Turkish Oil Refineries Corporation (Tupras) ranked the first in terms of net sales among the top 500 industrial enterprises of Turkey in 2010.

Istanbul Chamber of Industry, ISO, made public the results of its report on the top 500 industrial enterprises of Turkey. According to the report, TUPRAS again came the first as it happened since 2005.

Turkey's Electricity Generation Corp. (EUAS) ranked the second and Ford Automotive the third according to the report.

Following is the top 100 companies on ISO list:

2010 2009 Company Production-based sales (net-TL)
1 1 TUPRAS-Turkiye Petrol Rafinerileri A.S. 20,819,067,010
2 2 EUAS Elektrik Uretim A.S. Genel Mudurlugu 9,740,496,745
3 6 Ford Otomotiv Sanayi A.S. 6,004,819,331
4 3 Oyak-Renault Otomobil Fabrikalari A.S. 5,871,042,516
5 5 TOFAS Turk Otomobil Fabrikasi A.S. 5,448,847,625
6 4 Arcelik A.S. 5,108,831,17
7 8 Aygaz A.S. 3,969,130,023
8 7 Eregli Demir ve Celik Fabrikalari T,A.S. 3,715,823,817
9 11 Icdas Celik Enerji Tersane ve Ulasim San. A.S. 3,523,477,229
10 12 Iskenderun Demir ve Celik A.S. 3,239,662,761
11 10 Habas Sinai ve Tibbi Gazlar Istihsal Endustrisi A.S. 2,827,821,839
12 14 PETKIM Petrokimya Holding A.S. 2,789,524,479
13 9 Vestel Elektronik San. ve Tic. A.S. 2,422,174,090
14 13 Toyota Otomotiv Sanayi Turkiye A.S. 2,326,270,180
15 22 Mercedes-Benz Turk A.S. 2,221,362,664
16 16 Unilever San. ve Tic. Turk A.S. 2,099,831,304
17 15 Turkiye Seker Fabrikalari A.S. 2,072,503,647
18 18 Turkiye Komur Isletmeleri Kurumu 2,007,646,209
19 20 Colakoglu Metalurji A.S. 1,947,112,529
20 17 BSH Ev Aletleri San. ve Tic. A.S. 1,929,869,218
21 19 Ipragaz A.S. 1,875,676,204
22 26 Milangaz LPG Dagitim Tic. ve San. A.S. 1,854,035,796
23 28 Borcelik Celik San. Tic. A.S. 1,619,274,756
24 38 Er-Bakir Elektrolitik Bakir Mamulleri A.S. 1,529,585,000
25 23 Kroman Celik Sanayii A.S. 1,525,203,328
26 29 Sarkuysan Elektrolitik Bakir San. ve Tic. A.S. 1,472,838,227
27 24 Goldas Kuyumculuk Sanayi Ithalat Ihracat A.S. 1,460,119,660
28 45 Toscelik Profil ve Sac Endustrisi A.S. 1,454,653,589
29 25 Coca-Cola Icecek A.S. 1,441,793,814
30 30 Turkiye Petrolleri Anonim Ortakligi 1,371,303,217
31 33 AKSA Akrilik Kimya San. A.S. 1,309,712,086
32 21 PHILSA Philip Morris Sabanci Sigara ve Tutunculuk San. ve Tic. A.S. 1,302,087,088
33 27 Vestel Beyaz Esya San. ve Tic. A.S. 1,220,609,175
34 36 Konya Seker San. ve Tic. A.S. 1,187,080,538
35 35 Diler Demir Celik Endustri ve Tic. A.S. 1,186,669,326
36 32 Cay Isletmeleri Genel Mudurlugu 1,173,076,150
37 43 Hyundai Assan Otomotiv San. ve Tic. A.S. 1,150,155,807
38 41 Kaptan Demir Celik Endustrisi ve Ticaret A.S. 1,143,498,903
39 31 Ak Gida San. ve Tic. A.S. 1,083,780,342
40 37 Bosch San. ve Tic. A.S. 1,023,734,995
41 84 Turk Traktor ve Ziraat Makineleri A.S. 1,021,679,933
42 46 KARDEMIR Karabuk Demir Celik San. ve Tic. A.S. 1,000,839,174
43 56 Eti Maden Isletmeleri Genel Mudurlugu 981,594,635
44 57 Yildiz Entegre Agac San. ve Tic. A.S. 981,584,172
