To pursue its goal, the fund is authorized to invest in U.S. government securities, such as:

• U.S. Treasury bills and notes

• other obligations that are issued by the U.S. government, its agencies or instrumentalities, including obligations that are not fully guaranteed by the U.S. Treasury, such as those issued by the Federal National Mortgage Association (Fannie Mae), the Federal Home Loan Mortgage Corporation (Freddie Mac) and the Federal Home Loan Banks

• repurchase agreements that are collateralized fully by cash and/ or U.S. government securities

• obligations that are issued by private issuers that are guaranteed as to principal or interest by the U.S. government, its agencies or instrumentalities

The fund intends to operate as a government money market fund under the regulations governing money market funds.

The fund will (i) invest at least 99.5% of its total assets in cash, U.S. government securities and/or repurchase agreements that are collateralized fully by cash and/or U.S. government securities, and (ii) under normal circumstances, invest at least 80% of its net assets (including, for this purpose, any borrowings for investment purposes) in U.S. government securities, including repurchase agreements that are collateralized fully by U.S. government securities. With respect to the 80% policy, the fund will notify its shareholders at least 60 days before changing the policy.

In choosing securities, the fund’s manager seeks to maximize current income within the limits of the fund’s investment objective and credit, maturity and diversification policies. Some of these policies may be stricter than the federal regulations that apply to all money market funds.

The investment adviser’s credit research department analyzes and monitors the securities that the fund owns or is considering buying. The manager may adjust the fund’s holdings or its average maturity based on actual or anticipated changes in interest rates or credit quality. To preserve its investors’ capital, the fund seeks to maintain a stable $1.00 share price.

For temporary defensive purposes during unusual market conditions, the fund may invest up to 100% of its assets in cash, cash equivalents or other high quality short-term investments.

As a government money market fund, the fund’s Board of Trustees (the Board) has determined not to subject the fund to a liquidity fee on fund redemptions. Please note that the Board has reserved its ability to change this determination with respect to liquidity fees, but only after providing appropriate prior notice to shareholders.

The bar chart below shows how the fund’s investment results have varied from year to year, and the following table shows the fund’s average annual total returns for various periods. This information provides some indication of the risks of investing in the fund. All figures assume distributions were reinvested. The figures do not reflect the fees and expenses of any insurance company separate account or variable insurance contract issued by such insurance company. Such expenses, if included, would lower the figures shown. The fund’s past performance is not necessarily an indication of how the fund will perform in the future. Prior to April 14, 2016, the fund was named Schwab Money Market Portfolio, and the fund operated under certain different investment policies. The fund’s historical performance may not represent its current investment policies. Keep in mind that future performance may differ from past performance. For current performance information, please see www.schwabassetmanagement.com/prospectus or call toll-free 1-877-824-5615 for the fund’s current seven-day yield.

The fund is subject to risks, any of which could cause an investor to lose money. The fund’s principal risks include:

Investment Risk

Stable Net Asset Value Risk — If the fund or another money market fund fails to maintain a stable net asset value (or such perception exists in the market place), the fund could experience increased redemptions, which may adversely impact the fund’s share price.

Credit Risk — A decline in the credit quality of an issuer, guarantor or liquidity provider of a portfolio investment or a counterparty could cause the fund to lose money or underperform. The fund could lose money if, due to a decline in credit quality, the issuer, guarantor or liquidity provider of a portfolio investment or a counterparty fails to make, or is perceived as being unable or unwilling to make, timely principal or interest payments or otherwise honor its obligations. Even though the fund's investments in repurchase agreements are collateralized at all times, there is some risk to the fund if the other party should default on its obligations and the fund is delayed or prevented from recovering or disposing of the collateral. The credit quality of the fund’s portfolio holdings can change rapidly in certain market environments and any downgrade or default on the part of a single portfolio investment could cause the fund’s share price or yield to fall.

Certain U.S. government securities that the fund invests in are not backed by the full faith and credit of the U.S. government, which means they are neither issued nor guaranteed by the U.S. Treasury. Although maintained in conservatorship by the Federal Housing Finance Agency (FHFA) since September 2008, Fannie Mae and Freddie Mac maintain only lines of credit with the U.S. Treasury. The Federal Home Loan Banks maintain limited access to credit lines from the U.S. Treasury. Other securities, such as obligations issued by the Federal Farm Credit Banks Funding Corporation, are supported solely by the credit of the issuer. There can be no assurance that the U.S. government will provide financial support to securities of its agencies and instrumentalities if it is not obligated to do so under law. Also, any government guarantees on securities the fund owns do not extend to the shares of the fund itself.

Redemption Risk — The fund may experience periods of heavy redemptions that could cause the fund to liquidate its assets at inopportune times or at a loss or depressed value, particularly during periods of declining or illiquid markets. Redemptions by a

few large investors in the fund may have a significant adverse effect on the fund’s ability to maintain a stable $1.00 share price. In the event any money market fund fails to maintain a stable net asset value, other money market funds, including the fund, could face a market-wide risk of increased redemption pressures, potentially jeopardizing the stability of their $1.00 share prices.

Tax Diversification Risk — As described above, the fund intends to operate as a government money market fund under the regulations governing money market funds. Additionally, the fund intends to meet the diversification requirements that are applicable to insurance company separate accounts under Subchapter L of the Internal Revenue Code of 1986, as amended, (the Code) (the Diversification Requirements). To satisfy the Diversification Requirements applicable to variable annuity contracts, the value of the assets of the fund invested in securities issued by the U.S. government, its agencies or instrumentalities must remain below specified thresholds. For these purposes, each U.S. government agency or instrumentality is treated as a separate issuer.

Operating as a government money market fund may make it difficult for the fund to meet the Diversification Requirements. This difficulty may be exacerbated by the potential increase in demand for the types of securities in which the fund invests as a result of changes to regulations or market conditions. A failure to satisfy the Diversification Requirements could have significant adverse tax consequences for variable life insurance and variable annuity contract owners whose contract values are determined by investment in the fund. See “Distributions and Taxes” for more information.