Rule 506(b) vs. Section 4(a)(2): Which Private Placement Exemption?
Section 4(a)(2) of the Securities Act exempts "transactions by an issuer not involving any public offering," and whether a raise fits is judged on its facts, mainly whether every offeree can "fend for themselves." Rule 506(b) is the SEC's safe harbor under Section 4(a)(2): meet its written conditions and the offering is deemed private. Most apartment sponsors use Rule 506 rather than relying on Section 4(a)(2) alone, chiefly because a Rule 506 offering is a covered security, so states cannot require it to be registered.
This guide explains where 4(a)(2) comes from, compares it with 506(b) in one table, and covers the narrow cases where a sponsor might rely on the statute directly. For the two Rule 506 options, see 506(b) vs. 506(c); for Regulation D as a whole, see what is Regulation D. Rules are as of October 2026.
What is Section 4(a)(2)?
Section 5 of the Securities Act of 1933 requires a registration statement before securities are offered or sold. Section 4(a)(2) exempts "transactions by an issuer not involving any public offering." The statute does not define a public offering.
The leading case is SEC v. Ralston Purina Co., decided by the Supreme Court on June 8, 1953. The company sold stock to hundreds of employees and argued it was a private offering. The Court disagreed. It held that "an offering to those who are shown to be able to fend for themselves is a transaction 'not involving any public offering,'" that the focus "should be on the need of the offerees for the protections afforded by registration," and that the issuer claiming the exemption carries the burden of proof. The employees had not been shown to have "access to the kind of information which registration would disclose."
Courts since then weigh factors such as the number and sophistication of offerees, their access to information, how the offering was made and whether the securities could be resold. Because the analysis looks at offerees, not only buyers, one unsuitable offer can put the exemption at risk.
Why is Rule 506(b) called a safe harbor?
Rule 506(a) says offers and sales that satisfy Rule 506(b) or 506(c) "shall be deemed to be transactions not involving any public offering within the meaning of section 4(a)(2)." Instead of arguing facts after the fact, the sponsor follows written conditions:
- No general solicitation or advertising (Rule 502(c)).
- Any number of accredited investors, and no more than 35 non-accredited purchasers in any 90-calendar-day period, each of whom (alone or with a purchaser representative) has enough knowledge and experience to evaluate the investment.
- If any non-accredited purchaser buys, the disclosure in Rule 502(b), including financial statements, must be given to them. See Rule 502(b) disclosure.
- Restrictions on resale, with reasonable care that buyers are not underwriters (Rule 502(d)).
- No bad actor disqualification under Rule 506(d).
- A Form D notice filed with the SEC.
The SEC's Office of Small Business Policy summarizes both in its overview of capital raising exemptions. For Section 4(a)(2) it lists no offering limit, no general solicitation, no issuer requirements, investors limited to "transactions by an issuer not involving any public offering," no SEC filing, restricted securities and no preemption of state registration. For Rule 506(b) it lists bad actor disqualifications, unlimited accredited investors, up to 35 sophisticated non-accredited investors in 90 days, a Form D filed with the SEC, restricted securities and preemption of state registration.
How do 506(b) and 4(a)(2) compare?
| Topic | Section 4(a)(2) alone | Rule 506(b) |
|---|---|---|
| Source | The statute, interpreted by courts | SEC rule; a safe harbor under 4(a)(2) |
| Test | Facts and circumstances: can every offeree fend for themselves and get the information registration would give? | Written conditions in Rules 501, 502 and 506(b) |
| General solicitation | Not allowed | Not allowed |
| Investor limits | None stated; sophistication and access of each offeree | Unlimited accredited; up to 35 non-accredited purchasers in 90 days, each sophisticated |
| Disclosure | Enough that offerees have access to registration-type information | Rule 502(b) package if any non-accredited purchaser buys |
| Form D | Not required | Required within 15 days after the first sale |
| Bad actor rule | Rule 506(d) does not apply | Applies to the issuer, its managers, 20% owners, promoters and paid solicitors |
| State law | Not a covered security for a non-reporting issuer: each state's own registration or exemption rules apply | Covered security: states may require only a notice filing, fee and consent to service, and keep anti-fraud power |
| Resale | Restricted securities | Restricted securities |
| Certainty | Low: proved after the fact | High, if every condition is met |
The state law row is usually decisive. Section 18(b)(4)(F) of the Securities Act makes a security a "covered security" when it is sold under SEC rules issued under Section 4(a)(2), which is Rule 506. Section 18(b)(4)(A) covers 4(a)(2) sales only by issuers that file reports with the SEC, which a new apartment LLC does not. Without coverage, the sponsor must find an exemption in each investor's state, under that state's own rules. With Rule 506, the sponsor files notices under blue sky notice filing rules instead.
When might a sponsor rely on Section 4(a)(2) alone?
