Let the Chain Become the Official Ledger: SEC Rewrites 50-Year-Old Rules as Tokenized Securities Enter the Ownership System

On September 1, the SEC proposed the largest overhaul of transfer-agent rules in nearly half a century, for the first time allowing blockchain to serve as a company’s official shareholder register. At the same time, the CLARITY Act faces a 60-vote cloture showdown on September 15. Legislation and the administrative track are now racing to decide who controls the ownership records of an on-chain Wall Street.

The SEC Transfer-Agent Rewrite: Blockchain Becomes the Official Shareholder Register

On September 1, the U.S. Securities and Exchange Commission (SEC) proposed a roughly 421-page revision of its transfer-agent rules, the most significant update to the framework since the late 1970s and early 1980s (1977). Transfer agents are the “bookkeepers” of U.S. securities markets, maintaining the official record of who owns what and handling corporate actions such as dividends and mergers. For the first time, the proposal explicitly writes blockchain, distributed-ledger technology (DLT), and smart contracts into the rule text, allowing these technologies to serve as a company’s official master securityholder file, or a component of it.

Crucially, this does not hand ownership records entirely to a decentralized network. The proposal is clear: one registered transfer agent must retain exclusive control over the official shareholder register and remain responsible for its accuracy, security, and production to regulators. On-chain data can carry transaction information (wallet addresses, balances, ownership percentages, purchase details) while sensitive personal information stays in a separate system. Transfer agents may choose between blockchain and a conventional database, provided the system is secure, current, and accessible. Blockchain is not mandatory; it is brought into the existing framework.

The proposal also widens regulatory visibility. Changes to Form TA-2 would require transfer agents to disclose securities arrangements using distributed ledgers and the tokenization agents and platforms involved; a technology provider does not inherit the transfer agent’s regulatory responsibility simply because the master file runs on its infrastructure. Cybersecurity, business continuity, segregation of securities and client funds (kept in designated bank accounts, not commingled with operating funds), restrictive legends, and third-party outsourcing oversight are also tightened. SEC data shows 44% of transfer agents outsourced part of their operations in 2025, and the proposal is explicit that “outsourcing technology does not outsource regulatory responsibility.”

Tokenized-infrastructure firms already registered as transfer agents are accelerating their entry: Securitize (roughly $4 billion in AUM) said the proposal matches the model it has advocated to the SEC, adding that “modernization should raise standards, not lower them”; tZERO and Injective have also completed registration. Intercontinental Exchange (ICE), parent of the New York Stock Exchange, is developing a digital securities platform for 24/7 trading and blockchain settlement and has selected Securitize and tZERO for parts of its digital transfer-agent infrastructure; Franklin Templeton’s OnChain U.S. Government Money Fund already integrates shareholder records using blockchain.

CLARITY Act: The 60-Vote Showdown on September 15, a Two-Track Race

The other track is counting down on the same day. The Senate returns from recess on September 14 and will hold a cloture vote on the CLARITY Act at 2:15 p.m. ET on September 15, the procedural gate to begin formal debate, requiring 60 votes. Republicans control 53 seats, and with Hawley and Paul expected to vote no and Tillis demanding stronger ethics language, leadership needs more than 10 Democratic crossover votes, while only two Democrats (Gallego, Alsobrooks) crossed in the Banking Committee.

Prediction markets are showing a split read: Kalshi puts the chance of a Senate vote before October 1 at 91%, while Polymarket gives CLARITY only about 13% odds of becoming law in 2026 (down from 82% in February, with over $11.5 million traded); Galaxy Research has cut its estimate to 10%. In short, the market expects a vote but does not expect a statute. The same three impasses remain: ethics provisions tied to roughly $1.4 billion in Trump crypto-linked income, the Section 604 DeFi developer liability exemption, and the stablecoin-yield fight (Coinbase’s roughly $1.35 billion in annual USDC rewards). Seven Democratic senators issued a joint statement saying the current text “falls short” on ethics, consumer protection, and illicit finance, making their votes conditional rather than committed.

The SEC’s administrative track will not wait for legislation. Beyond the transfer-agent rules, the SEC this month is also advancing Regulation Crypto Assets (issuance side, mid-August, with $5M/4-year and $75M/12-month exemptions and a conditional safe harbor) and the custody rules (sent to OIRA), while the CFTC is advancing trading-platform and tokenized-collateral rules. On September 25, the SEC will convene the NYSE, Nasdaq, Citadel Securities, Cboe, and Robinhood to discuss 24-hour trading, an agenda-setting exercise rather than a formal rule. The administrative track’s advantage is speed; its weakness is that it can be overturned by the next administration. The legislative track is more durable, but if September 15 fails, a comprehensive crypto market-structure bill is unlikely before 2029, leaving the industry to fall back on a fragmented, enforcement-led patchwork.

Key Takeaways for Practitioners