TL;DR: A Security Token Offering (STO) issues digital securities on-chain that represent regulated ownership or investment rights. Security token compliance also known as STO compliance require meeting local securities rules alongside good AML and KYC controls.
What is a Security Token Offering?
A Secure Token Offering (STO) is the distribution of company assets on the blockchain. These assets are tokenized, meaning they exist on the blockchain and act as a digital version of ownership. The digital tokens distributed in this event are thought to be securities by law. Therefore, they must stick to STO compliance rules and policies brought in by leading securities regulators, such as:
- The Securities and Exchange Commission (SEC, America)
- The Securities and Futures Commission (SFC, Hong Kong)
- Financial Conduct Authority (FCA, United Kingdom)
STOs are gaining traction fast as a way to do corporate fundraising. They are starting to be used instead of Initial Public Offerings (IPOs). An STO must comply with the security legislation in the location where the digital security token is being transacted. Such STO compliance regulations often include disclosure, transparency, and user protection.
What are Digital Securities?
Digital securities act as ownership rights on the blockchain, mirroring traditional instruments such as company equity in a digitally held format. Issuers can also tokenise a wide range of assets through a security token offering. From real estate to art, they can create on-chain tokens that reflect the underlying ownership interest. In short, trading security token offerings that represent a traditional financial asset, such as tokenized company stock, offers many perks for users and traders:
- Increased liquidity
- Reduced costs of trading
- Fractional ownership
- 24-hour trading
Digitizing securities can widen access to global capital markets by lowering minimum investment sizes and simplifying distribution. Securities rules still push many STOs to focus on institutional or qualified participants. This limits direct retail participation in most regions. Moreover, retail engagement in investing has recovered strongly since the 2007/2008 financial crisis, with more individuals taking an active role in managing their finances.
So, as digital securities mature, they can go beyond market access for existing investors and lower barriers to entry. Fractional ownership and faster settlement make this possible. This supports wider participation, providing protections and STO compliance controls. It remains in line to local regulatory rules.
Digital asset markets enable near 24/7 trading by using smart controls that automate verification and settlement without relying on a single go-between. This design keeps markets running more continuously than traditional exchanges, where fixed trading hours and slower post-trade processes limit activity.
Centralized exchanges (CEXs), such as Coinbase, offer around-the-clock access. Trades occur through the platform acting as the middle-man rather than an on-chain smart contract. As 24/7 tradition becomes familiar to market participants, traditional venues have looked at extended trading models. This may speed up the move toward more digitized and tokenized market structure over time.
STO vs ICO
An STO also known as security token offerings are an initiative for raising capital or publicly distributing financial instruments on the blockchain, such as company equity. Initial Coin Offerings (ICOs) raise funds through the selling of utility tokens, which grant access to a business’s platform or services. The utility token acts as the engine behind a company’s project.
The Financial Action Task Force (FATF) moderates ICOs as any other Virtual Asset Service Provider (VASP). This means that all ICOs must stick to the same AML and KYC rules as Recommendation 15. In the UK, the FCA has not set clear ICO rules, so it often reviews offerings on a case-by-case basis.
But we may ask you to explain why you think your activities are not in scope.
The FCA flow chart explains how it treats crypto firms that do not arrange payment services, operate payment machines, or provide custody. The UK then aims to clarify crypto rules and related legislation, reducing ambiguity and supporting further growth across the UK sector.
Security Token Offering Rules and Regulations
Tokenized Real World Assets and digital securities still fall under traditional securities laws. In the United States, the SEC regulates these markets by setting and enforcing investor-protection rules, and tokenized RWA exchanges must obtain the right licence from the same federal regulator.
STOs and digital securities must stick to the same traditional securities laws as regular securities. These include:
- Registration: Issuers of digital securities must still register their equity tokens with the correct regulatory body, the SEC in America, for example.
- Disclosure: All needed information about the securities and issuers must be provided for investor transparency.
- Reporting: Company reporting obligations must be met, such as financial statements, investor relations updates and related business developments.
Issuers and intermediaries must then stick to a suite of AML and KYC regulations. This involves the thorough identification and vetting, known as Customer Due Diligence (CDD), of users who wish to trade or invest in securities. For more information about the CDD process, What is Customer Due Diligence?
Broker-dealers must meet the same core guidelines and secure the right licence before they can work. Then, they apply stricter controls across onboarding, transaction recordkeeping, communications, and conduct standards to protect investors and keep market integrity.
There is also a matter of verifying that the individual has the right to purchase of invest in the securities, known as accredited investor verification. Such an example would be private placements (non-public offerings, typically to persons or groups that provide a company with more than just financial funding).
Case Study: HKSAR Government’s Third Digital Green Bonds Offering
The Hong Kong Special Administrative Region (HKSAR) Government wanted to scale a regulated security token offering issuance. They wanted to do this while keeping investor protections and market accessibility consistent with traditional bond structure. A big challenge was presenting tokenised settlement efficiencies without breaking down liquidity or excluding participants who rely on already built rails.
