A sub-advisor is an outside investment management firm that a fund’s primary advisor hires to handle the day-to-day portfolio decisions for all or part of the fund’s assets. The primary advisor, sometimes called the sponsor, keeps overall control of the fund and remains the entity named on its SEC filings and Form ADV.1Securities and Exchange Commission. Form ADV – General Instructions The sub-advisor works inside a defined mandate, picking securities and executing trades, while operations, distribution, shareholder reporting, and regulatory compliance stay with the primary advisor. The structure is most common in mutual funds and other registered investment companies where a single fund complex needs specialized expertise across multiple asset classes.
From a shareholder’s perspective, the split is usually invisible. The name on the fund’s marketing materials is the primary advisor; the person actually choosing the stocks or bonds may work at a firm the investor has never heard of.
What the Primary Advisor Delegates and What It Keeps
The sub-advisor’s role is narrow and deep. Within its mandate — emerging-market equities, high-yield bonds, Japanese small caps, whatever the assignment is — it picks the individual securities, executes trades, and monitors the holdings. The primary advisor sets the guardrails: overall asset allocation, risk limits, leverage restrictions, and the investment universe the sub-advisor can draw from.
Everything that isn’t security selection stays with the primary advisor. That includes fund accounting, shareholder reporting, distribution, marketing, and regulatory filings. The primary advisor signs the registration statements and answers to the SEC. The sub-advisor, in most cases, operates behind the scenes.
Why Funds Use Sub-Advisors
The plainest reason is access to expertise the primary advisor doesn’t have in-house. A large fund complex offering products across every asset class cannot realistically staff top-tier teams for each one. Contracting with a specialist that already has the analysts, relationships, and track record is faster and cheaper than building the same capability from scratch.
Capacity is another driver. When a single strategy gets too large, execution quality suffers because the manager’s own orders move markets. Splitting assets among multiple sub-advisors running the same strategy independently keeps each portfolio at a manageable size and provides diversification within a single fund. If one sub-advisor’s process runs into trouble, the others may offset the damage.
There is also an operational advantage. If a sub-advisor underperforms or loses key personnel, the primary advisor can terminate the relationship and bring in a replacement. From the shareholder’s perspective the fund continues without interruption — same ticker, same account, same tax lot. That kind of flexibility is hard to match when portfolio management is done entirely in-house and the star manager walks out the door.
How Sub-Advisors Get Paid
The sub-advisor is paid by the primary advisor, not by the fund or its shareholders directly. The primary advisor collects the full management fee disclosed in the fund’s prospectus and pays the sub-advisor a negotiated portion of that fee. Shareholders see one transparent fee and never see the internal split.
The standard arrangement is an asset-based fee, typically tiered so the percentage declines as the asset base grows. Specialized or capacity-constrained strategies command higher rates than large-cap mandates where the sub-advisor is essentially running a rules-based process. The split between primary advisor and sub-advisor varies with the asset class, the sub-advisor’s bargaining power, and how much operational burden the primary advisor keeps.
Some agreements include performance-based fees. The Investment Advisers Act of 1940 generally prohibits advisors from charging fees tied to capital gains or appreciation of client assets, but registered investment companies can use a “fulcrum fee” structure, where the fee increases and decreases symmetrically based on performance relative to a benchmark.2Office of the Law Revision Counsel. 15 U.S. Code 80b-5 – Investment Advisory Contracts
The Rules That Govern the Relationship
The legal architecture comes primarily from Section 15 of the Investment Company Act of 1940. The statute treats a sub-advisory contract the same as any other advisory contract with a registered fund, so every requirement that applies to the primary advisory agreement applies here too.
Written Contract and Shareholder Approval
Section 15(a) makes it unlawful to serve as an investment advisor to a registered fund except under a written contract approved by a majority vote of the fund’s shareholders. The contract must precisely describe all compensation to be paid and must let the fund’s board or shareholders terminate the agreement on no more than 60 days’ written notice without penalty.3Office of the Law Revision Counsel. 15 U.S. Code 80a-15 – Contracts of Advisers and Underwriters
The contract also cannot run longer than two years from its execution date unless it is renewed annually, either by a vote of the fund’s board or by a majority of the fund’s outstanding shares.
Independent Board Approval
Section 15(c) adds a second layer. The fund’s board must approve the contract, and the approving majority must consist of directors who are not parties to the contract and not “interested persons” of any party. The board has an affirmative duty to request whatever information is reasonably necessary to assess the arrangement, and the advisor has a matching duty to provide it.3Office of the Law Revision Counsel. 15 U.S. Code 80a-15 – Contracts of Advisers and Underwriters
In practice, the annual review is one of the most involved processes in fund governance. The board evaluates the quality of the sub-advisor’s services, the reasonableness of fees relative to comparable funds, the sub-advisor’s profitability, and whether economies of scale are being shared with shareholders.
Automatic Termination on Assignment
If a sub-advisor is acquired, merges with another firm, or undergoes any change of control that constitutes an “assignment” under the Act, the sub-advisory contract terminates automatically. No board vote is required; the termination happens by operation of law.3Office of the Law Revision Counsel. 15 U.S. Code 80a-15 – Contracts of Advisers and Underwriters The point is to prevent a fund’s assets from being managed by a firm the shareholders never approved. Resuming the relationship or hiring a replacement starts the full approval process over.
