J.Jill, Inc.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

SCHEDULE 14A

(RULE

14a-101)

SCHEDULE 14A INFORMATION

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

Filed by the Registrant ☒

Filed by a party other than the Registrant ☐

Check the appropriate box:

J.Jill, Inc.

(Name of Registrant as Specified in its Charter)

N/A

(Name of Person(s) Filing Proxy Statement, if Other Than the Registrant)

Payment of Filing Fee (Check the appropriate box):

4 Batterymarch Park

Quincy Massachusetts,

NOTICE OF ANNUAL MEETING OF STOCKHOLDERS

TO BE HELD JUNE 6, 2024

To the Stockholders of J.Jill, Inc.:

Notice is hereby given that the Annual Meeting of Stockholders of J.Jill, Inc. (the “Company,” “J.Jill” or “we”) is to be held on Thursday, June 6, 2024 at 8:00 AM Eastern, to be held online athttps://web.lumiagm.com/298043967(the “Annual Meeting”). The Annual Meeting is called for the following purposes:

1. To elect one director to our Board of Directors (the “Board of Directors”), to serve as Class I director for a term of three years expiring at the Annual Meeting of Stockholders to be held in 2027 and until such director’s successor has been duly elected and qualified;

2. To ratify the appointment of Grant Thornton LLP (“Grant Thornton”) as our independent registered public accounting firm for the current fiscal year ending February 1, 2025; and

3. To consider and take action upon such other matters as may properly come before the meeting or any adjournment or postponement thereof.

These matters are more fully described in the Proxy Statement accompanying this Notice.

If you were a stockholder of record of J.Jill, Inc. common stock as of the close of business on April 9, 2024, you are entitled to receive this Notice and vote at the Annual Meeting and any adjournments or postponements thereof, provided that our Board of Directors may fix a new record date for an adjourned meeting. Our stock transfer books will not be closed. A list of the stockholders entitled to vote at the Annual Meeting may be examined at our principal executive offices in Quincy, Massachusetts during ordinary business hours or on a reasonably accessible electronic network as provided by applicable law in the 10-day period preceding the meeting for any purposes related to the meeting.

We are pleased to take advantage of the Securities and Exchange Commission (the “SEC”) rules that allow us to furnish these proxy materials (including an electronic Proxy Card for the meeting) and our 2023 Annual Report to Stockholders (including our Annual Report on Form 10-K for the fiscal year ended February 3, 2024 (“Fiscal Year 2023”)) to our stockholders via the Internet. On or about April 25, 2024, we will mail to our stockholders a Notice of Internet Availability of Proxy Materials containing instructions on how to access our Proxy Statement and 2023 Annual Report to Stockholders and how to vote. We believe that posting these materials on the Internet enables us to provide our stockholders with the information they need to vote more quickly, while lowering the cost and reducing the environmental impact of printing and delivering annual meeting materials.

You are cordially invited to attend the Annual Meeting, which will be conducted in a virtual-only format via a live audio webcast. We believe that this virtual format facilitates stockholder attendance, provides all stockholders a consistent experience, and allows for participation regardless of location. In order to be admitted

i to the virtual meeting website, you will need the 11-digit control number that accompanies your proxy materials and type the password “jjill2024” to log in to the meeting. The Annual Meeting will begin promptly at 8:00 AM Eastern. We encourage you to access the meeting 15 minutes prior to the start time (at 7:45 AM Eastern) allowing ample time to log in to the meeting webcast and test your computer audio system. If you encounter any difficulty accessing the Annual Meeting, please visit https:// go.lumiglobal.com/faqfor assistance.

Whether or not you expect to attend virtually, our Board of Directors respectfully requests that you vote your shares of common stock in the manner described in the Proxy Statement. You may revoke your proxy in the manner described in the Proxy Statement at any time before it has been voted at the Annual Meeting.

By Order of the Board of Directors of J.Jill, Inc.,

Claire Spofford

Chief Executive Officer, President and Director

Quincy, Massachusetts

Dated: April 12, 2024

IMPORTANT NOTICE REGARDING THE AVAILABILITY OF PROXY MATERIALS FOR THE ANNUAL MEETING TO BE HELD ON THURSDAY, JUNE 6, 2024 VIA AUDIO WEBCAST ONLY: J.Jill, Inc.’s Proxy Statement and Annual Report on Form 10-K for Fiscal Year 2023 are also available atwww.astproxyportal.com/ast/JJill.

ii

J.JILL, INC.

Proxy Statement

for the

Annual Meeting of Stockholders

To Be Held June 6, 2024