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TNDM
Tandem Diabetes Care, Inc.
stock NASDAQ

At Close

Aug 14, 2026 3:59:57 PM EDT

22.70USD-1.859%(-0.43)1,682,807

22.70Bid 25.69Ask 2.99Spread

Pre-market

Aug 14, 2026 9:17:30 AM EDT

22.73USD-1.729%(-0.40)6,934

After-hours

Aug 14, 2026 4:34:30 PM EDT

22.65USD-0.220%(-0.05)150

OverviewOption ChainHistoricalExchangesShortsMore

Expiration Dates

Aug 21, 2026 Sep 18, 2026 Nov 20, 2026 Jan 15, 2027 Feb 19, 2027

ITM/OTM for Aug 21, 2026View All Dates

Calls ITM	Calls OTM	Puts ITM	Puts OTM
1,238	4,144	107	2,859

TNDM Aug 21, 2026 Exp. - Volume by Strike

Puts

Calls

TNDM Aug 21, 2026 Exp. - Open Interest by Strike

Puts

Calls

TNDM Aug 21, 2026 Exp. - Max Pain @ $19.00

Puts

Calls

TNDM Aug 21, 2026 Exp. - Option Chain

In the Money (ITM)

Calls

Strike	Price	Change	Vol	OI	Last	Contract Name
43 C	0	0%	0			TNDM260821C00043000
42 C	0.05	-92.31%	1	15	05-22	TNDM260821C00042000
41 C	0.75	-16.67%	1	2	03-17	TNDM260821C00041000
40 C	0.05	-98.00%	1	1	05-18	TNDM260821C00040000
39 C	1.40	0%	1	1	03-04	TNDM260821C00039000
38 C	1.29	0%	6	6	03-23	TNDM260821C00038000
37 C	0.64	+82.86%	3	3	06-01	TNDM260821C00037000
36 C	0.64	+82.86%	1	4	06-01	TNDM260821C00036000
35 C	0.10	-33.33%	10	25	08-11	TNDM260821C00035000
34 C	0.05	-90.00%	5	9	06-24	TNDM260821C00034000
33 C	0.62	-4.62%	1	7	06-05	TNDM260821C00033000
32 C	0.55	-21.43%	1	13	06-05	TNDM260821C00032000
31 C	0.92	0%	2	0	04-21	TNDM260821C00031000
30 C	0.05	-92.31%	1	107	07-06	TNDM260821C00030000
29 C	0.82	-34.40%	10	102	05-06	TNDM260821C00029000
28 C	0.20	-20.00%	3	53	07-31	TNDM260821C00028000
27 C	0.35	+75.00%	3	73	08-03	TNDM260821C00027000
26 C	0.35	-12.50%	9	145	08-06	TNDM260821C00026000
25 C	0.45	-30.77%	1	2,528	08-13	TNDM260821C00025000
24 C	0.75	+7.14%	21	57	08-10	TNDM260821C00024000
23 C	0.85	-39.29%	6	993	08-12	TNDM260821C00023000
22 C	2.10	+28.05%	3	86	08-11	TNDM260821C00022000
21 C	2.90	+94.63%	1	68	08-13	TNDM260821C00021000
20 C	3.50	+2.34%	1	373	08-12	TNDM260821C00020000
19 C	3.92	+40.00%	2	189	08-10	TNDM260821C00019000
18 C	5.65	+13.00%	1	155	08-13	TNDM260821C00018000
17 C	3.89	+0.52%	1	37	08-04	TNDM260821C00017000
16 C	6.55	+37.89%	17	181	08-11	TNDM260821C00016000
15 C	8.32	+4.79%	4	46	08-11	TNDM260821C00015000
14 C	6.55	+0.15%	1	15	08-04	TNDM260821C00014000
13 C	9.44	+37.81%	5	5	08-10	TNDM260821C00013000
12 C	0	0%	0			TNDM260821C00012000
11 C	4.80	+6.67%	14	52	06-30	TNDM260821C00011000
10 C	0	0%	0			TNDM260821C00010000
9 C	8.84	-8.87%	2	24	07-28	TNDM260821C00009000
8 C	9.80	0%	2	1	07-28	TNDM260821C00008000
7 C	0	0%	0			TNDM260821C00007000
6 C	9.90	0%	2	1	07-15	TNDM260821C00006000
5 C	10.55	+2.43%	6	3	07-14	TNDM260821C00005000
4 C	11.60	+1.75%	2	1	07-14	TNDM260821C00004000
3 C	12.65	+0.40%	2	1	07-14	TNDM260821C00003000

Puts

Strike	Price	Change	Vol	OI	Last	Contract Name
43 P	0	0%	0			TNDM260821P00043000
42 P	0	0%	0			TNDM260821P00042000
41 P	0	0%	0			TNDM260821P00041000
40 P	0	0%	0			TNDM260821P00040000
39 P	0	0%	0			TNDM260821P00039000
38 P	0	0%	0			TNDM260821P00038000
37 P	0	0%	0			TNDM260821P00037000
36 P	0	0%	0			TNDM260821P00036000
35 P	19.50	+1.04%	4	2	07-02	TNDM260821P00035000
34 P	18.75	+1.90%	2	2	07-06	TNDM260821P00034000
33 P	17.55	0%	2	0	07-02	TNDM260821P00033000
32 P	16.27	-1.75%	4	2	07-15	TNDM260821P00032000
31 P	15.32	-1.16%	2	2	07-15	TNDM260821P00031000
30 P	14.30	-1.45%	2	1	07-15	TNDM260821P00030000
29 P	13.70	+47.31%	2	14	06-30	TNDM260821P00029000
28 P	5.00	-60.32%	15	1	08-13	TNDM260821P00028000
27 P	0	0%	0			TNDM260821P00027000
26 P	10.75	+41.45%	2	2	06-30	TNDM260821P00026000
25 P	2.70	-70.00%	60	72	08-12	TNDM260821P00025000
24 P	10.95	+73.81%	1	1	05-18	TNDM260821P00024000
23 P	8.00	+86.05%	1	8	05-26	TNDM260821P00023000
22 P	4.14	-28.00%	1	1	02-20	TNDM260821P00022000
21 P	3.50	-57.06%	3	40	06-05	TNDM260821P00021000
20 P	0.50	-72.07%	1	73	08-10	TNDM260821P00020000
19 P	0.30	-28.57%	4	2,016	08-10	TNDM260821P00019000
18 P	0.17	-41.38%	25	100	08-10	TNDM260821P00018000
17 P	1.10	+57.14%	36	59	08-06	TNDM260821P00017000
16 P	0.10	-87.01%	2,000	209	08-07	TNDM260821P00016000
15 P	0.05	-50.00%	1	37	08-10	TNDM260821P00015000
14 P	0.45	-10.00%	2	19	08-04	TNDM260821P00014000
13 P	0.40	+400.00%	4	26	08-10	TNDM260821P00013000
12 P	0.05	-78.26%	2	26	08-12	TNDM260821P00012000
11 P	0.28	+24.44%	2	205	08-04	TNDM260821P00011000
10 P	0.37	+640.00%	4	42	08-10	TNDM260821P00010000
9 P	0	0%	0			TNDM260821P00009000
8 P	0.32	0%	5	5	07-06	TNDM260821P00008000
7 P	0	0%	0			TNDM260821P00007000
6 P	0	0%	0			TNDM260821P00006000
5 P	0.10	0%	1	1	03-31	TNDM260821P00005000
4 P	0	0%	0			TNDM260821P00004000
3 P	0	0%	0			TNDM260821P00003000