NASDAQ OMX Group (NDAQ)

unforeseen difficulties, costs or complications in combining the companies’ operations, which could lead to us not achieving the synergies we anticipate;

unanticipated incompatibility of systems and operating methods;

inability to use capital assets efficiently to develop the business of the combined company;

the difficulty of complying with government-imposed regulations in both the U.S. and Europe, which may be different from each other;

resolving possible inconsistencies in standards, controls, procedures and policies, business cultures and compensation structures among the combined companies;

the diversion of management’s attention from ongoing business concerns and other strategic opportunities;

the integration of the respective businesses, operations and workforces;

unforeseen difficulties in operating acquired businesses in parallel with similar businesses that we operated previously;

unforeseen difficulties in operating businesses we have not operated before;

unanticipated difficulty of integrating multiple acquired businesses simultaneously;

the retention of key employees and management;

the implementation of disclosure controls, internal controls and financial reporting systems at non-U.S. subsidiaries to enable us to comply with U.S. generally accepted accounting principles, or U.S. GAAP, and U.S. securities laws and regulations, including the Sarbanes Oxley Act of 2002, required as a result of our status as a reporting company under the Exchange Act;

the coordination of geographically separate organizations;

the coordination and consolidation of ongoing and future research and development efforts;

possible tax costs or inefficiencies associated with integrating the operations of the combined company;

pre-tax restructuring and revenue investment costs;

the retention of strategic partners and attracting new strategic partners; and

negative impacts on employee morale and performance as a result of job changes and reassignments.