UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 5)*

Christopher & Banks Corporation

(Name of Issuer)

Common Stock, par value $0.01 per share

(Title of Class of Securities)

171046105

(CUSIP number)

Jonathan Duskin

c/o Macellum Capital Management, LLC

99 Hudson Street, 5th Floor

New York, New York 10013

(212) 956-3008

Jeffrey L. Kochian

Akin Gump Strauss Hauer & Feld LLP

One Bryant Park

New York, New York 10036

(212) 872-8069

(Name, address and telephone number of person authorized to receive notices and communications)

February 18, 2016

(Date of event which requires filing of this statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of Rule 13d-1(e), Rule 13d-1(f) or Rule 13d-1(g), check the following box.  ¨

Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See Rule 13d-7 for other parties to whom copies are to be sent.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

Amendment No. 5 to Schedule 13D

This Amendment No. 5 amends and supplements the Schedule 13D (the “Schedule 13D”) filed on behalf of Macellum Retail Opportunity Fund, LP (“Opportunity Fund”), Macellum Capital Management, LLC (“Macellum Capital Management”), Macellum Advisors GP, LLC (“Macellum GP”), Macellum Management, LP (“Macellum Management”), MCM Managers, LLC (“MCM Managers”), MCM Management, LLC (“MCM Management”) and Jonathan Duskin (“Mr. Duskin”, and together with Opportunity Fund, Macellum Capital Management, Macellum GP, Macellum Management, MCM Managers and MCM Management, the “Reporting Persons”) with the Securities and Exchange Commission (the “SEC”) on April 1, 2015, as amended by Amendment No. 1 on May 19, 2015, Amendment No. 2 on June 18, 2015, Amendment No. 3 on July 9, 2015, and Amendment No. 4 on January 25, 2016.

Information given in response to each item shall be deemed incorporated by reference in all other items, as applicable. All capitalized terms contained herein but not otherwise defined shall have the meanings ascribed to such terms in the Schedule 13D.

Item 3 of this Schedule 13D is hereby amended and restated in its entirety as follows:

The shares of Common Stock and options to purchase shares of Common Stock purchased by Opportunity Fund and the shares of Common Stock purchased by Macellum Capital Management were purchased with working capital (which may, at any given time, include margin loans made by brokerage firms in the ordinary course of business) in open market purchases through brokers. The purchase price of the 3,079,372 shares of Common Stock beneficially owned by Opportunity Fund, including the acquisition of 140,000 shares as a result of the exercise of options, plus the purchase price of the options to purchase 140,000 shares of Common Stock that have been exercised was approximately $11,675,594.99 in the aggregate, excluding brokerage commissions. The aggregate purchase price of the 52,133 shares of Common Stock beneficially owned by Macellum Capital Management was approximately $211,323.43, excluding brokerage commissions.

Item 4 of this Schedule 13D is supplemented and superseded, as the case may be, as follows:

This Amendment No. 5 is being filed to report the acquisition of shares of Common Stock reported in Item 5(c) that resulted in an acquisition of beneficial ownership of Common Stock in an amount equal to one percent or more of the Issuer’s outstanding Common Stock. The disclosure regarding the transactions reported in Item 5(c) below is incorporated herein by reference. The Reporting Persons may make, or cause, further acquisitions of shares of Common Stock from time to time and may dispose of, or cause to be disposed, any or all of the Common Stock beneficially owned by them at any time, in each case depending on market conditions and other factors.

The Reporting Persons continuously assess the Issuer’s business, financial condition, results of operations and prospects, general economic conditions, other developments and additional investment opportunities. Depending on such assessments, the Reporting Persons and/or their affiliates may acquire additional securities of the Issuer, including but not limited to Common Stock, existing preferred securities or new securities of the Issuer or may determine to purchase, sell or otherwise dispose of all or some of the Issuer’s securities in the open market, as applicable, in privately negotiated transactions, in transactions directly with the Issuer or otherwise. Such actions will depend upon a variety of factors, including, without limitation, current and anticipated future trading prices, the financial condition, results of operations and prospects of the Issuer, alternative investment opportunities, general economic, financial market and industry conditions and other factors that the Reporting Persons and/or their affiliates may deem material to their investment decision. Also, the Reporting Persons and/or their affiliates intend to have discussions with management regarding the operations of the Issuer and matters of mutual interest, which could include the items in subparagraphs (a) through (j) of Item 4 of Schedule 13D.

Furthermore, the Reporting Persons and/or their affiliates may in the future take such actions with respect to their investment in the Issuer as they deem appropriate, including, without limitation, engaging in communications with management and the Issuer’s Board of Directors (the “Board”), engaging in discussions with stockholders of the Issuer and others about the Issuer and the Reporting Persons’ investment, making proposals to the Issuer concerning changes to the capitalization, ownership structure, Board structure (including Board composition) or operations of the Issuer, or changing their intention with respect to any and all matters referred to in subparagraphs (a) through (j) of Item 4 of Schedule 13D.

Item 5 of this Schedule 13D is hereby amended and restated in its entirety as follows:

(a) and (b) Items 7 through 11 and 13 of each of the cover pages of this Schedule 13D are incorporated herein by reference. Such information is based on 37,236,842 shares of Common Stock outstanding as of December 4, 2015, as disclosed in the Issuer’s Form 10-Q filed with the SEC on December 8, 2015.

(c) Except for transactions previously reported in this Schedule 13D, as amended, the transactions by the Reporting Persons in the securities of the Issuer during the past sixty days are set forth in Exhibit 99.7, which is incorporated herein by reference.

(d) The disclosure regarding the relationship between the Reporting Persons in Item 2(c) of this Schedule 13D is incorporated by reference herein.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

February 19, 2016

Exhibit 99.7

Transactions in Securities of the Issuer During the Past Sixty Days

The following table sets forth all transactions with respect to shares of Common Stock effected in the last sixty days by any of the Reporting Persons or on behalf of any of the Reporting Persons, inclusive of any transactions effected through 4:00 p.m., New York City time, on February 18, 2016. All such transactions were purchases or sales of shares of Common Stock effected in the open market through brokers, and the table excludes commissions paid in per share prices.