Question: Arena District was developed by a partnership containing which financial services company?

Context paragraphs:
Amscot Financial: Amscot Financial Inc. is an American financial services company headquartered in Tampa, Florida.  Founded in 1989 by Ian MacKechnie, Amscot Financial provides non-bank consumer financial services through a network of retail branches located exclusively within Florida.  Amscot's core services include check cashing, bill payment, prepaid access cards, short-term cash advances, free money orders, ATMs in every branch, wire transfers, notary services, fax services, and postage.  As of June 2016, Amscot Financial operated 239 branch locations in the Tampa Bay, Orlando and Miami media markets.

Arena District: Arena District is a mixed-use planned development and neighborhood in Columbus, Ohio.  The site was developed through a partnership between Nationwide Realty Investors, Ltd. (a subsidiary of Nationwide), the City of Columbus and private investors.  Interpretation of the boundaries of the district are evolving as the neighboring blocks around the original 75 acre site has seen additional commercial and residential development.  Arena District is named for Nationwide Arena.

Financial Services Roundtable: The Financial Services Roundtable (FSR) is an American financial services lobbying and advocacy organization, located in Washington, D.C..  FSR was formerly called the Bankers Roundtable, but was renamed in 2000 to reflect the widening membership of the organization beyond bank holding companies.  FSR "represents 100 of the largest integrated financial services companies which provide banking, insurance and investment products and services to American consumers."  The members of FSR are the CEOs of the 100 largest financial services companies with additional C-Suite level executive representatives from each company.  The current President and CEO of the Financial Services Roundtable is Tim Pawlenty, a former governor of Minnesota.

Space Angels Network Inc: Space Angels (formerly known as Space Angels Network Inc.) is a privately-held financial services company with a group of angel investors who are focused exclusively on the aerospace industry.  It is based in New York with virtual offices in London, Los Angeles, Hong Kong, Seattle, San Francisco, Stockholm, and Zurich.  The typical investment is between $500,000 to $1,000,000 USD of equity.  Space Angels operates as a financial services company in that it offers deal discovery, manages the deal flow pipeline, conducts due diligence, facilitates equity investment, and manages portfolio investments.  More recently, it has developed an online platform with virtual deal rooms, where investors can see deal information and execute on investments.

Wachovia: Wachovia (former NYSE ticker symbol WB) was a diversified financial services company based in Charlotte.  Before its acquisition by Wells Fargo in 2008, Wachovia was the fourth-largest bank holding company in the United States based on total assets.  Wachovia provided a broad range of banking, asset management, wealth management, and corporate and investment banking products and services.  At its height, it was one of the largest providers of financial services in the United States, operating financial centers in 21 states and Washington, D.C., with locations from Connecticut to Florida and west to California.  Wachovia provided global services through more than 40 offices around the world.  The purchase of Wachovia by Wells Fargo and Company was completed on December 31, 2008.  Wells Fargo acquired Wachovia after a government-forced sale to avoid a failure of Wachovia.

Advance Financial: Advance Financial is a family owned non-banked consumer financial services company based in Nashville, Tennessee employing over 700 employees and has been named to the Inc.com 5000 list of the fastest-growing private companies in the country for the fifth year in a row.  The company was founded in 1996.  Advance Financial is an active member in several trade organizations including Community Financial Services Association of America, Financial Service Centers of America where the founders, Mike & Tina Hodges serve on the board of directors and Online Lenders Alliance.  Tina Hodges has been awarded with a Gold in the Female CEO of the Year category by CEO World Awards®.

Allianz: Allianz SE ( ; ] ) is a German financial services company headquartered in Munich, Germany.  Its core businesses are insurance and asset management.  As of 2014, it is the world's largest insurance company, the largest financial services group and the largest company according to a composite measure by "Forbes" magazine, as well as the largest financial services company when measured by 2013 revenue.  The company is a component of the Euro Stoxx 50 stock market index.

SBI Life Insurance Company: SBI Life Insurance is a joint venture life insurance company between State Bank of India (SBI), the largest state-owned banking and financial services company in India, and BNP Paribas Cardiff.  BNP Paribas is a French multinational bank and financial services company with global headquarters in Paris.  SBI owns 70.1% of the total capital and BNP Paribas Cardiff 26% of the capital.  Other investors are Value Line Pte. Ltd. and MacRitchie Investments Pte. Ltd., holding 1.95% of the total capital each.  SBI Life Insurance has an authorized capital of () and a paid up capital of () .  SBI Life Insurance also features in the Fortune Global 500 list of the world’s biggest corporations.

Daniel Milstein: Daniel Milstein (born Дэн Мильштейн, November 8, 1975), is a Ukrainian American entrepreneur and writer.  In 2000, he founded Gold Star Financial Group, a financial services company that specializes in prime mortgages.  Milstein's books include the bestseller "17 Cents and a Dream" about his family's escape from Ukraine the day it affirmed its independence from the Soviet Union in 1991.  His family was granted asylum in the United States and settled in Michigan.  Milstein founded and owns Gold Star Group, which includes a financial services company and a sports management agency that represents Pavel Datsyuk, among others.

Nationwide Mutual Insurance Company: Nationwide Mutual Insurance Company and affiliated companies is a group of large U.S. insurance and financial services companies based in Columbus, OH.  The company also operates regional headquarters in Des Moines, IA; San Antonio, TX; Gainesville, FL; Raleigh, NC; and Westerville, OH.  Nationwide currently has approximately 31,000 employees, and is ranked #69 in the most recent Fortune 500.  Nationwide is currently ranked #71 in Fortune's "100 Best Companies to Work For".

Supporting paragraphs: Arena District Nationwide Mutual Insurance Company
Answer: Nationwide Mutual Insurance Company