Reg D 506(c) vs. Reg A+ for Security Token Offerings

Over 1,200 Form D filings cited digital assets or blockchain technology between 2018 and Q1 2026 — within a total Reg D market that raised $2.15 trillion in 2024 according to SEC EDGAR data — compared to just 89 qualified Reg A+ offerings involving tokenized securities during the same period. STO issuance grew from $5.6 billion in 2024 to $6.66 billion in 2025, with notable Reg D offerings including BlackRock’s BUIDL fund ($1.87 billion AUM via Securitize) and notable Reg A+ offerings including Exodus Movement’s $75 million tokenized stock (the first U.S.-registered company to tokenize common stock) and INX Limited’s approximately $84 million Reg A+ IPO (the first SEC-registered IPO of a digital security). This 13:1 ratio reflects the fundamental tradeoff between the two dominant SEC exemptions for security token issuance — Reg D 506(c) offers speed and cost efficiency for offerings limited to verified accredited investors, while Reg A+ unlocks retail investor access and immediate secondary market tradability at approximately double the compliance cost and timeline.

Side-by-Side Comparison

Investor Access Analysis

Reg D 506(c): The Accredited-Only Pool

The accredited investor limitation of Reg D 506(c) restricts offerings to approximately 24.3 million U.S. households (18.5% of all households), representing an estimated $73.3 trillion in investable assets. While the accredited pool is large in aggregate, the subset of accredited investors actively engaged in digital asset investments is substantially smaller — estimated at 2.8 million individuals based on survey data and platform onboarding statistics.

Reg D 506(c) mandates “reasonable steps” to verify accredited investor status, as described in accredited investor verification methods. This requirement adds friction to the investor onboarding process but provides legal certainty. Verification typically costs $30-75 per investor through third-party services and adds 2-5 business days to the onboarding timeline.

The verification mandate distinguishes 506(c) from 506(b), which permits self-certification but prohibits general solicitation. For token offerings that rely on digital marketing, social media, and public promotion — which is to say nearly all of them — 506(c) is the only viable Reg D option because these promotional activities constitute general solicitation.

Reg A+ Tier 2: Retail Access

Reg A+ Tier 2 eliminates the accreditation requirement, opening the offering to all U.S. investors. Non-accredited investors face per-offering investment limits of the greater of 10% of annual income or 10% of net worth, but these limits are self-certified and not independently verified by the issuer.

For token projects where broad distribution is essential — either for network effects, governance participation, protocol decentralization, or community building — Reg A+ provides unique access to the retail market that 506(c) cannot offer. Republic has demonstrated this model successfully, processing over $800 million in Reg A+ token offerings with average investor checks below $5,000.

The total addressable investor pool for Reg A+ offerings is approximately 130 million U.S. adults — more than 5x the accredited investor pool — though the practical conversion rate from awareness to investment is typically 0.5-2% for digital asset offerings.

SEC Review and Qualification Process

Reg D 506(c): File and Sell

Reg D 506(c) requires no SEC review or approval. The issuer files Form D with the SEC within 15 days of the first sale of securities as a notice filing. The filing is ministerial — the SEC staff does not review the offering materials, approve the token structure, or evaluate the issuer’s disclosures. This means an issuer can begin selling tokens as soon as its legal documentation, smart contracts, and investor verification infrastructure are ready.

The practical timeline from legal engagement to first token sale under Reg D 506(c) ranges from 2-8 weeks, with the primary variables being:

• Smart contract development and audit (2-4 weeks)
• Legal documentation preparation (2-3 weeks, often parallel)
• Platform integration with transfer agent and compliance infrastructure (1-2 weeks)
• Investor pipeline development (ongoing)

Reg A+ Tier 2: Full SEC Qualification

Reg A+ Tier 2 requires the issuer to file Form 1-A with the SEC and receive qualification before any sales can occur. The Form 1-A includes an offering circular (similar to a prospectus), audited financial statements prepared in accordance with GAAP, and detailed disclosure about the issuer, management, risk factors, use of proceeds, and the token’s technical architecture.

The SEC staff reviews the filing and issues comment letters identifying deficiencies, to which the issuer must respond. The review process typically involves 2-4 rounds of comments and takes 3-9 months from initial filing to qualification. Token offerings tend toward the longer end of this range because SEC staff scrutinizes blockchain-specific disclosures, smart contract functionality, and token economics more carefully.

An issuer may “test the waters” before qualification by soliciting non-binding indications of interest from potential investors, subject to specific disclosure requirements. This provision allows Reg A+ issuers to gauge demand before committing the full $500K-$2M in qualification costs.

Secondary Market Tradability

The most significant operational difference between the two exemptions is secondary market tradability, which directly impacts investor liquidity and token valuation:

Reg D Tokens: Restricted Securities

Reg D tokens are “restricted securities” under Rule 144, subject to minimum holding periods before resale is permitted. For non-reporting issuers (which describes most security token issuers), the Rule 144 holding period is one year; for reporting issuers, six months. During the holding period, tokens cannot be resold on ATS platforms or through any other secondary market channel.

After the holding period expires, Rule 144 resales are subject to additional conditions: current public information about the issuer must be available, volume limitations restrict the number of tokens that can be sold in any 90-day period, and sales must be conducted through ordinary brokerage transactions. These restrictions create ongoing friction for secondary market liquidity.

The practical impact is significant: ATS market data shows that Reg D security tokens trade with average bid-ask spreads of 2.1%, compared to 0.8% for Reg A+ tokens — a 2.6x liquidity premium attributable primarily to the smaller eligible buyer pool and holding period constraints.

