Form 8-K

8-K — Shake Shack Inc.

Accession: 0001104659-26-073466

Filed: 2026-06-12

Period: 2026-06-08

CIK: 0001620533

SIC: 5810 (RETAIL-EATING & DRINKING PLACES)

Item: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

Item: Financial Statements and Exhibits

Documents

8-K — tm2617735d1_8k.htm (Primary)

EX-10.1 — EXHIBIT 10.1 (tm2617735d1_ex10-1.htm)

EX-99.1 — EXHIBIT 99.1 (tm2617735d1_ex99-1.htm)

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UNITED

STATES

SECURITIES

AND EXCHANGE COMMISSION

Washington,

D.C. 20549

FORM

8-K

CURRENT

REPORT

Pursuant

to Section 13 or 15(d) of the Securities Exchange Act of 1934

June

8, 2026

Date

of Report (Date of earliest event reported)

SHAKE

SHACK INC.

(Exact

name of registrant as specified in its charter)

Delaware

001-36823

47-1941186

(State

or other jurisdiction of

incorporation

or organization)

(Commission

File

Number)

(IRS

Employer

Identification

No.)

225

Varick Street, Suite

301

New

York, New

York

10014

(Address

of principal executive offices)

(Zip

Code)

(646)

747-7200

(Registrant's

telephone number, including area code)

Not applicable

(Former

name or former address, if changed since last report)

Check

the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under

any of the following provisions:

Written

communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

Soliciting

material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

Pre-commencement

communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

Pre-commencement

communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities

registered pursuant to Section 12(b) of the Act:

Title

of Each class

Trading

symbol(s)

Name

of Exchange

on which registered

Class A

Common Stock,

par value $0.001

SHAK

New

York Stock Exchange

Indicate by check mark whether the registrant is

an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405 of this chapter) or Rule 12b-2

of the Securities Exchange Act of 1934 (17 CFR §240.12b-2 of this chapter).

Emerging growth

company ¨

an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying

with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

Item 5.02 Departure of Directors or Certain Officers; Election of

Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

The Board of Directors (the “Board”)

of Shake Shack Inc. (the “Company”), upon the recommendation of its Nominating and Corporate Governance Committee,

approved an increase to the size of the Board of the Company from eight to nine members and appointed Christiane Pendarvis to fill the

vacancy so created, effective as of July 2, 2026 (the “Effective Date”). Ms. Pendarvis will serve as a Class II

director and will stand for election at the Company’s 2029 Annual Meeting of Stockholders. The Board has determined that Ms. Pendarvis

is independent under the listing standards of the New York Stock Exchange and the Company’s Corporate Governance Guidelines. Ms. Pendarvis

will serve on the Nominating & Corporate Governance Committee of the Board.

Ms. Pendarvis has since October 2023

served as Co-CEO of PATTERN Beauty By Tracee Ellis Ross, where she is responsible for all aspects of the business in partnership with

the company’s founder, Ms. Ellis Ross. Ms. Pendarvis previously served as Co-President of Savage X Fenty from January 2020

to May 2023. Ms. Pendarvis has over 25 years of experience leading direct-to-consumer and omni-channel consumer businesses,

having held executive positions with top retailers and Fortune 500 companies including Victoria’s Secret, Aerie, Old Navy, Minted

and FullBeauty Brands.

Ms. Pendarvis currently serves on the board

of directors of Hootsuite, and was previously on the boards of Hims & Hers and Savage X Fenty. Ms. Pendarvis also serves

on the Southern California Public Radio Board of Trustees and the Women of Color Retail Alliance Board. Ms. Pendarvis was named

one of Women’s Wear Daily’s Most Inspirational Women Leaders in 2023 and one of its 50 Women in Power in 2022.

Ms. Pendarvis received her BA in economics

from Harvard University and her MBA from the Kenan-Flagler Business School at the University of North Carolina.

As of the Effective Date, Ms. Pendarvis is

eligible to receive compensation for her service on the Board consistent with that provided to all non-employee directors, as described

in the Company’s definitive proxy statement on Schedule 14A filed with the Securities Exchange Commission (“SEC”).

There is no arrangement or understanding between

Ms. Pendarvis and any other persons or entities pursuant to which Ms. Pendarvis was appointed as a director. There have been

no transactions, nor are there any currently proposed transactions, in which the Company was or is to be a participant and which Ms. Pendarvis,

or any member of her immediate family, had, or will have, a direct or indirect material interest.

A copy of the letter agreement between Ms. Pendarvis

and the Company with respect to her service as a director is filed as Exhibit 10.1 to this current report on Form 8-K. In addition,

Ms. Pendarvis will execute the Company’s form of indemnification agreement, a copy of which has been filed as Exhibit 10.21

to the Company’s Registration Statement on Form S-1 filed with the SEC on January 20, 2015.

A copy of the press release with the announcement of the appointment

of Ms. Pendarvis to the Board is attached as Exhibit 99.1 to this current report on Form 8-K and incorporated herein.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits

Exhibit

Number

Exhibit Description

10.1

Letter Agreement, dated June 9,

2026, between Christiane Pendarvis and Shake Shack Inc.

99.1

Press Release, dated June 12,

2026, announcing appointment of Christiane Pendarvis to the Board of Directors of Shake Shack Inc.

104

Cover Page Interactive Data File - the cover page XBRL

tags are embedded within the Inline XBRL document

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934,

the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Shake Shack Inc.

(Registrant)

By:

/s/

Ronald Palmese, Jr.

