Question: DVB Bank SE is part of which second largest bank in Germany by asset size and the central institution for more than 1,000 co-operative banks and their 12,000 branch offices?
Context: Delta Community Credit Union is the largest credit union in Georgia in terms of both asset size and membership.  With more than $5B in assets and 350,000 members, it also ranks among the top 25 largest credit unions in the U.S. Its membership comes from those who live or work in 11 Atlanta metro area counties.  Some of the companies the credit union serves are: Delta Air Lines, Chick-fil-A, RaceTrac and UPS.  As a not-for-profit credit union, it gives back its earnings to its customers and their local communities.  Delta Community is a state-chartered credit union organized under the Georgia Department of Banking and Finance and federally insured by the National Credit Union Share Insurance Fund.  There are currently 27 branch offices with assets of more than $5B.  It is a member of CO-OP, formerly known as CU Service Centers, a nationwide cooperative that allows customers to bank at over 3,500 credit unions and over 5,000 branches. DVB Bank SE is part of the DZ BANK Group and a specialist in international transportation finance, based in Frankfurt/Main, Germany. ICCREA Group known formerly as Istituto Centrale delle Casse Rurali ed Artigiane, is a central institution of Italian credit unions and rural saving banks.  The holding company of the group was ICCREA Holding (from 1995–2016), while ICCREA Banca, ICCREA BancaImpresa and several companies were subsidiaries .  However, ICCREA Banca revered merger with ICCREA Holding in mid-2016, as part of the banking reform of Italy.  The co-operative banks of Italy would create strong central banks (Cassa Centrale Banca had also applied to be another central bank) with power to recapitalize individual co-operative bank. Volksbanken und Raiffeisenbanken is a brand of co-operative banks in Germany. " Volksbank" derives from People's Bank institutes (co-operatives originally created by a local population often based in a town) and "Raiffeisenbanken" refers to banks founded on initiatives by Friedrich Wilhelm Raiffeisen (who was pioneering farmer credit unions).  Many co-operative banks in Germany have either "Volksbank" or "Raiffeisenbank" in their name – the nationwide services and associations in the co-operative branch of the German financing industry used the compound of the plurals of these words (so it translates as "Peoples banks and Raiffeisen banks"). Mehraj Mattoo (महराज मट्टू ) is a British investment banker, economist and author; currently a Senior Fellow at Harvard University.  He is the Co-founder and CEO of Commonwealth Asset Management.  According to the UK and Cayman Islands company records, Commonwealth Asset Management is majority owned by NR Investments, the investment vehicle of the Rothschild Family.  Before co-founding Commonwealth, Dr. Mattoo was Global Head of Asset Management at Commerzbank AG, leading one of the largest hedge fund and private equity groups globally (Investhedge 2009; The Billion Dollar Club).  Prior to Commerzbank, Dr. Mattoo was the Managing Director of Dresdner Kleinwort Wasserstein, the investment banking arm of Dresdner Bank AG, the second largest bank in Germany.  In the mid-1990s, Dr. Mattoo co-founded the first fund derivatives group in the City at BNP Paribas, the largest French/global bank by assets.  He is widely credited for pioneering the use of structured products on alternative investments, especially hedge funds, that helped attract institutional assets to the hedge fund industry and contributed to its explosive growth over the following decade.  In the early 1990s, Dr. Mattoo established and led the Structured Products business at NatWest Markets, the investment banking arm of Britain's largest bank, National Westminster Bank, now part of RBS Group and led an educational effort aimed at promoting responsible use of derivatives by corporations and institutional investors. TakarékBank is a banking and financial services corporation in Hungary and it is the central institution for more than 60 co-operative banks and their 1,100 branch offices.  TakarékBank consolidates its co-operative banks and forms the Takarék Group, which is the fourth largest bank in Hungary by AUM of 1,889 billion Hungarian forint. The Cosmos Co-operative Bank Ltd. (Cosmos Bank), established in 1906, is one of the oldest Urban Co-operative Banks in India.  Cosmos Bank celebrated its centenary on 18 January 2006.  It is one of the first co-operative banks in the country to implement Core Banking System (CBS) across the entire network of its then 137 service outlets using Finacle-Infosys Core Banking Software.  It also received an authorized dealer (AD) license from the Reserve Bank of India to become the third co-operative bank in India to have such a license in thirty years. DZ Bank AG is the second largest bank in Germany by asset size and the central institution for more than 1,000 co-operative banks and their 12,000 branch offices.  Within the Volksbanken Raiffeisenbanken Co-operative financial network, which is one of Germany's largest private sector financial service organisations, DZ Bank functions both as a central institution and as a corporate and investment bank. The Bankcard-Servicenetz ("bank card service network") is a German ATM card interbank network group provided by the Volksbanken und Raiffeisenbanken services group.  Technically it is not an interbank network but uses the pre-existing girocard network.  Member banks of this cash credit group charge ATM usage fees at a low level and most customers of the co-operative banks enjoy free withdrawal from their accounts.  With 19,200 ATMs the Bankcard-Servicenetz group is the second largest ATM group in Germany (after the savings banks network). The Bank of New England Corporation was a regional banking institution based in Boston, Massachusetts, which was seized by the Federal Deposit Insurance Corporation (FDIC) in 1991 as a result of heavy losses in its loan portfolio and was placed into Chapter 7 liquidation.  At the time, it was the 33rd largest bank in the United States, and its federal seizure bailout was the second largest on record.  At its peak, it had been the 18th largest bank and had over 470 branch offices.  The liquidation company was named Recoll Management Corporation and its bankruptcy estate has continued to exist to pay out claims against the company.  As of 2016, most of what was once Bank of New England is now part of Bank of America.
Answer: DZ Bank AG