1955 Companies
131 3M 230.9
320 Abbott Laboratories 88.1
273 Abex 109.9
124 ACF Industries 245.1
143 Admiral 219.6
152 Aeroquip-Vickers 212.3
170 Alco Products 187.2
35 Alcoa 708.3
184 Allegheny International 169.6
278 Allied Mills 106.7
54 Allis-Chalmers 492.9
218 Altria Group 142.8
400 AM International 65.4
52 AMAX 509.5
331 Amerada Hess 85.0
391 American Agricultural Chemical 67.2
230 American Bakeries 134.8
363 American Bosch Arma 74.4
40 American Can 652.4
373 American Chain & Cable 72.2
78 American Cyanamid 397.6
430 American Enka 59.7
437 American Forest Products 58.2
76 American Motors 400.3
390 American Optical 67.3
100 American Standard 303.4
145 American Viscose 217.2
407 American Zinc, Lead & Smelting 64.5
257 American-Marietta 120.7
242 AMF 126.5
11 Amoco 1,667.4
96 Amstar 308.8
319 Amsted Industries 89.0
62 Anaconda 461.1
275 Anaconda Wire & Cable 108.7
286 Anchor Hocking 103.7
457 Anderson-Prichard Oil 54.7
148 Anheuser-Busch 215.9
155 Archer Daniels Midland 207.7
163 Arden Farms 195.1
50 ARMCO 530.8
7 Armour 2,056.1
144 Armstrong Holdings 217.6
453 Armstrong Rubber 55.4
474 Arvin Industries 53.4
60 Asarco 466.8
134 Ashland 227.9
15 AT&T Technologies 1,526.2
47 Atlantic Richfield 596.2
440 Atlas Powder 57.6
83 Avco 375.4
455 Avon Products 55.1
120 A.O. Smith 249.6
Since 1955, when the first FORTUNE 500 was created, more than 1,800 companies have appeared on the list. Many of these companies have changed names over this period, owing to mergers, acquisitions, and bankruptcies. Other companies have gone private, or simply changed their names.

Companies are listed by the name with which they were associated in 2005, or at the time of their most recent list appearance before that. FORTUNE 500 companies that have been acquired by other FORTUNE 500 companies are listed under the name of the acquiring company. Rankings have been revised to reflect corrections in data.
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