Insider Trading activities at Tandem Diabetes Care Inc (TNDM)

Insider trading activities (stock purchases, sales, and option exercises) reported by insiders of Tandem Diabetes Care Inc (TNDM) since 2015 are shown in Table 1 and Table 2. Table 1 shows the monthly insider trading data of Tandem Diabetes Care Inc. Table 2 shows the detailed insider transactions. This company's CIK number is 1438133.

Total stock buying since 2015: $8,760,324.
Total stock sales since 2015: $288,069,064.
Total stock option exercises since 2015: $40,897,276.

1 2 3 4

Table 1. Yearly summary of insider stock purchases, sales, and option exercises at *Tandem Diabetes Care Inc* (*TNDM*).
	Insider Buying		Insider Sales		Option Exercises
Year	Shares	Value	Shares	Value	Shares	Value
2025	34,258	$442,699	0	$0	281,611	$727,316
2024	532	$12,363	45,000	$1,499,800	122,781	$2,135,032
2023	30,150	$725,493	10,000	$411,880	78,194	$188,600
2022	7,000	$511,000	61,264	$4,357,679	114,161	$1,809,566
2021	0	$0	742,594	$80,143,135	298,653	$7,120,813
2020	0	$0	1,150,064	$113,485,413	1,128,650	$26,226,483
2019	0	$0	1,188,342	$77,361,199	267,000	$1,512,598
2018	1,963,593	$4,068,819	262,290	$9,707,524	320,700	$1,090,600
2017	1,885,700	$2,999,950	0	$0	0	$0
2016	0	$0	25,000	$201,984	25,000	$27,650
2015	0	$0	73,000	$900,450	53,000	$58,618

Table 2. Monthly summary of insider trading at *Tandem Diabetes Care Inc* (*TNDM*).
Trading Period	Insider Buying		Insider Sales		Option Exercises
year-month	Shares	Value	Shares	Value	Shares	Value
2025-08	23,720	$251,730	0	$0	25,127	$0
2025-07	0	$0	0	$0	72,725	$0
2025-06	0	$0	0	$0	11,318	$0
2025-05	0	$0	0	$0	92,205	$727,316
2025-03	10,538	$190,969	0	$0	7,821	$0
2025-02	0	$0	0	$0	72,415	$0
2024-12	0	$0	0	$0	30,064	$0
2024-11	532	$12,363	40,000	$1,241,400	18,919	$0
2024-09	0	$0	0	$0	406	$0
2024-08	0	$0	0	$0	18,922	$0
2024-06	0	$0	0	$0	2,155	$79,282
2024-05	0	$0	5,000	$258,400	41,483	$2,026,154
2024-03	0	$0	0	$0	405	$0
2024-02	0	$0	0	$0	9,357	$0
2024-01	0	$0	0	$0	1,070	$29,596
2023-12	0	$0	0	$0	406	$0
2023-11	13,135	$220,057	0	$0	2,315	$0
2023-09	1,000	$21,450	0	$0	406	$0
2023-08	0	$0	0	$0	5,434	$0
2023-06	0	$0	0	$0	5,124	$0
2023-05	16,015	$483,986	0	$0	46,011	$0
2023-03	0	$0	10,000	$411,880	10,406	$188,600
2023-02	0	$0	0	$0	7,023	$0
2023-01	0	$0	0	$0	1,069	$0

Table 3. Detailed insider trading at *Tandem Diabetes Care Inc* (*TNDM*)
Trade Date	Insider Name	Trade Type	Shares	Price ($)	Value ($)
2025-08-15	Novara Mark David (EVP & CHIEF COMMERCIAL OFFICER)	Option Ex	76	.00	0
2025-08-15	Hansen Shannon Marie (EVP & Chief Legal Officer)	Option Ex	3,065	.00	0
2025-08-15	Gasser Elizabeth Anne (EVP, Chief Strategy Officer)	Option Ex	2,600	.00	0
2025-08-15	Vosseller Leigh (EVP & CHIEF FINANCIAL OFFICER)	Option Ex	2,998	.00	0
