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 $320.69 as of August 22, 2026, based on a reinvested dividends scenario. Over the same period, a $1000 investment made 5 years ago would be worth $200.54, while $1000 invested 1 year ago would be worth $1,870.91. This corresponds to total returns of -67.93%, -79.95%, 87.09%, respectively, with annualized returns of -10.74%, -27.48%, 87.09%.

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
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
July 27, 2026	17.13	17.17	17.17	17.27	16.34	1.58M
July 23, 2026	16.93	16.9	16.9	17.09	16.14	1.16M
July 22, 2026	17.55	16.91	16.91	17.55	16.78	1.53M
July 21, 2026	17.62	17.6	17.6	18.23	17.23	1.73M
July 20, 2026	16.95	18.1	18.1	18.16	16.7	1.89M
July 17, 2026	16.25	17.08	17.08	17.09	15.91	2.1M
July 16, 2026	15.37	16.29	16.29	16.72	15.34	1.98M
July 15, 2026	15.22	15.28	15.28	15.9	15.08	1.38M
July 14, 2026	15.75	15.54	15.54	16.03	14.58	1.88M
July 13, 2026	15.5	16.25	16.25	16.51	15.4	1.9M
July 10, 2026	15.46	15.41	15.41	15.5	15	1.32M
July 09, 2026	15.24	15.37	15.37	15.68	14.95	1.39M
July 08, 2026	15.17	15.16	15.16	15.45	14.89	1.87M
July 07, 2026	15.65	15.43	15.43	15.86	14.9	1.21M
July 06, 2026	15.2	15.42	15.42	15.59	14.8	1.32M
July 02, 2026	15.94	15.32	15.32	16.17	15.22	1.63M
July 01, 2026	15.1	15.75	15.75	15.77	15.1	1.31M
June 30, 2026	15.97	15.09	15.09	15.97	15.05	1.15M
June 29, 2026	16.24	15.83	15.83	16.43	15.58	1.47M
June 26, 2026	15.69	16.24	16.24	16.5	15.47	3.37M
June 25, 2026	15.12	15.76	15.76	15.98	15.01	2.3M
June 24, 2026	14.42	15.02	15.02	15.26	14.41	2.21M
June 23, 2026	14.17	14.41	14.41	14.49	13.95	3.18M
June 22, 2026	15.17	14.34	14.34	15.34	14.32	2.2M
June 18, 2026	15.68	15.3	15.3	15.86	15.08	2.51M
June 17, 2026	16.44	15.4	15.4	17.07	15.33	2.1M
June 16, 2026	16.95	16.69	16.69	17.2	16.6	1.89M
June 15, 2026	16.92	16.76	16.76	17.01	16.3	1.64M
June 12, 2026	15.56	16.6	16.6	16.64	15.51	1.81M
June 11, 2026	15.96	15.8	15.8	16.06	15.38	3.63M
June 10, 2026	17.5	16.23	16.23	17.69	15.93	2.87M
June 09, 2026	18.64	17.61	17.61	18.83	17.5	2.57M
June 08, 2026	19.53	18.47	18.47	20.18	18.44	2.99M
June 05, 2026	19.53	19.34	19.34	20.62	19.31	2.3M
June 04, 2026	18.52	19.45	19.45	19.78	18.32	2.41M
June 03, 2026	18.6	18.03	18.03	18.8	17.64	2.01M
June 02, 2026	18.83	18.6	18.6	19.13	18.33	1.43M
June 01, 2026	19.47	19.12	19.12	20.04	17.72	5.61M
May 29, 2026	16.83	17.2	17.2	18.28	16.8	3.01M
May 28, 2026	14.59	16.72	16.72	16.75	14.42	4.02M
May 27, 2026	14.69	14.82	14.82	14.99	14.11	2.76M