Recently, while checking the quarterly report release schedule, I realized that the reporting rules for Taiwan stocks and U.S. stocks are quite different. As an investor, knowing when quarterly reports are released is actually more important than you might think, because it directly affects whether you can get ahead of the information.

Let’s start with Taiwan stocks. Taiwan’s regulations are quite strict regarding the disclosure of financial reports, and all listed companies must complete their filings within the required deadlines. The quarterly report release dates for 2026 are basically fixed: Q1 reports must be announced no later than May 15, Q2 is August 14, and Q3 is November 14. If you’re following large companies like TSMC, they typically release earlier, so there’s no need to wait until the deadline.

Here’s a detail that many people overlook—Taiwan stocks also have a globally rare rule: by the 10th of every month, companies must announce the previous month’s revenue. Because the numbers are relatively up to date, investors often treat it as a leading indicator ahead of the quarterly report release schedule.

The logic for U.S. stocks is different. U.S. annual reports are filed as Form 10-K, and quarterly reports are filed as Form 10-Q. The filing deadlines are divided into three tiers based on company size. Large companies have 40 days after the end of the quarter to submit their quarterly reports, while smaller companies have 45 days. But it’s important to note that the statutory filing deadline and the actual time when the financial reports are released are two different things. Most U.S. companies tend to release their reports early, especially technology stocks, which usually begin publishing quarterly reports about 15 days after the quarter ends.

When I track quarterly report release times myself, I find the most practical approach is to check the company’s Investor Relations website directly. For U.S. stocks, you can quickly get the schedules for multiple companies using platforms like Yahoo Finance, the Nasdaq official website, or Yingwei Finance. For Taiwan stocks, the most accurate source is the Market Observation Post System (MOPS).

To be honest, knowing the quarterly report release schedule is very helpful for short-term trading, because stock prices often fluctuate more before and after the reports are published. If you want to catch opportunities during earnings season, planning the release timetable of key companies in advance basically means you’re already halfway there.