2025-08-15	Morrison Susan (EVP & Chief Admin. Officer)	Option Ex	2,600	.00	0
2025-08-15	Carpenter Rick (Chief Technology Officer)	Option Ex	2,335	.00	0
2025-08-15	Sheridan John F (PRESIDENT & CEO)	Option Ex	11,453	.00	0
2025-08-11	Sheridan John F (PRESIDENT & CEO)	Buy	10,000	10.23	102,320
2025-08-08	Vosseller Leigh (EVP & CHIEF FINANCIAL OFFICER)	Buy	13,720	10.89	149,410
2025-07-15	Kyrillos Jean-claude (EVP & Chief Operating Officer)	Option Ex	43,635	.00	0
2025-06-16	Novara Mark David (EVP & CHIEF COMMERCIAL OFFICER)	Option Ex	7,414	.00	0
2025-06-16	Malagueira Joao Paulo Falcao (Director)	Option Ex	1,749	.00	0
2025-06-16	Cha Myoungil (Director)	Option Ex	1,749	.00	0
2025-06-16	Carpenter Rick (Chief Technology Officer)	Option Ex	406	.00	0
2025-05-22	Malagueira Joao Paulo Falcao (Director)	Option Ex	4,387	20.64	90,547
2025-05-22	Cha Myoungil (Director)	Option Ex	4,387	20.64	90,547
2025-05-22	Allen Dick (Director)	Option Ex	4,387	20.64	90,547
2025-05-22	Howell Peyton R (Director)	Option Ex	4,387	20.64	90,547
2025-05-22	Twomey Christopher J (Director)	Option Ex	4,387	20.64	90,547
2025-05-22	Robertson Rebecca B (Director)	Option Ex	4,387	20.64	90,547
2025-05-15	Novara Mark David (EVP & CHIEF COMMERCIAL OFFICER)	Option Ex	304	.00	0
2025-05-15	Hansen Shannon Marie (EVP & Chief Legal Officer)	Option Ex	6,355	.00	0
2025-05-15	Gasser Elizabeth Anne (EVP, Chief Strategy Officer)	Option Ex	6,526	.00	0
2025-05-15	Vosseller Leigh (EVP & CHIEF FINANCIAL OFFICER)	Option Ex	8,121	.00	0
2025-05-15	Morrison Susan (EVP & Chief Admin. Officer)	Option Ex	6,526	.00	0
2025-05-15	Carpenter Rick (Chief Technology Officer)	Option Ex	5,622	.00	0
2025-05-15	Sheridan John F (PRESIDENT & CEO)	Option Ex	32,429	5.67	184,034
2025-03-17	Novara Mark David (EVP & CHIEF COMMERCIAL OFFICER)	Option Ex	7,415	.00	0
2025-03-17	Carpenter Rick (Chief Technology Officer)	Option Ex	406	.00	0
2025-03-07	Kyrillos Jean-claude (EVP & Chief Operating Officer)	Buy	10,538	18.12	190,969
2025-02-25	Gasser Elizabeth Anne (EVP, Chief Strategy Officer)	Option Ex	6,903	.00	0
2025-02-25	Vosseller Leigh (EVP & CHIEF FINANCIAL OFFICER)	Option Ex	6,903	.00	0
2025-02-25	Morrison Susan (EVP & Chief Admin. Officer)	Option Ex	6,903	.00	0
2025-02-25	Sheridan John F (PRESIDENT & CEO)	Option Ex	32,779	.00	0
2025-02-18	Hansen Shannon Marie (EVP & Chief Legal Officer)	Option Ex	1,969	.00	0
2025-02-18	Gasser Elizabeth Anne (EVP, Chief Strategy Officer)	Option Ex	2,141	.00	0
2025-02-18	Vosseller Leigh (EVP & CHIEF FINANCIAL OFFICER)	Option Ex	2,141	.00	0
2025-02-18	Morrison Susan (EVP & Chief Admin. Officer)	Option Ex	2,141	.00	0
2025-02-18	Carpenter Rick (Chief Technology Officer)	Option Ex	2,033	.00	0
2025-02-18	Sheridan John F (PRESIDENT & CEO)	Option Ex	8,502	.00	0
2024-12-16	Novara Mark David (EVP & CHIEF COMMERCIAL OFFICER)	Option Ex	29,658	.00	0
