Earnings Season

Earnings season is the period in each quarter when the bulk of public companies publish their results, so called because reports arrive in a dense cluster rather than evenly through the year. No rule defines the phrase. What the rules define is the calendar that produces it. Every company with registered securities faces filing deadlines measured from the end of its own fiscal quarter or fiscal year, and because a large share of listed companies use the same fiscal calendar, their deadlines fall together. The term is therefore a market label for a mechanical consequence of two filing rules, and the most useful thing to know about it is that the document the market usually reacts to is not the one the deadlines govern.

Three quarterly reports a year, not four, and this is the fact almost every consumer explainer gets wrong. 17 CFR 249.308a(a) provides that a Form 10-Q "shall be filed within the following period after the end of the first three fiscal quarters of each fiscal year, but no quarterly report need be filed for the fourth quarter of any fiscal year." The periods are 40 days after the quarter end for large accelerated filers and accelerated filers, and 45 days for all other registrants. Fourth-quarter results are not skipped; they arrive inside the annual report on Form 10-K, which is due 60 days after the fiscal year end for a large accelerated filer, 75 days for an accelerated filer and 90 days for everyone else. So the fourth reporting event of the year is both later and larger than the other three, which is why, for a company whose fiscal year ends in December, the reports arriving in February and March look different from the ones arriving in April, July and October.

Why it clusters, stated as a mechanism rather than a mood. The deadlines run from each company's own fiscal period end, not from a common date. Two companies whose fiscal years end in different months have deadlines in different months, and a company with a January fiscal year end reports on its own schedule regardless of what the rest of the market is doing. The cluster exists because fiscal calendars are not evenly spread: Nasdaq told the SEC, in a 2022 rule filing, that "[a]pproximately 80% of Nasdaq-listed companies subject to the rule have a December 31st fiscal year-end." Two limits on that figure are worth stating. It is Nasdaq's own count, as of 2022, and "the rule" in it is the particular listing rule Nasdaq was amending in that filing rather than a reporting rule, so the figure describes a subset of the companies on one exchange and is not a count of every US issuer. Read for what it does support, it is evidence that December fiscal years are the common case among listed companies, which is enough to explain the phenomenon.

The number the market trades on and the number the rules assure are not the same number. Interim financial statements in a Form 10-Q are subject to 17 CFR 210.10-01(d), which provides that "[p]rior to filing, interim financial statements included in quarterly reports on Form 10-Q ... must be reviewed by an independent public accountant using applicable professional standards and procedures for conducting such reviews." A review is a lower level of assurance than an audit, and the annual statements are audited. The earnings release is a third thing again. The SEC has stated that "quarterly earnings releases furnished with an Item 2.02 Form 8-K differ from Form 10-Q financial information because they are not required to be reviewed by an independent public accountant," and in the same release added that the furnished information is also not required to be prepared in accordance with GAAP, though it remains subject to the non-GAAP measure requirements of Regulation G and 17 CFR 229.10(e)(i), is not required to be data tagged, and need not carry the disclosures or certifications about disclosure controls or internal control over financial reporting. So the ordinary sequence is that the least assured document arrives first and is the one priced.

None of it is legally compelled as a performance. The SEC put this plainly in 2026: "Federal securities laws do not impose general duties upon Exchange Act reporting companies to announce or publish earnings, conduct earnings calls, or issue earnings guidance." The footnote attached to that sentence adds the qualifier that matters, noting that where earnings information is selectively disclosed to certain covered persons, Regulation FD requires disclosure in a Form 8-K filing or another method reasonably designed to provide broad, non-exclusionary distribution. The practice is voluntary; once a company starts talking selectively, the selective disclosure rules bite.

One proposal could change the cadence, and it has not. In May 2026 the SEC proposed to let companies file semiannual reports on a new Form 10-S in place of Form 10-Q, with comments due July 6, 2026. As of September 4, 2026 the proposal has not been adopted, so quarterly reporting remains required and the calendar above is the operative one. The proposing release also states that the proposal makes no general change to the rules governing earnings releases or guidance practices, and acknowledges that a company electing semiannual reporting might stop holding quarterly earnings release conference calls.

A fiscal quarter ends. The company closes its books, and its accountant reviews the interim statements. Before or around the filing, the company usually issues an earnings release and furnishes it on Form 8-K, then holds a call. The Form 10-Q follows within the deadline. After the fourth quarter there is no 10-Q, and the results appear in the audited annual report instead. Because most large companies share a December fiscal year end, these steps happen for hundreds of companies within the same few weeks, four times a year.

A worked example, using one company's calendar. Consider a large accelerated filer whose fiscal year ends December 31, 2026. Its first three quarters end March 31, June 30 and September 30 of 2026. Adding the 40-day quarterly deadline to each gives filing dates of May 10, 2026 (March has 31 days, so April 30 is day 30 and May 10 is day 40), August 9, 2026 (July 31 is day 31, so August 9 is day 40) and November 9, 2026 (October 31 is day 31, so November 9 is day 40). There is no fourth-quarter 10-Q. Instead the annual report is due 60 days after December 31, which is March 1, 2027. Four reporting events, three of them on a 40-day clock and the fourth on a 60-day one. A company that is not an accelerated filer would add five days to each quarterly date and thirty days to the annual one.

Pros

• It concentrates disclosure, so a diversified holder learns a great deal about their portfolio in a short window.
• The deadlines are fixed by rule and public, so the timing of the information is knowable in advance.
• The reports are comparable across companies because the same items are required of each.
• The fourth-quarter report is audited rather than merely reviewed, so the year's final figures carry the highest level of assurance the rules require.

Cons

• The document the market usually reacts to is the earnings release, which is not required to be reviewed by an accountant, prepared under GAAP, or data tagged.
• Three quarters get a 10-Q and the fourth does not, so a reader looking for four quarterly reports a year will not find them.
• The clustering means several holdings can report in the same week, which compresses the time available to read any of them.
• A company can stop issuing releases, calls or guidance at any time, because no rule requires them.