A segregated mandate is an investment arrangement in which a professional manager runs a dedicated portfolio for a single client, and the client directly owns every security held in it. The assets sit in a custodial account in the client’s name, the manager has discretionary authority to trade within agreed rules, and the entire relationship is governed by a customized contract. That direct ownership is the feature that separates the structure from a mutual fund or any other pooled vehicle, and it drives nearly every practical difference that follows.
How the Arrangement Is Structured
Three elements define the setup: a client, a manager with discretion, and a custodian. The client signs an Investment Management Agreement, commonly called an IMA, with the manager. The IMA sets the manager’s authority, the investment objectives, what the manager can and cannot buy, the performance benchmark, the fees, and the reporting the client will receive. Investment guidelines are often attached as a separate exhibit so the client can update them without renegotiating the entire contract.
The assets themselves are held by a qualified custodian, typically a bank or a registered broker-dealer, in an account under the client’s name. The manager instructs trades; the custodian settles and safekeeps. Because the securities are legally the client’s property rather than the manager’s, they are bankruptcy-remote: if the manager fails financially, those assets are not part of the manager’s estate.
Segregated mandates require scale. Minimums generally start in the tens of millions of dollars and can reach $100 million or more for specialized strategies. That scale is what makes the arrangement economically viable for the manager and gives the client real leverage to negotiate terms.
How It Differs From a Pooled Fund
When you buy a mutual fund, you own shares of the fund, and the fund owns the securities. In a segregated mandate, you own the securities. That single distinction produces several consequences other investors’ behavior can’t reach you through.
Heavy redemptions from a mutual fund can force the manager to sell appreciated positions to raise cash, and the resulting capital gains distributions hit every shareholder, including those who didn’t sell. Large inflows can force the manager to buy at unfavorable prices. A segregated mandate is insulated from both dynamics because the portfolio serves one client. Liquidity depends on what you hold, not on what other investors are doing.
Direct ownership also solves the embedded-gains problem. Buy into a mutual fund that has held appreciated securities for years and you inherit exposure to the tax liability on those unrealized gains. In a segregated mandate, your cost basis reflects what was actually paid for each security in your account.
Customizing the Investment Strategy
The investment guidelines in the IMA function as a rulebook the manager must follow, and they can be written to fit the client rather than the other way around. Common areas of customization include:
- Permissible investments, specifying which asset classes, credit qualities, or geographic markets are in play.
- Concentration limits, capping exposure to any single issuer, sector, or country.
- Ethical or ESG screens, excluding specific companies, industries, or practices. A university endowment might prohibit fossil fuel holdings; a religious organization might exclude alcohol or gambling.
- Benchmark selection, choosing a performance measure that matches the client’s actual objective rather than a generic index.
This matters most when the client’s broader financial position creates risks a generic strategy would ignore. A corporate pension plan heavily exposed to its sponsor’s industry, for instance, can use its segregated mandate to avoid piling on more exposure to the same sector. That kind of tailoring is not available inside a pooled fund where every investor shares one portfolio.
Tax Control the Structure Enables
Because you own the individual securities, a segregated mandate opens tax strategies pooled vehicles can’t replicate. The most useful is tax-loss harvesting: selling positions that have declined to realize losses, then using those losses to offset gains elsewhere or up to $3,000 of ordinary income per year.1Internal Revenue Service. Topic No. 409 – Capital Gains and Losses A mutual fund holder can only harvest losses by selling fund shares outright, which is all-or-nothing. In a segregated mandate, the manager can pick off individual losers while keeping the overall strategy intact.
Timing works the other direction too. If you’re facing an unusually high-income year, the manager can defer selling appreciated positions. If you have losses to use up, the manager can accelerate gains. That coordination is impossible inside a pooled fund, where the manager has no visibility into any single investor’s tax picture.
The Wash Sale Limit
Loss harvesting has a rule attached. Federal tax law disallows a loss if you buy a “substantially identical” security within 30 days before or after the sale.2Office of the Law Revision Counsel. 26 USC 1091 – Loss From Wash Sales of Stock or Securities Sell a stock at a loss on Monday, buy it back the following week, and the loss is disallowed. The disallowed amount is added to the replacement shares’ cost basis, so the benefit is deferred rather than lost, but you don’t get it now. Managers work around the rule by replacing a sold position with a similar but not identical security, keeping market exposure while respecting the 30-day window.
Fees and Cost Transparency
Fees are negotiated directly. The standard model is an asset-based fee on a tiered schedule, with the percentage dropping as the account gets larger. Advisers registered with the SEC must disclose their fee schedule in Part 2A of Form ADV, including whether the fees are negotiable.3U.S. Securities and Exchange Commission. Form ADV Part 2A
Because of the scale involved, the negotiated management fee is often lower in percentage terms than what a comparable pooled fund charges. Comparing total cost requires more care, though. A segregated mandate client pays custody fees to the bank, transaction costs on each trade, and external audit fees separately. In a mutual fund those costs are bundled into the expense ratio. The unbundled structure is more transparent, but you have to add the pieces together to know what you’re paying.
