Common Stock

The following represents the Company's purchase of Charter Class A common stock and the effect on the consolidated statements of cash flows during the three and six months ended June 30, 2018 and 2017.



	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
	Shares	$		Shares	$		Shares	$		Shares	$
Share buybacks	5,710,247	$	1,657	9,953,269	$	3,299	7,303,293	$	2,213	12,418,839	$	4,098
Income tax withholding	23,645	7		87,828	29		196,691	68		391,865	125
Exercise cost	1,752			1,391			6,415			40,545
	5,735,644	$	1,664	10,042,488	$	3,328	7,506,399	$	2,281	12,851,249	$	4,223

As of June 30, 2018, Charter had remaining board authority to purchase an additional $786 million of Charter’s Class A common stock and/or Charter Holdings common units. The Company also withholds shares of its Class A common stock in payment of income tax withholding owed by employees upon vesting of equity awards as well as exercise costs owed by employees upon exercise of stock options.

In 2017, Charter’s board of directors approved the retirement of the then currently held treasury stock and those shares were retired as of December 31, 2017. The Company accounts for treasury stock using the cost method and includes treasury stock as a component of total shareholders’ equity.