“The broker question turns on five words in the Securities Exchange Act — 'for the account of others.' An AI agent that executes trades for other people is effecting transactions for their accounts, and registration follows the function, not the fact that a model pressed the button.”
Whether your AI trading agent must register as a broker-dealer turns on what it actually does with other people’s trades. Under the Securities Exchange Act of 1934, a “broker” is any person engaged in the business of effecting transactions in securities for the account of others — so an agent that executes trades for other people’s accounts is doing the very thing that requires broker registration. An agent that trades its principal’s own account may instead be an exempt “trader,” and one that matches different users’ orders can cross into being an exchange. Autonomy does not change which hat the agent wears; the function does.
This is the third registration question an AI trading product has to answer, alongside investment-adviser status and — where the agent moves customer money — money transmission. They are separate regimes that can stack. This guide covers the broker-dealer piece: the broker test, the dealer-versus-trader line, the compensation hallmark the SEC watches most closely, the narrow exemptions, when an order-matching agent becomes an exchange, and why there is no AI-specific rule to wait for.
Key takeaways
- First, is it a security at all? The broker-dealer regime reaches only “securities” (§ 3(a)(10)). If the agent trades non-security tokens, commodities, or futures and swaps, this framework may not apply and the CFTC’s regimes may govern instead.
- “For the account of others” is the broker trigger. An agent that effects transactions for someone else’s account is a broker; one that trades only its own account is not, on that test alone.
- The dealer line is “a regular business.” Buying and selling one’s own account as a regular business (liquidity, market-making) is dealer activity; the same for one’s own account but not as a regular business is an exempt trader.
- Transaction-based compensation is the hallmark. Pay tied to whether or how much a transaction happens is the factor the SEC weighs most heavily toward broker status.
- Matching orders can make you an exchange. An agent that brings together multiple users’ orders and matches them can trigger exchange or ATS regulation on top of broker-dealer rules.
- No AI-specific rule is coming. The SEC’s 2024 dealer rule was vacated and its 2023 AI-conflicts proposal was withdrawn; the traditional framework governs.
Which hat is your agent wearing?
The first move is to identify the function, because an AI trading agent can wear more than one hat, each with its own regime:
| Function | Statutory hook | Regime |
|---|---|---|
| Effects transactions for the account of others | ”Broker,” § 3(a)(4) | Broker registration + FINRA membership |
| Buys/sells its own account as a regular business | ”Dealer,” § 3(a)(5) | Dealer registration |
| Buys/sells its own account, not a regular business | Trader exclusion, § 3(a)(5)(B) | Excluded from dealer registration |
| Advises others about securities for compensation | ”Investment adviser,” Advisers Act | Adviser registration (state or SEC) |
| Matches multiple users’ orders | Functional “exchange,” Rule 3b-16 | Exchange registration or ATS |
The broker and adviser questions are distinct and can both apply: advising is one hat, executing is another. We cover the adviser side in a companion guide.1 Below is the broker-dealer analysis.
Start here: are you effecting transactions for the account of others?
One threshold question comes before everything below: the broker-dealer regime reaches only transactions in securities (§ 3(a)(10)). If your agent trades non-security digital assets, commodities, or futures and swaps, the SEC broker-dealer framework may not apply at all — the Commodity Exchange Act and the CFTC’s registration categories (futures commission merchant, commodity trading advisor, commodity pool operator), or other regimes, may govern instead. And where digital assets are securities, they carry their own special broker-dealer custody and ATS wrinkles. Answer the securities-status question first; the rest of this guide assumes the instruments traded are securities.2
The broker definition is short and decisive. The Exchange Act defines a “broker” as “any person engaged in the business of effecting transactions in securities for the account of others” (15 U.S.C. § 78c(a)(4)).3 Two ideas do the work: engaged in the business (regularity, holding out) and for the account of others (acting on someone else’s account, not your own). An AI agent that places, routes, and executes trades in other people’s brokerage accounts is effecting transactions for the account of others—the core of broker activity—and it is unlawful for a broker to use interstate commerce to effect securities transactions unless it is registered with the SEC (§ 15(a)(1)), and, for essentially all non-exchange-only firms, a member of FINRA (§ 15(b)(8)).4 Two layers commonly ride on top of federal registration: the individuals who operate the broker may need to register as associated persons, and many states impose their own “blue sky” broker-dealer registration.
The contrast case is the personal tool. An agent that operates only inside the user’s own brokerage account, executing the user’s own trades, is not acting for the account of others — the user is trading their own account with an automated assistant. (Even there, a vendor that exercises investment discretion over the account, or takes transaction-based compensation, can still raise adviser or other questions.) The line to watch is the moment the same technology is offered to other people to run their accounts: that is when the broker question arrives, regardless of how autonomous the model is.
