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Rowe Price Diversified Mid-Cap Growth Fund, Inc. 2025-03-01 Diversified Mid-Cap Growth Fund Investment Objective(s) The fund seeks to provide long-term capital growth by investing primarily in the common stocks of mid-cap growth companies. Fees and Expenses This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may also incur brokerage commissions and other charges when buying or selling shares of the fund, which are not reflected in the table or example below. Shareholder fees (fees paid directly from your investment) 20 0 Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment) 0.0063 0.0063 0.0021 0.0004 0.0084 0.0067 Example This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods, that your investment has a 5% return each year, and that the fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be: 86 268 466 1037 68 214 373 835 Portfolio Turnover The fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when the fund’s shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund’s performance. During the most recent fiscal year, the fund’s portfolio turnover rate was 46.8% of the average value of its portfolio. Portfolio Turnover 0.468 Principal Investment Strategies The fund normally invests at least 80% of its net assets (plus any borrowings for investment purposes) in a broadly diversified portfolio of common stocks of mid-cap growth companies. Shareholders will receive at least 60 days’ prior notice of a change to the fund’s 80% investment policy. For purposes of the fund’s 80% investment policy, the fund considers a company to be a growth company if the company’s securities are represented in an appropriate third-party growth-oriented index. Any derivatives that provide exposure to the investment focus suggested by the fund’s name, or to one or more market risk factors associated with the investment focus suggested by the fund’s name, are counted (as applicable) toward compliance with the fund’s 80% investment policy. The fund defines a mid-cap company as a company whose market capitalization falls within the market capitalization range of companies in the Russell Midcap Index, MSCI USA Mid Cap Index or MSCI World Mid Cap Index (after systematically removing any companies that cannot reasonably be considered a mid-cap company from the high and low ends of the range of each index). The market capitalizations of the companies in the indexes change over time and the indexes are periodically reconstituted to ensure that they continue to accurately reflect the mid-cap equity market. As of December 31, 2024, the market capitalization range represented across these indexes (after removing any outlier companies) was $1.8 billion to $79 billion. The fund has the flexibility to purchase some large-cap and small-cap companies that have qualities consistent with the portfolio’s core characteristics. The adviser expects the earnings of these companies to grow at a faster rate than the average company. The portfolio is broadly diversified, and the top 25 holdings are not expected to constitute a large portion of the fund’s assets. This broad diversification should help reduce the effects of individual security price volatility on overall fund performance.Stock selection is based on a combination of fundamental, bottom-up analysis and top-down quantitative strategies in an effort to identify companies with superior long-term appreciation prospects. The adviser generally uses a growth approach, looking for companies with one or more of the following characteristics:· a demonstrated ability to consistently increase revenues, earnings, and cash flow;· capable management;· attractive business niches; and· a sustainable competitive advantage.Valuation measures, such as a company’s price/earnings (P/E) ratio relative to the market and its own growth rate, are also considered. The adviser typically limits holdings of high-yielding stocks, but the payment of dividends—even above-average dividends—does not disqualify a stock from consideration. Most holdings are expected to have relatively low dividend yields.At times, the fund may have a significant portion of its assets invested in the same economic sector, such as the information technology sector. Principal Risks The fund’s share price fluctuates, which means you could lose money by investing in the fund. Mid-cap stocks: Investments in securities issued by mid-cap companies are likely to be more volatile than investments in securities issued by large-cap companies. Mid-cap companies may have less seasoned management, narrower product lines, and less capital reserves and liquidity than large-cap companies, and are therefore more sensitive to economic, market, and industry changes. Growth investing: The fund’s