2024-12-16	Carpenter Rick (Chief Technology Officer)	Option Ex	406	.00	0
2024-11-21	Blickenstaff Kim D	Sale	30,000	31.38	941,400
2024-11-20	Blickenstaff Kim D	Sale	10,000	30.00	300,000
2024-11-15	Novara Mark David (EVP & CHIEF COMMERCIAL OFFICER)	Buy	532	23.24	12,363
2024-11-15	Hansen Shannon Marie (EVP & Chief Legal Officer)	Option Ex	1,967	.00	0
2024-11-15	Gasser Elizabeth Anne (EVP, Chief Strategy Officer)	Option Ex	2,140	.00	0
2024-11-15	Vosseller Leigh (EVP & CHIEF FINANCIAL OFFICER)	Option Ex	2,140	.00	0
2024-11-15	Morrison Susan (EVP & Chief Admin. Officer)	Option Ex	2,140	.00	0
2024-11-15	Carpenter Rick (Chief Technology Officer)	Option Ex	2,033	.00	0
2024-11-15	Sheridan John F (PRESIDENT & CEO)	Option Ex	8,499	.00	0
2024-09-16	Carpenter Rick (Chief Technology Officer)	Option Ex	406	.00	0
2024-08-15	Hansen Shannon Marie (EVP & Chief Legal Officer)	Option Ex	1,968	.00	0
2024-08-15	Gasser Elizabeth Anne (EVP, Chief Strategy Officer)	Option Ex	2,140	.00	0
2024-08-15	Vosseller Leigh (EVP & CHIEF FINANCIAL OFFICER)	Option Ex	2,140	.00	0
2024-08-15	Morrison Susan (EVP & Chief Admin. Officer)	Option Ex	2,140	.00	0
2024-08-15	Carpenter Rick (Chief Technology Officer)	Option Ex	2,033	.00	0
2024-08-15	Sheridan John F (PRESIDENT & CEO)	Option Ex	8,501	.00	0
2024-06-17	Malagueira Joao Paulo Falcao (Director)	Option Ex	1,749	45.33	79,282
2024-06-17	Carpenter Rick (Chief Technology Officer)	Option Ex	406	.00	0
2024-05-30	Allen Dick (Director)	Sale	5,000	51.68	258,400
2024-05-28	Leal James (Chief Manufacturing Officer)	Option Ex	310	.00	0
2024-05-28	Gasser Elizabeth Anne (EVP, Chief Strategy Officer)	Option Ex	373	.00	0
2024-05-28	Vosseller Leigh (EVP & CHIEF FINANCIAL OFFICER)	Option Ex	406	.00	0
2024-05-28	Morrison Susan (EVP & Chief Admin. Officer)	Option Ex	406	.00	0
2024-05-28	Sheridan John F (PRESIDENT & CEO)	Option Ex	820	.00	0
2024-05-24	Malagueira Joao Paulo Falcao (Director)	Option Ex	4,065	51.73	210,282
2024-05-24	Cha Myoungil (Director)	Option Ex	4,065	51.73	210,282
2024-05-24	Mcgroddy-goetz Kathleen (Director)	Option Ex	4,434	51.73	229,370
2024-05-24	Sodhi Rajwant (Director)	Option Ex	4,434	51.73	229,370
2024-05-24	Allen Dick (Director)	Option Ex	4,434	51.73	229,370
2024-05-24	Howell Peyton R (Director)	Option Ex	4,434	51.73	229,370
2024-05-24	Twomey Christopher J (Director)	Option Ex	4,434	51.73	229,370
2024-05-24	Blickenstaff Kim D	Option Ex	4,434	51.73	229,370
2024-05-24	Robertson Rebecca B (Director)	Option Ex	4,434	51.73	229,370
2024-03-15	Carpenter Rick (Chief Technology Officer)	Option Ex	405	.00	0
2024-02-27	Leal James (Chief Manufacturing Officer)	Option Ex	309	.00	0
2024-02-27	Gasser Elizabeth Anne (EVP, Chief Strategy Officer)	Option Ex	372	.00	0
2024-02-27	Vosseller Leigh (EVP & CHIEF FINANCIAL OFFICER)	Option Ex	407	.00	0
