United Airlines Holdings, Inc.

PRIMECAP invests primarily common stocks or securities with common stock characteristics, bonds and cash/cash equivalents. The firm utilizes fundamental research and bottom-up stock picking to construct portfolios. The main sources of information for research purposes include financial publications, inspections of corporate activities, research materials by others such as sell-side analysts, companies' annual reports and any related filings and press releases, meetings with executives of companies and their suppliers, competitors, customers, etc. All portfolios are built with the best ideas of each of the managers within the multi-manager investment process. PRIMECAP's investment strategy does not employ short sales or margin transactions, nor does it permit investments in derivatives or currency hedging. The firm follows an investment approach based on four key principles including commitment to fundamental research, long-term investment horizon, emphasis on individual decision-making and focus on value.

Berkshire Hathaway employs the value investing principles of Benjamin Graham. Their investment approach focuses on buying shares of companies as a long-term investment. The firm seeks to invest in businesses that are easy to understand and have high ROE, exceptional management teams and limited debt. Rather than a diversified stock portfolio, Berkshire Hathaway invests in a small number of trusted investments that are overweighed in order to leverage the expected returns. The firm owns stock in a diverse group of over 50 public and private companies in wide range of industries including, but not limited to, manufacturing, retail, energy and finance. Investments are typically financed using the float from Berkshire Hathaway, Inc.'s insurance operations. Securities are sold when the firm no longer feels comfortable with the fundamentals of a company.

PCM seeks to maximize after-tax capital appreciation by assuming high levels of risk in an aggressively managed portfolio of securities. There are no restrictions on the type of instruments in which they may invest, although PCM invests primarily in publicly traded equity securities, as well as options, warrants, and swaps related to equity securities. The firm makes investment decisions on the basis of fundamental security analysis which is premised on research into the capital structure, financial statements and management of a company. Portfolio managers conduct such research by reference to, among other things, regulatory filings by issuers, data provided by regulatory agencies, discussions and meetings with executives and industry experts, periodicals and on-line news sources, third-party research and independent data providers. After the research, portfolio managers will form the basis for investment decisions through the judgments about the financial strength, valuation and outlook of a company.