPERATING OFFICER	2,000	$1.11	$2,212	4,235	—	plan?

Reported at this company — derivatives (options, RSUs, warrants)

Trade	Reported (ET)	Insider	Shares	Avg price	Total	Owned after	Δ stake
May 21, 2015 AForm 4 →	May 22, 8:35 pm EDT	John CajigasCHIEF FINANCIAL OFFICER	56,400	—	—	56,400	—
May 21, 2015 AForm 4 →	May 22, 8:29 pm EDT	Kim D BlickenstaffCHIEF EXECUTIVE OFFICER, Director	157,900	—	—	157,900	—
May 21, 2015 AForm 4 →	May 22, 8:28 pm EDT	David B BergerGENERAL COUNSEL	56,400	—	—	56,400	—
May 21, 2015 AForm 4 →	May 22, 8:20 pm EDT	Robert AnaconeEVP & CHIEF COMMERICAL OFFICER	56,400	—	—	56,400	—
May 1, 2015 MForm 4 →	May 1, 4:46 pm EDT	John F SheridanEVP & CHIEF OPERATING OFFICER	2,000	—	—	155,040	—
Apr 1, 2015 MForm 4 →	Apr 3, 5:03 pm EDT	John F SheridanEVP & CHIEF OPERATING OFFICER	2,000	—	—	157,040	—
Mar 2, 2015 MForm 4 →	Mar 4, 6:06 pm EST	John F SheridanEVP & CHIEF OPERATING OFFICER	2,000	—	—	159,040	—
Feb 2, 2015 MForm 4 →	Feb 3, 6:28 pm EST	John F SheridanEVP & CHIEF OPERATING OFFICER	2,000	—	—	161,040	—
Jan 2, 2015 MForm 4 →	Jan 5, 4:51 pm EST	John F SheridanEVP & CHIEF OPERATING OFFICER	2,000	—	—	163,040	—