Oppenheimer Capital Appreciation Fund/VA

Oppenheimer Conservative Balanced Fund/VA

Oppenheimer Discovery Mid Cap Growth Fund/VA

Oppenheimer Global Fund/VA

Oppenheimer Global Multi-Alternatives Fund/VA

Oppenheimer Global Strategic Income Fund/VA

Oppenheimer Government Money Fund/VA

Oppenheimer International Growth Fund/VA

Oppenheimer Main Street Fund^®/VA

Oppenheimer Main Street Small Cap Fund^®/VA

Oppenheimer Total Return Bond Fund/VA

Supplement dated July 26, 2017 to the Prospectus

This supplement amends the Prospectus of each of the above-referenced Funds (each, a “Fund”), and is in addition to any other supplements.

1. For each Fund except, Oppenheimer Global Multi-Alternatives Fund/VA, the section titled “Conflicts of Interest” under the section “About the Fund’s Investments” is deleted in its entirety and replaced with the following:

Conflicts of Interest. The investment activities of the Manager, the Sub-Adviser and their affiliates with respect to other funds and accounts they manage may present potential conflicts of interest that could, under certain circumstances, disadvantage or adversely affect the Fund and its shareholders. The Manager, the Sub-Adviser or their affiliates advise other funds and accounts that have investment objectives and strategies that differ from, and may be contrary to, those of the Fund. That may result in another fund or account holding investment positions that are adverse to the Fund’s investment strategies or activities. Other funds or accounts advised by the Manager, the Sub-Adviser or their affiliates may also have conflicting interests arising from investment objectives and strategies that are similar to those of the Fund. For example, those funds and accounts may engage in, and compete for, the same types of investment opportunities as the Fund or invest in securities of the same issuers that have different features and interests as compared to securities held by the Fund. These features (such as seniority, guarantees and differential voting rights) may, under certain circumstances, come into conflict with or disadvantage securities held by the Fund. Because the Manager, the Sub-Adviser and their affiliates may carry out the investment activities of those other funds or accounts without regard to the investment objectives or performance of the Fund, it is possible that the value of investments held by the Fund or the Fund’s investment strategies may be adversely affected.

The Fund’s investment performance will usually differ from the performance of other funds or accounts that are also advised by the Fund’s Manager, the Sub-Adviser or their affiliates even in cases where the investment objectives and strategies of the relevant funds or accounts are similar. When managing multiple funds or accounts, the Fund’s Manager, the Sub-Adviser and their affiliates may make decisions with respect to investment positions held by certain funds or accounts that may cause the Fund to experience losses during periods in which other funds or accounts achieve gains. This may include causing another fund or account to take actions with respect to an issuer’s liquidation, restructuring, default or corporate actions that may conflict with the interests of the Fund. Similar conflicts may also arise when the Fund and other funds or accounts invest in different parts of an issuer’s capital structure, such as when the Fund holds equity or debt obligations of an issuer, and

another fund or account holds more senior (or junior) debt obligations of the same issuer, or when the Fund and other funds or accounts hold securities of different issuers that have competing claims to the same assets or sources of payment. In such circumstances, decisions regarding whether to trigger an event of default, the terms of any potential workout or restructuring of a distressed issuer, liquidating or selling an investment, corporate actions, litigation or other investment decisions may, and often do, result in conflicts of interest. The Fund may receive lower returns on its investment in an issuer as a result of actions taken with respect to the same or related issuers by other investors, including other funds or accounts managed by the Manager, the Sub-Adviser or their affiliates.

The Fund’s Manager, the Sub-Adviser or their affiliates may manage funds or accounts with different fee rates and/or fee structures, including funds or accounts that pay advisory fees based on account performance (“performance fee accounts”). Such differences in fee arrangements may raise potential conflicts of interest by creating an incentive to favor higher-fee accounts. For example, the Manager, the Sub-Adviser or their affiliates could potentially allocate the most attractive investments to higher-fee accounts or performance fee accounts, or the trading of higher-fee accounts could potentially be favored as to timing and/or execution price.

The Manager and the Sub-Adviser have adopted policies and procedures designed to mitigate where possible potential conflicts of interest identified by the Manager and the Sub-Adviser. However, such policies and procedures may also limit the Fund’s investment activities and affect its performance. For example, the investment activities of such funds or accounts may result in the Manager’s, the Sub-Adviser’s or their affiliates’ receipt of material non-public information concerning certain securities, which could lead to restrictions in the trading of such securities or other investment activities of the Fund or other funds or accounts managed by the Manager, the Sub-Adviser or their affiliates. In certain cases, the Fund’s Manager, the Sub-Adviser or their affiliates may avoid certain investment opportunities or actions that would potentially give rise to conflicts with other funds or accounts, which could also have the effect of limiting the Fund’s investment opportunities and performance. In other cases, the Fund’s Manager, the Sub-Adviser or their affiliates may choose not to or fail to avoid investment opportunities or action that would potentially give rise to conflicts with other funds or accounts, which could under certain circumstances disadvantage the Fund while advantaging other funds or accounts or vice versa.

The Manager, the Sub-Adviser and their affiliates may also face other potential conflicts of interest in managing the Fund, and the information above is not a complete description of every conflict that could be deemed to exist when simultaneously managing the Fund and other funds and accounts.

The Fund offers its shares to separate accounts of different insurance companies, as an investment for their variable annuity contracts, variable life insurance policies and other investment products. While the Fund does not foresee any disadvantages to contract owners from these arrangements, it is possible that the interests of owners of different contracts participating in the Fund through different separate accounts might conflict. For example, a conflict could arise because of differences in tax treatment.

