Sorry, available market cap data for Procter & Gamble (PG) starts on July 1, 1985. Procter & Gamble (PG) has a market capitalization of $337.4B, based on 2.32B shares at a price of $145.27 (up 1.1% yesterday).

DATE	OPEN	HIGH	LOW	CLOSE	VOLUME
December 31 1980	$0.60	$0.61	$0.60	$0.60	2,966,400
December 30 1980	$0.60	$0.60	$0.60	$0.60	2,342,400
December 29 1980	$0.59	$0.60	$0.59	$0.60	2,256,000
December 26 1980	$0.59	$0.59	$0.59	$0.59	918,400
December 24 1980	$0.58	$0.59	$0.58	$0.59	4,697,600
December 23 1980	$0.58	$0.58	$0.58	$0.58	4,323,200
December 22 1980	$0.56	$0.58	$0.56	$0.57	4,457,600
December 19 1980	$0.56	$0.56	$0.55	$0.56	4,608,000
December 18 1980	$0.56	$0.56	$0.56	$0.56	4,336,000
December 17 1980	$0.56	$0.56	$0.56	$0.56	1,104,000
December 16 1980	$0.56	$0.56	$0.56	$0.56	1,580,800
December 15 1980	$0.57	$0.57	$0.56	$0.57	1,788,800
December 12 1980	$0.57	$0.57	$0.56	$0.57	2,739,200
December 11 1980	$0.57	$0.57	$0.56	$0.57	1,980,800
December 10 1980	$0.59	$0.59	$0.58	$0.58	2,115,200
December 09 1980	$0.59	$0.59	$0.59	$0.59	1,721,600
December 08 1980	$0.59	$0.59	$0.59	$0.59	2,009,600
December 05 1980	$0.60	$0.60	$0.59	$0.59	3,376,000
December 04 1980	$0.60	$0.60	$0.60	$0.60	2,073,600
December 03 1980	$0.60	$0.60	$0.60	$0.60	4,246,400
December 02 1980	$0.61	$0.61	$0.60	$0.61	1,670,400
December 01 1980	$0.62	$0.62	$0.61	$0.61	2,572,800
November 28 1980	$0.62	$0.62	$0.62	$0.62	844,800
November 26 1980	$0.62	$0.63	$0.62	$0.62	2,275,200
November 25 1980	$0.63	$0.63	$0.62	$0.62	1,689,600