Sometimes. As of October 2026, SEC Regulation S-X Rule 3-05 requires audited financial statements of an acquired business only if it is "significant": more than 20% on the investment, asset or income test. Above 20%, the public buyer files one audited fiscal year plus the latest interim period; above 40%, two audited years. Smaller reporting companies apply the same thresholds through Rule 8-04, no filer has to provide more than two years, and a business that stays under 20% on every test needs no separate acquiree financials.
Only when the purchase is significant to the buyer. Rule 3-05 of Regulation S-X applies once an acquisition has closed or is probable, and it measures significance with the "significant subsidiary" tests. A small holding company that reports to the SEC, or files a registration statement, is covered. My view is that most first deals by a micro-cap holdco are small enough to avoid the rule, but the second and third deals often are not.
Three tests run side by side, and the highest result decides:
The market value in the investment test is an average over the last five trading days of the month before the deal is announced or agreed. A thinly traded stock can swing that denominator.
The fiscal-year statements must be audited. Interim statements need not be.
Worked example (assumptions, not a real company). A holding company has an average market value of $20.0M. It looks at three targets using the investment test alone:
The asset and income tests could still push a deal into a higher bucket. A target with thin assets but high income often fails the income test first.
The SEC can also look at small deals in combination, so a string of purchases that are each under 20% may still lead to extra disclosure. Rule 3-05(b)(2)(iv) adds up deals whose statements were not required, counting from the date of the buyer's most recent audited balance sheet. As I read it, this matters when the buyer files a registration statement or proxy statement, not for the Form 8-K itself. If the total passes 50% on a test, that filing may need pro forma information covering those deals.
How this works depends on the facts of each filing, including which deals count, how the tests are measured and which statements have already been filed. Have a securities lawyer confirm how it applies to your deals before you rely on it.
As arithmetic only, using the same $20.0M example, four deals of $3.0M each total $12.0M, or 60%, which is above 50% even though no single deal reached 20%. Three such deals total $9.0M, or 45%, which is below it. These numbers show the mechanics, not a conclusion about any real filing.
Partly. Rule 8-04 tells a smaller reporting company to apply Rule 3-05, substituting the Article 8 form and content rules for the general ones. The significance thresholds are therefore the same. Since the 2020 amendments, no buyer, large or small, has to provide more than two fiscal years of acquiree statements, so the two-year limit is not special relief for small companies. The difference is in content. SEC staff guidance says a buyer under Rule 8-04 may let a non-reporting target use scaled smaller-reporting-company disclosure, while a buyer under Rule 3-05 needs the target's full statements. Pro forma information for smaller reporting companies follows Rule 8-05, which points back to Article 11.
A closing that involves a significant amount of assets is reported on Form 8-K under Item 2.01. The form's instruction treats a deal as significant if the price paid, or the net book value acquired, exceeds 10% of the buyer's total assets, or if the business acquired is significant at the 20% level under Article 11. That closing is reported on Form 8-K within four business days. If the target also exceeds 20% on a Rule 3-05 test, its financials and pro forma information can follow by amendment under Item 9.01, no later than 71 calendar days after the date the first 8-K was due. The same deadline applies to the pro forma information. Separate statements can stop once the target's results sit in the buyer's audited consolidated statements: after nine months for a deal in the 20% to 40% bucket, after a full fiscal year for one above 40%.
Not for a private target. SEC staff guidance says a non-issuer's audit under Rule 3-05 does not need a PCAOB-registered auditor, and an audit under U.S. generally accepted auditing standards is acceptable. Compilation reports are not accepted in any filing. Confirm independence and report wording with your auditor before engaging one.
Where these numbers come from: Thresholds, periods, aggregation and omission rules are from 17 CFR 210.3-05 (Cornell LII copy). The significance tests and five-day market value are from 17 CFR 210.1-02 (Cornell LII copy). Smaller reporting company mechanics are from 17 CFR 210.8-04 (Cornell LII copy), 17 CFR 210.8-05 (Cornell LII copy) and SEC Financial Reporting Manual, Topic 2 (section 2030.5). The two-year cap is noted in SEC Release 33-10786, and the post-2020 treatment of individually small deals is summarized in the Katten client advisory on the 2020 amendments. Item 2.01 (Instruction 4), Item 9.01 and the 71-day period are from SEC Form 8-K. Auditor guidance is from Topic 4 (sections 4110.5 and 4430). The $20.0M figures are illustrative. Confirm the application to your deal with securities counsel and your auditor.
Rule 3-05 applies to SEC registrants. A holding company that is not an SEC filer is not bound by it, though a lender or investor may ask for audited statements anyway.
No. A quality of earnings report is a diligence tool, not an audit, and an SEC filing needs the audit when the rule applies. See whether you need a quality of earnings report.
The form of payment does not change the test. The investment test counts the fair value of the shares, so a stock deal is measured like a cash deal.
If the target has never been audited, read how a public company buys a business that has never had an audit.
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