Recently, I’ve found that many new investors actually aren’t very good at keeping track of when quarterly earnings reports are released. That’s unfortunate, because earnings season is often when stock prices fluctuate the most. I’ve also experienced a few moments of being “caught off guard,” and that’s when I realized just how important it is to know the release schedule for each quarter in advance.

First, let’s talk about the Taiwan stock market. Taiwan’s financial reporting rules are actually much stricter than those in the U.S. All listed companies must announce their financials within the statutory deadlines, with very little flexibility. For example, for the 2025 annual report, companies with paid-in capital of less than 10 billion—(NT$)—must publish their self-prepared financial information by March 16. For most companies, the statutory cutoff date is March 31, while financial holding companies get until April 30. As for mega-companies such as TSMC and MediaTek, starting in 2026, annual report requirements will be earlier, with filings due by March 15.

When it comes to the quarterly earnings release dates, Taiwan’s stock market also has clear rules. The statutory cutoff for Q1 2026 is May 15, for Q2 it’s August 14, and for Q3 it’s November 14. However, in practice many large companies hold investor briefings (earnings presentations) ahead of the official deadlines, and they usually publish the reports before the cutoff date—so stock price volatility tends to be higher during this period. I’ve noticed that mid to late April is the peak season for these investor briefings; for instance, TSMC typically holds its quarterly earnings presentation around April 16.

Taiwan also has a globally uncommon rule: before the 10th of every month, companies must announce the previous month’s revenue. Because the numbers are immediate, this is often treated as a leading indicator ahead of the quarterly reports. If you want to look up the release schedule and the specific figures for each quarter’s earnings reports, the most authoritative source is the Market Observation Post System (MOPS). You can also use the investor briefing calendar feature in brokerage apps.

The situation in the U.S. is quite different. In the U.S., annual reports are filed using Form 10-K, and the filing deadlines depend on the company’s size. Large companies with a public float of more than $700 million must file within 60 days after the end of the fiscal year; mid-sized companies have 75 days; small companies have 90 days. For companies with a fiscal year ending in 2025, the deadline for large companies is March 2, 2026. Non-U.S. companies file using Form 20-F, which has a more relaxed timeline—they can complete filing within 4 months after the fiscal year ends.

U.S. annual reports are generally released from late January to the end of February. Most companies issue press releases and hold investor calls either before market open or after hours. As for quarterly earnings release dates, the filing deadlines for U.S. quarterly reports (10-Q) also depend on company size: large companies must submit within 40 days after the end of the quarter, while small companies have 45 days. For Q1 2026, the deadline for large companies is May 11. But in reality, investor calls often begin earlier—usually about 15 days after the quarter ends. Banks tend to go first, and then comes the “super earnings week” for tech stocks. TSMC’s ADR will be announced on April 16, Tesla on April 22, and Microsoft, Alphabet, Meta, and Amazon on April 29. Apple will be announced on May 1.

The most direct way to check U.S. earnings data is through the SEC’s EDGAR database: by entering a company’s ticker or name, you can find the complete 10-K and 10-Q filings. You can also check the investor relations section of each company’s website in advance for the schedule of each quarter’s earnings releases. Yahoo Finance, Nasdaq’s website, Investing.com, and SeekingAlpha all have organized earnings calendars, making it convenient to track multiple companies at once.

To be honest, knowing the timing of quarterly earnings releases can have a pretty significant impact on investment decisions. Whether it’s Taiwan or the U.S., planning ahead and setting up a tracking list ahead of earnings season helps you avoid being caught off guard by sudden stock price swings. I hope this information will be helpful to everyone during the upcoming earnings season.