This report provides an analysis of auditing and ethics principles as applied to Altium Limited, a software company. It begins by defining auditing and its importance in ensuring accurate financial reporting. The report then examines the concept of materiality and its application to Altium, including materiality levels for operating profit, total assets, net profit, and shareholders' equity. A financial analysis of Altium is presented, covering the years 2015 to 2018, with key financial ratios such as current ratio, acid test ratio, debtor days, creditor days, operating profit margin, net profit margin, return on assets, and return on capital employed. Trends and changes in these ratios are interpreted. Finally, the report analyzes Altium's cash flow statements, identifying the major sources of cash inflows and outflows from operating, investing, and financing activities, and outlining the primary cash receipts and payments. The report concludes with a discussion of financial statement assertions, including accuracy, completeness, existence, understandability, and valuation.