A segregated mandate is an investment arrangement in which a single client’s money is managed in a dedicated portfolio, with the client retaining direct legal ownership of every security held. A professional manager runs the account under a written contract, but the stocks, bonds, and other instruments sit in a custodial account in the client’s name rather than being pooled with other investors’ assets. That one structural fact drives the customization, tax treatment, and transparency that distinguish this approach from buying shares of a mutual fund.
How the Arrangement Is Structured
The relationship is governed by an Investment Management Agreement, usually called an IMA. It is a binding contract that sets out the manager’s discretionary authority, the investment objectives, the constraints on what can be bought and sold, performance benchmarks, fees, and reporting obligations. The investment guidelines are typically attached as a separate exhibit so the client can modify them over time by written notice.1U.S. Securities and Exchange Commission. Investment Management and Services Agreement – Enact Mortgage Insurance Corporation
The assets themselves are held by a qualified custodian, generally a bank or registered broker-dealer, in an account under the client’s name. The manager places trades and makes allocation decisions; the custodian holds the securities and settles the transactions. Legal title never passes to the manager.
Segregated mandates require serious 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 room to negotiate on fees and terms.
How a Segregated Mandate Differs From a Pooled Fund
In a mutual fund, you own shares of the fund and the fund owns the securities. In a segregated mandate, you own the securities. Several practical consequences flow from that distinction.
Other investors cannot affect your portfolio. When a mutual fund experiences heavy redemptions, the manager may have to sell appreciated positions to raise cash, generating capital gains distributions that reach every shareholder, including those who didn’t sell. Large inflows can force the manager to put money to work at unfavorable prices. A segregated portfolio is insulated from both dynamics because it serves only one client.
You also avoid embedded capital gains. A new mutual fund investor inherits the tax exposure on gains that accrued inside the fund before they bought in; if the manager later sells those positions, the gain is distributed to current shareholders. In a segregated mandate, your cost basis in each security reflects what was actually paid on your behalf.
Customizing the Portfolio
The IMA’s investment guidelines function as a rulebook the manager must follow. They typically cover:
- Permissible investments, specifying which asset classes, credit qualities, or geographic markets the manager can use.
- Concentration limits, capping exposure to any single issuer, sector, or country.
- Ethical or ESG screens that exclude specific companies, industries, or practices. A university endowment might prohibit fossil fuel holdings; a religious organization might exclude alcohol or gambling.
- Benchmark selection, so performance is measured against an index that fits the actual objective rather than a generic default.
Customization matters most when the client’s wider financial position creates risks a generic strategy would ignore. A corporate pension plan heavily exposed to its own industry can use its mandate to avoid additional concentration in that sector. That kind of tailoring is impossible inside a pooled fund where all investors share one portfolio.
Tax Treatment
Direct ownership opens tax strategies pooled vehicles cannot replicate. The most useful is tax-loss harvesting: selling individual securities that have declined to realize losses, then using those losses to offset gains elsewhere or up to $3,000 of ordinary income per year.2Internal Revenue Service. Topic No. 409 – Capital Gains and Losses A mutual fund investor can only harvest losses by selling the fund shares, an all-or-nothing move. A segregated mandate lets the manager pick off individual losers while leaving the overall strategy intact.
The manager can also time gain realization around your tax situation. In a high-income year the manager may defer sales of appreciated positions; in a year with losses to absorb, the manager may accelerate them. None of that coordination is possible inside a pooled fund, where the manager has no visibility into any individual investor’s tax picture.
The Wash Sale Rule
Loss harvesting has a limit. Federal tax law disallows a loss if you buy a substantially identical security within 30 days before or after the sale.3Office of the Law Revision Counsel. 26 USC 1091 – Loss From Wash Sales of Stock or Securities The disallowed loss is added to the cost basis of the replacement shares, so the benefit is deferred rather than permanently lost. Managers typically work around the rule by replacing a sold position with a similar but not identical security, keeping market exposure intact while respecting the 30-day window.
