
1) Law firm of Japan
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https://www.crosswordclues.com/clue/big-four
[British railway companies] The Big Four was a name used to describe the four largest railway companies in the United Kingdom in the period 1923-1947. The name was coined by the Railway Magazine in its issue of February 1923: `The Big Four of the New Railway Era`. The Big Four were: The companies were formed as a result of the Railways Act ...
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http://en.wikipedia.org/wiki/Big_Four_(British_railway_companies)
[Central Pacific Railroad] The Big Four was the name popularly given to the businessmen and philanthropists who built the Central Pacific Railroad, the western portion of the First Transcontinental Railroad in the United States. Composed of Leland Stanford, Collis Potter Huntington, Mark Hopkins, and Charles Crocker, the four preferred to b...
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http://en.wikipedia.org/wiki/Big_Four_(Central_Pacific_Railroad)
[Indian snakes] These are the four venomous snake species responsible for causing the most snake bite cases in South Asia (mostly in India). They are referred to as the big four. ==Snakes== The Big Four: File:Cobra.jpg|Naja naja, the spectacled cobra. File:Bungarus caerulus.jpg|Bungarus caeruleus, the common krait. File:Daboia_russelii_A_Ch...
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http://en.wikipedia.org/wiki/Big_Four_(Indian_snakes)
[Scotland Yard] The Big Four was a nickname given to the four Superintendents in charge of the Criminal Investigation Department at Scotland Yard, the headquarters of the Metropolitan Police, from about 1919 onwards. They were: ...
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http://en.wikipedia.org/wiki/Big_Four_(Scotland_Yard)
[White Star Line] The Big Four were a quartet of 20,000 ton ocean liners built by Harland & Wolff shipyard for the White Star Line in the early 20th century, completed in 1906: ==Origin== In 1899, White Star Line commissioned {RMS|Oceanic|1899|6}, which exceed the {SS|Great Eastern} in length, although not tonnage. After Thomas Ismay’s de...
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http://en.wikipedia.org/wiki/Big_Four_(White_Star_Line)
[audit firms] The Big Four are the four largest international professional services networks, offering audit, assurance, tax, consulting, advisory, actuarial, corporate finance, and legal services. They handle the vast majority of audits for publicly traded companies as well as many private companies, creating an oligopoly in auditing large...
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http://en.wikipedia.org/wiki/Big_Four_(audit_firms)
[banking] ==International Use== Internationally, when discussing global banking, the term `Big Four` is used to describe the world`s most influential central banks: ==Australia/New Zealand== In Australia, the `big four banks` refers to the four largest banks by market share, who between them hold 80% of the home loan markets in the country....
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http://en.wikipedia.org/wiki/Big_Four_(banking)
[book publishing] The Big Four are the four biggest English-language book publishing companies. Sometimes, the term is also used to refer to the Big Four academic publishers. ==Big Four book publishers== The four companies are: Each of these four companies share a common headquarters in New York City. ==Big Four academic publishers== ...
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http://en.wikipedia.org/wiki/Big_Four_(book_publishing)
[polo] The Big Four in polo was the American polo team that competed for the International Polo Cup. ==History== The term was first used in 1909 for the team of Devereaux Milburn, Harry Payne Whitney, Lawrence Waterbury, and James Montaudevert Waterbury, Jr.. The term was still in use for the 1927 team of James Watson Webb, Sr., Thomas Hitc...
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http://en.wikipedia.org/wiki/Big_Four_(polo)
[tennis] In tennis, the Big Four refers to the quartet of men`s singles players Roger Federer, Rafael Nadal, Novak Djokovic, and Andy Murray. These players were considered dominant in terms of ranking and tournament victories, including Grand Slam tournaments and ATP Masters 1000 events, as well as the ATP World Tour Finals and Olympic Game...
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http://en.wikipedia.org/wiki/Big_Four_(tennis)
[sport] Brightened and rotated edit of public domain :Image:Prodome.jpg. ...
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http://en.wikipedia.org/wiki/Big_four_(sport)

In the UK, a name for the four largest clearing banks: Barclays, HSBC, Lloyds TSB and Royal Bank of Scotland (which owns NatWest). In Japan a term for the largest securities houses: Daiwa, Nikko, Nomura and Yamaichi
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http://www.aviva.com/glossary/

The 4-6-7-10 split. (big ears, double pinochle, golden gate)
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http://www.bowlersparadise.com/help/glossary.shtml

In the UK the four large clearing banks: Lloyds TSB, Barclays, HSBC and Royal Bank of... <a target=_blank href='http://www.finance-glossary.com/terms/Big-Four.htm?id=1673&ginPtrCode=00000&PopupMode=false' title='Read full definition of Big Four'>more</a>
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http://www.finance-glossary.com/pages/home.htm

In business, Big Four is the name given to the four largest UK commercial banks, i.e. Barclays, Lloyds (now Lloyds-TSB), Midland (now HSBC), and National Westminster.
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http://www.probertencyclopaedia.com/browse/JB.HTM
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