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TAC
TransAlta Corporation
stock NYSE

At Close

Sep 25, 2026 3:59:55 PM EDT

11.53USD-2.039%(-0.24)703,331

11.52Bid 11.54Ask 0.02Spread

Pre-market

0.00USD-100.000%(-11.77)0

After-hours

Sep 25, 2026 4:10:30 PM EDT

11.53USD0.000%(0.00)1

OverviewOption ChainHistoricalExchangesShortsMore

Expiration Dates

Oct 16, 2026 Nov 20, 2026 Dec 18, 2026 Mar 19, 2027

ITM/OTM for Dec 18, 2026View All Dates

Calls ITM	Calls OTM	Puts ITM	Puts OTM
141	6,948	2,083	59

TAC Dec 18, 2026 Exp. - Volume by Strike

Puts

Calls

TAC Dec 18, 2026 Exp. - Open Interest by Strike

Puts

Calls

TAC Dec 18, 2026 Exp. - Max Pain @ $12.00

Puts

Calls

TAC Dec 18, 2026 Exp. - Option Chain

In the Money (ITM)

Calls

Strike	Price	Change	Vol	OI	Last	Contract Name
25 C	0.22	0%	4	4	06-08	TAC261218C00025000
22 C	0.37	-7.50%	1	21	06-05	TAC261218C00022000
21 C	0.05	-88.10%	20	21	09-21	TAC261218C00021000
20 C	0.54	-16.92%	50	190	06-22	TAC261218C00020000
19 C	0.47	0%	3	3	05-06	TAC261218C00019000
18 C	0.65	-30.11%	4	28	07-16	TAC261218C00018000
17 C	0.05	-94.32%	5	129	09-03	TAC261218C00017000
16 C	0.50	+42.86%	2	288	09-18	TAC261218C00016000
15 C	0.30	-14.29%	2,001	5,467	09-16	TAC261218C00015000
14 C	0.25	-44.44%	1	399	09-24	TAC261218C00014000
13 C	0.70	-6.67%	3	325	09-22	TAC261218C00013000
12 C	1.05	+22.09%	1	73	09-23	TAC261218C00012000
11 C	1.85	+5.71%	3	8	09-15	TAC261218C00011000
10 C	2.50	-9.09%	1	11	09-10	TAC261218C00010000
9 C	4.30	-14.00%	10	10	07-20	TAC261218C00009000
8 C	4.90	-22.22%	10	10	08-14	TAC261218C00008000
7 C	6.00	+10.09%	5	7	05-11	TAC261218C00007000
6 C	6.50	-2.99%	60	42	06-10	TAC261218C00006000
5 C	7.20	-21.23%	1	53	09-11	TAC261218C00005000

Puts

Strike	Price	Change	Vol	OI	Last	Contract Name
25 P	12.50	0.00%	1	1	05-07	TAC261218P00025000
22 P	8.08	0%	2	1	06-01	TAC261218P00022000
21 P	0	0%	0			TAC261218P00021000
20 P	0	0%	0			TAC261218P00020000
19 P	6.70	0%	1	1	05-06	TAC261218P00019000
18 P	0	0%	0			TAC261218P00018000
17 P	0	0%	0			TAC261218P00017000
16 P	0	0%	0			TAC261218P00016000
15 P	0	0%	0			TAC261218P00015000
14 P	0	0%	0			TAC261218P00014000
13 P	1.70	+6.92%	2	40	09-14	TAC261218P00013000
12 P	0.92	+2.22%	1	2,040	09-22	TAC261218P00012000
11 P	0.60	+1.69%	1	5	09-15	TAC261218P00011000
10 P	0.35	+16.67%	2	54	09-15	TAC261218P00010000
9 P	0	0%	0			TAC261218P00009000
8 P	0	0%	0			TAC261218P00008000
7 P	0	0%	0			TAC261218P00007000
6 P	0	0%	0			TAC261218P00006000
5 P	0	0%	0			TAC261218P00005000

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