Sorry, available market cap data for BP PLC ADR (BP) starts on July 1, 1985. BP PLC ADR (BP) has a market capitalization of $120.9B, based on 2.58B shares at a price of $46.94 (up 2.1% yesterday).

DATE	OPEN	HIGH	LOW	CLOSE	VOLUME
December 31 1980	$2.03	$2.03	$1.97	$1.99	513,600
December 30 1980	$2.02	$2.06	$2.01	$2.03	436,000
December 29 1980	$2.06	$2.08	$2.01	$2.02	342,400
December 26 1980	$2.07	$2.08	$2.06	$2.06	81,600
December 24 1980	$2.07	$2.09	$2.05	$2.07	258,800
December 23 1980	$2.13	$2.14	$2.06	$2.07	474,800
December 22 1980	$2.17	$2.19	$2.09	$2.13	366,400
December 19 1980	$2.19	$2.20	$2.15	$2.17	423,200
December 18 1980	$2.15	$2.23	$2.15	$2.19	1,474,400
December 17 1980	$2.06	$2.13	$2.06	$2.11	828,000
December 16 1980	$2.05	$2.06	$2.02	$2.04	639,200
December 15 1980	$2.04	$2.09	$2.04	$2.05	403,200
December 12 1980	$2.02	$2.06	$2.01	$2.04	362,800
December 11 1980	$2.03	$2.03	$1.94	$2.02	953,200
December 10 1980	$2.11	$2.14	$2.04	$2.06	449,600
December 09 1980	$2.11	$2.15	$2.08	$2.11	1,234,800
December 08 1980	$2.15	$2.15	$2.08	$2.11	669,600
December 05 1980	$2.21	$2.21	$2.08	$2.16	1,698,400
December 04 1980	$2.34	$2.36	$2.26	$2.26	396,000
December 03 1980	$2.36	$2.38	$2.33	$2.34	392,800
December 02 1980	$2.39	$2.39	$2.29	$2.36	1,006,800
December 01 1980	$2.47	$2.49	$2.39	$2.41	616,800
November 28 1980	$2.43	$2.49	$2.43	$2.47	546,000
November 26 1980	$2.41	$2.49	$2.39	$2.42	857,600
November 25 1980	$2.43	$2.45	$2.37	$2.41	744,800