45 40 Aselsan Elektronik San. ve Tic. A.S. 978,949,024
46 44 BANVIT Bandirma Vitaminli Yem San. A.S. 971,999,526
47 48 Borusan Mannesmann Boru San. ve Tic. A.S. 956,676,052
48 49 BRISA Bridgestone Sabanci Lastik San. ve Tic. A.S. 924,699,665
49 47 Kastamonu Entegre Agac San. ve Tic. A.S. 914,983,394
50 51 Izmir Demir Celik Sanayi A.S. 910,297,942
51 34 Anadolu Efes Biracilik ve Malt San. A.S. 909,831,432
52 59 Yazici Demir Celik Sanayi ve Turizm Ticaret A.S. 898,645,350
53 54 Toros Tarim San. ve Tic. A,S 892,277,815
54 63 Assan Aluminyum San. ve Tic. A.S. 885,466,973
55 82 TUSAS- Turk Havacilik ve Uzay San. A.S. 851,812,139
56 67 Yucel Boru ve Profil Endustrisi A.S. 843,048,327
57 53 Firat Plastik Kaucuk San. ve Tic. A.S. 828,306,331
58 75 Nursan Metalurji Endustrisi A.S. 819,763,469
59 66 SUTAS Sut Urunleri A.S. 806,449,991
60 55 Akcansa Cimento San. ve Tic. A.S. 799,888,727
61 52 Siemens San. ve Tic. A.S. 798,211,995
62 61 Turk Pirelli Lastikleri A.S. 796,888,287
63 76 Mogaz Petrol Gazlari A.S. 772,701,510
64 64 Sanko Tekstil Isletmeleri San. ve Tic. A.S. 772,179,259
65 73 Hayat Kimya Sanayi A.S. 771,569,879
66 62 C,P, Standart Gida San. ve Tic. A.S. 737,878,076
67 39 Areva T&D Enerji Endustrisi A.S. 735,400,719
68 81 Delphi Automotive Systems Ltd. Sti. 731,720,691
69 83 HES Hacilar Elektrik San. ve Tic. A.S. 710,646,967
70 80 Abalioglu Yem Soya ve Tekstil San. A.S. 703,711,995
71 69 Tat Konserve San. A.S. 685,833,478
72 68 Soma Elektrik Uretim ve Ticaret A.S. 684,495,337
73 60 Oltan Gida Mad, Ihr. Ith. ve Tic. Ltd. Sti. 681,704,007
74 86 Eti Gida San. ve Tic. A.S. 681,026,270
75 74 CIMSA Cimento San. ve Tic. A.S. 673,599,079
76 65 S.S. Trakya Yagli Tohumlar Tarim Satis Kooperatifleri Birligi 658,595,170
77 136 Advansa Sasa Polyester Sanayi A.S. 645,705,323
78 88 BMC San. ve Tic. A.S. 644,975,536
79 50 Ulker Cikolata Sanayi A.S. 642,810,718
80 - - -
81 91 Trakya Cam San. A.S. 606,131,246
82 78 Boytas Mobilya San. ve Tic. A.S. 600,200,224
83 92 Erpilic Entegre Tavukculuk Uretim Pazarlama ve Tic. Ltd. Sti. 596,811,202
84 116 Noksel Celik Boru Sanayi A.S. 596,179,626
85 77 Ekinciler Demir ve Celik San. A.S. 595,734,172
86 72 JTI Tutun Urunleri Sanayi A.S. 590,434,738
87 99 Korteks Mensucat San. ve Tic. A.S. 590,073,815
88 93 Keskinoglu Tavukculuk ve Damizlik Isletmeleri San. Tic. A.S. 588,201,443
89 - Vestel Dijital Uretim San. A.S. 575,911,460
90 87 Makina ve Kimya Endustrisi Kurumu Genel Mudurlugu 575,608,556
91 100 Honda Turkiye A.S. 572,774,517
92 - Besler Gida ve Kimya San. ve Tic. A.S. 566,015,577
93 105 Pinar Sut Mamulleri Sanayi A.S. 563,201,448
94 95 BEYPI Beypazari Tarimsal Uretim Pazarlama San. ve Tic. A.S. 553,337,283
95 58 Kayseri Seker Fabrikasi A.S. 550,884,307
96 70 Nursan Celik Sanayi ve Haddecilik A.S. 545,707,106
97 128 Ege Celik Endustrisi San. ve Tic. A.S. 542,078,831
98 124 Park Teknik Elektrik Madencilik Turizm San. ve Tic. A.S. 540,749,683
99 - Senpilic Gida Sanayi A.S. 539,730,161
100 103 Sider Dis Ticaret A.S. 537,642,486