growth approach to investing could cause it to underperform other stock funds that employ a different investment style. Growth stocks tend to be more volatile than certain other types of stocks and their prices may fluctuate more dramatically than the overall stock market. A stock with growth characteristics can have sharp price declines due to decreases in current or expected earnings and may lack dividends that can help cushion its share price in a declining market. Stock investing: Stocks generally fluctuate in value more than bonds and may decline significantly over short time periods. There is a chance that stock prices overall will decline because stock markets tend to move in cycles, with periods of rising and falling prices. The value of stocks held by the fund may decline due to general weakness or volatility in the stock markets in which the fund invests or because of factors that affect a particular company or industry. Market conditions: The value of the fund’s investments may decrease, sometimes rapidly or unexpectedly, due to factors affecting an issuer held by the fund, particular industries, or the overall securities markets. A variety of factors can increase the volatility of the fund’s holdings and markets generally, including economic, political, or regulatory developments, recessions, inflation, rapid interest rate changes, war, military conflict, acts of terrorism, natural disasters, and outbreaks of infectious illnesses or other widespread public health issues (such as the coronavirus pandemic) and related governmental and public responses (including sanctions). Certain events may cause instability across global markets, including reduced liquidity and disruptions in trading markets, while some events may affect certain geographic regions, countries, sectors, and industries more significantly than others. Government intervention in markets may impact interest rates, market volatility, and security pricing. These adverse developments may cause broad declines in market value due to short-term market movements or for significantly longer periods during more prolonged market downturns. Sector exposure: Issuers in the same economic sector may be similarly affected by economic or market events, making the fund more vulnerable to unfavorable developments in that economic sector than funds that invest more broadly. Information technology sector: Information technology companies face intense competition, both domestically and internationally, which may have an adverse effect on their profit margins. Like other technology companies, information technology companies may have limited product lines, markets, financial resources, or personnel. Quantitative models: The fund’s reliance on quantitative models and the analysis of specific metrics in constructing the fund’s portfolio could cause the adviser to be unsuccessful in selecting companies for investment or determining the weighting of particular stocks in the portfolio. The impact of these metrics on a stock’s performance can be difficult to predict and stocks that previously possessed certain desirable quantitative characteristics may not continue to demonstrate those same characteristics in the future. In addition, relying on quantitative models entails the risk that the models themselves may be limited or incorrect, the data on which the models rely may be incorrect or incomplete, or the models may not be implemented as intended by the adviser. Any of these factors could cause the fund to underperform funds with similar strategies that do not select stocks based on quantitative analysis. Active management: The fund’s overall investment program and holdings selected by the fund’s investment adviser may underperform the broad markets, relevant indices, or other funds with similar objectives and investment strategies. Cybersecurity breaches: The fund could be harmed by intentional cyberattacks and other cybersecurity breaches, including unauthorized access to the fund’s assets, confidential information, or other proprietary information. In addition, a cybersecurity breach could cause one of the fund’s service providers or financial intermediaries to suffer unauthorized data access, data corruption, or loss of operational functionality. Performance The following performance information provides some indication of the risks of investing in the fund. The fund’s performance information represents only past performance (before and after taxes) and is not necessarily an indication of future results. The following bar chart illustrates how much returns can differ from year to year by showing calendar year returns and the best and worst calendar quarter returns during those years for the fund’s Investor Class. Returns for other share classes vary