Sorry, available market cap data for Walmart (WMT) starts on October 1, 1985. Walmart (WMT) has a market capitalization of $753.4B, based on 8.02B shares at a price of $93.98 (down 1% today).

DATE	OPEN	HIGH	LOW	CLOSE	VOLUME
December 31 1981	$0.06	$0.06	$0.06	$0.06	2,534,400
December 30 1981	$0.06	$0.07	$0.06	$0.07	4,723,200
December 29 1981	$0.06	$0.06	$0.06	$0.06	1,804,800
December 28 1981	$0.06	$0.07	$0.06	$0.06	2,304,000
December 24 1981	$0.06	$0.06	$0.06	$0.06	998,400
December 23 1981	$0.06	$0.06	$0.06	$0.06	1,766,400
December 22 1981	$0.06	$0.06	$0.06	$0.06	4,339,200
December 21 1981	$0.06	$0.06	$0.06	$0.06	3,264,000
December 18 1981	$0.06	$0.06	$0.06	$0.06	3,571,200
December 17 1981	$0.06	$0.06	$0.06	$0.06	768,000
December 16 1981	$0.06	$0.06	$0.06	$0.06	7,257,600
December 15 1981	$0.06	$0.06	$0.06	$0.06	2,918,400
December 14 1981	$0.07	$0.07	$0.06	$0.06	8,793,600
December 11 1981	$0.06	$0.07	$0.06	$0.07	4,185,600
December 10 1981	$0.06	$0.06	$0.06	$0.06	6,412,800
December 09 1981	$0.06	$0.06	$0.06	$0.06	1,228,800
December 08 1981	$0.06	$0.06	$0.06	$0.06	24,422,400
December 07 1981	$0.06	$0.06	$0.06	$0.06	1,344,000
December 04 1981	$0.07	$0.07	$0.06	$0.06	4,492,800
December 03 1981	$0.07	$0.07	$0.07	$0.07	9,177,600
December 02 1981	$0.07	$0.07	$0.07	$0.07	5,798,400
December 01 1981	$0.07	$0.07	$0.07	$0.07	13,977,600
November 30 1981	$0.07	$0.07	$0.07	$0.07	5,683,200
November 27 1981	$0.07	$0.07	$0.06	$0.07	2,073,600
November 25 1981	$0.06	$0.07	$0.06	$0.07	2,688,000