Tandem Diabetes Care Inc (TNDM) — Price History

As of 2026-10-30 — refreshed nightly from the Closelooknet data lake. Diary readings, not advice.

The Closelooknet read

Signal: Recovery attempt under the 200-day — Trades +6% vs the 50-day and +0.9% vs the 200-day average, 35.5% below the 52-week high and +55.9% off the 52-week low; a death cross printed 14 sessions ago. Computed from daily closes. (as of 2026-10-30)
Trend: Tandem Diabetes Care Inc trades 6.0% above its 50-day and 0.9% above its 200-day moving average. (as of 2026-10-30)

Tandem Diabetes Care designs and sells insulin delivery systems for people with diabetes, built around its t:slim X2 pump and the newer Tandem Mobi wearable pump. It also sells the disposable cartridges and infusion sets these pumps use, plus software such as Tandem Source that lets patients and clinicians review therapy data.

The full read — the desk's view, the earnings record, peers and the company snapshot — is on the TNDM overview; the trend detail on the technical tab. Research diary readings, not advice.

Daily prices

Date	Open	High	Low	Close	Chg %	Volume
2026-10-30	19.42	19.59	18.71	19.11	-3.44%	1,874,190
2026-10-29	19.71	20.25	19.46	19.79	+0.56%	3,357,400
2026-10-28	18.93	19.71	18.75	19.68	+2.39%	2,137,700
2026-10-27	18.73	19.25	18.18	19.22	+1.69%	2,059,600
2026-10-26	17.42	18.98	17.21	18.90	+8.43%	4,487,700
2026-10-23	17.06	17.56	16.89	17.43	+1.63%	1,820,100
2026-10-22	16.47	17.20	16.24	17.15	+4.89%	1,871,200
2026-10-21	16.60	16.95	16.12	16.35	-1.03%	1,532,400
2026-10-20	16.47	16.86	16.37	16.52	+0.85%	1,587,000
2026-10-19	16.23	16.52	16.00	16.38	+0.86%	1,272,400
2026-10-16	16.61	17.25	16.14	16.24	-1.69%	1,634,300
2026-10-15	16.01	16.55	15.61	16.52	+3.19%	4,589,800
2026-10-14	16.64	16.70	15.86	16.01	-3.84%	2,221,700
2026-10-13	16.23	16.80	15.71	16.65	+1.22%	1,708,700
2026-10-12	16.11	16.91	15.86	16.45	+2.11%	1,579,700
2026-10-09	15.64	16.13	15.38	16.11	+2.78%	1,431,400
2026-10-08	15.57	15.77	15.13	15.68	-1.04%	2,899,000
2026-10-07	15.80	16.64	15.73	15.84	-1.98%	2,273,400
2026-10-06	16.77	17.05	15.94	16.16	-2.18%	1,484,900
2026-10-05	16.50	16.95	16.14	16.52	+0.12%	1,790,300
2026-10-02	16.66	17.35	16.27	16.50	+0.00%	2,191,600
2026-10-01	16.42	16.58	16.04	16.50	+1.16%	2,402,300
2026-09-30	16.63	16.68	16.00	16.31	-1.57%	2,198,700
2026-09-29	16.24	16.64	15.87	16.57	+0.91%	1,892,500
2026-09-28	15.60	16.54	15.52	16.42	+4.45%	2,852,500
2026-09-25	15.20	16.18	14.83	15.72	+3.29%	2,838,500
2026-09-24	16.43	16.60	15.20	15.22	-7.08%	2,651,100
2026-09-23	17.44	17.67	15.87	16.38	-6.40%	2,806,000
2026-09-22	17.88	18.03	16.97	17.50	-0.68%	2,688,200
2026-09-21	17.01	17.83	16.60	17.62	+4.45%	2,101,600
2026-09-18	17.13	17.15	16.77	16.87	-2.09%	2,284,200
2026-09-17	17.72	17.72	16.93	17.23	-1.71%	2,218,200
2026-09-16	16.30	18.00	16.12	17.53	+7.68%	3,866,500
