November 9, 2026 · 6 min read
Regulation D vs Rule 144A: Key Differences Explained
Two SEC routes for selling securities without a public offering. Who sells, who can buy and what each means for an investor.
- Securities law
Reg D vs 144A comes down to who is selling. Regulation D (Reg D) lets a company sell its own new shares in private, mostly to wealthy buyers. Rule 144A lets the holders of securities resell them to large institutions. A startup raising a funding round uses Reg D. A company selling bonds through banks to big investors uses Rule 144A.
If you invest in a startup round, a private fund or an SPV, you most likely buy under Reg D. Rule 144A works in a market only big firms can enter. Either way, what you buy comes with limits. You cannot just sell it on a stock exchange.
$378B
Raised by companies under Rule 506(b) of Regulation D in 12 months, excluding funds
$1T
Raised by companies through Rule 144A and Regulation S deals in 2024
$100M
Securities an institution must own and invest to buy under Rule 144A
15 days
Deadline to file Form D after the first sale under Regulation D
Rule 144A vs Reg D: What Is the Difference?
The table compares the two on definition, who sells, who can buy, who uses each, legal and tax treatment, risk, liquidity and a typical example.
Regulation D governs how a company raises money privately. Rule 144A governs how institutions trade what was raised
As of November 2026 · 17 CFR 230.501–506, 230.144, 230.144A; SEC Release 33-9415 (2013); SEC OASB Staff Report FY2025. US rules.
How Regulation D Works for a Company Raising Money
Regulation D dates from March 8, 1982. It gives a company three ways to sell shares without a full SEC filing. The company itself must be the seller. A holder who wants to resell needs a different rule.
- Rule 506(b)No public advertising. Any number of accredited investors, plus up to 35 non-accredited buyers in 90 days who can judge the risks (Rule 506).
- Rule 506(c)The company may advertise, but every buyer must be accredited. It has to take reasonable steps to check. See Reg D 506(c).
- Rule 504Up to $10M in any 12 months, for companies that do not report to the SEC.
An accredited investor is a person worth more than $1 million without their home. Income above $200,000 a year, or $300,000 with a spouse, also counts. Banks, insurers and many larger firms qualify too (Rule 501). The company files a short notice, Form D, within 15 days of the first sale (Rule 503).
Buyers get restricted securities. They cannot resell them freely. The company must take care that buyers do not act as hidden resellers. One way is a printed warning, called a legend, on the share certificate (Rule 502).
How Rule 144A Works for Institutional Buyers
Rule 144A came later, on April 23, 1990. It lets anyone other than the issuer resell securities to a qualified institutional buyer (QIB). A QIB owns and invests at least $100 million in securities of companies it is not tied to. A dealer needs $10 million. A bank also needs $25 million of audited net worth (17 CFR 230.144A). The full test is on QIB.
Rule 144A is a resale rule, yet companies use it to raise money. In a “Rule 144A offering,” the company sells new bonds or shares to banks called initial purchasers. That first sale is private. The banks then resell to QIBs under Rule 144A. Since September 23, 2013, the offer may be made more widely, as long as only QIBs buy (SEC, 2013).
The securities cannot be of the same class as shares listed on a US exchange. If the issuer does not file reports with the SEC, a holder and a buyer can ask it for basic numbers.
Reg D vs 144A: How the Two Rules Fit Together
The two rules sit at different steps in the life of a bond or share. Reg D covers the first sale from the company. Rule 144A covers later resales to big buyers. Both leave the buyer with restricted securities under Rule 144 (17 CFR 230.144(a)(3)).
- Startup roundCompany sells to funds under Regulation D → buyers hold restricted shares → resale later under Rule 144 or in a private sale.
- Bond dealCompany sells to banks privately → banks resell to QIBs under Rule 144A → QIBs trade with each other.
- Private fundFund sells interests to investors under Regulation D → interests usually stay put until the fund sells its holdings.
Funds raise most of the money that flows through Reg D, the SEC staff says. Companies other than funds raised $378 billion under Rule 506(b) and $24 billion under Rule 506(c) in the 12 months to June 2025. Rule 144A and Regulation S deals reached about $1 trillion in 2024. Regulation S covers sales made outside the US.
Reg D vs Rule 144A Pros and Cons: A Verdict on Each
Regulation D
- For
- No cap on the amount under Rule 506. Open to accredited individuals. A short Form D replaces a full registration.
- Against
- Buyers receive restricted securities with no ready market. Disclosure can be thin. Only the issuer can use it.
Verdict: Reg D is how most private companies and funds raise money. It lets people with enough income or wealth take part. The trade-off is that your money is tied up until a sale or a listing.
Rule 144A
- For
- Large deals reach institutional buyers quickly. QIBs can trade among themselves with no holding period.
- Against
- Closed to individuals. Not available for securities of a listed class. Securities stay restricted outside the QIB market.
Verdict: Rule 144A suits large issuers and the big firms that buy from them. It creates a private market where large buyers trade with each other. A person meets it only through a fund.
Reg D is how a company raises private money. Rule 144A is where big firms trade what was sold in private. Individuals take part through Reg D.