2024-02-27	Morrison Susan (EVP & Chief Admin. Officer)	Option Ex	407	.00	0
2024-02-27	Sheridan John F (PRESIDENT & CEO)	Option Ex	819	.00	0
2024-02-15	Hansen Shannon Marie (Chief Legal Officer)	Option Ex	531	.00	0
2024-02-15	Leal James (Chief Manufacturing Officer)	Option Ex	973	.00	0
2024-02-15	Gasser Elizabeth Anne (EVP, Chief Strategy Officer)	Option Ex	638	.00	0
2024-02-15	Vosseller Leigh (EVP & CHIEF FINANCIAL OFFICER)	Option Ex	638	.00	0
2024-02-15	Morrison Susan (EVP & Chief Admin. Officer)	Option Ex	638	.00	0
2024-02-15	Carpenter Rick (Chief Technology Officer)	Option Ex	596	.00	0
2024-02-15	Sheridan John F (PRESIDENT & CEO)	Option Ex	3,029	.00	0
2024-01-04	Sodhi Rajwant (Director)	Option Ex	1,070	27.66	29,596
2023-12-15	Carpenter Rick (Chief Technology Officer)	Option Ex	406	.00	0
2023-11-27	Leal James (Chief Manufacturing Officer)	Option Ex	310	.00	0
2023-11-27	Gasser Elizabeth Anne (EVP, Chief Strategy Officer)	Option Ex	373	.00	0
2023-11-27	Allen Dick (Director)	Buy	5,000	18.96	94,780
2023-11-27	Hansen Brian B (EVP & CHIEF COMMERCIAL OFFICER)	Option Ex	406	.00	0
2023-11-27	Berger David B (EVP & Chief Operating Officer)	Option Ex	406	.00	0
2023-11-27	Sheridan John F (PRESIDENT & CEO)	Option Ex	820	.00	0
2023-11-08	Hansen Shannon Marie (Chief Legal Officer)	Buy	1,935	15.44	29,884
2023-11-08	Vosseller Leigh (EVP & CHIEF FINANCIAL OFFICER)	Buy	6,200	15.39	95,393
2023-09-15	Mcgroddy-goetz Kathleen (Director)	Buy	1,000	21.45	21,450
2023-09-15	Carpenter Rick (Chief Technical Officer)	Option Ex	406	.00	0
2023-08-28	Leal James (Chief Manufacturing Officer)	Option Ex	310	.00	0
2023-08-28	Gasser Elizabeth Anne (EVP, Chief Strategy Officer)	Option Ex	372	.00	0
2023-08-28	Vosseller Leigh (EVP & CHIEF FINANCIAL OFFICER)	Option Ex	407	.00	0
2023-08-28	Morrison Susan (EVP & Chief Admin. Officer)	Option Ex	407	.00	0
2023-08-28	Hansen Brian B (EVP & CHIEF COMMERCIAL OFFICER)	Option Ex	407	.00	0
2023-08-28	Sheridan John F (PRESIDENT & CEO)	Option Ex	820	.00	0
2023-08-15	Hansen Shannon Marie (SVP & General Counsel)	Option Ex	531	.00	0
2023-08-15	Carpenter Rick (Chief Technical Officer)	Option Ex	595	.00	0
2023-08-15	Berger David B (EVP & Chief Operating Officer)	Option Ex	636	.00	0
2023-08-03	Howell Peyton R (Director)	Option Ex	949	.00	0
2023-06-15	Malagueira Joao Paulo Falcao (Director)	Option Ex	1,749	.00	0
2023-06-15	Cha Myoungil (Director)	Option Ex	1,749	.00	0
2023-06-15	Carpenter Rick (Chief Technical Officer)	Option Ex	406	.00	0
2023-06-08	Mcgroddy-goetz Kathleen (Director)	Option Ex	1,220	.00	0
2023-05-30	Leal James (Chief Manufacturing Officer)	Option Ex	309	.00	0
2023-05-30	Gasser Elizabeth Anne (EVP, Chief Strategy Officer)	Option Ex	373	.00	0
2023-05-30	Vosseller Leigh (EVP & CHIEF FINANCIAL OFFICER)	Option Ex	406	.00	0