Broker or dealer or trader: the “regular business” line
If the agent trades its own account rather than others’, the question shifts to the dealer definition. A “dealer” is “any person engaged in the business of buying and selling securities … for such person’s own account through a broker or otherwise” (§ 3(a)(5)(A)); the Act separately excludes a person who buys and sells for its own account “but not as a part of a regular business” — the “trader” (§ 3(a)(5)(B)).5 Because both a dealer and a trader trade their own account, ownership of the account does not distinguish them. The line is regular business: holding out to provide liquidity, quoting two-sided markets, and earning the bid-ask spread as a regular business are the classic dealer hallmarks, while merely investing or speculating a principal’s own account — however actively — points to the trader exclusion.
This matters directly for AI market-making agents. An agent that provides continuous liquidity and quotes markets as a regular business drifts toward dealer status. Importantly, the SEC tried in 2024 to draw a bright line here — adopting a rule that would have swept many liquidity providers into the dealer definition — but a federal court vacated that rule in late 2024 as exceeding the SEC’s authority, and the rule is not in effect.6 The practical result: there is no mechanical liquidity test, and the analysis returns to the traditional, fact-specific dealer-trader distinction.
The compensation hallmark, and the factors the SEC watches
Whether an agent is “engaged in the business” is a facts-and-circumstances question, and the SEC’s Guide to Broker-Dealer Registration sets out the activities that indicate broker status: soliciting or finding investors or customers; participating in key parts of a securities transaction — solicitation, negotiation, or execution — with some regularity; handling the funds or securities of others in connection with transactions; and, above all, receiving transaction-based compensation.7 Compensation tied to whether, or how much, a transaction occurs is a hallmark the SEC weighs heavily, because it aligns the agent’s incentives with transacting.
For an AI trading product, these factors are worth pressure-testing before launch. Does the agent solicit customers? Does it execute or route their trades? Does it hold their funds or securities? Is any part of the fee tied to trading activity or volume? A “yes” to these — especially transaction-based compensation — pushes hard toward broker registration, and the label the product uses for itself does not control.
The exemptions are narrow — and “finder” is not one
Two genuine, but narrow, safe harbors exist. The issuer associated-person rule (Rule 3a4-1) provides that an associated person of an issuer is not deemed a broker solely for participating in the sale of that issuer’s securities, but only if strict conditions are met — no statutory disqualification, no transaction-based compensation, no association with a broker-dealer, and one of the limited-activity prongs.8 The foreign broker-dealer rule (Rule 15a-6) exempts a foreign broker-dealer for specified categories, including unsolicited transactions and transactions intermediated through a chaperoning U.S.-registered broker-dealer.8 Note the limits, though: Rule 3a4-1 by its terms shelters only a natural person associated with an issuer — not an autonomous agent or the entity behind it — and Rule 15a-6 shelters only a foreign broker-dealer. Neither is an AI-agent-specific exemption, and whether the people or entities behind an agent can use them is fact-specific.
What is not a safe harbor is “finder” status. There is no general statutory finder exemption from broker registration; the SEC has treated the concept narrowly, and it collapses as soon as a person solicits investors or takes transaction-based compensation. Treating an AI agent as an unregistered “finder” because it merely “introduces” trades is a legally risky posture, not a plan.
When the agent matches orders, it may be an exchange
A distinct escalation applies if the agent does not route orders to an outside market but instead matches users against each other. An entity is a functional “exchange” when it “[b]rings together the orders for securities of multiple buyers and sellers” and “[u]ses established, non-discretionary methods … under which such orders interact with each other, and the buyers and sellers … agree to the terms of a trade” (Rule 3b-16).9 An AI system that internally crosses one user’s buy order against another user’s sell order meets that functional test, and must then either register as a national securities exchange or operate as an alternative trading system under Regulation ATS — which itself requires broker-dealer registration and a Form ATS filing. Order-matching stacks exchange/ATS obligations on top of the broker-dealer analysis; it does not replace it.9
There is no AI-specific rule to wait for
Some builders assume a dedicated AI rule will tell them when an agent must register. It will not, at least not now. The SEC’s 2023 proposal on conflicts from broker-dealers’ and advisers’ use of predictive data analytics was withdrawn in June 2025, and the 2024 dealer rule was vacated (above). There is no AI-specific broker-dealer rule in force. What governs is the traditional framework — the broker and dealer definitions, the registration and FINRA-membership requirements, the exchange and ATS rules, and the facts-and-circumstances “engaged in the business” analysis — applied to an autonomous agent exactly as to any other market participant. Whether and when a given AI agent (or its developer) must register is an open question regulators are actively examining, but the answer today is found in the existing statutes, not in a rule that has not been written.10
What to do first
In order: (1) identify the function honestly — does the agent execute for others (broker), trade its own account as a regular business (dealer) or not (trader), advise (adviser), or match users (exchange/ATS); (2) pressure-test the broker factors, above all whether any compensation is transaction-based; (3) if it trades its own account, work the dealer-trader line deliberately, without relying on the vacated bright-line rule; (4) do not lean on “finder” status; and (5) if the agent matches orders, analyze exchange/ATS registration on top of everything else. Each of these should be resolved with counsel before the agent trades in front of real customers.