2. For Oppenheimer Global Multi-Alternatives Fund/VA, the section titled “Conflicts of Interest” under the section “About the Fund’s Investments” is deleted in its entirety and replaced with the following:

Conflicts of Interest. The investment activities of the Manager, the Sub-Adviser, the Sub-Sub-Adviser and their affiliates with respect to other funds and accounts they manage may present potential conflicts of interest that could, under certain circumstances, disadvantage or adversely affect

the Fund and its shareholders. The Manager, the Sub-Adviser, the Sub-Sub-Adviser or their affiliates advise other funds and accounts that have investment objectives and strategies that differ from, and may be contrary to, those of the Fund. That may result in another fund or account holding investment positions that are adverse to the Fund’s investment strategies or activities. Other funds or accounts advised by the Manager, the Sub-Adviser, the Sub-Sub-Adviser or their affiliates may also have conflicting interests arising from investment objectives and strategies that are similar to those of the Fund. For example, those funds and accounts may engage in, and compete for, the same types of investment opportunities as the Fund or invest in securities of the same issuers that have different features and interests as compared to securities held by the Fund. These features (such as seniority, guarantees and differential voting rights) may, under certain circumstances, come into conflict with or disadvantage securities held by the Fund. Because the Manager, the Sub-Adviser, the Sub-Sub-Adviser and their affiliates may carry out the investment activities of those other funds or accounts without regard to the investment objectives or performance of the Fund, it is possible that the value of investments held by the Fund or the Fund’s investment strategies may be adversely affected.

The Fund’s investment performance will usually differ from the performance of other funds or accounts that are also advised by the Fund’s Manager, the Sub-Adviser, the Sub-Sub-Adviser or their affiliates even in cases where the investment objectives and strategies of the relevant funds or accounts are similar. When managing multiple funds or accounts, the Fund’s Manager, the Sub-Adviser, the Sub-Sub-Adviser and their affiliates may make decisions with respect to investment positions held by certain funds or accounts that may cause the Fund to experience losses during periods in which other funds or accounts achieve gains. This may include causing another fund or account to take actions with respect to an issuer’s liquidation, restructuring, default or corporate actions that may conflict with the interests of the Fund. Similar conflicts may also arise when the Fund and other funds or accounts invest in different parts of an issuer’s capital structure, such as when the Fund holds equity or debt obligations of an issuer, and another fund or account holds more senior (or junior) debt obligations of the same issuer, or when the Fund and other funds or accounts hold securities of different issuers that have competing claims to the same assets or sources of payment. In such circumstances, decisions regarding whether to trigger an event of default, the terms of any potential workout or restructuring of a distressed issuer, liquidating or selling an investment, corporate actions, litigation or other investment decisions may, and often do, result in conflicts of interest. The Fund may receive lower returns on its investment in an issuer as a result of actions taken with respect to the same or related issuers by other investors, including other funds or accounts managed by the Manager, the Sub-Adviser, the Sub-Sub-Adviser or their affiliates.

The Fund’s Manager, the Sub-Adviser, the Sub-Sub-Adviser or their affiliates may manage funds or accounts with different fee rates and/or fee structures, including funds or accounts that pay advisory fees based on account performance (“performance fee accounts”). Such differences in fee arrangements may raise potential conflicts of interest by creating an incentive to favor higher-fee accounts. For example, the Manager, the Sub-Adviser, the Sub-Sub-Adviser or their affiliates could potentially allocate the most attractive investments to higher-fee accounts or performance fee accounts, or the trading of higher-fee accounts could potentially be favored as to timing and/or execution price.

The Manager, the Sub-Adviser and the Sub-Sub-Adviser have adopted policies and procedures designed to mitigate where possible potential conflicts of interest identified by the Manager, the Sub-Adviser and the Sub-Sub-Adviser. However, such policies and procedures may also limit the Fund’s investment activities and affect its performance. For example, the investment activities of such funds or accounts may result in the Manager’s, the Sub-Adviser’s, the Sub-Sub-Adviser’s or their affiliates’ receipt of material non-public information concerning certain securities, which could lead to restrictions in the trading of such securities or other investment activities of the Fund or other funds or

accounts managed by the Manager, the Sub-Adviser, the Sub-Sub-Adviser or their affiliates. In certain cases, the Fund’s Manager, the Sub-Adviser, the Sub-Sub-Adviser or their affiliates may avoid certain investment opportunities or actions that would potentially give rise to conflicts with other funds or accounts, which could also have the effect of limiting the Fund’s investment opportunities and performance. In other cases, the Fund’s Manager, the Sub-Adviser, the Sub-Sub-Adviser or their affiliates may choose not to or fail to avoid investment opportunities or action that would potentially give rise to conflicts with other funds or accounts, which could under certain circumstances disadvantage the Fund while advantaging other funds or accounts or vice versa.

The Manager, the Sub-Adviser, the Sub-Sub-Adviser and their affiliates may also face other potential conflicts of interest in managing the Fund, and the information above is not a complete description of every conflict that could be deemed to exist when simultaneously managing the Fund and other funds and accounts.

The Fund offers its shares to separate accounts of different insurance companies, as an investment for their variable annuity contracts, variable life insurance policies and other investment products. While the Fund does not foresee any disadvantages to contract owners from these arrangements, it is possible that the interests of owners of different contracts participating in the Fund through different separate accounts might conflict. For example, a conflict could arise because of differences in tax treatment.

July 26, 2017 PS0000.173