Sorry, available market cap data for Texas Instruments (TXN) starts on July 1, 1985. Texas Instruments (TXN) has a market capitalization of $257.4B, based on 913.25M shares at a price of $281.88 (up 0.4% today).

DATE	OPEN	HIGH	LOW	CLOSE	VOLUME
July 31 1984	$1.20	$1.21	$1.19	$1.20	7,497,600
July 30 1984	$1.24	$1.24	$1.19	$1.20	7,876,800
July 27 1984	$1.19	$1.24	$1.19	$1.23	8,520,000
July 26 1984	$1.19	$1.21	$1.18	$1.19	7,992,000
July 25 1984	$1.17	$1.17	$1.13	$1.17	9,460,800
July 24 1984	$1.19	$1.19	$1.17	$1.17	5,150,400
July 23 1984	$1.19	$1.19	$1.18	$1.19	4,334,400
July 20 1984	$1.21	$1.21	$1.19	$1.20	3,700,800
July 19 1984	$1.20	$1.21	$1.20	$1.21	3,456,000
July 18 1984	$1.20	$1.21	$1.20	$1.21	4,766,400
July 17 1984	$1.19	$1.20	$1.19	$1.19	4,372,800
July 16 1984	$1.20	$1.20	$1.18	$1.20	4,142,400
July 13 1984	$1.21	$1.21	$1.19	$1.20	4,507,200
July 12 1984	$1.24	$1.24	$1.19	$1.21	13,339,200
July 11 1984	$1.25	$1.25	$1.24	$1.24	5,208,000
July 10 1984	$1.27	$1.27	$1.25	$1.25	5,164,800
July 09 1984	$1.28	$1.28	$1.25	$1.27	4,555,200
July 06 1984	$1.28	$1.28	$1.26	$1.27	6,436,800
July 05 1984	$1.30	$1.30	$1.28	$1.28	2,097,600
July 03 1984	$1.31	$1.32	$1.29	$1.30	3,782,400
July 02 1984	$1.30	$1.31	$1.30	$1.31	2,572,800