SEC Rule 430

Overview and Regulatory Purpose

Section 5 of the Securities Act of 1933 establishes the central prohibition on the offer and sale of securities without an effective registration statement and a delivered prospectus. Section 5(b)(1) specifically prohibits the transmission of any prospectus relating to a security unless that prospectus meets the requirements of Section 10 of the Act. Section 10(a) specifies the information that a final, compliant prospectus must contain — including pricing information, underwriting compensation, and other terms dependent on the offering price that by definition cannot be known before the offering is priced.

Strictly applied, this framework would prevent any prospectus from being transmitted to investors until after the offering had been priced and the registration statement had become effective — eliminating the ability to market the offering to investors, build an order book, and conduct the price discovery process that is essential to the successful completion of any significant registered securities offering. 

The marketing of a registered offering requires that investors receive disclosure about the issuer's business, financial condition, and risk profile before they commit to purchasing — but the price at which they will purchase cannot be known until the book-building process, which depends on investor responses to that disclosure, has been completed.

Rule 430 resolves this tension by providing that a pre-effective prospectus — containing substantially all required information but omitting pricing-related information that depends on the offering price — is deemed to satisfy Section 10 for the limited purpose of Section 5(b)(1). 

This deemed compliance allows the preliminary prospectus to be transmitted to investors during the waiting period between the filing of the registration statement and its effectiveness without violating Section 5(b)(1), even though the preliminary prospectus does not meet the requirements of Section 10(a) because it lacks the pricing information that a final prospectus must contain. 

The Section 5(b)(2) prohibition on the sale of securities except by means of a final Section 10(a) prospectus remains in effect throughout the waiting period — Rule 430 enables the transmission of the preliminary prospectus for marketing purposes but does not authorise sales until effectiveness and the filing of the final pricing prospectus.

Statutory Authority and Rulemaking History

Rule 430 derives its statutory authority from Sections 5, 10, and 19 of the Securities Act of 1933. Section 5 establishes the prohibition framework within which Rule 430's deemed compliance mechanism operates; Section 10 specifies the requirements that a qualifying prospectus must meet and authorises the Commission to prescribe rules governing what information may be omitted; and Section 19(a) provides the Commission's general rulemaking authority. 

Together these provisions give the Commission authority to establish the conditions under which a pre-effective prospectus satisfies Section 10's requirements for the specific and limited purpose of Section 5(b)(1).

Rule 430 was originally adopted as part of the Regulation C framework in 1982, published at 47 FR 11440, March 16, 1982, codifying the pre-existing practice of using preliminary prospectuses during the waiting period. The rule was amended in December 1992 — 57 FR 56834 — and again in April 2002 — 67 FR 19868 — to add the investment company provision of Rule 430(b) and to make other technical adjustments. The rule was last amended November 21, 2011 — 76 FR 71876 — in connection with the XBRL interactive data requirements. No substantive amendments have been made since 2002 and no pending rulemaking proposes changes through June 2026.

Rule 430 sits at the foundation of the Rule 430 family — a suite of rules that together govern the conditions under which prospectuses at different stages of the offering process satisfy Section 10's requirements. Rule 430A, adopted in 1987, extended the omission permission to cover the at-effectiveness stage of a traditional IPO, permitting the registration statement to become effective with pricing information omitted. Rule 430B, adopted in the 2005 Securities Offering Reform, governs the post-effective prospectus for shelf registration statements. Rule 430C governs post-effective prospectuses in non-shelf offerings not covered by Rule 430A or 430B. Rule 430 itself remains the foundational pre-effective prospectus rule that applies to the waiting period stage for all registration statements.

