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TAC
TransAlta Corporation
stock NYSE

At Close

May 13, 2026 3:59:59 PM EDT

12.73USD+1.192%(+0.15)579,712

12.72Bid 12.73Ask 0.01Spread

Pre-market

May 13, 2026 8:30:30 AM EDT

12.90USD+2.544%(+0.32)210

After-hours

May 13, 2026 4:10:30 PM EDT

12.73USD0.000%(0.00)48,308

OverviewOption ChainHistoricalExchangesShortsMore

Expiration Dates

May 15, 2026 Jun 18, 2026 Aug 21, 2026 Sep 18, 2026 Nov 20, 2026 Dec 18, 2026

ITM/OTM for May 15, 2026View All Dates

Calls ITM	Calls OTM	Puts ITM	Puts OTM
393	6,931	315	736

TAC May 15, 2026 Exp. - Volume by Strike

Puts

Calls

TAC May 15, 2026 Exp. - Open Interest by Strike

Puts

Calls

TAC May 15, 2026 Exp. - Max Pain @ $12.00

Puts

Calls

TAC May 15, 2026 Exp. - Option Chain

In the Money (ITM)

Calls

Strike	Price	Change	Vol	OI	Last	Contract Name
35 C	0.10	-75.00%	1	2	04-21	TAC260515C00035000
30 C	1.00	+42.86%	1	52	11-05	TAC260515C00030000
29 C	0	0%	0			TAC260515C00029000
28 C	0.10	-77.78%	1	6	04-21	TAC260515C00028000
27 C	1.30	0%	20	20	10-16	TAC260515C00027000
26 C	0	0%	0			TAC260515C00026000
25 C	1.17	-10.00%	30	93	11-03	TAC260515C00025000
24 C	0.36	0%	3	3	11-17	TAC260515C00024000
23 C	0.40	-66.67%	1	12	11-26	TAC260515C00023000
22 C	0.35	-22.22%	2	10	12-12	TAC260515C00022000
21 C	0.45	-18.18%	2	41	12-12	TAC260515C00021000
20 C	0.01	-80.00%	10	1,083	05-06	TAC260515C00020000
19 C	0.08	-68.00%	2	133	03-20	TAC260515C00019000
18 C	0.45	-55.45%	3	119	12-29	TAC260515C00018000
17 C	0.07	+40.00%	1	97	04-29	TAC260515C00017000
16 C	0.12	+140.00%	1	1,569	05-08	TAC260515C00016000
15 C	0.05	-28.57%	92	1,140	05-06	TAC260515C00015000
14 C	0.05	0.00%	11	980	05-08	TAC260515C00014000
13 C	0.21	-16.00%	21	1,571	05-08	TAC260515C00013000
12 C	0.78	0.00%	3	63	05-08	TAC260515C00012000
11 C	1.67	+4.37%	4	16	04-27	TAC260515C00011000
10 C	2.75	+3.77%	3	222	04-29	TAC260515C00010000
9 C	4.40	-48.54%	3	4	01-05	TAC260515C00009000
8 C	5.60	+5.66%	1	1	01-29	TAC260515C00008000
7 C	0	0%	0			TAC260515C00007000
6 C	0	0%	0			TAC260515C00006000
5 C	7.95	-11.67%	2	1	02-02	TAC260515C00005000
4 C	10.10	0%	2	1	01-28	TAC260515C00004000
3 C	9.88	-4.08%	1	1	05-06	TAC260515C00003000
2 C	10.88	+1.97%	5	40	05-06	TAC260515C00002000
1 C	11.85	+1.72%	10	44	05-06	TAC260515C00001000

Puts

Strike	Price	Change	Vol	OI	Last	Contract Name
35 P	0	0%	0			TAC260515P00035000
30 P	17.60	+1.73%	2	1	02-05	TAC260515P00030000
29 P	16.60	0%	4	1	02-05	TAC260515P00029000
28 P	15.75	+2.27%	2	1	02-05	TAC260515P00028000
27 P	14.60	+8.15%	6	6	02-05	TAC260515P00027000
26 P	13.75	+3.00%	2	1	02-05	TAC260515P00026000
25 P	12.30	+6.49%	8	3	02-04	TAC260515P00025000
24 P	11.75	0%	2	0	02-05	TAC260515P00024000
23 P	10.75	0%	2	1	02-05	TAC260515P00023000
22 P	8.60	0%	2	1	01-29	TAC260515P00022000
21 P	8.80	+15.79%	2	1	02-05	TAC260515P00021000
20 P	7.65	0%	6	1	02-05	TAC260515P00020000
19 P	6.45	-5.15%	1	2	04-27	TAC260515P00019000
18 P	5.80	+45.00%	1	17	04-24	TAC260515P00018000
17 P	4.46	-7.08%	1	24	04-28	TAC260515P00017000
16 P	3.23	+7.67%	1	5	04-17	TAC260515P00016000
15 P	2.47	-10.83%	3	171	04-27	TAC260515P00015000
14 P	1.84	+104.44%	1	4	04-20	TAC260515P00014000
13 P	0.53	-8.62%	1	75	05-07	TAC260515P00013000
12 P	0.09	-35.71%	17	470	05-07	TAC260515P00012000
11 P	0.08	+60.00%	1	259	05-07	TAC260515P00011000
10 P	0.36	0.00%	3	3	02-27	TAC260515P00010000
9 P	0.10	-72.97%	2	3	04-20	TAC260515P00009000
8 P	0.37	0%	1	0	04-21	TAC260515P00008000
7 P	0	0%	0			TAC260515P00007000
6 P	0	0%	0			TAC260515P00006000
5 P	0	0%	0			TAC260515P00005000
4 P	0	0%	0			TAC260515P00004000
3 P	0.04	0%	2	0	04-21	TAC260515P00003000
2 P	0	0%	0			TAC260515P00002000
1 P	0.20	0%	1	1	04-21	TAC260515P00001000

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