Tandem Diabetes Care, Inc. (TNDM) NASDAQ

Currency In USD

TNDM Historical Return

If you invested $1000 in Tandem Diabetes Care, Inc. (TNDM) 10 years ago, it would be worth $254.81 as of October 22, 2026, based on a reinvested dividends scenario. Over the same period, a $1000 investment made 5 years ago would be worth $133.24, while $1000 invested 1 year ago would be worth $1,132.69. This corresponds to total returns of -74.52%, -86.68%, 13.27%, respectively, with annualized returns of -12.78%, -33.16%, 13.27%.

Custom investment amounts or purchase dates can also be explored using the Stoculator calculator. Past performance does not guarantee future results.

TNDM Historical Data

Date Range:

Date	Open	Close	Adj Close	High	Low	Volume
October 21, 2026	16.6	16.35	16.35	16.95	16.12	1.53M
October 20, 2026	16.47	16.52	16.52	16.86	16.37	1.59M
October 19, 2026	16.23	16.38	16.38	16.52	16	1.27M
October 16, 2026	16.61	16.24	16.24	17.25	16.14	1.63M
October 15, 2026	16.01	16.52	16.52	16.55	15.61	4.59M
October 14, 2026	16.64	16.01	16.01	16.7	15.86	2.18M
October 13, 2026	16.24	16.65	16.65	16.8	15.72	1.71M
October 12, 2026	16.11	16.45	16.45	16.91	15.86	1.58M
October 09, 2026	15.64	16.11	16.11	16.13	15.38	1.43M
October 08, 2026	15.57	15.68	15.68	15.77	15.13	2.9M
October 07, 2026	15.8	15.84	15.84	16.64	15.73	2.27M
October 06, 2026	16.77	16.16	16.16	17.05	15.94	1.48M
October 05, 2026	16.5	16.52	16.52	16.95	16.14	1.79M
October 02, 2026	16.66	16.5	16.5	17.35	16.27	2.19M
October 01, 2026	16.42	16.5	16.5	16.58	16.04	2.4M
September 30, 2026	16.63	16.31	16.31	16.68	16	2.2M
September 29, 2026	16.24	16.57	16.57	16.65	15.87	1.85M
September 28, 2026	15.6	16.42	16.42	16.54	15.52	2.85M
September 25, 2026	15.2	15.72	15.72	16.18	14.83	2.79M
September 24, 2026	16.43	15.22	15.22	16.6	15.2	2.65M
September 23, 2026	17.44	16.38	16.38	17.67	15.87	2.81M
September 22, 2026	17.88	17.5	17.5	18.03	16.97	2.69M
September 21, 2026	17.01	17.62	17.62	17.83	16.6	2.1M
September 18, 2026	17.13	16.87	16.87	17.15	16.77	2.28M
September 17, 2026	17.72	17.23	17.23	17.72	16.93	2.22M
September 16, 2026	16.31	17.53	17.53	18	16.12	3.87M
September 15, 2026	16.66	16.28	16.28	17.01	16.25	2.34M
September 11, 2026	18.48	17.11	17.11	18.67	17.07	1.79M
September 10, 2026	18.77	18.31	18.31	19.05	18.1	1.59M
September 09, 2026	19.67	19.11	19.11	19.73	19.04	1.57M
September 08, 2026	19.51	19.88	19.88	20.62	19.34	1.64M
September 04, 2026	20.04	19.9	19.9	20.36	19.49	1.36M
September 03, 2026	20.71	20.43	20.43	20.91	20.03	1.59M
September 02, 2026	21.25	20.56	20.56	21.74	20.54	1.13M
September 01, 2026	21.98	21.28	21.28	22.21	21.08	919,253
August 31, 2026	21	22.01	22.01	22.3	20.56	1.61M
August 28, 2026	21.4	21.43	21.43	21.77	21.22	921,790
August 27, 2026	21.2	21.4	21.4	21.94	21.02	1.03M
August 26, 2026	21.24	21.37	21.37	21.59	21.02	1.12M
August 25, 2026	22.16	21.58	21.58	22.16	21.3	1.19M
August 24, 2026	22.4	22.22	22.22	23	22.06	1.06M
August 21, 2026	23.25	22.32	22.32	23.25	22.06	1.64M
August 20, 2026	23.11	22.57	22.57	23.53	22.22	1.78M
August 19, 2026	24.2	23.46	23.46	24.81	23.42	1.66M
August 18, 2026	22.16	23.73	23.73	24.1	22.1	2.59M
August 17, 2026	22.5	22.26	22.26	22.94	21.7	1.36M
August 14, 2026	22.92	22.72	22.72	22.92	22.36	1.68M
August 13, 2026	23.33	23.13	23.13	23.56	22.88	1.4M
August 12, 2026	23.16	23.44	23.44	23.61	22.71	1.66M
August 11, 2026	22.62	23.44	23.44	23.8	22.56	1.78M
August 10, 2026	22.03	22.81	22.81	23.03	21.83	2.29M
August 07, 2026	17.39	22.38	22.38	22.65	17.07	5.43M
August 06, 2026	19.3	18.79	18.79	19.55	18.5	3.78M
August 05, 2026	19.25	19.59	19.59	19.86	19	3.4M
August 04, 2026	19.95	20.2	20.2	20.81	19.61	2.82M
August 03, 2026	19.82	20.11	20.11	20.5	19.73	3.33M
July 31, 2026	19.1	19.5	19.5	19.66	18.56	1.83M
July 30, 2026	18.31	19.01	19.01	19.04	18.03	2.06M
July 29, 2026	17.79	18.59	18.59	18.75	17.42	1.91M
July 28, 2026	17.17	17.76	17.76	18.04	17.17	1.86M