Key Provisions and Operative Requirements

Rule 430(a) establishes the deemed compliance mechanism for the pre-effective prospectus. A form of prospectus filed as part of the registration statement shall be deemed to meet the requirements of Section 10 of the Act for the purpose of Section 5(b)(1) prior to the effective date of the registration statement, provided that such form of prospectus either contains substantially the information required by the Act and the Commission's rules to be included in a prospectus meeting the requirements of Section 10(a) of the Act for the securities being registered, or contains substantially that information except for the omission of information with respect to the offering price, underwriting discounts or commissions, discounts or commissions to dealers, amount of proceeds, conversion rates, call prices, or other matters dependent upon the offering price.

The deemed compliance under Rule 430(a) therefore rests on two alternative standards. Under the first standard, the preliminary prospectus contains substantially all of the information required in a final Section 10(a) prospectus — a standard met where the offering price is known before the registration statement is filed, as occurs in certain fixed price offerings. Under the second standard — the standard applicable to the overwhelming majority of IPOs and follow-on offerings — the preliminary prospectus contains substantially all required information except for the specific categories of pricing-related information that cannot be determined until the offering is priced. The categories of omissible pricing information are defined with precision: offering price, underwriting discounts or commissions, discounts or commissions to dealers, amount of proceeds, conversion rates, call prices, and other matters dependent upon the offering price. Information that does not fall within these categories cannot be omitted from the preliminary prospectus in reliance on Rule 430 — the preliminary prospectus must be substantially complete in all other respects to qualify for deemed compliance.

The provision that every form of prospectus deemed to comply with Section 10 under Rule 430(a) shall be deemed to have been filed as part of the registration statement for the purpose of Section 7 of the Act is a critical liability consequence. Section 7 requires that every registration statement include the consents of experts whose reports are contained in the registration statement. By deeming the preliminary prospectus to be part of the registration statement under Section 7, Rule 430(a) ensures that the expert consent requirements — including the consent of auditors whose financial statements appear in the preliminary prospectus — apply to the preliminary prospectus as well as to the final effective registration statement. This provision prevents the expert liability framework from being circumvented through the use of preliminary prospectuses that contain expert reports not formally part of the registration statement.

Rule 430(b) provides the parallel pre-effective deemed compliance mechanism for investment company registration statements filed on Forms N-1A, N-2, N-3, N-4, and N-6 — the registration forms used by open-end mutual funds, closed-end funds, separate account variable annuity products, and related investment company structures. A form of prospectus filed as part of an investment company registration statement on these forms shall be deemed to meet the requirements of Section 10 for the purpose of Section 5(b)(1) prior to the effective date, provided the form of prospectus meets the requirements of Rule 430(a) and the registration statement contains a form of Statement of Additional Information that is made available to persons receiving the prospectus upon written or oral request, and without charge, unless the form of prospectus contains the information otherwise required to be in the Statement of Additional Information. The Statement of Additional Information requirement reflects the two-part disclosure structure of investment company registration — the prospectus provides the investor-facing summary disclosure, while the Statement of Additional Information provides more detailed information available to investors who request it.

Scope of Application

Rule 430 applies to all registration statements filed under the Securities Act of 1933 that are in the waiting period between filing and effectiveness — the period during which no sales may occur but during which offers may be made and marketing materials transmitted pursuant to Rule 430's deemed compliance mechanism. The rule applies to Form S-1 IPO registration statements, Form S-3 shelf registration statements prior to their effectiveness, and to all investment company registration statements on the specified forms under Rule 430(b). Rule 430 does not apply to automatically effective registration statements under Rule 462(e) — automatic shelf registration statements filed by WKSIs become effective immediately upon filing, so there is no waiting period during which Rule 430 would operate. For automatic shelf registration statements, the relevant prospectus rules are Rule 430B for post-effective shelf prospectuses and Rule 433 for free writing prospectuses.

The deemed compliance of a preliminary prospectus under Rule 430 is subject to the requirement that it contain substantially the required information apart from permissible pricing omissions. A preliminary prospectus that omits material non-pricing information — such as complete financial statements, adequate risk factor disclosure, or a sufficiently detailed description of the issuer's business — does not satisfy Rule 430's substantially complete standard and does not benefit from its deemed compliance. The Commission staff enforces this standard through its review of preliminary prospectuses during the waiting period and issues comments requiring that material non-pricing omissions be corrected before the registration statement can become effective.