2026-09-15	16.66	17.00	16.25	16.28	-3.15%	2,379,400
2026-09-14	17.18	17.62	16.60	16.81	-1.75%	2,201,500
2026-09-11	18.48	18.67	17.07	17.11	-6.55%	1,788,500
2026-09-10	18.77	19.05	18.09	18.31	-4.19%	1,589,500
2026-09-09	19.67	19.73	19.04	19.11	-3.87%	1,569,600
2026-09-08	19.51	20.62	19.34	19.88	-0.10%	1,637,100
2026-09-04	20.04	20.36	19.49	19.90	-2.59%	1,363,500
2026-09-03	20.71	20.91	20.03	20.43	-0.63%	1,593,500
2026-09-02	21.25	21.73	20.54	20.56	-3.38%	1,136,300
2026-09-01	21.98	22.21	21.08	21.28	-3.32%	919,300
2026-08-31	21.00	22.30	20.56	22.01	+2.71%	1,657,000
2026-08-28	21.40	21.77	21.22	21.43	+0.14%	921,800
2026-08-27	21.20	21.94	21.02	21.40	+0.14%	1,031,200
2026-08-26	21.24	21.59	21.02	21.37	-0.97%	1,117,100
2026-08-25	22.16	22.16	21.30	21.58	-2.88%	1,186,486
2026-08-24	22.40	23.00	22.06	22.22	-0.45%	1,064,351
2026-08-21	23.25	23.25	22.06	22.32	-1.11%	1,636,300
2026-08-20	23.11	23.53	22.22	22.57	-3.79%	1,820,900
2026-08-19	24.20	24.81	23.42	23.46	-1.14%	1,655,400
2026-08-18	22.16	24.10	22.10	23.73	+6.63%	2,631,300
2026-08-17	22.50	22.94	21.70	22.25	-2.05%	1,384,200
2026-08-14	22.92	22.92	22.36	22.72	-1.77%	1,686,900
2026-08-13	23.33	23.55	22.88	23.13	-1.32%	1,419,900
2026-08-12	23.16	23.61	22.71	23.44	+0.00%	1,700,500
2026-08-11	22.61	23.80	22.56	23.44	+2.76%	1,784,900
2026-08-10	22.03	23.03	21.82	22.81	+1.92%	2,320,700
2026-08-07	17.39	22.65	17.07	22.38	+19.11%	5,435,900
2026-08-06	19.30	19.55	18.50	18.79	-4.08%	3,796,500
2026-08-05	19.25	19.86	19.00	19.59	-3.02%	3,470,800
2026-08-04	19.95	20.81	19.61	20.20	+0.45%	2,822,100
2026-08-03	19.82	20.50	19.73	20.11	+3.13%	3,327,800
2026-07-31	19.10	19.66	18.56	19.50	+2.58%	1,834,000
2026-07-30	18.31	19.04	18.03	19.01	+2.26%	2,056,800
2026-07-29	17.79	18.75	17.42	18.59	+4.67%	1,910,600
2026-07-28	17.17	18.04	17.17	17.76	+3.44%	1,861,000
2026-07-27	17.13	17.27	16.34	17.17	+0.29%	1,577,400
2026-07-24	17.09	17.26	16.49	17.12	+1.30%	1,148,000
2026-07-23	16.93	17.09	16.14	16.90	-0.06%	1,160,000
2026-07-22	17.55	17.55	16.78	16.91	-3.92%	1,533,800
2026-07-21	17.62	18.23	17.23	17.60	-2.76%	1,734,000
2026-07-20	16.95	18.16	16.70	18.10	+5.97%	1,893,900
2026-07-17	16.25	17.09	15.91	17.08	+4.85%	2,100,400
2026-07-16	15.37	16.72	15.34	16.29	+6.61%	1,982,800
2026-07-15	15.22	15.90	15.08	15.28	-1.67%	1,381,900
2026-07-14	15.75	16.03	14.57	15.54	-4.37%	1,882,900
2026-07-13	15.50	16.50	15.40	16.25	+5.45%	1,897,000
2026-07-10	15.46	15.50	15.00	15.41	+0.26%	1,321,200
2026-07-09	15.24	15.68	14.95	15.37	+1.39%	1,398,300
2026-07-08	15.17	15.45	14.89	15.16	-1.75%	1,871,100
2026-07-07	15.65	15.86	14.90	15.43	+0.06%	1,207,500
2026-07-06	15.20	15.59	14.80	15.42	+0.65%	1,322,400
2026-07-02	15.94	16.16	15.22	15.32	-2.73%	1,627,600
2026-07-01	15.10	15.77	15.10	15.75	+4.37%	1,312,700
2026-06-30	15.96	15.96	15.05	15.09	-4.67%	1,145,900
