Vanguard Variable Insurance Funds - Diversified Value Portfolio
Supplement Dated June 22, 2026, to the Prospectus and Summary Prospectus
Important Changes to the Fund
The board of trustees of Vanguard Variable Insurance Funds has approved amending the investment strategy for Vanguard Variable Insurance Funds - Diversified Value Portfolio (the "Fund") effective on or about June 22, 2026. The investment objective of the Fund remains unchanged.
Prospectus and Summary Prospectus Text Changes
The following replaces the language under the "Principal Investment Strategies" heading in the Fund Summary section:
The Fund employs an active management approach, investing mainly in large- and mid-capitalization U.S. companies whose stocks are considered by an advisor to be undervalued. Undervalued stocks are generally those that are out of favor with investors and that an advisor believes are trading at prices that are below average in relation to measures such as earnings and book value. These stocks often have above-average dividend yields.
Under normal circumstances, the Fund invests at least 80% of its net assets plus the amount of any borrowings for investment purposes, in value stocks. For purposes of the 80% policy, a value stock is a stock that is included within at least one of the following value indices or a value index determined by the advisor to be similar to the foregoing: Russell 3000 Value Index, S&P 500 Value Index, S&P MidCap 400 Value Index, S&P SmallCap 600 Value Index, CRSP U.S. Mega Cap Value Index, CRSP U.S. Large Cap Value Index, CRSP U.S. Mid Cap Value Index, CRSP U.S. Small Cap Value Index, MSCI U.S. Prime Market Value Index, MSCI U.S. Small Cap Value Index, MSCI All Country World Value Index, or FTSE All-World Value Index. The Fund has multiple advisors, each of which independently selects and maintains a portfolio of common stocks for the Fund.
Prospectus Text Changes
The following is added to the end of the "Implementation of Investment Objective" subsection under More on the Fund:
Under normal circumstances, the Fund invests at least 80% of its net assets plus the amount of any borrowings for investment purposes, in value stocks. For purposes of the 80% policy, a value stock is a stock that is included within at least one of the following value indices or a value index determined by the advisor to be similar to the foregoing: Russell 3000 Value Index, S&P 500 Value Index, S&P MidCap 400 Value Index, S&P SmallCap 600 Value Index, CRSP U.S. Mega Cap Value Index, CRSP U.S. Large Cap Value Index, CRSP U.S. Mid Cap Value Index, CRSP U.S. Small Cap Value Index, MSCI U.S. Prime Market Value Index, MSCI U.S. Small Cap Value Index, MSCI All Country World Value Index, or FTSE All-World Value Index. Investments in derivatives may be counted toward the Fund's 80% policy to the extent that they provide investment exposure to the investments included within the policy or to one or more market risk factors associated with such securities. The Fund may change its 80% policy only upon 60 days' notice to shareholders.
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PS 278A 062026
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