Rarely in an apartment syndication, but it happens:
- A small group of insiders. A few co-sponsors with deep knowledge of the deal, who negotiated its terms, may be able to rely on the statute, and some issuers also rely on it as a backup when the facts clearly support it.
- Missed Form D. Rule 506(b)(1) makes Rules 501 and 502 conditions of the exemption, not the Form D rule (Rule 503), so a late Form D does not by itself end the exemption. Rule 507 does deny Rule 506 to an issuer that a court has enjoined for failing to file. Pointing to Section 4(a)(2) as a second basis does not cure missed state notice filings.
- A bad actor issue. A sponsor disqualified under Rule 506(d) cannot use Rule 506, and turning to 4(a)(2) instead loses state preemption and adds the same scrutiny the bad actor rule was meant to give.
A sponsor who wants to market a deal publicly cannot use either one; that is Rule 506(c), which needs every buyer to be a verified accredited investor.
What are the risks of relying on 4(a)(2)?
- Burden of proof. Ralston Purina puts it on the issuer. A dispute years later is argued with whatever records exist.
- State registration. Each state where an investor lives may require registration or its own exemption, with its own conditions and fees.
- Rescission. If the exemption fails, the sale violated Section 5, and Section 12(a)(1) of the Securities Act makes the seller liable to the buyer, who can generally recover what they paid with interest. That claim tends to arrive at the worst time, such as after a loss.
- Integration. Offerings close in time may be looked at together; see integration under Rule 152.
A worked comparison (hypothetical, for illustration only). A sponsor raises $2,400,000 from 24 investors in six states: 22 accredited and 2 sophisticated non-accredited people who know the sponsor well.
| Step | Under Rule 506(b) | Under Section 4(a)(2) alone |
|---|---|---|
| Federal filing | Form D within 15 days of the first sale | None |
| States | Six notice filings and fees under each state's rules | Find and meet an exemption in each of six states, or register |
| Non-accredited buyers | 2 of the 35 allowed, with the Rule 502(b) disclosure | Must show both could fend for themselves and had access to registration-type information |
| Bad actor check | Required for covered persons | Not required by Rule 506(d) |
| Record if challenged | Proof of each written condition | Proof of every offeree's sophistication and access |
The 506(b) path has more paperwork up front and far less uncertainty later.
How DoorRaise fits in
DoorRaise helps sponsors raise equity for apartment buildings with 5 or more units from their friends and followers under Rule 506(c) by default or Rule 506(b), never under Section 4(a)(2) alone, and takes verified accredited investors only. It prepares the standard offering documents, forms the deal's LLC, files Form D and the state notices, and runs the bad actor questionnaire for covered persons; see filings. Investors fund by wire into escrow at Enterprise Bank & Trust, an independent bank. Fees are $1,500 to set up (non-refundable), $5,000 at closing (only if the deal closes) and $3,500 a year.
Raise your apartment deal from the people who already follow you.
DoorRaise is built for apartment buildings with 5 or more units: one link for the deal, escrow until closing and a standard fee card.
Sponsors can start a deal when the property is under contract.
FAQ
What is the difference between 506(b) and 4(a)(2)?
Section 4(a)(2) is the statute's private offering exemption, judged on the facts. Rule 506(b) is a safe harbor under it with written conditions; it requires a Form D, applies the bad actor rule and preempts state registration.
What is the difference between Regulation D and 4(a)(2)?
Regulation D is a set of SEC rules. Rule 506 is a safe harbor under Section 4(a)(2), while Rule 504 is an exemption the SEC adopted under Section 3(b). Section 4(a)(2) itself is the underlying statute.
What are the requirements for a 4(a)(2) private placement?
The statute says only that the transaction must not involve any public offering. Courts look at whether offerees can fend for themselves, their access to information, how many there are, how the offering was made and whether the securities stay restricted.
What is the private placement exemption in the Securities Act of 1933?
Section 4(a)(2), for "transactions by an issuer not involving any public offering." Rule 506 of Regulation D is the SEC's safe harbor for meeting it.
Does a 4(a)(2) offering need a Form D?
No. Form D is required for offerings relying on Regulation D or Section 4(a)(5), not for Section 4(a)(2) alone. But states may then require registration or their own exemption.
Sources
- 15 U.S.C. 77d, exempted transactions (Cornell LII)
- SEC v. Ralston Purina Co., 346 U.S. 119 (1953) (Cornell LII)
- 17 CFR 230.506 (Cornell LII)
- 15 U.S.C. 77r, covered securities and state notice filings (Cornell LII)
- SEC Office of Small Business Policy: Overview of capital raising exemptions (2024)
- SEC: Form D and its general instructions
This article is general information as of October 2026, not legal advice. The choice of exemption turns on your facts, so confirm it with your own securities attorney. Every investment can lose money. DoorRaise is not a law firm, broker-dealer, investment adviser or funding portal.