Final answer:
Interim FS for U.S. companies are filed quarterly as Form 10-Q within 40 to 45 days after the end of each of the first three quarters of the fiscal year. The Form 10-K is an annual report filed after the fiscal year-end and includes audited financial statements.
Step-by-step explanation:
Interim financial statements (FS) for U.S. companies are typically filed on a quarterly basis. According to the Securities and Exchange Commission (SEC) regulations, publicly traded companies must file quarterly reports, known as Form 10-Q. These reports provide an update on the company's financial position and recent financial performance, and they are filed within 40 to 45 days after the end of each of the first three quarters of the company's fiscal year. The annual report, filed on Form 10-K, is a more comprehensive document that includes audited financial statements and is filed after the end of the company's fiscal year. Filing interim financial statements is crucial for maintaining transparency with shareholders and providing them with timely information about the company's performance and financial health.