2026-06-29	16.24	16.43	15.58	15.83	-2.52%	1,467,200
2026-06-26	15.69	16.50	15.46	16.24	+3.05%	3,369,100
2026-06-25	15.12	15.98	15.01	15.76	+4.93%	2,304,900
2026-06-24	14.42	15.26	14.41	15.02	+4.23%	2,206,500
2026-06-23	14.17	14.48	13.95	14.41	+0.49%	3,498,100
2026-06-22	15.17	15.34	14.32	14.34	-6.27%	2,451,800
2026-06-18	15.68	15.86	15.08	15.30	-0.65%	2,537,800
2026-06-17	16.44	17.07	15.33	15.40	-7.73%	2,103,000
2026-06-16	16.95	17.20	16.60	16.69	-0.42%	1,905,500
2026-06-15	16.92	17.01	16.30	16.76	+0.96%	1,682,900
2026-06-12	15.56	16.64	15.51	16.60	+5.06%	1,925,500
2026-06-11	15.96	16.06	15.38	15.80	-2.65%	3,631,100
2026-06-10	17.50	17.69	15.93	16.23	-7.84%	2,905,200
2026-06-09	18.64	18.83	17.50	17.61	-4.66%	2,637,900
2026-06-08	19.53	20.18	18.44	18.47	-4.50%	2,995,000
2026-06-05	19.53	20.62	19.31	19.34	-0.57%	2,305,200
2026-06-04	18.52	19.78	18.32	19.45	+7.88%	2,415,500
2026-06-03	18.60	18.80	17.64	18.03	-3.06%	2,362,000
2026-06-02	18.83	19.13	18.33	18.60	-2.72%	1,428,400
2026-06-01	19.47	20.04	17.72	19.12	+11.16%	5,618,600
2026-05-29	16.83	18.28	16.80	17.20	+2.87%	3,009,800
2026-05-28	14.59	16.75	14.42	16.72	+12.82%	4,029,400
2026-05-27	14.69	14.99	14.11	14.82	+1.93%	2,758,300
2026-05-26	15.07	15.35	14.53	14.54	-2.84%	2,845,600
2026-05-22	15.74	15.92	14.94	14.96	-5.04%	1,988,900
2026-05-21	14.94	15.86	14.80	15.76	+4.79%	2,780,200
2026-05-20	13.89	15.10	13.61	15.04	+8.51%	1,715,700
2026-05-19	13.53	14.03	13.47	13.86	+2.44%	1,995,400
2026-05-18	13.15	13.67	12.83	13.53	+5.54%	4,718,300
2026-05-15	13.65	13.68	12.26	12.82	-9.40%	6,098,300
2026-05-14	14.17	14.69	13.96	14.15	+0.28%	2,770,800
2026-05-13	14.41	14.83	13.95	14.11	-3.95%	2,640,200
2026-05-12	14.74	15.34	14.42	14.69	-0.54%	2,367,500
2026-05-11	15.16	15.35	14.18	14.77	-4.59%	3,647,400
2026-05-08	20.00	20.03	15.44	15.48	-16.19%	7,532,600
2026-05-07	18.30	18.90	17.75	18.47	+2.44%	2,628,900
2026-05-06	19.48	19.48	17.93	18.03	-7.16%	3,131,800
2026-05-05	19.90	19.98	18.91	19.42	-2.26%	1,624,600
2026-05-04	19.62	20.44	19.15	19.87	+2.32%	2,072,300
2026-05-01	19.63	20.02	19.18	19.42	-0.54%	1,618,000
2026-04-30	18.32	19.66	18.25	19.52	+7.52%	2,221,400
2026-04-29	18.47	18.47	17.59	18.16	-2.52%	2,166,900
2026-04-28	19.86	20.08	18.57	18.63	-6.00%	1,470,300
2026-04-27	20.20	20.49	19.69	19.82	-2.65%	1,195,300
2026-04-24	20.88	21.11	20.15	20.36	-1.55%	883,300
2026-04-23	20.83	21.62	20.10	20.68	-0.48%	2,210,600
2026-04-22	20.29	20.98	20.00	20.78	+3.74%	1,301,000
2026-04-21	21.35	21.54	19.99	20.03	-5.70%	1,340,700
2026-04-20	20.88	21.86	20.79	21.24	+3.06%	1,718,600
2026-04-17	20.68	21.32	20.36	20.61	+2.59%	1,982,800
2026-04-16	20.60	21.05	20.01	20.09	-2.76%	1,188,300
2026-04-15	21.47	21.96	20.40	20.66	-2.13%	1,340,300
2026-04-14	20.33	21.12	20.05	21.11	+5.02%	2,579,500
2026-04-13	18.91	20.30	18.91	20.10	+4.80%	1,111,000