Reg D vs 144A: What Each Means for You as an Investor
If you buy into a startup round, a fund or an SPV, the offering is most likely under Reg D. The subscription agreement asks you to confirm you are accredited. The issuer files a Form D. You get restricted securities, so plan to hold them for years.
Axevil sets up a separate Delaware SPV for each deal, managed by Axevil Capital, LLC. It works with investors who qualify under US rules and equivalent regimes. For how a private sale works as a contract, see private placement. For how Rule 144A relates to public resales, see Rule 144 vs Rule 144A.
Common Mistakes
- Thinking Regulation D covers resalesIt covers only the company’s own sale. Reselling needs another exemption.
- Reading accredited as QIBAn accredited person needs $1M net worth. A QIB needs $100M invested and is almost always an institution.
- Treating Form D as approvalForm D is a notice. The SEC does not review or approve the offering.
- Expecting 144A to mean publicRule 144A securities stay in a private market among institutions.
The Terms This Page Uses
- Regulation D
- SEC rules that let a company sell new securities privately without registering the offering.
- Rule 144A
- The SEC rule for reselling securities privately to qualified institutional buyers.
- Accredited investor
- A person or entity that meets the SEC’s income, wealth or status tests in Rule 501.
- Qualified institutional buyer
- An institution that owns and invests at least $100M in securities of unaffiliated issuers.
- Restricted securities
- Securities bought in a private deal that cannot be resold without registration or an exemption.
- Initial purchasers
- Banks that buy a new issue from a company and resell it to QIBs under Rule 144A.
- Form D
- A short notice filed with the SEC within 15 days of the first Regulation D sale.
- General solicitation
- Public advertising of an offering, allowed under Rule 506(c) and barred under Rule 506(b).
- Regulation S
- SEC rules for offerings made outside the US.
What People Ask About Regulation D and Rule 144A
Yes, in different deals or at different steps. A company may raise equity from funds under Regulation D and later sell bonds through banks that resell under Rule 144A.
Only if they are also a qualified institutional buyer. That takes at least $100M in securities owned and invested, so in practice it is an institution.
Yes. Both are restricted securities under Rule 144. A public resale needs Rule 144 or another exemption.
No. Form D is a notice for Regulation D offerings. A resale under Rule 144A has no Form D of its own.
It depends on the company and the buyers. Regulation D suits private companies raising equity from funds and individuals. Rule 144A suits larger issuers selling through banks to institutions.
Where Every Figure on This Page Comes From
Rules and figures were last checked on November 9, 2026. All rules described are US federal rules. The SEC staff report covers July 2024 to June 2025 for Regulation D and calendar 2024 for Rule 144A and Regulation S.
- 01Cornell LII · 17 CFR 230.506Current ruleRules 506(b) and 506(c): 35 purchasers in 90 days, sophistication, all-accredited and verification
- 02Cornell LII · 17 CFR 230.501Current ruleAccredited investor tests and the purchaser count
- 03Cornell LII · 17 CFR 230.502Current ruleNo general solicitation under 506(b), limits on resale
- 04Cornell LII · 17 CFR 230.503Current ruleForm D within 15 calendar days of the first sale
- 05Cornell LII · 17 CFR 230.144ACurrent ruleQIB thresholds, conditions of a Rule 144A resale, restricted status
- 06Cornell LII · 17 CFR 230.144Current ruleRegulation D and Rule 144A securities are restricted securities
- 07US Securities and Exchange Commission07.10.2013Release 33-9415: Regulation D adopted 03.08.1982, Rule 144A adopted 04.23.1990, offering structure, general solicitation from 09.23.2013
- 08SEC Office of the Advocate for Small Business Capital Formation07.2024–06.2025Staff Report FY2025: $378B under 506(b), $24B under 506(c), about $1T through Rule 144A and Regulation S
This page explains how a market works. It is not investment advice, not a recommendation of any security, strategy or company, and not an offer to sell or a solicitation to buy anything. Private companies may never list or be acquired, positions in them can be illiquid for years, and the entire amount invested can be lost. Figures are accurate as of the dates shown and change. Requirements for investor status, and the tax treatment of a private holding, differ by jurisdiction — the jurisdiction is named wherever this page discusses either. Prepared by the AXEVIL Capital research team.
What closed on the private market in the past two weeks
The rounds that priced, the tender offers that opened and the listings that filed — with the structure of each deal and the date on every figure. Written by the team that reads the paperwork.
Where to go from here
Securities lawWhat Is Regulation D? Definition, How It Works and ExamplesWhat is Regulation D? The SEC rules that let companies sell securities without registration. Rules 504, 506(b) and 506(c), limits and a worked example.
Securities lawWhat Is Rule 144A? Definition, How It Works and ExamplesRule 144A lets holders resell unregistered securities to large institutions called QIBs. The four conditions, how deals work and how it differs from Rule 144.
Securities lawWhat Is a Qualified Institutional Buyer (QIB)? Definition and ExamplesA QIB is an institution with at least $100M invested in securities. Who qualifies, how status is shown and how it differs from an accredited investor.