Reg A+ Tokens: Freely Tradable

Reg A+ Tier 2 tokens are not restricted securities. They can be traded on ATS platforms like tZERO, Securitize Markets, and INX immediately upon issuance. Any investor — accredited or non-accredited — can purchase Reg A+ tokens on the secondary market without investment limits (the 10% investment limits apply only to the primary offering).

This immediate tradability represents Reg A+’s most compelling advantage for security token issuers. Day-one liquidity can be marketed to prospective investors during the offering period, potentially increasing demand and supporting a higher token valuation. INX’s own Reg A+ offering demonstrated this dynamic, with its token achieving immediate secondary market trading upon ATS listing.

Ongoing Compliance Burden

Reg D 506(c): Minimal Ongoing Obligations

Reg D 506(c) imposes minimal ongoing obligations. There is no periodic reporting requirement to the SEC. The issuer must file Form D amendments annually if the offering continues and must maintain records of accredited investor verification. State Blue Sky notice filings may be required depending on the jurisdictions where tokens are sold.

Annual ongoing compliance costs for a Reg D security token issuer typically range from $25,000-$75,000, covering transfer agent fees, ATS listing fees, legal counsel, and state filing fees.

Reg A+ Tier 2: Public Reporting Obligations

Reg A+ Tier 2 requires ongoing periodic reporting that mirrors public company obligations at a reduced scale:

• Annual Report (Form 1-K) — Filed within 120 days of fiscal year-end, including audited financial statements and updated disclosure.
• Semi-Annual Report (Form 1-SA) — Filed within 90 days of the semi-annual period, including unaudited financial statements.
• Current Event Reports (Form 1-U) — Filed promptly upon the occurrence of specified events, including material business developments, changes in management, and bankruptcy.
• Exit Report (Form 1-Z) — Filed when the issuer wishes to suspend reporting obligations.

These ongoing obligations create permanent compliance costs of $50,000-$150,000 annually, requiring the issuer to maintain audit-ready financial statements, engage independent auditors, and retain experienced securities counsel.

Cost-Benefit Analysis by Offering Size

Hybrid Approaches

Sophisticated issuers increasingly combine both exemptions:

Sequential Reg D → Reg A+. Launch with a Reg D 506(c) offering to raise initial capital from accredited investors quickly, then file a Reg A+ qualification to open the offering to retail investors and create immediate secondary market tradability. This approach captures the speed advantage of Reg D while eventually unlocking the liquidity benefits of Reg A+.

Reg D + Reg S. Combine a domestic Reg D 506(c) offering with an offshore Reg S offering to access both U.S. accredited investors and international markets simultaneously. The integration doctrine analysis is critical in this structure to ensure the two offerings are not integrated into a single non-compliant offering.

Reg A+ + Reg S. Combine a domestic Reg A+ offering with an offshore Reg S offering for maximum global reach across both retail and institutional investor pools.

Strategic Decision Framework

Choose Reg D 506(c) when:

• Capital can be raised from accredited investors alone
• Speed is a priority (2-8 weeks vs. 3-9 months)
• The project prefers minimal ongoing SEC compliance burden
• Budget constraints favor the lower-cost exemption ($250K-$1M vs. $500K-$2M+)
• The offering exceeds $75 million (Reg A+ cap)
• The SAFT structure is used for pre-launch fundraising

Choose Reg A+ Tier 2 when:

• Retail investor access is essential for the project’s network effects
• Immediate secondary market tradability is a priority for investor attraction
• The project benefits from SEC qualification as a credibility signal with institutional partners
• The offering is $75 million or less
• Broad token holder distribution supports network decentralization goals
• The issuer plans to eventually pursue full SEC registration or listing on a national exchange

For implementation guidance under either exemption, see our detailed analyses of Reg D 506(c) and Reg A+. For Form D filing procedures, see our Form D filing guide. For platform-specific implementation, see our entity profiles of Securitize, tZERO, and Republic. For the offering circular preparation process specific to Reg A+, see our offering circular guide.

Real-World Issuer Examples

Several completed offerings illustrate how the Reg D vs. Reg A+ choice plays out in practice:

INX Limited (Reg A+). INX completed a $117 million Reg A+ security token offering in 2021 — the first SEC-qualified security token IPO. The qualification process took approximately 18 months (longer than typical due to the novel nature of the offering), and total legal and compliance costs exceeded $3 million. However, the Reg A+ structure allowed INX to offer tokens to retail investors and achieve immediate secondary market trading on its own ATS platform, establishing a critical user base for its exchange business.

Securitize / BlackRock BUIDL Fund (Reg D 506(c)). The BUIDL tokenized Treasury fund, launched in 2024, was structured under Reg D 506(c) with a $5 million minimum investment, targeting institutional accredited investors. The Reg D structure enabled BlackRock to launch rapidly without SEC review, and the accredited investor limitation aligned with the fund’s institutional focus. The fund attracted over $500 million in assets within months, demonstrating that Reg D’s investor restrictions are not a barrier when the target market is institutional.

Republic (Reg A+). Republic has processed over $800 million in Reg A+ token offerings across multiple issuers, with average investment sizes below $5,000. Republic’s platform demonstrates the retail access advantage of Reg A+ — each offering attracts thousands of small investors who would be excluded under Reg D’s accredited investor requirements.

These examples confirm the core strategic framework: Reg D 506(c) is optimal for institutional capital raised quickly and efficiently, while Reg A+ Tier 2 serves issuers who need broad investor participation and immediate secondary market tradability.

For the SEC’s official guidance on Reg D and Reg A+, see SEC Regulation D Rules and SEC Regulation A+ Overview.