Sensex Companies with its Weightage

Sensex companies are selected very judiciously by experts. All companies are not included in Sensex. As on date, sensex has only 31 companies (earlier there were only 30*).

These 31 companies represent complete Indian stock market. The weightage each company that it has on Sensex, is an essential information for investors. Company having highest weightage in Sensex is often the most loved company of the market.

The process of inclusion of 31 heavyweight stocks in SENSEX is very clearly laid our by BSE. All heavyweight stocks representing SENSEX are their sector’s representative’s.

The stocks that gets included in SENSEX are fundamentally strong, well established, sector leaders.

These selected companies are reviewed regularly. Idea is to include those stocks/scripts whose performance can represent overall performance of their respective sectors. After August 2003, Index (S&P BSE SENSEX) calculation methodology was changed to free float methodology. Due to this change in Index calculation methodology, index weightage of many stocks saw dramatic change.

What is the between full market capitalization and free float capitalization method? Their main difference is in the ‘numbers of stocks’ that is considered for calculation of index.

In full market capitalization method stocks held by even promoters, government etc were included. But in free float method only those stocks which are available for public trading is used for index calculation.

So those companies which had large promoters holdings lost considerably in weightage. Only those stocks were included which was readily available for trading in the stock market. Stocks which were not included are as follows:

– Promoters held stocks
– Any one holding stocks who has interest to control company.
– Government of India held stocks
– Stocks held by agency through Foreign Holding Route.
– Anyone holding stocks with strategic focus
– Group companies held stocks
– Employee Welfare Trusts held stocks

BSE Sensex Weightage

How Companies are included in Sensex?

Sensex is calculated using free-float market cap concept of included companies. There are 30 companies included in sensex. When we say that sensex is 18,000, it means free-float market value these 30 companies is Rs 18,000 crore. What is the difference betweeen market capitalization and free-float market capitalization?

  • Market cap = Market Price x no. of shares issued by company.
  • Free-float market cap = Market cap x free float factor.

Another important information we must remember is base year for Sensex calculation is 1978-79. In year 1978-70 Sensex was assumed to be 100. It means from year 1979 till 2015, Sensex has appreciated from 100 to 27,000 level.

There is no partiality in selection of Sensex companies. All companies which are listed in Bombay Stock Exchange (BSE) can be included in Sensex. As on date more than 5,000 companies are listed in Sensex.

But there are few screening criterias. All 5,000 companies cannot be eligible for inclusion in Sensex. All 5,000 odd companies of BSE are categorized into 4 groups. The grouping are: A Group, B Group, T Group & Z Group.

The Z group of companies are those companies which has not complied with BSE regulations. Hence Z group companies cannot form a part of Sensex 30 companies.

IPO cannot be included in Sensex. To be eligible for Sensex, companies must be listed in BSE for minimum 3 months. Moreover, in all of these 3 months, the companies stock must have traded on every day.

To be included in Sensex, companies must report sales turnover (total income) of last 4 quarters. All companies which satisfies the above preconditions are listed in order of average three month float market capitalization. Only top 75 ranked companies are considered for further screening.

All 5,000 companies are again ranked based on their total market capitalization. But this total capitalization is considers as average of last 3 months trading. This way, again 75 stocks are ranked.

All companies ranked based on float-market cap and total market cap are included in one list. So this way we will have more than 75 selected companies. These >75 comoanies are ranked once again based on average 3 month of traded value. Companies whose cumulated value traded is >98% are excluded from the list. Balace companies are again ranked based on float-market capitalization. Companies which had calculated weight of less than 0.5% are again exluded.

Balance stocks are then categorized based on their sector of business. Based on float market capitalization, these stocks are ranked again. Top 31 stocks are included in Sensex.

There is one big advantage of tracking thirty one (31) stock with high weightage in Sensex. As these 31 stocks that are included in index calculation are established, fundamentally strong stocks. Hence we can afford to cut short our analysis of identifying quality stocks. As we have a ready list of stocks which even drives the SENSEX can be blindly tracked and bought if available at good price valuations.

