11.30 Fidelity Flex Mid Cap Growth Fund PRO-03 | Fidelity Flex℠ Mid Cap Growth Fund

Fund Summary

Fund:
Fidelity Flex℠ Mid Cap Growth Fund

Investment Objective

The fund seeks long-term growth of capital.

Fee Table

The following table describes the fees and expenses that may be incurred when you buy and hold shares of the fund.

Shareholder fees

Shareholder Fees {- Fidelity Flex℠ Mid Cap Growth Fund}	11.30 Fidelity Flex Mid Cap Growth Fund PRO-03 Fidelity Flex℠ Mid Cap Growth Fund USD ($)
(fees paid directly from your investment)	none

Annual Operating Expenses

(expenses that you pay each year as a % of the value of your investment)

Annual Operating Expenses {- Fidelity Flex℠ Mid Cap Growth Fund}	11.30 Fidelity Flex Mid Cap Growth Fund PRO-03 Fidelity Flex℠ Mid Cap Growth Fund Fidelity Flex Mid Cap Growth Fund-Default
Management fee	none
Distribution and/or Service (12b-1) fees	none
Other expenses	none
Total annual operating expenses	none	[1]

This example helps compare the cost of investing in the fund with the cost of investing in other funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. This example does not include any fees paid at the fee-based account or plan level. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated:

Sell All Shares

Expense Example {- Fidelity Flex℠ Mid Cap Growth Fund}	11.30 Fidelity Flex Mid Cap Growth Fund PRO-03 Fidelity Flex℠ Mid Cap Growth Fund Fidelity Flex Mid Cap Growth Fund-Default USD ($)
1 year	none
3 years	none
5 years	none
10 years	none

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 fund shares are held in a taxable account. These costs, which are not reflected in annual operating expenses or in the example, affect the fund's performance. For the period from March 8, 2017 to November 30, 2017, the fund's portfolio turnover rate was 38% (annualized) of the average value of its portfolio.

Principal Investment Strategies

• Normally investing primarily in common stocks.

• Normally investing at least 80% of assets in securities of companies with medium market capitalizations (which, for purposes of this fund, are those companies with market capitalizations similar to companies in the Russell Midcap^® Index or the S&P MidCap 400^® Index).

• Investing in companies that Fidelity Management & Research Company (FMR) believes offer the potential for accelerated earnings or revenue growth (stocks of these companies are often called "growth" stocks).

• Potentially investing in companies with smaller or larger market capitalizations.

• Investing in domestic and foreign issuers.

• Using fundamental analysis of factors such as each issuer's financial condition and industry position, as well as market and economic conditions, to select investments.

Principal Investment Risks

• Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments.

• Foreign Exposure. Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market.

• Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. The value of securities of smaller issuers can be more volatile than that of larger issuers.

• "Growth" Investing. "Growth" stocks can perform differently from the market as a whole and other types of stocks and can be more volatile than other types of stocks.

• Mid Cap Investing. The value of securities of medium size, less well-known issuers can perform differently from the market as a whole and other types of stocks and can be more volatile than that of larger issuers.

An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. You could lose money by investing in the fund.

Performance

Performance history will be available for the fund after the fund has been in operation for one calendar year.

[1] The fund is available only to certain fee-based accounts offered by Fidelity. Managed account clients, retirement plans, plan sponsors and/or plan participants pay a wrap fee that covers investment advisory and administrative services.