506(b) vs 506(c): What the Difference Actually Means

Every Form D filing falls under one of two rules: 506(b) or 506(c). Both are exemptions under Regulation D of the Securities Act of 1933. Both require a Form D filed with the SEC within 15 days of the first sale. Both let companies raise unlimited capital from accredited investors without registering the offering with the SEC.

The difference is what happens between the company and the investors it reaches. One rule requires a pre-existing relationship. The other allows open advertising. That distinction changes who can invest, what the company can say publicly during the raise, and what the filing signals to anyone reading it after the fact.

Rule 506(b): The private network raise

Rule 506(b) prohibits general solicitation. The company cannot advertise the offering publicly, post about it on social media, or pitch at public investor events in a way that constitutes soliciting investment. All investors must have a pre-existing substantive relationship with the company or its principals before the raise begins.

In exchange, 506(b) allows up to 35 non-accredited investors. Every other investor must be accredited (net worth over $1 million excluding primary residence, or income over $200,000 for two consecutive years). The non-accredited investor carve-out is rarely used in institutional rounds, but it exists and matters for community rounds, friends-and-family, and some SAFE structures.

Most venture capital raises use 506(b). Seed rounds from angels, Series A from institutional funds, growth rounds from crossover investors: these are all typically 506(b). The mechanics of venture capital already satisfy the rule. The fund has existing LP relationships. The startup already knows the investors from warm intros, conference meetings, or prior conversations. No public solicitation necessary.

When you see a 506(b) filing, you are looking at a company that raised through its network. That does not mean the company is obscure. It means the capital formation process was private.

Rule 506(c): The advertised raise

Rule 506(c) was created by the JOBS Act of 2012 and became effective in September 2013. It allows general solicitation: the issuer can advertise the offering publicly, post on LinkedIn, run ads, present at public pitch events, and reach investors it has no prior relationship with.

The trade-off is strict. Every investor in a 506(c) offering must be verified accredited, not just self- certified. Verification requires documentation: tax returns, W-2s, brokerage statements, or a letter from a licensed attorney, CPA, or registered broker-dealer confirming accredited status. Self-certification alone does not satisfy 506(c).

506(c) is common in several specific contexts. Real estate syndicators advertising on platforms like CrowdStreet or RealtyMogul use it. Hedge fund managers who market to a broader pool of accredited investors use it. Special purpose vehicles (SPVs) that advertise a specific deal to a wide investor list use it. Some revenue-based financing vehicles and private credit funds use it.

Product companies backed by venture capital rarely use 506(c). The verification overhead is high and the benefits of public solicitation are low when you already have warm introductions to the funds you want.

What this means for founders

The choice of exemption is a legal decision, not a branding one. It has to be made before the raise begins. If any investor is solicited through a public channel, the entire offering defaults to 506(c) and all investors must be verified accredited.

For most founders raising institutional venture capital: file under 506(b). Your investors are warm. You are not advertising. The non-accredited carve-out gives you flexibility if an early supporter is not technically accredited. Do not complicate a standard raise with 506(c) requirements.

For founders who want to advertise the raise publicly: plan for 506(c) from the start. Do not mix solicitation modes. Build the verification workflow before you start outreach. Use a third-party service (VerifyInvestor, Parallel Markets, or similar) to collect accredited investor documentation at scale. Trying to retrofit verification after the fact is expensive and legally fragile.

One practical constraint: announcing a funding round publicly while the offering is still open is not automatically solicitation under 506(b), but it is a grey area that securities counsel should review. Post-close announcements are generally fine. Mid-raise press coverage requires care.

What this means for investors

A 506(b) filing means the company raised from people it already knew. Institutional venture funds, angels with prior relationships, follow-on investors from a previous round. The capital formation was closed. This is the default mode for product companies building for a defined market.

A 506(c) filing means the company advertised the deal. That is not a red flag by itself. But it does tell you something about the investor profile. The investors came in through marketing channels, not warm introductions. They were verified accredited, but they were not hand-selected through a fund's network.

For a real estate fund or a hedge fund, 506(c) is normal and expected. For a seed-stage SaaS company, 506(c) is unusual. It warrants a question: why was public solicitation necessary? Was the founder unable to raise through their network? Is the deal structured unusually? Sometimes the answer is benign (the founder is early in their career, lacks VC connections, and used a crowdfunding-adjacent platform). But the question is worth asking.

506(b) filings from institutional funds (Andreessen Horowitz, Sequoia, Kleiner Perkins, and similar) are highly reliable signals of quality. The fund's name appears in the investor section of the Form D and the exemption type confirms the raise was private and relationship-driven.

What this means for sales reps and prospectors

If you are building a prospect list from Form D filings, the exemption type is a first-pass filter.

506(b) filings are predominantly operating companies: startups with a product, a team, and a market. They raised from venture funds or angels. They have a SaaS stack to build, people to hire, and tools to evaluate. If you sell B2B software, marketing services, hiring tools, or anything that a growing startup buys in the first 90 days after a round, the 506(b) list is your target.

506(c) filings are often fund vehicles, not product companies. A real estate fund raising $50 million under 506(c) is not buying your HR software. A hedge fund structured as an LP vehicle has no dev team to sell to. Filtering these out early saves hours of dead prospecting.

The practical filter for product company outreach: start with 506(b), add an amount filter ($500K to $15M depending on your deal size), and apply an industry code filter. What remains is almost entirely operating companies with fresh capital and an open buying window.

One exception worth noting: some 506(c) filings are from SPVs (special purpose vehicles) built around a single operating company investment. These are fund structures but the underlying company is a real product startup. If your tool is aimed at investors, SPV managers, or fund administrators, the 506(c) list has value for you.

How to read it on a Form D

On the raw EDGAR filing, the exemption type appears in Item 6: Federal Exemption(s) and Exclusion(s) Claimed. The field will read either "Rule 506(b)" or "Rule 506(c)" as a checkbox selection. There is no ambiguity in the filing itself: the issuer must choose one.

To find a filing on EDGAR: go to efts.sec.gov/LATEST/search-index?q=%22form+D%22 or use the full-text search at efts.sec.gov. Filter by form type "D" and search by company name or CIK. The filing will be a structured XML document. Look for the field labeled federalExemptionsExclusions and the value 06b or 06c in the machine-readable version.

FlareSight parses this field from every filing and labels each company in the database as 506(b) or 506(c). The filter is available on the company search page, so you can scope your list to one exemption type without downloading or parsing any XML.