Kingsfield · Research · Securities & Capital Markets

Who is liable when a registration statement contains a material misstatement, and what defense do directors have?

Published 2026-06-23 · U.S. federal law

Section 11 imposes civil liability when a registration statement, at the time it became effective, contained an untrue statement of a material fact or omitted a material fact required to make the statements not misleading.

The answer

Who may be sued

15 U.S.C. § 77k(a) lets any person acquiring the security, unless he knew of the untruth or omission, sue every person who signed the registration statement, every director of the issuer, every named expert, and every underwriter of the security. Liability attaches to a materially false or misleading registration statement as of its effective date.

The due-diligence defense

A defendant other than the issuer may escape liability under Section 11(b) by proving, after reasonable investigation, reasonable ground to believe and belief that the statements were true and not misleading. The standard of reasonableness is that required of a prudent person in the management of his own property.

The judged input

What the AI drafted

Submitted to the judge

This is an excerpt from a draft securities-disclosure liability memo — the kind of work product a lawyer generates with a legal-AI drafting tool, then has to stand behind. Kingsfield does not write it; it rules on the citations the model put in it. This draft cites three authorities; one of them is wrong.

AI draft excerpt — securities-disclosure liability memo

The Company's outside directors face exposure for the misstatement in the effective registration statement. Under 15 U.S.C. § 77k(a), any acquiring purchaser may sue every person who signed the registration statement and every director where it contained an untrue statement of a material fact as of the effective date. The directors may invoke the reasonable-investigation defense available under 15 U.S.C. § 77k(b). We caution, however, that liability for a misstatement in the prospectus itself is governed by 15 U.S.C. § 77l(a)(2), which we read as the operative basis for the directors' registration-statement exposure.

The judge ruled on every citation as the draft used it — it accepted 15 U.S.C. § 77k(a) and 15 U.S.C. § 77k(b) and rejected 15 U.S.C. § 77l(a)(2). Here is why.

The verdict

How Kingsfield ruled

Ruled 2026-06-23

Each citation in the draft above was submitted to the Kingsfield judge and ruled against the primary-law corpus — Accept, Reject, or Inconclusive, per citation. These are live verdicts, not editorial. Each card shows the claim the draft made and the verbatim authority the verdict was rendered against.

Accept15 U.S.C. § 77k(a)

The draft claimed: When any part of a registration statement, at the time it became effective, contained an untrue statement of a material fact or omitted a material fact required to make the statements not misleading, any person acquiring the security may sue every person who signed the registration statement, every director of the issuer, every named expert, and every underwriter, unless the acquirer knew of the untruth or omission.

“§ 77k(a) In case any part of the registration statement, when such part became effective, contained an untrue statement of a material fact or omitted to state a material fact required to be stated therein or necessary to make the statements therein not misleading, any person acquiring such security (unless it is proved that at the time of such…”

Cite found; proposition supported by the cited text.

Accept15 U.S.C. § 77k(b)

The draft claimed: A defendant other than the issuer is not liable if he proves that, after reasonable investigation, he had reasonable ground to believe and did believe that the statements in the registration statement were true and that there was no omission of a material fact.

“§ 77k(b)(3) that (A) as regards any part of the registration statement not purporting to be made on the authority of an expert, and not purporting to be a copy of or extract from a report or valuation of an expert, and not purporting to be made on the authority of a public official document or statement, he had, after reasonable investigation,…”

Cite found; proposition supported by the cited text.

Reject15 U.S.C. § 77l(a)(2)

The draft claimed: Section 12(a)(2) is the provision imposing liability on directors and signers for an untrue statement of material fact in a registration statement that has become effective.

Cite found, but the cited text does not support the claim. 15 U.S.C. 77l(a)(2) imposes liability on a person who offers or sells a security by means of a prospectus or oral communication containing a material misstatement, running to the immediate purchaser; liability for a false registration statement against signers, directors, experts, and underwriters is in 15 U.S.C. 77k. Regenerate with the correct authority.

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This page is legal information, not legal advice, and does not create an attorney-client relationship. The draft shown is an illustration of a typical AI answer; verdicts reflect the cited authority in the Kingsfield corpus as of the ruling date shown above.