2023-05-30	Morrison Susan (EVP & Chief Admin. Officer)	Option Ex	406	.00	0
2023-05-30	Hansen Brian B (EVP & CHIEF COMMERCIAL OFFICER)	Option Ex	406	.00	0
2023-05-30	Berger David B (EVP & Chief Operating Officer)	Option Ex	406	.00	0
2023-05-30	Sheridan John F (PRESIDENT & CEO)	Option Ex	820	.00	0
2023-05-25	Mcgroddy-goetz Kathleen	Option Ex	2,757	.00	0
2023-05-25	Sodhi Rajwant	Option Ex	2,757	.00	0
2023-05-25	Allen Dick	Option Ex	2,757	.00	0
2023-05-25	Howell Peyton R	Option Ex	2,757	.00	0
2023-05-25	Twomey Christopher J	Option Ex	2,757	.00	0
2023-05-25	Robertson Rebecca B	Option Ex	2,757	.00	0
2023-05-18	Allen Dick	Buy	10,000	29.47	294,690
2023-05-17	Howell Peyton R	Buy	3,000	30.16	90,492
2023-05-15	Hansen Shannon Marie (SVP & General Counsel)	Option Ex	531	.00	0
2023-05-15	Leal James (Chief Manufacturing Officer)	Option Ex	3,391	.00	0
2023-05-15	Gasser Elizabeth Anne (EVP, Chief Strategy Officer)	Option Ex	2,060	.00	0
2023-05-15	Vosseller Leigh (EVP & CHIEF FINANCIAL OFFICER)	Option Ex	2,060	.00	0
2023-05-15	Morrison Susan (EVP & Chief Admin. Officer)	Option Ex	2,060	.00	0
2023-05-15	Hansen Brian B (EVP & CHIEF COMMERCIAL OFFICER)	Option Ex	2,060	.00	0
2023-05-15	Carpenter Rick (Chief Technical Officer)	Option Ex	2,383	.00	0
2023-05-15	Berger David B (EVP & Chief Operating Officer)	Option Ex	2,060	.00	0
2023-05-15	Sheridan John F (PRESIDENT & CEO)	Option Ex	9,738	.00	0
2023-05-12	Vosseller Leigh (EVP & CHIEF FINANCIAL OFFICER)	Buy	3,015	32.77	98,804
2023-03-15	Carpenter Rick (Chief Technical Officer)	Option Ex	406	.00	0
2023-03-03	Berger David B (EVP & Chief Operating Officer)	Sale	10,000	41.19	411,880
2023-03-03	Berger David B (EVP & Chief Operating Officer)	Option Ex	10,000	18.86	188,600
2023-02-27	Leal James (SVP, Operations)	Option Ex	310	.00	0
2023-02-27	Gasser Elizabeth Anne (EVP, Chief Strategy Officer)	Option Ex	373	.00	0
2023-02-27	Vosseller Leigh (EVP & CHIEF FINANCIAL OFFICER)	Option Ex	407	.00	0
2023-02-27	Morrison Susan (EVP & Chief Admin. Officer)	Option Ex	407	.00	0
2023-02-27	Hansen Brian B (EVP & CHIEF COMMERCIAL OFFICER)	Option Ex	407	.00	0
2023-02-27	Berger David B (EVP & Chief Operating Officer)	Option Ex	407	.00	0
2023-02-27	Sheridan John F (PRESIDENT & CEO)	Option Ex	819	.00	0
2023-02-16	Hansen Shannon Marie (SVP & General Counsel)	Option Ex	2,123	.00	0

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Insider trading activities including stock purchases, stock sales, and option exercises of TNDM listed in the above tables cannot be completely guaranteed as to their accuracy. For more insider trading information of Tandem Diabetes Care Inc (symbol TNDM, CIK number 1438133) see the Securities and Exchange Commission (SEC) website.

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