Question: Which company serves more people, ICICI Bank or First Union?

Context paragraphs:
G. Kennedy Thompson: G. Kennedy "Ken" Thompson (born November 25, 1950) is an American businessman who was previously chairman, president, and CEO of Wachovia Corporation, formerly First Union Corporation, from 2000 through 2008.  First Union Corporation acquired Wachovia Corporation and changed its name to Wachovia in September 2001 after fending off a hostile takeover attempt by SunTrust Bank.  Thompson succeeded Edward E. Crutchfield in 2000, who stepped down due to health reasons.  Previous positions at First Union included vice chairman of the corporation and head of Global Capital Markets; president, First Union-Florida; senior vice president and head of First Union Human Resources; president, First Union Georgia.

Lalita D. Gupte: Lalita D. Gupte, Joint Managing Director of ICICI Bank (India’s second largest commercial bank), until 31 October 2006, is an important figure in India’s banking and financial services sector.  An INSEAD alumnus, Gupte was listed by the Fortune "as one of the fifty most powerful women in international business."  She is currently the Chairperson on the Board of ICICI Venture and a board member of Nokia Corporation. On 22 June 2010 she was appointed as member of Alstom’s Board of directors.

Bank of Madura: Bank of Madurai was established in 1943 by Karumuttu Thiagarajan Chettiar.  It acquired Chettinad Mercantile Bank (est. 1933) and Illanji Bank (est. 1904) in the 1960s.  Bank of Madura was a Chettiar bank with a large customer base of 2 million plus customers and a network of more than 280 branches and 40+ ATMs centres spread across about 100 cities in India.  The bank merged with ICICI Bank Limited, under Section 44A of the Banking Regulation Act, 1949.  The Reserve Bank of India approved the merger effective 10 March 2001.  It was headquartered at Madurai.

K. V. Kamath: Kundapur Vaman Kamath (Kannada: ಕುಂದಾಪುರ ವಾಮನ ಕಾಮತ್), commonly referred to as K. V. Kamath, is the chief of the New Development Bank of BRICS countries, he has served as the Chairman of Infosys Limited, the second-largest Indian IT services company, and as the Non-Executive Chairman of ICICI Bank, India's largest private bank.  Kamath also served as ICICI Bank's Managing Director and CEO from 1 May 1996 until his retirement from executive responsibilities on 30 April 2009.

Eko India Financial Services: Eko India Financial Services Pvt. Ltd. is an Indian fintech company, service for State Bank of India (SBI), ICICI Bank India's two largest banks and Yes Bank, India's youngest private bank, and provides no-frills bank accounts and deposit, withdrawal and remittance services to customers (nearly 80% of whom are migrants or the unbanked section of the population) through mobile banking.  With Bharti AXA Life Insurance Company, it provides Bharti AXA Life - Bachat Bima, micro-insurance policies.

ICICI Manipal Academy of Banking and Insurance: ICICI Manipal Academy of Banking and Insurance is a joint venture between the ICICI Bank and Manipal University.

ICICI Bank Canada: ICICI Bank Canada is a wholly owned subsidiary of ICICI Bank Limited, India’s largest private sector bank.  ICICI Bank Canada’s corporate office is located in Toronto, Ontario.  Established in December 2003, ICICI Bank Canada is a full-service direct bank with an asset base of about $6.5 billion as at December 31, 2016.  It is governed by Canada’s Bank Act and operates under the supervision of the Office of the Superintendent of Financial Institutions.  The bank has eight branches in Canada: one in Calgary, Alberta; one in Surrey, British Columbia; and six in the Greater Toronto Area, Ontario.

Kalpana Morparia: Kalpana Morparia is an Indian banker.  She was associated with ICICI Bank for thirty three years.  Presently she is the Chief Executive Officer of JP Morgan India, the Indian extension of a 2.1 trillion dollar American company.  Kalpana serves as an independent Director on the Boards of several leading Indian companies.  A graduate in law from Bombay University, Morparia has served on several committees constituted by the Government of India.  She is ranked by Fortune magazine as one of the fifty most powerful women in international business.

First Union: First Union Corporation was a bank holding company that provided commercial and retail banking services in eleven states in the eastern U.S.  First Union also provided various other financial services, including mortgage banking, credit card, investment banking (First Union Securities), investment advisory, home equity lending, asset-based lending, leasing, insurance, international and securities brokerage services and private equity (First Union Capital Partners), through other subsidiaries.

ICICI Bank: ICICI Bank, stands for Industrial Credit and Investment Corporation of India, is an Indian multinational banking and financial services company headquartered in Mumbai, Maharashtra, India, with its registered office in Vadodara.  In 2014, it was the second largest bank in India in terms of assets and third in term of market capitalisation.  It offers a wide range of banking products and financial services for corporate and retail customers through a variety of delivery channels and specialised subsidiaries in the areas of investment banking, life, non-life insurance, venture capital and asset management.  The bank has a network of 4,850 branches and 14,404 ATMs in India, and has a presence in 19 countries including India.

Supporting paragraphs: ICICI Bank First Union
Answer: ICICI Bank