since they have different expenses. The following performance information provides some indication of the risks of investing in the fund. The following bar chart illustrates how much returns can differ from year to year by showing calendar year returns and the best and worst calendar quarter returns during those years for the fund’s Investor Class. Returns for other share classes vary since they have different expenses. The following table shows the average annual total returns for each class of the fund that has been in operation for at least one full calendar year. The fund’s performance information included in the table is compared with a regulatory required index that represents an overall securities market (Regulatory Benchmark). In addition, the table may also include one or more indexes that more closely aligns to the fund’s investment strategy (Strategy Benchmark(s)). The fund’s performance information represents only past performance (before and after taxes) and is not necessarily an indication of future results. Calendar Year Returns <table cellpadding="0" cellspacing="0" style="border-collapse:collapse" width="100%"><tr style="font-size:1pt;"><td style="width:9.02%;"> </td><td style="width:14.01%;"> </td><td style="width:14.99%;"> </td><td style="width:13%;"> </td><td style="width:.49%;"> </td><td style="width:14.99%;"> </td><td style="width:14.99%;"> </td><td style="width:13%;"> </td><td style="width:5.5%;"> </td></tr><tr><td style="vertical-align:top; font-size:1pt;"> </td><td style="vertical-align:top; font-size:1pt;"> </td><td style="vertical-align:top;">Quarter Ended</td><td style="vertical-align:top;">TotalReturn</td><td style="vertical-align:top; font-size:1pt;"> </td><td style="vertical-align:top; font-size:1pt;"> </td><td style="vertical-align:top;">Quarter Ended</td><td style="vertical-align:top;">Total Return</td><td style="vertical-align:top; font-size:1pt;"> </td></tr><tr><td style="vertical-align:top; font-size:1pt;"> </td><td style="vertical-align:top; background-color:#E6E6E6;">Best Quarter</td><td style="vertical-align:top; background-color:#E6E6E6;">6/30/20</td><td style="vertical-align:top; background-color:#E6E6E6;">30.86%</td><td style="vertical-align:top; font-size:1pt;"> </td><td style="vertical-align:top; background-color:#E6E6E6;">Worst Quarter</td><td style="vertical-align:top; background-color:#E6E6E6;">3/31/20</td><td style="vertical-align:top; background-color:#E6E6E6;">-21.41%</td><td style="vertical-align:top; font-size:1pt;"> </td></tr></table> Best Quarter 2020-06-30 0.3086 Worst Quarter 2020-03-31 -0.2141 The following table shows the average annual total returns for each class of the fund that has been in operation for at least one full calendar year. The fund’s performance information included in the table is compared with a regulatory required index that represents an overall securities market (Regulatory Benchmark). In addition, the table may also include one or more indexes that more closely aligns to the fund’s investment strategy (Strategy Benchmark(s)).In addition, the table shows hypothetical after-tax returns to demonstrate how taxes paid by a shareholder may influence returns. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as a 401(k) account or an IRA. After-tax returns are shown only for the Investor Class and will differ for other share classes. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as a 401(k) account or an IRA. After-tax returns are shown only for the Investor Class and will differ for other share classes. Average Annual Total Returns Periods ended December 31, 2024 2003-12-31 0.2373 0.1105 0.1193 0.2152 0.0944 0.1070 0.1580 0.0858 0.0965 2017-05-03 0.2395 0.1124 0.1327 Russell 3000® Index Russell 3000® Index (reflects no deduction for fees, expenses, or taxes) 0.2381 0.1386 0.1255 0.1379 Russell Midcap Growth Index (reflects no deduction for fees, expenses, or taxes) 0.2210 0.1147 0.1154 0.1309 Lipper Mid-Cap Growth Funds Index 0.1073 0.0738 0.0934 0.1016 Updated performance information is available through troweprice.com. troweprice.com 485BPOS 2024-12-31 0001267862 false 2025-02-25 2025-03-01 N-1A ~ http://troweprice.com/20241231/role/RRSchedule4 ~ ~ http://troweprice.com/20241231/role/RRSchedule5 ~ ~ http://troweprice.com/20241231/role/RRSchedule6 ~ ~ http://troweprice.com/20241231/role/RRBarChart7 ~ ~ http://troweprice.com/20241231/role/RRSchedule8 ~ 0.0206 0.075 0.2472 -0.0311 0.379 0.318 0.1374 -0.2463 0.2078 0.2373 ~ http://troweprice.com/20241231/role/RRSchedule9 ~ Subject to certain exceptions and account minimums, accounts are charged an annual $20 fee. Due to new SEC Rules on shareholder reporting, the fund adopted a new broad-based securities market index, referred to as the Regulatory Benchmark. Return since 5/3/17.