Indian companies are today in an enviable position. A majority of the biggest companies are from the oil & gas and banking sectors. Here's a look at India's 30 biggest companies, according to The Economic Times.

1. Indian Oil Corporation
Turnover: Rs 3,13, 628 crore (Rs 3.13.trillion)
Percentage change: 21.76%
PAT: Rs 7,831 crore (Rs 78.31 billion)
Total assets: Rs 1,17,406 crore (Rs 1.17 trillion)

2. Reliance Industries
Turnover: Rs 2,68,354 crore (Rs 2.68 trillion)
Percentage change: 30.32%
PAT: Rs 20,211 crore (Rs 202.11 billion)
Total assets: Rs 2,39,003 crore (Rs 2.39 trillion)

3. Bharat Petroleum Corporation
Turnover: Rs 1,55,370 crore (Rs 1.55 trillion)
Percentage change: 23.13%
PAT: Rs 1,635 crore (Rs 16.35 billion)
Total assets: Rs 41,534 crore (Rs 415.34 billion)
    
4. State Bank of India
Turnover: Rs 1,47,844 crore (Rs 1.47 trillion)
Percentage change: 10.45%
PAT: Rs 10,685 crore (Rs 106.85 billion)
Total assets: Rs 14,84,482 crore (Rs 14.8 trillion)

5. Hindustan Petroleum Corporation
Turnover: Rs 1,40,000 crore (Rs 1.4 trillion)
Percentage change: 23.56%
PAT: Rs 1,704 crore (Rs 1.7 billion)
Total assets: Rs 44,407.18 crore (Rs 444.07 trillion)

6. Oil and Natural Gas Corporation
Turnover: Rs 1,24,556 crore (Rs 1.24 trillion)
Percentage change: 16.34%
PAT: Rs 22,456 crore (Rs 224.56 billion)
Total assets: Rs 1,43,471 crore (Rs 1.43 trillion)

7. Tata Motors
Turnover: Rs 1,23,223 crore (Rs 1.23 trillion)
Percentage change: 30.42%
PAT: Rs 9,274 crore (Rs 92.74 billion)
Total assets: Rs 52,209 crore (Rs 522.09 billion)

8. Tata Steel
Turnover: Rs 1,19,734 crore (Rs 1.19 trillion)
Percentage change: 15.60%
PAT: Rs 8,983 crore (Rs 89.83 billion)
Total assets: Rs 97,155 crore (Rs 971.55 billion)

9. Hindalco Industries
Turnover: Rs 72,508.72 crore (Rs 725.08 billion)
Percentage change: 18.81%
PAT: Rs 2,456.37 crore (Rs 24.56 billion)
Total assets: Rs 58,932.64 crore (Rs 589.32 billion)

10. ICICI Bank
Turnover: Rs 61,594.70 crore (Rs 615.94 billion)
Percentage change: 3.35%
PAT: Rs 6,093.27 crore (Rs 60.93 billion)
Total assets: Rs 5,06,087.63 crore (Rs 5.06 trillion)

11. NTPC
Turnover: Rs 60,008.18 crore (Rs 600.08 billion)
Percentage change: 17.20%
PAT: Rs 9,353.40 crore (Rs 93.53 billion)
Total assets: Rs 1,19,683.40 crore (Rs 1.19 trillion)

12. Bharti Airtel
Turnover: Rs 59,601.80 crore (Rs 596.01 billion)
Percentage change: 42.19%
PAT: Rs 6,046.70 crore (Rs 60.46 billion)
Total assets: Rs 1,00,785.20 crore (Rs 1 trillion)

13. Coal India
Turnover: Rs 55,148.31 crore (Rs 551.48 billion)
Percentage change: 11.37%
PAT: Rs 10,867.35 crore (Rs 108.67 billion)
Total assets: Rs 34,903.38 crore (Rs 349.03 billion)

14. Larsen & Toubro
Turnover: Rs 53,008.27 crore (Rs 530.08 billion)
Percentage change: 18.51%
PAT: Rs 4,456.17 crore (Rs 44.56 billion)
Total assets: Rs 63,416.74 crore (Rs 634.16 billion)

15. Essar Oil
Turnover: Rs 48,165 crore (Rs 481.65 billion)
Percentage change: 28.34%
PAT: Rs 654 crore (Rs 6.54 billion)
Total assets: Rs 21,084.83 crore (Rs 210.84 billion)