Digitally native issuance with regulated settlement and standards
As a result, the HKSAR Government priced its third digital green bond issuance on 10 November 2025, using the HKMA’s CMU for clearing and settlement and HSBC Orion as the digital assets platform. The structure retained traditional market access options while issuing in a digitally native format and integrating green bond disclosures with the digital assets platform.
Outcomes
HK$10 billion record tokenised issuance size across four currency tranches.
Over HK$130 billion in total subscriptions over four tranches, the most digital bond issuance to date.
T+1 settlement cycle, with HKD and RMB tranches offering settlement via tokenised central bank money (e-HKD and e-CNY).
Blockchain-Specific Securities Regulations
Due to digital securities being listed, transferred, and stored via a Distributed Ledger Technology (DLT), the protocols that facilitate digital securities trading, such as INX, must receive smart contract audits for security.
Teams run code audits to identify and fix vulnerabilities before attackers can exploit them to drain treasuries, liquidity pools, or other on-chain funds. The tokenization platform then hardens day-to-day operations with secure controls, monitoring, and disciplined change management to keep issuance and trading resilient.
Exchanges run rigorous Identity Verification (IDV) to confirm each user’s identity and block impersonation, fraud, and other high-risk activity before onboarding. These are the same typical checks that most regulated Centralized Exchanges (CEXs) conduct when a new user signs up.
A typical AML and KYC flow would consist of the following steps:
- Document verification
- Biometric (selfie) verification
- Address verification (where applicable)
- Background CDD checks
- Continuous monitoring
After assessing the customer’s risk level, the platform screens and monitors their transactions as needed, quickly detecting, investigating, and resolving suspicious activity. For more information about crypto compliance, read How KYC Crypto Regulations Safeguard the Industry.
Key Takeaways
Security Token Offerings (STOs) are securities first, blockchain second.
RWA tokenization does not reduce regulation, it expands the compliance map.
STO compliance is built on two pillars: securities governance and financial crime controls.
Digital securities can unlock market efficiency without sacrificing safeguards.
Blockchain-specific risk becomes regulatory risk in tokenised markets.
ComplyCube’s Security Token Offering (STO) Compliance Solutions
ComplyCube delivers a comprehensive suite of AML and KYC solutions used by organisations across multiple industries worldwide. In the blockchain and trading sectors, they have helped companies expand STO compliance to 250+ regions compliantly while onboarding new customers in under 30 seconds.
Such a capacity to sign new customers up quickly is fundamental in the digital assets space and has been a growth catalyst for many firms around the world. However, their AML solutions go beyond client acquisition strategies.
The industry leader supplies a range of AML services, such as:
- Adverse media checks
- Sanctions and PEP screening (Politically Exposed Person screening)
- Watchlist Screening
- Transaction screening and monitoring (available via a partner’s API solution)
ComplyCube delivers these AML controls 24/7, actively screening and monitoring to detect, flag, and stop malicious activity in real time.
Reach Out to an STO Compliance Expert Today
If your STO, crypto, or fintech platform requires an optimized Identity Verification, Know Your Customer, or Anti-Money Laundering strategy, reach out to a ComplyCube specialist today to learn how they can help.
Frequently Asked Questions
What is a Security Token Offering (STO) and why is it regulated?
A Security Token Offering (STO) is the spreading of tokenised company assets on the blockchain, where the tokens represent ownership and are considered securities by law. They are treated as securities, STOs must follow local securities legislation in the jurisdictions where the token is transacted, including disclosure, transparency, and investor protection requirements.
What are digital securities and what benefits do they offer for investors and traders?
Digital securities are virtual representations of ownership stored on the blockchain that replicate traditional securities such as company equity. The blog highlights benefits including increased liquidity, reduced trading costs, fractional ownership, and near 24/7 trading access, while still requiring protections and STO compliance controls aligned to local regulatory rules.
What is the difference between an STO and an ICO?
An STO raises capital by spreading tokenised financial instruments such as equity that are treated as securities. An Initial Coin Offering (ICO) sells utility tokens that provide access to a platform or service.
What does STO compliance require for AML and KYC?
STO compliance blends securities obligations (such as registration, disclosure, and reporting) with AML and KYC controls that verify and monitor participants. The standard flow includes document verification, biometric (selfie) verification, address verification where applicable, background Customer Due Diligence (CDD) checks, sanctions and Politically Exposed Person (PEP) screening, and continuous monitoring to identify and remediate suspicious behaviour.
How does ComplyCube support security token compliance for STOs and digital securities?
ComplyCube supports security token compliance and STO compliance through a unified suite of AML and KYC capabilities, including Identity Verification (IDV), CDD, sanctions and PEP screening, watchlist screening, adverse media checks, and ongoing monitoring support.