Sensex Companies with its Weightage - Sector

Sensex Companies with its Weightage

(Updated on July’2017)

SL Company Name Industry Market Price (Rs.) Market Cap (Rs.Cr.) Weightage
1 Reliance Refineries 1,586.20 515,742.73 9.49%
2 TCS Computers - Software 2,490.90 476,829.90 8.77%
3 HDFC Bank Banks - Private Sector 1,703.35 438,422.41 8.06%
4 ITC Cigarettes 288.5 350,589.97 6.45%
5 HDFC Finance - Housing 1,641.60 261,490.43 4.81%
6 HUL Personal Care 1,158.55 250,763.75 4.61%
7 SBI Banks - Public Sector 290.35 231,510.70 4.26%
8 Maruti Suzuki Auto - Cars & Jeeps 7,527.60 227,393.79 4.18%
9 Infosys Computers - Software 979.9 225,077.61 4.14%
10 ONGC Oil Drilling And Exploration 164.55 211,170.88 3.88%
11 ICICI Bank Banks - Private Sector 301.2 193,154.44 3.55%
12 Kotak Mahindra * Banks - Private Sector 998.65 190,093.12 3.50%
13 Larsen Infrastructure - General 1,179.15 165,095.70 3.04%
14 Bharti Airtel Telecommunications - Service 411.15 164,353.11 3.02%
15 Coal India Mining & Minerals 262.25 162,789.31 2.99%
16 Tata Motors Auto - LCVs & HCVs 464.6 157,771.22 2.90%
17 Wipro Computers - Software 286.4 139,366.50 2.56%
18 Sun Pharma Pharmaceuticals 576.6 138,343.99 2.54%
19 NTPC Power - Generation & Distribution 164.35 135,852.99 2.50%
20 Axis Bank Banks - Private Sector 540.2 129,482.18 2.38%
21 Asian Paints Paints & Varnishes 1,155.85 110,868.88 2.04%
22 M&M Auto - Cars & Jeeps 1,383.05 85,906.05 1.58%
23 Bajaj Auto Auto - 2 & 3 Wheelers 2,815.00 81,456.82 1.50%
24 Adani Ports Infrastructure - General 381.35 78,975.75 1.45%
25 Hero Motocorp Auto - 2 & 3 Wheelers 3,679.65 73,481.45 1.35%
26 Tata Steel Steel - Large 552.6 53,669.39 0.99%
27 Lupin Pharmaceuticals 1,142.85 51,625.27 0.95%
28 Dr Reddys Labs Pharmaceuticals 2,759.75 45,757.25 0.84%
29 Cipla Pharmaceuticals 566.1 45,545.56 0.84%
30 BHEL Infrastructure - General 145.1 35,514.68 0.65%
31 Tata Motors (D) * Auto - LCVs & HCVs 274.6 8,811.32 0.16%

* You might have noticed that the list of companies in SENSEX is now 31 instead of 30. Yes, this is a very recent change brought into effect by BSE since May’2017. Since 22nd May’17, GAIL has been removed from 30 Sensex companies, and in its place two companies have been added. Hence the SENSEX composition has increased from 30 to 31. The new companies are, Kotak Mahindra Bank and Tata Motors (D).


The best is to invest in those stocks which has high weightage in SENSEX. These stocks can be considered as best blue chip stocks available in the country. In order to invest in such stocks better option is to invest in index funds. Index funds tracks BSE SENSEX. They invest only those stocks which are listed as Sensex scripts. If one does not want to go into the effort of identifying quality stocks, investing in index funds is the best option. Index funds will invest in the above listed 30 stocks. The proportion of above 30 stocks will be the same as they are distributed in the SENSEX.

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Disclaimer: All blog posts of are for information only. No blog posts should be considered as an investment advice or as a recommendation. The user must self-analyze all securities before investing in one.

About the Author

I am a Blogger with a passion for investment education. I started blogging in 2007-08. Blogging didn’t happened to me as a coincidence, it was a conscious decision. The idea with which I started blogging still stands true. In my starting days my finances remained tight. I was reading heavily about how to manage finance. One day I got hold of a book which my father gifted me in 2003. It was stacked below my graduation books. It was a small-thin book with its cover named "Rich Dad Poor Dad".....more

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