Financial performance is a measure of how well a company is doing from a financial perspective. It provides insight into long-term sustainability, operational efficiency, and the effectiveness of management decisions. The financial performance of a company can be evaluated through a variety of different methods, such as financial ratios, financial statements, and indicators.

The Form 10-K is an annual report that public companies are required to file with the Securities and Exchange Commission (SEC). It provides information on the company's financial condition and operations, as well as results of operations, risk factors, and other information. The 10-K provides an up-to-date, reliable snapshot of a company's financial performance and is a must-have document for investors.

The balance sheet, income statement, and statement of cash flows are the three main financial statements used to evaluate the financial performance of a company. The balance sheet shows the company's assets and liabilities, while the income statement and statement of cash flows show the company's revenue and expenses. These statements also provide insight into management’s ability to manage the company’s resources and generate profits.

Financial performance indicators are important tools that measure how strong a company’s financial performance really is. Financial ratios, such as the return on assets, are financial indicators that provide insight into a company’s ability to generate profits relative to its assets. Other financial indicators, such as operating margin and debt-to-equity ratio, measure the company’s ability to access debt financing, generate profits, and manage its liabilities.

In conclusion, financial performance is an important aspect of gauging a company’s economic vitality. The 10-K, the balance sheet, the income statement, and the statement of cash flows are all important documents used to evaluate the financial performance. Financial performance indicators are also used to measure the company's financial health. No single measure should be used to define the financial performance of a company. Investors should take into account various measures of financial performance when evaluating a company.