When a contract terminates unexpectedly, the fund can operate under an interim contract for up to 150 days while it obtains shareholder approval for a permanent replacement. The interim contract must pay no more than the previous one, and the board (including a majority of independent directors) must approve it within 10 business days of the termination.4eCFR. 17 CFR 270.15a-4 – Temporary Exemption for Certain Investment Advisers
Manager-of-Managers Relief
Section 15(a) technically requires a shareholder vote every time a fund hires a new sub-advisor. For a multi-manager fund that rotates sub-advisors periodically, calling a shareholder meeting each time is slow and expensive, and shareholders generally chose the fund because they trusted the primary advisor’s manager selection in the first place.
Since the mid-1990s, the SEC has granted exemptive orders allowing “manager of managers” funds to hire, fire, and replace sub-advisors without a shareholder vote, subject to protective conditions. The SEC has issued over 100 such orders, and funds operating under them held hundreds of billions in assets even by the early 2000s.5U.S. Securities and Exchange Commission. Exemption From Shareholder Approval for Certain Subadvisory Contracts
The main conditions: the sub-advisory change cannot increase the aggregate advisory fee charged to the fund; the sub-advisor cannot be an affiliated person of the primary advisor (with a narrow exception for wholly-owned subsidiaries replacing each other); shareholders must have previously authorized the primary advisor to operate under this structure; and the primary advisor must supervise and oversee the sub-advisor’s activities.5U.S. Securities and Exchange Commission. Exemption From Shareholder Approval for Certain Subadvisory Contracts
The board must still approve every sub-advisor change. The exemption removes the shareholder vote, not the board’s oversight role. And any change that would increase the total advisory fee still triggers a full shareholder vote.6U.S. Securities and Exchange Commission. IM Guidance Update
What the Primary Advisor Watches After Hiring
Hiring is the start of the oversight obligation, not the end of it. The primary advisor is responsible for continuously monitoring the sub-advisor’s performance, compliance with the fund’s investment guidelines, and adherence to federal securities laws.
In practice that means monthly or quarterly reviews of portfolio holdings, trading activity, risk exposures, and style drift. The primary advisor checks whether the sub-advisor is staying within its permitted universe and risk parameters. Deviations get flagged; persistent problems lead to conversations that can end in termination. The primary advisor’s chief compliance officer typically has direct access to the sub-advisor’s compliance personnel and receives regular and exception-based reports.3Office of the Law Revision Counsel. 15 U.S. Code 80a-15 – Contracts of Advisers and Underwriters
Soft Dollars
Under Section 28(e) of the Securities Exchange Act, a sub-advisor can direct trades to a broker-dealer that charges higher commissions in exchange for investment research and brokerage services. This is known as a “soft dollar” arrangement. The sub-advisor avoids breaching fiduciary duties so long as it determines in good faith that the commission paid is reasonable relative to the value of the research received.7U.S. Securities and Exchange Commission. Interpretive Release Concerning the Scope of Section 28(e) of the Securities Exchange Act of 1934 and Related Matters
The safe harbor does not cover products or services that are commercially available to the general public, and it does not shield managers from antifraud claims, churning allegations, or failures to seek best price. Sub-advisors must disclose their brokerage allocation practices and use of commission dollars.7U.S. Securities and Exchange Commission. Interpretive Release Concerning the Scope of Section 28(e) of the Securities Exchange Act of 1934 and Related Matters
Best Execution
Sub-advisors routing fund trades through broker-dealers also face best execution obligations. FINRA Rule 5310 requires firms to use reasonable diligence to find the best market for a security so the resulting price is as favorable as possible under prevailing conditions. Firms must compare execution quality against competing markets and additional sources of liquidity, and must either change their routing when better execution is available elsewhere or document why the current arrangements are justified.8FINRA. Customer Order Handling: Best Execution and Order Routing Disclosures
Who Is Liable When Something Goes Wrong
The primary advisor cannot outsource its fiduciary duty by hiring a sub-advisor. The Investment Company Act imposes a fiduciary duty on advisors regarding compensation under Section 36(b), and the primary advisor’s continuing obligations to the fund survive the delegation of portfolio management. The Act also prohibits advisory agreements, including sub-advisory agreements, from containing provisions that would shield the advisor or sub-advisor from liability for willful misconduct, bad faith, gross negligence, or reckless disregard of their duties.
When trading errors occur, there is no universal bright-line rule for who pays. Responsibility depends on the terms of the sub-advisory agreement, the nature of the error, and whether a third party contributed to the mistake. Some errors fall squarely on the sub-advisor, such as a fat-finger trade entered by their desk. Others involve shared responsibility when the primary advisor’s instructions were ambiguous. The agreement typically spells out the standard of care, indemnification provisions, and the process for investigating and remediating errors.
The primary advisor bears the reputational and regulatory risk regardless of where the error originated. The SEC examines the primary advisor’s oversight framework, not just the sub-advisor’s compliance program. A primary advisor that cannot demonstrate documented monitoring of its sub-advisors is the one regulators will hold accountable.