FINRA Rule 4515

Rule 4515 sits within the 4500 Books, Records and Reports section of the 4000 Financial and Operational Rules series. It was adopted by SR-FINRA-2010-052, effective December 5, 2011, consolidating the account designation requirements of NASD Rule 3110(f) and related NYSE provisions. The rule was first amended by SR-FINRA-2019-009, effective May 8, 2019, which made conforming adjustments to the investment adviser allocation provisions. 

The most recent and operationally significant amendment — SR-FINRA-2023-017 — took effect May 28, 2024, when the U.S. securities markets transitioned from a T+2 to a T+1 standard settlement cycle. That amendment, announced in Regulatory Notice 24-04, changed the deadline in Supplementary Material .01 for investment advisers to provide specific account designations or customer names from noon of the next business day following the trading session to no later than the end of the day on the trade date — a fundamental tightening of the allocation window that aligns Rule 4515 with the same-day confirmation, allocation, and affirmation requirements of SEC Rule 15c6-2.

The Core Account Designation Requirement

The threshold obligation of Rule 4515 is deceptively simple. Before a customer order is executed, the order form or equivalent record must identify the account — or accounts — for which the order is being placed. This requirement is foundational to the integrity of every securities transaction and serves as the starting point for the rule's more demanding change-of-designation provisions. 

An order executed without account identification is an order whose ownership is ambiguous from the moment of execution — a condition that creates opportunities for after-the-fact manipulation of trade allocations to move profitable trades into favored accounts and unprofitable ones into disfavored accounts.

The phrase other similar record recognizes the evolution of order management systems. In the paper-based era, order tickets physically inscribed with account numbers were the standard. In modern electronic trading environments, the order management system's electronic record — capturing account designation at order entry — serves the same function. The essential requirement is that account identity be documented at or before execution, not reconstructed after the fact.

The Account Designation Change Framework

Rule 4515's more significant and compliance-intensive requirement governs what happens after an account designation is placed on an order — specifically the conditions under which that designation can legitimately be changed. The rule draws a sharp line between legitimate operational corrections and the manipulative practice of allocating trades based on post-execution performance, commonly known as cherry-picking.

Cherry-picking — the practice of waiting to see whether a trade is profitable before deciding which account to assign it to, directing gains to favored accounts such as the registered representative's own account or a preferred customer's account while directing losses elsewhere — is among the most serious forms of trading misconduct in the securities industry. It directly harms the customers whose accounts receive the losing trades and violates both the fair dealing obligations of FINRA Rule 2010 and the anti-fraud provisions of FINRA Rule 2020. Rule 4515's change-of-designation framework is the bookkeeping mechanism through which this fraud is detected and deterred.

No account designation change is permissible absent three conditions that must all be satisfied. First, a qualified and registered principal designated by the member must authorize the change. The required seniority — a designated principal, not merely any registered person — reflects the significance of the approval function. Account designation changes require independent supervisory judgment, not self-authorization by the person who placed the original order. Second, that principal must be personally informed of the essential facts relative to the change before giving approval — the approval cannot be granted blindly or based on a subordinate's characterization. 

Third, the approval must be indicated in writing on the order or other similar record, and the essential facts relied upon must be separately documented in writing and preserved for the period and accessibility specified in Exchange Act Rule 17a-4(b) — the six-year records preservation standard with the first two years in an easily accessible location.

The pre-execution timing rule in the final sentence of Rule 4515 is among the most operationally demanding aspects of the rule. For any designation change that takes place prior to execution of the trade — such as when an order is being staged or set up and the account designation needs to be corrected before the order is routed — both the approval and the documentation must be completed before the trade executes. This prevents the scenario where a pre-execution change is technically logged as occurring before execution while the supervisory approval is obtained after the fact. The rule is explicit: where the change precedes execution, the compliance process must also precede execution.

Error Accounts and Related Accounts

The rule's parenthetical references to error accounts and related accounts address two specific operational contexts that generate legitimate account designation changes in broker-dealer practice.

Error accounts — proprietary accounts maintained by broker-dealers to capture trades executed under erroneous instructions, system errors, or operational failures — are a recognized feature of the securities industry's trade correction process. 

A trade that was executed in the wrong security, for the wrong quantity, at the wrong price, or in the wrong account as a result of a genuine operational error may legitimately need to be moved into an error account while the correction is processed. Rule 4515's approval and documentation requirements apply to these movements as well — the operational legitimacy of an error correction does not exempt the firm from the requirement to have a principal approve the change with knowledge of the underlying facts, and to document those facts in writing.

Related accounts — accounts that are economically or operationally connected to the primary customer account, such as sub-accounts, family accounts, retirement accounts maintained alongside taxable accounts, or accounts of entities controlled by the same customer — also generate legitimate designation change requests when orders are initially placed in one account and need to be reattributed to a related account. The rule's application to related accounts prevents the use of account relationship structures to circumvent the designation change controls.

The T+1 Amendment and the Investment Adviser Allocation Exception

Supplementary Material .01 of Rule 4515 contains a significant exception to the immediate account designation requirement, applicable to orders submitted by investment advisers on behalf of multiple clients. This exception — and its May 2024 amendment — is one of the most practically significant aspects of the rule for firms that execute orders for investment advisers running block trading programs.

Under the exception as it existed from the rule's December 2011 adoption through May 27, 2024, members could accept orders from investment advisers and allow those advisers to make account allocations — specifying which client accounts would receive which portions of a block execution — after the trade was executed, provided the investment adviser provided specific account designations or customer names by noon of the next business day following the trading session. This next-day-noon window reflected the operational reality of block trading: an investment adviser placing a block order for multiple client accounts does not always know, at order entry, precisely how the eventual execution will be allocated across accounts, particularly for orders that execute over an extended period or across multiple sessions.

