This actively managed, mid-capitalization option invests primarily in the stocks of mid-size domestic companies that the fund’s investment managers believe have stronger earnings and revenue growth prospects than the average mid-cap company. Investors who are seeking exposure to the mid-cap arena of the U.S. stock market and who are willing to endure the volatility that can come from an investment in stocks may wish to consider this fund as an option for their portfolio.The Vanguard Mid-Cap Growth Fund changed investment managers on November 17, 2025. This may result in capital gains distributions, which could be taxable if you hold shares in a regular (taxable) account. Vanguard provides monthly updates on estimated realized and unrealized gains in the "Distributions" section of the fund’s website page.The expense ratio for Mid-Cap Growth Fund will increase from 33bps to 39bps, with a 5bp fee waiver, making the effective expense ratio 34bps.