SEC Resources for a Rule 506 Syndication: The Official Pages to Read
Most apartment syndications rely on Rule 506 of Regulation D. The rule is the legal exemption that lets a sponsor sell securities without registering them. The official SEC pages are the place to check what the rule says and what a sponsor must file. Many first-time sponsors and investors have never read them. This post lists the pages worth reading, what each one states on the points people ask about most, and what the pages leave to other sources.
We quote the SEC where the page is clear. This post is not legal advice, and the rule has conditions that depend on the offering. A securities attorney should review each offering.
The pages to read
| Source | What it is | What it says on the points that matter |
|---|---|---|
| eCFR: 17 CFR 230.506 | The official current text of Rule 506 | Paragraph (a) says offers and sales that meet paragraph (b) or (c) count as transactions not involving a public offering under Section 4(a)(2). Paragraph (d) covers the bad actor disqualifications and (e) covers older events that must be disclosed |
| eCFR: 17 CFR Part 230 | Regulation D, the full set of rules | The rules that apply to Rule 506, including the general conditions in Rules 501 and 502 |
| Cornell Law School: 17 CFR 230.506 | An unofficial copy of the same rule | Useful for reading, but check the eCFR text before you rely on it |
| SEC: Filing a Form D notice | The SEC's page on the Form D notice | A notice must be filed within 15 days after the first sale of securities. The first sale is the date the first investor becomes irrevocably contractually committed to invest. The SEC charges no fee for a Form D or an amendment |
| SEC: What Form D is | A small business guide to the Form D notice | Form D is a notice of an exempt offering, filed electronically through EDGAR |
| SEC: Rule 504 small entity compliance guide | The guide to a different exemption | Rule 504 has its own limit and its own conditions. Most apartment syndications use Rule 506, not Rule 504 |
The SEC's Form D instructions are a PDF on sec.gov, and the SEC small business section of the site lists the compliance guides. Use the eCFR text to confirm each rule before you rely on a guide.
What the rule says about who can invest
Under Rule 506(b), an offering may have no more than 35 non-accredited purchasers in any 90-day period, and each non-accredited purchaser must have enough financial knowledge to evaluate the investment. Under Rule 506(c), every purchaser must be an accredited investor, and the issuer must take reasonable steps to verify that. The rule lists verification methods such as reviewing IRS forms or getting written confirmation from a registered broker-dealer, an SEC-registered adviser, a licensed attorney or a CPA.
Our posts on Rule 506(b) vs 506(c) and accredited investor verification explain how those choices play out for a sponsor.
What the rule says about promotion
Rule 506(b) generally does not allow general solicitation, meaning advertising a deal to the public. Rule 506(c) allows it, but only when every purchaser is verified as accredited. Our post on what general solicitation means covers the line, and can followers invest under 506(b) covers the relationship test.
What the SEC pages do not cover
- State law. The SEC's Form D guidance says a company must also comply with the state securities laws where the offering is sold. A federal notice does not replace a state filing. Our post on blue sky notice filings covers that layer.
- The offering documents. The rule does not write the private placement memorandum, the operating agreement or the subscription agreement. Our posts on how to read a syndication PPM and the subscription agreement cover those documents.
- The sponsor's own record. The SEC pages describe the rules, not whether a sponsor is a good operator. Our guide to researching a sponsor on EDGAR and BrokerCheck covers the checks an investor can run.
How DoorRaise fits
A sponsor who uses a platform should still know the rules above, because the platform does not change the law. Read our Form D filing guide for what the notice contains and when it is due.
Sources
- eCFR: 17 CFR 230.506, exemption for limited offers and sales without regard to dollar amount
- eCFR: 17 CFR Part 230, Regulation D
- Cornell Law School: 17 CFR 230.506
- SEC: Filing a Form D notice
- SEC: What is Form D
- SEC: Rule 504 of Regulation D small entity compliance guide
- SEC: Form D instructions (PDF)
This article is general information, not legal, tax or investment advice. DoorRaise, Inc. is not a law firm, broker-dealer, investment adviser or funding portal, and DoorRaise does not represent the sponsor or the investor. Read the rule and the SEC guidance yourself, and have a securities attorney review each offering. Pages were read as of October 25, 2026 and may change.