This article provides general information only and is not legal advice. Broker-dealer, exchange, and ATS requirements are fact-specific and evolving, and their application to autonomous AI agents is an emerging area under active regulatory attention. Several items described here — including SEC release numbers, the status of vacated or withdrawn rules, and pinpoint rule citations — should be confirmed against the controlling statute, rule, release, or decision before you rely on them. Whether and how any requirement applies to a particular business is a determination to make with qualified counsel. No attorney-client relationship is formed by this article. Attorney Advertising.
Work with Astraea Counsel
Astraea Counsel advises fintech, crypto, and AI companies on broker-dealer, exchange, and securities regulation, registration strategy, and the questions raised by autonomous AI agents. Explore our Regulatory Compliance services or contact us to discuss your product.
Related resources
- Does Your AI Trading Agent Need to Register as an Investment Adviser? — the adviser hat, and the Lowe publisher line
- Does Your Agentic-Payments Startup Need a Money Transmitter License? — when the agent moves customer money
- The SEC/CFTC Token Taxonomy: Five Categories — whether the instruments traded are securities at all
Notes
Footnotes
-
See Astraea Counsel, “Does Your AI Trading Agent Need to Register as an Investment Adviser?” (the adviser-status analysis, including the Lowe v. SEC publisher line and the state-vs-SEC registration thresholds). ↩
-
Exchange Act § 3(a)(10), 15 U.S.C. § 78c(a)(10) (definition of “security”); Commodity Exchange Act, 7 U.S.C. § 1 et seq. (CFTC jurisdiction over commodities, futures, and swaps, and the futures commission merchant, commodity trading advisor, and commodity pool operator registration categories). The broker-dealer framework applies only where the instruments traded are securities. ↩
-
Securities Exchange Act of 1934 § 3(a)(4)(A), 15 U.S.C. § 78c(a)(4) (defining “broker” as a person “engaged in the business of effecting transactions in securities for the account of others”). ↩
-
Exchange Act § 15(a)(1), 15 U.S.C. § 78o(a)(1) (registration requirement for brokers and dealers); § 15(b)(8), 15 U.S.C. § 78o(b)(8) (membership in a registered securities association — FINRA — for registered broker-dealers, subject to the exchange-only exception). ↩
-
Exchange Act § 3(a)(5)(A)-(B), 15 U.S.C. § 78c(a)(5) (defining “dealer” as “any person engaged in the business of buying and selling securities … for such person’s own account through a broker or otherwise,” and excluding at subparagraph (B) a person who buys and sells for its own account “but not as a part of a regular business” — the “trader” exclusion; the dealer-trader line turns on whether the own-account trading is part of a regular business). ↩
-
Further Definition of “As a Part of a Regular Business” in the Definition of Dealer and Government Securities Dealer, Exchange Act Release No. 34-99477 (Feb. 2024) (Rules 3a5-4, 3a44-2), vacated, National Association of Private Fund Managers v. SEC, No. 4:24-cv-00250 (N.D. Tex. Nov. 21, 2024) (rule vacated as exceeding statutory authority; not in effect). ↩
-
SEC, Guide to Broker-Dealer Registration, Division of Trading and Markets (factors indicating broker status, including solicitation of investors, participation in securities transactions with regularity, handling of customer funds or securities, and — the most-emphasized hallmark — receipt of transaction-based compensation). ↩
-
17 CFR 240.3a4-1 (issuer associated-person safe harbor, conditioned on, among other things, no transaction-based compensation); 17 CFR 240.15a-6 (foreign broker-dealer exemption). There is no general statutory “finder” exemption from broker registration. ↩ ↩2
-
17 CFR 240.3b-16 (functional definition of “exchange”: bringing together orders of multiple buyers and sellers using established, non-discretionary methods under which orders interact and parties agree to terms); Exchange Act §§ 5-6, 15 U.S.C. §§ 78e-78f (exchange registration); 17 CFR 240.3a1-1 and 17 CFR 242.300-242.303 (Regulation ATS; ATS exemption from exchange registration, conditioned on broker-dealer registration and a Form ATS filing). ↩ ↩2
-
SEC, Conflicts of Interest Associated with the Use of Predictive Data Analytics by Broker-Dealers and Investment Advisers, Release No. 34-97990 (proposed 2023; withdrawn June 2025) (no AI-specific rule in force; existing framework governs). ↩