Relationship to Related Rules and Regulations

Rule 430 is the first member of the Rule 430 family and must be understood in the context of that family as a whole. Rule 430A — the pricing omission rule for traditional IPOs — builds directly on Rule 430's framework by extending the omission permission to the at-effectiveness stage of a conventional offering. Where Rule 430 permits pricing information to be omitted from the pre-effective preliminary prospectus, Rule 430A permits the registration statement to become effective with that pricing information still omitted, with the pricing information subsequently filed in the final prospectus pursuant to Rule 424(b) within two business days of pricing. The combined operation of Rule 430 and Rule 430A defines the complete pricing timeline of a traditional IPO: the preliminary prospectus circulates under Rule 430 during the waiting period, the registration statement becomes effective under Rule 430A with pricing information omitted, and the final pricing prospectus is filed under Rule 424(b) following pricing.

Rule 430B — the post-effective shelf prospectus rule — serves an analogous function in the shelf registration context. Where Rule 430 and Rule 430A govern the pre-effective and at-effectiveness stages of a traditional offering, Rule 430B governs the post-effective stage of shelf takedowns, specifying how information is added to the base prospectus through prospectus supplements and when that information is deemed part of the registration statement for Section 11 liability purposes. Rule 412's modification and supersession framework operates in conjunction with Rule 430B to maintain the currency of the shelf registration statement's disclosure record as new information is incorporated following effectiveness.

Rule 430's deemed compliance mechanism interacts directly with Rule 421's plain English requirements. The preliminary prospectus circulated during the waiting period under Rule 430's protection is subject to Rule 421(d)'s plain English mandate for its cover page, summary, and risk factors sections — these requirements apply regardless of the prospectus's pre-effective status. A preliminary prospectus whose risk factors section consists of dense, legalistic disclaimer language that violates Rule 421(d) does not satisfy Rule 430's substantially complete standard in the Commission staff's view, because a substantially complete preliminary prospectus is one that would be acceptable as a final prospectus except for the permissible pricing omissions.

The Rule 430 deemed compliance framework also connects to Section 11 of the Securities Act, which imposes liability for material misstatements or omissions in registration statements. Because Rule 430(a) deems the preliminary prospectus to be filed as part of the registration statement for Section 7 purposes, statements in the preliminary prospectus that are material misstatements are potentially subject to Section 11 liability even before the registration statement has become effective. This Section 11 exposure applies to the preliminary prospectus's non-pricing content from the moment it is filed with the Commission and circulated to investors, reinforcing the obligation to ensure the substantive accuracy of the preliminary prospectus from the outset of the offering process.

Amendment History and Regulatory Evolution

Rule 430's substantive framework has been remarkably stable since its original 1982 adoption — the core deemed compliance mechanism for pre-effective preliminary prospectuses has not been materially amended in over four decades. The rule's 1992 amendment added a technical provision; the 2002 amendment added Rule 430(b)'s investment company provision; and the 2011 amendment addressed the treatment of XBRL interactive data in the registration statement context. None of these amendments altered the fundamental structure of the rule's pre-effective deemed compliance mechanism.

The most significant evolution in the legal landscape surrounding Rule 430 since its adoption has been the progressive expansion of the Rule 430 family — the adoption of Rules 430A in 1987, 430B and 430C in 2005, and 430D subsequently — which collectively define the full spectrum of conditions under which prospectuses at different stages of the offering process satisfy Section 10. Rule 430 remains the foundational provision for the waiting period stage, and the stability of its framework reflects the Commission's satisfaction that its core mechanism — deemed compliance conditioned on substantial completeness with permissible pricing omissions — continues to function effectively in the modern offering environment.