Performance-Based Fees
Some IMAs add a performance-based fee tied to beating a benchmark. Two guardrails are typical. A hurdle rate means no performance fee is earned unless returns clear a specified threshold. A high-water mark means the manager cannot collect performance fees on gains that merely recover prior losses; the portfolio has to surpass its previous peak before the fee resumes.
Federal law limits who can be charged performance fees. Under the Investment Advisers Act, only “qualified clients” are eligible. For 2026, the SEC has proposed raising the qualifying thresholds to $1,400,000 in assets under management with the adviser, or a net worth of at least $2,700,000.4Federal Register. Performance-Based Investment Advisory Fees Segregated mandate clients typically clear these thresholds comfortably given the account sizes involved.
Fiduciary Duty and Custody Protections
An adviser managing a segregated mandate owes the client a fiduciary duty under federal law. The SEC has interpreted this as two obligations. The duty of care requires the adviser to provide advice in the client’s best interest, seek best execution on trades, and monitor the portfolio over time. The duty of loyalty means the adviser cannot put its own interests ahead of the client’s and must fully disclose all material conflicts.5U.S. Securities and Exchange Commission. Commission Interpretation Regarding Standard of Conduct for Investment Advisers The obligations are grounded in the anti-fraud provisions of Section 206 of the Investment Advisers Act.6Office of the Law Revision Counsel. 15 USC 80b-6 – Prohibited Transactions by Investment Advisers
If the mandate belongs to a retirement plan governed by ERISA, an additional fiduciary layer applies to the plan and its managers, with rules about acting solely in the interest of participants.7U.S. Department of Labor. Field Assistance Bulletin No. 2014-01
On custody, SEC Rule 206(4)-2 requires that client funds and securities be held at a qualified custodian in a separate account under the client’s name, or in an account containing only client assets under the adviser’s name as agent or trustee.8eCFR. 17 CFR 275.206(4)-2 – Custody of Funds or Securities of Clients by Investment Advisers The rule also requires an annual surprise examination by an independent public accountant, who verifies the existence and condition of the assets at an unannounced time. In a segregated mandate the client generally selects the custodian directly, so the client has its own relationship with the institution safekeeping the portfolio.
Reporting Triggers to Watch
Large accounts pull both the manager and the client into disclosure regimes worth knowing about before they surprise you.
An institutional investment manager exercising discretion over $100 million or more in qualifying securities must file Form 13F with the SEC, disclosing its holdings within 45 days of each calendar quarter’s end.9U.S. Securities and Exchange Commission. Frequently Asked Questions About Form 13F Segregated mandate holdings count toward that threshold.
On the client side, beneficial-ownership reporting can be triggered when the portfolio accumulates a meaningful stake in a single issuer. Once holdings in a particular company exceed 5% of its outstanding equity, a Schedule 13D or 13G must be filed with the SEC.10U.S. Securities and Exchange Commission. Exchange Act Sections 13(d) and 13(g) – Beneficial Ownership Reporting For mandates concentrated in small- or mid-cap stocks, that line can be crossed sooner than expected. The IMA should spell out how the manager monitors position sizes against those triggers.
What Ongoing Oversight Looks Like
Reporting to a segregated mandate client is a step deeper than a fund statement. Standard deliverables include transaction records for every trade, performance attribution showing what drove returns, and compliance reports confirming the portfolio stayed within the IMA’s guidelines during the period.
The client also has direct access to the portfolio managers and senior investment staff running the strategy. It’s a working relationship, not a customer service line: the client can talk through market conditions, ask about individual positions, and flag compliance questions in real time. Many institutional clients add an independent layer on top, whether a third-party investment consultant or an internal compliance team that checks the portfolio against the IMA on its own.
Ending a Segregated Mandate
Winding down is more involved than selling fund shares. The IMA specifies the notice period and the process. The client can direct the manager to liquidate all positions for cash or to transfer securities in-kind to a new manager or custodian.
Liquidation is simple to execute but can generate meaningful transaction costs and realized capital gains, especially in a concentrated portfolio. An in-kind transfer avoids those tax consequences but takes coordination among the outgoing manager, the incoming manager, and the custodian, and the incoming manager may not want every position, so some trading still happens.
For large or complex portfolios, institutions often bring in a transition manager, a specialist who sequences the restructuring to hold down trading costs and the performance drag that comes from being between strategies. The transition window, which can run from days to months depending on the portfolio’s liquidity, is a genuine risk period: the assets are no longer managed to the old strategy and not yet managed to the new one. A capable transition manager keeps the portfolio’s risk characteristics close to the target throughout.