Sorry, available market cap data for Abbott Laboratories (ABT) starts on July 1, 1985. Abbott Laboratories (ABT) has a market capitalization of $193.3B, based on 1.74B shares at a price of $111.08 (up 0.7% yesterday).

DATE	OPEN	HIGH	LOW	CLOSE	VOLUME
December 31 1980	$0.27	$0.28	$0.27	$0.28	2,616,168
December 30 1980	$0.27	$0.27	$0.27	$0.27	2,402,312
December 29 1980	$0.27	$0.28	$0.27	$0.27	1,917,573
December 26 1980	$0.27	$0.27	$0.27	$0.27	377,812
December 24 1980	$0.27	$0.27	$0.27	$0.27	1,311,648
December 23 1980	$0.26	$0.27	$0.26	$0.27	3,300,506
December 22 1980	$0.25	$0.26	$0.25	$0.26	5,374,906
December 19 1980	$0.25	$0.25	$0.25	$0.25	1,746,488
December 18 1980	$0.25	$0.25	$0.25	$0.25	4,391,170
December 17 1980	$0.25	$0.25	$0.25	$0.25	3,649,803
December 16 1980	$0.25	$0.26	$0.25	$0.25	2,559,140
December 15 1980	$0.25	$0.25	$0.25	$0.25	1,917,573
December 12 1980	$0.24	$0.25	$0.24	$0.25	7,762,961
December 11 1980	$0.25	$0.25	$0.24	$0.24	5,011,351
December 10 1980	$0.26	$0.26	$0.25	$0.25	4,633,540
December 09 1980	$0.26	$0.26	$0.25	$0.26	2,708,839
December 08 1980	$0.26	$0.26	$0.26	$0.26	4,512,355
December 05 1980	$0.27	$0.27	$0.26	$0.26	2,851,409
December 04 1980	$0.26	$0.27	$0.26	$0.27	2,666,067
December 03 1980	$0.26	$0.26	$0.26	$0.26	1,247,491
December 02 1980	$0.26	$0.26	$0.26	$0.26	1,981,729
December 01 1980	$0.27	$0.27	$0.26	$0.26	2,131,428
November 28 1980	$0.27	$0.27	$0.27	$0.27	1,347,291
November 26 1980	$0.27	$0.27	$0.27	$0.27	3,492,976
November 25 1980	$0.25	$0.27	$0.25	$0.27	6,151,915