2026-04-10	19.71	19.82	18.91	19.18	-2.54%	926,400
2026-04-09	19.34	19.84	18.91	19.68	+1.71%	982,500
2026-04-08	19.32	19.77	18.79	19.35	+5.85%	1,919,500
2026-04-07	19.19	19.71	18.11	18.28	-4.64%	1,725,100
2026-04-06	18.46	19.34	18.34	19.17	+3.01%	1,573,100
2026-04-02	18.25	19.09	18.08	18.61	-1.06%	1,034,200
2026-04-01	19.22	19.47	18.29	18.81	-1.88%	1,870,600
2026-03-31	19.62	20.30	18.89	19.17	-2.12%	1,819,700
2026-03-30	21.20	21.35	19.54	19.59	-6.74%	2,053,100
2026-03-27	22.82	22.97	20.93	21.00	-9.95%	2,389,500
2026-03-26	23.81	24.30	22.98	23.32	-3.87%	1,805,600
2026-03-25	24.76	25.05	23.79	24.26	-1.02%	1,212,900
2026-03-24	24.65	24.89	24.03	24.51	-2.31%	2,019,000
2026-03-23	25.87	26.38	24.96	25.09	+1.09%	2,170,200
2026-03-20	24.69	25.01	23.91	24.82	+0.77%	2,424,100
2026-03-19	25.04	25.43	24.18	24.63	+3.27%	2,829,800
2026-03-18	23.91	24.45	23.56	23.85	-0.25%	1,680,500
2026-03-17	23.16	24.79	23.03	23.91	+9.13%	3,611,100
2026-03-16	21.79	22.34	21.42	21.91	+1.48%	1,362,100
2026-03-13	21.03	21.85	20.91	21.59	+3.43%	2,052,100
2026-03-12	21.51	22.06	20.69	20.88	-5.80%	1,419,100
2026-03-11	21.57	22.54	21.14	22.16	+1.28%	1,929,600
2026-03-10	21.24	22.11	20.43	21.88	+4.79%	1,533,314
2026-03-09	20.60	21.28	20.17	20.88	-1.23%	2,097,599
2026-03-06	22.12	22.59	21.02	21.14	-6.58%	1,797,700
2026-03-05	22.81	23.22	22.31	22.63	-3.33%	1,543,000
2026-03-04	23.92	24.48	23.38	23.41	-1.39%	1,762,200
2026-03-03	24.41	24.64	23.61	23.74	-5.91%	2,160,400
2026-03-02	24.88	25.39	24.32	25.23	-0.28%	1,545,600
2026-02-27	26.09	26.09	24.93	25.30	-1.90%	1,815,400
2026-02-26	25.98	26.88	25.57	25.79	-0.85%	2,826,000
2026-02-25	26.91	27.05	25.62	26.01	-3.31%	7,435,100
2026-02-24	25.71	29.65	25.70	26.90	-4.81%	6,671,700
2026-02-23	25.59	28.90	24.77	28.26	+15.02%	6,654,300
2026-02-20	22.75	26.21	22.00	24.57	+32.67%	12,699,000
2026-02-19	18.95	19.09	17.71	18.52	-2.22%	1,992,100
2026-02-18	19.14	19.27	18.45	18.94	+0.53%	1,518,200
2026-02-17	19.00	19.55	18.68	18.84	-0.58%	1,235,000
2026-02-13	18.95	19.50	18.49	18.95	+1.39%	753,131
2026-02-12	19.63	19.81	18.34	18.69	-4.93%	975,431
2026-02-11	19.47	19.92	18.50	19.66	+0.61%	1,296,649
2026-02-10	19.13	20.27	18.90	19.54	+3.44%	1,071,285
2026-02-09	19.34	19.39	18.81	18.89	-1.46%	781,377
2026-02-06	19.04	19.53	18.99	19.17	+1.21%	738,205
2026-02-05	18.80	19.32	18.63	18.94	-0.26%	837,816
2026-02-04	19.44	19.99	18.63	18.99	-2.31%	1,336,958
2026-02-03	20.13	20.88	19.18	19.44	-3.24%	923,225
2026-02-02	19.89	20.95	19.57	20.09	+1.01%	1,137,126
2026-01-30	19.57	20.32	19.04	19.89	+0.66%	1,672,137
2026-01-29	19.05	19.86	18.90	19.76	+3.40%	2,039,071
2026-01-28	20.19	20.20	19.06	19.11	-5.16%	1,128,957
2026-01-27	20.22	20.60	19.75	20.15	-0.25%	1,032,321
2026-01-26	19.80	20.52	19.75	20.20	+1.51%	851,481
2026-01-23	20.45	20.75	19.76	19.90	-3.35%	1,174,919
2026-01-22	20.72	21.64	20.42	20.59	-0.72%	2,014,476