The May 2026 Registered Offering Reform proposal does not propose amendments to Rule 430 itself, though the broader changes it contemplates to Form S-3 eligibility, automatic shelf registration access, and forward incorporation by reference would alter the population of registration statements that proceed through the traditional waiting period governed by Rule 430 versus the automatic effectiveness route that does not engage Rule 430's pre-effective deemed compliance mechanism at all.

Enforcement Context and SEC Action Patterns

Rule 430 enforcement arises primarily through the Division of Corporation Finance's registration statement review process during the waiting period. The staff reviews preliminary prospectuses filed with registration statements to assess whether they satisfy the substantially complete standard required for deemed compliance under Rule 430(a). Comment letters issued during the waiting period frequently require that non-pricing omissions or disclosure deficiencies be corrected in an amended registration statement before effectiveness is granted — because a registration statement whose preliminary prospectus fails to satisfy Rule 430's substantially complete standard cannot be declared effective until the deficiency is remedied.

A recurring enforcement context involves issuers that have attempted to use Rule 430's pricing omission permission as cover for broader non-pricing omissions — omitting financial statements that are not yet complete, omitting required business or legal proceedings disclosure, or leaving risk factors insufficiently developed on the basis that the prospectus is merely preliminary. The staff consistently takes the position that Rule 430's permission extends only to the specifically enumerated categories of pricing-related information and that the preliminary prospectus must be substantially complete in all other material respects.

The Commission has also addressed situations where issuers have treated the preliminary prospectus as a working draft subject to revision rather than as a substantially complete document subject to the full scope of the antifraud provisions. Statements in the preliminary prospectus that are material misstatements — even where the issuer characterises them as preliminary and subject to change — are subject to the antifraud provisions of the Securities Act from the date of the preliminary prospectus's filing and circulation.

Examination Relevance and Key Takeaways

Rule 430 is examined at the Series 7 and SIE levels in the context of the registered offering process and the timeline from filing to effectiveness. Candidates should understand the concept of the preliminary prospectus — commonly called the red herring — as a pre-effective prospectus that satisfies Rule 430's deemed compliance standard by containing substantially all required information except for permissible pricing-related omissions. The specific categories of omissible information — offering price, underwriting discounts or commissions, discounts or commissions to dealers, amount of proceeds, conversion rates, and call prices — are directly examined in the context of what may be omitted from a preliminary prospectus and what may not.

The distinction between Section 5(b)(1) — governing the transmission of prospectuses — and Section 5(b)(2) — governing sales of securities by means of prospectuses — is critical for understanding Rule 430's scope. Rule 430 allows the preliminary prospectus to be transmitted to investors in satisfaction of Section 5(b)(1), but it does not authorise sales, which require a final Section 10(a) prospectus under Section 5(b)(2). The complete sequence — preliminary prospectus under Rule 430 during the waiting period, pricing under Rule 430A at effectiveness, final pricing prospectus under Rule 424(b) — is a consistently examined concept across the Series 7, SIE, and Series 65 examinations.

The key points to retain are these. Rule 430 provides the legal basis for the preliminary prospectus — the red herring — by establishing that a pre-effective prospectus is deemed to satisfy Section 10 requirements for Section 5(b)(1) purposes, provided it contains substantially all required information except for specifically enumerated pricing-related omissions. The rule permits omission of the offering price, underwriting commissions, dealer discounts, proceeds, conversion rates, call prices, and other matters dependent on the offering price — but not other material information. A preliminary prospectus deemed compliant under Rule 430 is treated as part of the registration statement for Section 7 and expert consent purposes. Rule 430 applies during the waiting period between filing and effectiveness; it does not apply to automatically effective automatic shelf registration statements under Rule 462(e). The Rule 430 family — Rules 430, 430A, 430B, and 430C — together governs when prospectuses satisfy Section 10 at all stages of the offering process. Rule 430 was last amended November 21, 2011 and no amendments are pending as of June 2026.