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Common Shares (Tables)

12 Months Ended

Dec. 31, 2019

TransAlta is authorized to issue an unlimited number of voting common shares without nominal or par value.


As at Dec. 31	2019			2018
	Common shares (millions)	Amount	Common shares (millions)	Amount
Issued and outstanding, beginning of year	284.6	3,059	287.9	3,094
Purchased and cancelled under the NCIB	(7.7)	(83)	(3.3)	(35)
Stock options exercised	0.1	2	—	—
Issued and outstanding, end of year	277.0	2,978	284.6	3,059

The following are the effects of the Corporation's purchase and cancellation of the common shares during the year:


For the year ended Dec. 31	2019		2018
Total shares purchased⁽¹⁾	7,716,300		3,264,500
Average purchase price per share	$	8.80	$	7.02
Total cost	68		23
Weighted average book value of shares cancelled	83		35
Amount recorded in deficit	15		12

All preferred shares issued and outstanding are non-voting cumulative redeemable fixed rate first preferred shares.


As at Dec. 31	2019			2018
Series	Number of shares (millions)	Amount	Number of shares (millions)	Amount
Series A	10.2	248	10.2	248
Series B	1.8	45	1.8	45
Series C	11.0	269	11.0	269
Series E	9.0	219	9.0	219
Series G	6.6	161	6.6	161
Issued and outstanding, end of year	38.6	942	38.6	942


Year ended Dec. 31	2019	2018	2017
Net earnings (loss) attributable to common shareholders	52	(248)	(190)
Basic and diluted weighted average number of common shares outstanding (millions)	283	287	288
Net earnings (loss) per share attributable to common shareholders, basic and diluted	0.18	(0.86)	(0.66)