2026-01-21	20.93	21.25	20.34	20.74	+1.22%	1,140,740
2026-01-20	19.97	20.64	19.61	20.49	+1.64%	1,345,561
2026-01-16	20.83	21.98	20.11	20.16	-4.32%	1,377,238
2026-01-15	20.80	21.35	20.53	21.07	+0.96%	1,099,176
2026-01-14	20.75	20.97	20.20	20.87	-0.14%	1,048,098
2026-01-13	21.38	21.43	20.41	20.90	-2.11%	1,640,263
2026-01-12	21.64	22.14	21.15	21.35	-1.61%	1,245,742
2026-01-09	23.03	23.11	20.29	21.70	-3.56%	2,399,863
2026-01-08	22.71	23.35	22.06	22.50	-0.92%	1,211,208
2026-01-07	23.55	23.58	22.71	22.71	-3.53%	920,109
2026-01-06	23.27	23.95	22.99	23.54	+1.68%	1,052,678
2026-01-05	21.50	23.18	21.35	23.15	+7.42%	1,784,407
2026-01-02	22.31	22.45	21.55	21.55	-1.96%	993,154
2025-12-31	22.31	22.45	21.98	21.98	-2.35%	815,090
2025-12-30	22.32	22.55	22.17	22.51	+0.81%	671,854
2025-12-29	22.35	22.68	21.97	22.33	-0.09%	784,819
2025-12-26	22.48	22.48	22.13	22.35	-0.58%	830,112
2025-12-24	22.43	22.79	22.12	22.48	-0.62%	597,738
2025-12-23	23.01	23.28	22.51	22.62	-2.75%	1,133,087
2025-12-22	22.09	24.06	22.05	23.26	+5.39%	1,615,100
2025-12-19	21.80	22.37	21.75	22.07	+1.24%	1,900,149
2025-12-18	22.44	22.73	21.77	21.80	-2.77%	1,142,012
2025-12-17	22.67	23.10	22.30	22.42	-0.80%	1,796,047
2025-12-16	24.46	24.50	22.13	22.60	+2.22%	2,863,097
2025-12-15	21.61	22.16	21.32	22.11	+3.37%	1,803,354
2025-12-12	21.31	21.68	20.56	21.39	+2.00%	1,564,298
2025-12-11	20.78	21.81	20.42	20.97	-2.24%	1,882,943
2025-12-10	20.41	22.09	20.27	21.45	+4.94%	2,690,638
2025-12-09	20.79	21.05	20.30	20.44	-1.45%	1,959,921
2025-12-08	21.01	21.28	20.20	20.74	-0.86%	973,847
2025-12-05	20.74	21.36	20.51	20.92	+1.01%	1,405,601
2025-12-04	19.78	20.77	19.70	20.71	+3.91%	1,211,310
2025-12-03	19.62	20.62	19.47	19.93	+1.58%	1,856,968
2025-12-02	20.73	21.07	19.48	19.62	-4.34%	2,255,303
2025-12-01	19.98	20.53	19.33	20.51	-2.38%	2,123,400
2025-11-28	20.82	21.16	20.24	21.01	+1.35%	942,513
2025-11-26	21.74	21.82	20.61	20.73	-5.08%	1,876,197
2025-11-25	21.50	22.13	21.26	21.84	+1.72%	2,352,762
2025-11-24	21.16	21.77	20.91	21.47	+0.89%	4,184,949
2025-11-21	19.48	21.48	19.35	21.28	+9.13%	3,265,354
2025-11-20	18.97	20.13	18.91	19.50	+4.06%	3,414,710
2025-11-19	18.71	19.07	18.57	18.74	+0.16%	1,990,821
2025-11-18	18.14	19.23	17.86	18.71	+2.02%	5,422,821
2025-11-17	18.61	19.28	18.11	18.34	-1.45%	1,996,358
2025-11-14	17.01	18.70	16.95	18.61	+6.16%	2,460,427
2025-11-13	17.97	18.17	17.41	17.53	-2.93%	2,090,371
2025-11-12	17.39	18.64	17.20	18.06	+3.08%	2,635,069
2025-11-11	16.52	18.40	16.39	17.52	+7.03%	3,513,489
2025-11-10	16.51	16.69	15.50	16.37	+0.68%	3,312,586
2025-11-07	16.00	16.70	15.20	16.26	+21.98%	6,035,292
2025-11-06	14.61	14.82	13.23	13.33	-9.13%	2,814,966
2025-11-05	15.20	15.30	14.45	14.67	-3.55%	1,570,892
2025-11-04	14.23	15.36	14.14	15.21	+5.92%	2,472,862
2025-11-03	14.17	14.42	13.69	14.36	+2.57%	1,860,795