The transition to T+1 settlement on May 28, 2024 fundamentally changed this window. SEC Rule 15c6-2, adopted as part of the T+1 package, requires that allocation, confirmation, and affirmation processes be completed as soon as technologically practicable and no later than the end of the day on trade date. Allowing until noon of the next business day for account designations to be provided by investment advisers was inconsistent with this same-day requirement. 

FINRA's amendment through SR-FINRA-2023-017 tightened the Supplementary Material .01 deadline from noon of the next business day to no later than the end of the day on the trade date. Investment advisers submitting orders for multiple client accounts must now ensure that specific account designations or customer names are provided to the executing member by end of day on trade date — not the following morning.

The amendment preserved all other conditions of the Supplementary Material .01 exception. The investment adviser must be registered under the Investment Advisers Act or would be required to register but for the exemptions in Sections 203(b) or 203(A) of that Act. The exception applies to outside investment advisers and to associated persons of a member acting in an investment advisory capacity on the member's behalf. It does not apply to individual registered representatives who exercise ordinary discretionary authority under FINRA Rule 3260. 

And critically, nothing in the rule or supplementary material may be construed as permitting a member to knowingly facilitate allocation of orders from investment advisers other than in compliance with both the investment adviser's intent at the time of execution to allocate on a percentage basis and the investment adviser's fiduciary duty with respect to allocations — which expressly prohibits post-hoc cherry-picking even within the exception framework.

Cherry-Picking, Front-Running, and the Enforcement Context

Rule 4515's supervisory significance is inseparable from the enforcement context surrounding account designation manipulation. FINRA and the SEC have brought numerous enforcement actions over the decades involving registered representatives who exploited account designation flexibility to engage in cherry-picking. Common patterns include: registered representatives who executed trades in a personal or proprietary account and then, after observing whether the position was profitable, submitted account change requests moving gains to their own account and losses to customer accounts; advisers who ran block orders and then allocated shares disproportionately to favored clients — including themselves or related persons — based on post-execution price movements; and cases where account designation records were created or altered retroactively to conceal improper allocation decisions.

The 2026 FINRA Annual Regulatory Oversight Report identified manipulative trading practices — including trading ahead, front-running, and improper trade allocation — as ongoing examination priorities. FINRA's examination approach to Rule 4515 compliance focuses on whether the designated principal approval process is genuine and contemporaneous rather than a rubber-stamp formality, whether essential facts documentation is substantive enough to support supervisory review, whether the firm's account change records reveal patterns suggesting post-execution performance-based allocation, and whether the May 2024 T+1 amendment's end-of-trade-date deadline for investment adviser allocation submissions is being observed.

Firms that have not updated their written supervisory procedures to reflect the May 2024 amendment are operationally out of compliance. Any firm whose WSPs still reference noon of the next business day as the investment adviser allocation deadline is applying an outdated standard that was superseded on May 28, 2024.

Supervisory Obligations and Written Supervisory Procedures

Rule 4515 operates within the supervisory framework of FINRA Rule 3110. Written supervisory procedures must specifically address the account designation process from order entry through any subsequent changes, identifying who bears responsibility for placing account designations on order records at time of entry; the approval process for designation changes including the designation of qualified principals, the essential facts documentation standard, and the timing requirements for pre-execution changes; the procedures for error account movements including the specific approval and documentation requirements; the processes for handling investment adviser block trade allocations under Supplementary Material .01, including the updated end-of-trade-date deadline; and the surveillance procedures used to detect patterns of account designation changes that may indicate cherry-picking or other manipulative allocation practices.

FINRA Rule 3120's supervisory control testing should include periodic review of account designation change records to verify that principal approvals were contemporaneous with the changes, that essential facts documentation was completed, and that the pattern of changes does not suggest performance-based allocation.

Examination Relevance and Key Takeaways

FINRA Rule 4515 is tested on the Series 7 General Securities Representative examination in the context of order entry requirements, account administration, and the prohibition on cherry-picking. The Series 24 General Securities Principal examination tests the rule in depth covering the principal approval requirements, the essential facts documentation standard, the pre-execution timing rule, and the investment adviser allocation exception including its May 2024 T+1 amendment. The rule appears frequently in examination questions presenting scenarios involving account designation changes after trade execution and asking whether the required supervisory approval steps have been followed.

The key points to retain are these: FINRA Rule 4515 requires that before any customer order is executed, the account name or designation must be placed on the order form or similar record; no change to any account name or designation — including related accounts and error accounts — may be made unless a qualified and registered principal designated by the member has been personally informed of the essential facts before approving the change, has indicated approval in writing on the order or record, and the essential facts relied upon have been separately documented in writing and preserved under Exchange Act Rule 17a-4(b)'s six-year standard; where a designation change precedes trade execution, both the approval and documentation must also precede execution; Supplementary Material .01 provides an exception allowing investment advisers submitting orders for multiple clients to provide specific account designations after execution, but as amended effective May 28, 2024 under SR-FINRA-2023-017 — announced in Regulatory Notice 24-04 — the deadline for providing those designations was shortened from noon of the next business day to no later than the end of the day on the trade date, aligning the rule with the same-day allocation and affirmation requirements of SEC Rule 15c6-2; the investment adviser exception applies only to registered investment advisers or those exempt from registration, to both outside advisers and advisory personnel of the member, but not to individual registered representatives exercising ordinary discretion under Rule 3260; nothing in the rule permits a member to knowingly facilitate allocation by investment advisers other than in compliance with the adviser's intent at execution and its fiduciary duty; and firms whose written supervisory procedures still reference the pre-May 2024 noon-next-business-day standard are operating under an outdated and non-compliant framework.