Final answer:
Non-accelerated filers must file their Form 10-K within 75 calendar days of the fiscal year-end.
Step-by-step explanation:
The category of filers that must file their Form 10-K within 75 calendar days of the fiscal year-end is non-accelerated filers. Non-accelerated filers refer to companies that have a public float below $75 million and do not meet the requirements to qualify as accelerated or large accelerated filers.