Most recent 250 sessions, newest first.

Seasonal returns

Best month historically: Dec (+15.76%). Worst month: Sep (-13.06%). Based on 5 years of daily data (2022–2026).

Jan-8.10%
Feb-3.54%
Mar+1.80%
Apr+0.64%
May-1.42%
Jun-12.87%
Jul+12.38%
Aug-0.23%
Sep-13.06%
Oct-5.29%
Nov+7.85%
Dec+15.76%

FAQ · from the current price data · as of 2026-10-30

Quick answers

What is Tandem Diabetes Care Inc's (TNDM) latest close?

19.11 on 2026-10-30, from the Closelook data lake's daily price record.

What is TNDM's 52-week high and low?

29.65 high and 12.26 low over the trailing 52 weeks, as of 2026-10-30.

What is Tandem Diabetes Care Inc's strongest and weakest month historically?

Historically, TNDM's strongest calendar month has been Dec (average +15.76%) and its weakest Sep (average -13.06%), based on 5 years of daily data (2022–2026).

How many years of seasonality does this cover?

5 years (2022–2026), computed from 1024 daily bars in the Closelook data lake.

What is the current Closelooknet signal on TNDM?

Recovery attempt under the 200-day: Trades +6% vs the 50-day and +0.9% vs the 200-day average, 35.5% below the 52-week high and +55.9% off the 52-week low; a death cross printed 14 sessions ago. Computed from daily closes. As of 2026-10-30. A research diary reading, not advice.

Is TNDM above its 50-day and 200-day moving averages?

Tandem Diabetes Care Inc trades 6.0% above its 50-day and 0.9% above its 200-day moving average (11.5% above its 20-day). As of 2026-10-30.