What Is the SEC's New Statement on Crypto Asset Securities Custody by Broker-Dealers?

The SEC’s Division of Trading and Markets issued a significant staff statement clarifying the application of Rule 15c3-3(b)(1)—the “possession or control” requirement—to broker-dealers holding crypto asset securities for customers.

The statement outlines five specific measures that, if implemented, would lead the Division not to recommend enforcement action against a broker-dealer for treating itself as having “physical possession” of fully paid and excess margin crypto asset securities. This guidance is limited to paragraph (b)(1) of the customer protection rule and does not address broader obligations under federal securities laws, including other aspects of the broker-dealer financial responsibility rules. For market participants searching SEC crypto custody rules 2025, broker-dealer crypto assets, or Rule 15c3-3 crypto guidance, this interim statement provides long-awaited clarity while the Commission continues broader rulemaking.

Key Measures for Broker-Dealers to Achieve “Possession or Control”

The Division specified five circumstances where broker-dealers can reasonably deem themselves in possession of crypto asset securities:

1. Direct Access and Transfer Capability The broker-dealer has direct access to the crypto asset security and can transfer it on the distributed ledger.
2. Ongoing Assessment of Distributed Ledger Technology Reasonably designed policies to assess the DLT/network before custody and at regular intervals, examining governance, updates, and vulnerabilities.
3. Avoiding Custody with Known Problems No possession claimed if material security, operational, or other risks (beyond market/reputational) are identified.
4. Private Key Protection Industry-best-practice policies and controls to prevent theft, loss, or unauthorized use of private keys—ensuring no customer or third-party access without broker-dealer authorization.
5. Disruption and Wind-Down Planning Pre-identified steps for events like blockchain malfunctions, 51% attacks, forks, or airdrops; compliance with lawful orders (e.g., freeze/seize); and arrangements for asset transfer in bankruptcy or liquidation.

These measures aim to mitigate unique risks of blockchain custody while maintaining customer protection standards.

Scope and Limitations of the Statement

• Narrow Focus: Applies only to Rule 15c3-3(b)(1) possession requirement.
• Not Comprehensive: Does not cover full customer protection rule, antifraud, or other obligations.
• Interim Nature: Staff views as bridge while Commission considers broader issues.
• No Endorsement: Compliance with these measures does not guarantee no enforcement for other violations.

The statement responds to market requests for clarity amid growing broker-dealer interest in crypto services.

Implications for Broker-Dealers and the Crypto Market

This guidance lowers a major barrier for traditional broker-dealers offering crypto asset services, potentially encouraging compliant custody models. It emphasizes risk-based assessments and robust controls tailored to blockchain characteristics, without requiring full off-chain possession analogs.

• Innovation Support: Enables broker-dealers to custody crypto securities responsibly.
• Institutional On-Ramp: May accelerate mainstream adoption of digital assets.
• Risk Management: Highlights need for DLT due diligence and contingency planning.
• Broader Context: Aligns with 2025 regulatory thawing (e.g., GENIUS Act, probe closures).

In summary, the SEC Division of Trading and Markets’ December 18, 2025, statement provides targeted relief under Rule 15c3-3(b)(1) for broker-dealers meeting five specific measures when custodying crypto asset securities—offering clarity amid ongoing Commission deliberations. This interim guidance supports responsible innovation while maintaining core investor protections. Review the full statement on the SEC website for details, and monitor related rulemaking for comprehensive developments in U.S. crypto custody standards.