Summary Prospectus by Investment Company (Form 497K)

Fund/Ticker

Fidelity® Mid-Cap Stock K6 Fund/FNKFX

Summary Prospectus

June 29, 2026

Before you invest, you may want to review the fund's prospectus, which contains more information about the fund and its risks. You can find the fund's prospectus, reports to shareholders, and other information about the fund (including the fund's SAI) online at fundresearch.fidelity.com/prospectus/sec. You can also get this information at no cost by calling 1-800-835-5095 or by sending an e-mail request to [email protected]. The fund's prospectus and SAI dated June 29, 2026 are incorporated herein by reference.

245 Summer Street, Boston, MA 02210

Fund Summary

Fund:

Fidelity® Mid-Cap Stock K6 Fund

Investment Objective

Fidelity® Mid-Cap Stock K6 Fund seeks long-term growth of capital.

Fee Table

The following table describes the fees and expenses that may be incurred when you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions, which are not reflected in the tables and examples below.

Shareholder fees

(fees paid directly from your investment)

None

Annual Operating Expenses

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

Management fee	0.45%
Distribution and/or Service (12b-1) fees	None
Other expenses	0.00%
Total annual operating expenses	0.45%

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 the 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. 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:

1 year	$	46
3 years	$	144
5 years	$	252
10 years	$	567

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. During the most recent fiscal year, the fund's portfolio turnover rate was 38% of the average value of its portfolio.

Principal Investment Strategies

The Adviser generally defines medium market capitalization companies as those whose market capitalization is similar to the market capitalization of companies in the Russell Midcap® Index or the S&P MidCap 400® Index.

Common stocks (including depositary receipts evidencing ownership of common stock) are a type of equity security that represents an ownership interest in an issuer.

Derivative instruments that provide investment exposure to the investments above or exposure to one or more market risk factors associated with such investments are included in the fund's 80% policy, consistent with the fund's investment policies and limitations with respect to investments in derivatives.

Principal Investment Risks

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 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.

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" 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.

"Value" stocks can perform differently from the market as a whole and other types of stocks and can continue to be undervalued by the market for long periods of time.

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

The following information is intended to help you understand the risks of investing in the fund.

The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and an additional index over various periods of time. The additional index has characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Past performance is not an indication of future performance.

Visit www.401k.com and log in for more recent performance information.

Year-by-Year Returns

					2020	2021	2022	2023	2024	2025
					11.27%	27.14%	-5.92%	11.56%	14.71%	11.07%

During the periods shown in the chart:	Returns	Quarter ended
Highest Quarter Return	21.55%	June 30, 2020
Lowest Quarter Return	-28.78%	March 31, 2020
Year-to-Date Return	4.31%	March 31, 2026

Average Annual Returns

For the periods ended December 31, 2025	Past 1 year	Past 5 years	Life of fund
Fidelity® Mid-Cap Stock K6 Fund	11.07%	11.20%	11.66%A
S&P MidCap 400® Index (reflects no deduction for fees, expenses, or taxes)	7.50%	9.12%	10.41%
S&P 500® Index (reflects no deduction for fees, expenses, or taxes)	17.88%	14.42%	15.84%

AFrom June 13, 2019.

Investment Adviser

Fidelity Management & Research Company LLC (FMR) (the Adviser) is the fund's manager. Other investment advisers serve as sub-advisers for the fund.

Portfolio Manager(s)

Daniel Sherwood (Portfolio Manager) has managed the fund since 2024.

Purchase and Sale of Shares

Shares generally are available only to certain employer-sponsored retirement plans. For this purpose, employer-sponsored retirement plans generally include profit sharing, 401(k), 403(b), 457(b), defined benefit, retiree health savings plans, and similar plans, but generally do not include: retail retirement or non-retirement accounts; Individual Retirement Accounts (IRAs) (such as traditional, Roth, SEP, SARSEP, and SIMPLE IRAs); Coverdell Education Savings Accounts; individual 403(b) accounts that are not part of an employer's 403(b) plan; plans investing through the Fidelity Advisor® 403(b) program; plans covering self-employed individuals and their employees (formerly Keogh/H.R. 10 plans); health savings accounts; or qualified tuition programs. Plan participants may purchase shares only if shares are eligible for sale and available through their plan.

You may buy or sell shares in various ways:

Internet

www.401k.com

Phone

For Individual Accounts (investing through a retirement plan sponsor or other institution), refer to your plan materials or contact that institution directly.

For Retirement Plan Level Accounts:

Corporate Clients 1-800-962-1375

"Not for Profit" Clients 1-800-343-0860

Mail

Redemptions: Fidelity Investments P.O. Box 770001 Cincinnati, OH 45277-0035

Overnight Express: Fidelity Investments 100 Crosby Parkway Covington, KY 41015

The price to buy one share is its net asset value per share (NAV). Shares will be bought at the NAV next calculated after an order is received in proper form.

The price to sell one share is its NAV. Shares will be sold at the NAV next calculated after an order is received in proper form.

The fund is open for business each day the New York Stock Exchange (NYSE) is open.

There is no purchase minimum for fund shares.

Tax Information

Distributions by the fund to tax-advantaged retirement plan accounts are not taxable currently (but you may be taxed later, upon withdrawal of your investment from such account).

Payments to Broker-Dealers and Other Financial Intermediaries

The fund, the Adviser, Fidelity Distributors Company LLC (FDC), and/or their affiliates may pay intermediaries, which may include banks, broker-dealers, retirement plan sponsors, administrators, or service-providers (who may be affiliated with the Adviser or FDC), for the sale of fund shares and related services. These payments may create a conflict of interest by influencing your intermediary and your investment professional to recommend the fund over another investment. Currently, the Board of Trustees of the fund has not authorized such payments for shares of the fund. Ask your investment professional or visit your intermediary's web site for more information.

Fidelity Distributors Company LLC (FDC) is a member of the Securities Investor Protection Corporation (SIPC). You may obtain information about SIPC, including the SIPC brochure, by visiting www.sipc.org or calling SIPC at 202-371-8300.

Fidelity, the Fidelity Investments Logo and all other Fidelity trademarks or service marks used herein are trademarks or service marks of FMR LLC. Any third-party marks that are used herein are trademarks or service marks of their respective owners. © 2026 FMR LLC. All rights reserved.

1.9893886.108

MCS-K6-SUM-0626