Fees
Fees are negotiated directly between client and manager. The standard arrangement is an asset-based fee on a tiered schedule, with the percentage declining as the account grows. Investment advisers registered with the SEC must disclose their fee schedule in Part 2A of Form ADV, including whether fees are negotiable.4U.S. Securities and Exchange Commission. Form ADV Part 2A
Segregated mandate clients often negotiate lower management fees than a comparable pooled fund charges. A true comparison, though, requires looking at total cost. Custody fees, transaction costs, and audit fees are paid separately in a segregated account, whereas a mutual fund bundles those into its expense ratio. The segregated structure makes each cost visible, which is useful if you want to understand what you’re paying for and where.
Some IMAs include a performance-based fee that pays the manager extra for beating a benchmark. These are usually built with two guardrails. A hurdle rate means no performance fee is earned until returns clear a specified threshold. A high-water mark means no performance fee can be charged on gains that merely recover prior losses; the portfolio must surpass its previous peak before the fee resumes. Federal securities law also restricts performance-based fees to “qualified clients” under the Investment Advisers Act, though segregated mandate clients typically clear those thresholds given the account sizes involved.
The Manager’s Legal Duties
An investment adviser managing a segregated mandate owes the client a fiduciary duty under federal law. The SEC describes this as two obligations. The duty of care requires advice in the client’s best interest, best execution on trades, and ongoing monitoring of the portfolio. The duty of loyalty prohibits the adviser from putting its own interests ahead of the client’s and requires full disclosure of material conflicts.5U.S. Securities and Exchange Commission. Commission Interpretation Regarding Standard of Conduct for Investment Advisers These duties are rooted 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
When the client is a pension plan, ERISA adds another layer. A fiduciary must act prudently and solely in the interest of plan participants, for the exclusive purpose of providing benefits and defraying reasonable plan expenses.7U.S. Department of Labor. Field Assistance Bulletin No. 2014-01
Custody and Why Assets Are Bankruptcy-Remote
SEC Rule 206(4)-2 requires client assets to be held with 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 That segregation is what makes the assets bankruptcy-remote: if the manager fails financially, client assets are not part of the manager’s estate because they were never the manager’s property.
The rule also requires an annual surprise examination by an independent public accountant, who verifies the existence and condition of client funds and securities at an unannounced time. Material discrepancies must be reported to the SEC within one business day.8eCFR. 17 CFR 275.206(4)-2 – Custody of Funds or Securities of Clients by Investment Advisers In a segregated mandate the client typically selects the custodian, which creates an independent relationship with the institution actually holding the assets.
Reporting Triggers That Come With Direct Ownership
Direct ownership at scale carries public reporting obligations the pooled-fund investor never sees. An institutional investment manager exercising discretion over $100 million or more in qualifying securities must file Form 13F with the SEC within 45 days of each calendar quarter’s end, disclosing its holdings.9U.S. Securities and Exchange Commission. Frequently Asked Questions About Form 13F
On the client side, if holdings in a single company exceed 5% of that company’s 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 a mandate concentrated in small- or mid-cap stocks, that threshold can arrive faster than clients anticipate. The IMA should spell out how the manager tracks position sizes against these triggers.
Oversight and Reporting the Client Receives
Reporting on a segregated mandate goes well beyond a quarterly fund statement. Typical deliverables include transaction records for every trade, performance attribution that breaks down what drove returns, and compliance reports confirming the portfolio stayed within the IMA’s guidelines. The client also has working access to the portfolio managers running the strategy, not a customer service line. Many institutional clients add independent oversight on top of that, hiring investment consultants or using internal compliance staff to check the portfolio against the IMA’s rules.
Ending the Mandate
Terminating a segregated mandate is more involved than redeeming fund shares. The IMA sets the required notice period and the unwinding process. The manager may be told to liquidate everything to cash or to transfer securities in-kind to a new manager or custodian.
Liquidation is simple but can generate meaningful transaction costs and taxable gains, especially in a concentrated portfolio. In-kind transfer avoids those tax consequences but needs coordination among the outgoing manager, the incoming manager, and the custodian; the incoming manager usually will 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 limit unnecessary trading and performance drag. The transition itself carries real risk: during the handoff the assets are no longer being managed to the old strategy and not yet being managed to the new one, so keeping the portfolio’s risk profile close to target throughout is the point of hiring a specialist for the job.