Date: June 12, 2026

Chief Legal Officer

EX-10.1 — EXHIBIT 10.1

EX-10.1

Filename: tm2617735d1_ex10-1.htm · Sequence: 2

Exhibit 10.1

June 8, 2026

Dear Christiane:

This Director Offer Letter

sets forth the terms and conditions of your appointment to serve as a director (“Director”) on the board of directors

(the “Board”) of Shake Shack Inc. (the “Company”) and to serve as a member of the Nominating &

Corporate Governance Committee of the Board (the “Committee”), effective as of July 2, 2026 (the “Effective

Date”).

As a Director, you will be

expected to attend at least four (4) Board and four (4) Committee meetings each service year1 and shall have such

other duties and responsibilities as are customarily associated with this position. You will serve on the Board until such time that

either you or the Company terminates your service or unless you are not re-elected to the Board at the Annual General Meeting of Stockholders

in June 2029.

As consideration for your

service on the Board and the Committee, you will be eligible to receive annual cash compensation in the amount of Eighty Thousand Dollars

($80,000) and an annual equity award valued at One Hundred Forty Thousand Dollars ($140,000) each service year, totaling Two Hundred

Twenty Thousand Dollars ($220,000). You may elect (i) to receive additional equity in lieu of some or all of the cash portion of

your compensation and/or (ii) to defer the vesting of the equity portion of your compensation.

Notwithstanding the above,

for the current service year, your (i) cash compensation will be Sixty Thousand Dollars ($60,000) and (ii) equity award value

will be One Hundred and Twenty-Eight Thousand and Three Hundred and Thirty-Three Dollars and Thirty-Three Cents ($128,333.33), which

reflects eleven-twelfths of the annual director equity award that is otherwise awarded in June.

You will also be entitled

to coverage under the Company’s directors and officers liability insurance policy.

During your tenure as a Director,

you will at all times and for all purposes be acting as an independent contractor and not as an employee of the Company. Accordingly,

you will not be eligible to participate in employee benefit plans provided by the Company to its employees and the Company will not,

on your account, (i) pay any unemployment tax or other taxes required under the law to be paid with respect to employees or (ii) withhold

any monies from any compensation paid to you for income or employment tax purposes. Director compensation is established by the Board

and so, notwithstanding this letter, it may be revised at any time and from time to time.

Following your receipt of

this Director Offer Letter, you will receive from Ron Palmese, Chief Legal Officer, a number of documents to review and/or complete,

which are set forth in Schedule 1 hereto. You will also receive onboarding materials, which will include among other things, key dates

and board and management profiles. Mr. Palmese will be your primary contact in the weeks ahead; if you have any questions once you

receive them, please do not hesitate to reach out to him.

Please confirm that the foregoing

reflects your understanding by signing and returning this letter to me, with a copy to Mr. Palmese. We are glad to have you aboard

and look forward to working together. Please feel free to contact me should you wish to discuss any aspect of your service on the Company’s

Board.

Sincerely,

/s/

Daniel Meyer

Daniel

H. Meyer, Chairman

Accepted &

Agreed:

/s/Christiane

Pendarivs

Christiane

Pendarvis

Date:

June 9, 2026

1 Each service year runs from the start of Q2 in a given

year through the end of Q1 in the following year.

Schedule 1

New Director Documents

Documentation

Action

Requested

Director

Offer Letter

Review

and complete by June 10, 2026

NDA

Review

and complete by June 10, 2026

Director

Questionnaire

Review

and complete by June 10, 2026

Investments

and Directorships Questionnaire

Review

and complete by June 10, 2026

E&Y

Questionnaire

Review

and complete by June 10, 2026

Section 16

Filer POA

Review

and complete by June 24, 2026

Provide

EDGAR Filing Codes

Provide

by June 24, 2026

Compensation

Election Cover Letter

Review

by July 2, 2026

Compensation

Election Form

Review

and complete by July 2, 2026

RSU

Settlement Deferral Cover Letter

Review

by July 2, 2026

RSU

Settlement Deferral Election Form

Review

and complete by July 2, 2026

Indemnification

Agreement

Review

and complete by July 2, 2026

Headshot

Provide

by July 2, 2026

W-9

Complete

by July 2, 2026

EX-99.1 — EXHIBIT 99.1

EX-99.1

Filename: tm2617735d1_ex99-1.htm · Sequence: 3

Exhibit 99.1

Shake Shack Appoints

Christiane Pendarvis to Board of Directors

Growth-oriented retail

leader brings more than 25 years of experience at consumer brands

NEW YORK, JUNE 12, 2026 -- Shake Shack Inc. ("Shake

Shack" or the "Company") (NYSE: SHAK) today announced the election of retail industry veteran Christiane Pendarvis to

its Board of Directors, effective July 2.

Ms. Pendarvis is a seasoned executive with more

than 25 years of experience driving growth across direct-to-consumer and omnichannel businesses. She has held leadership roles at both

high-growth retail brands and Fortune 500 concepts with a focus on general management and retail merchandising. Ms. Pendarvis has extensive

experience with strategic planning, development, digital commerce and retail operations, as well as large-scale technology infrastructure

projects.

“We are pleased to welcome Christiane to

the Board,” said Founder and Chairman Danny Meyer. “Beyond having a clear alignment with our values and strategic vision,

her proven track record of driving profitable growth and building iconic consumer brands - combined with her deep expertise in retail

and digital commerce - will be invaluable as we continue to expand Shake Shack and deepen our connection with guests across all channels.

I’m confident that Christiane will be an excellent addition to our team.”

Ms. Pendarvis currently serves as Co-CEO of PATTERN

Beauty by Tracee Ellis Ross, where she is responsible for all aspects of the business in partnership with the Company’s founder

and namesake, actor Tracee Ellis Ross. She previously served as Co-President of Savage X Fenty, where she grew the company significantly,

including expanding the brand into new product categories and adding a physical retail channel. Ms. Pendarvis has also served in executive

roles with top-tier retail and DTC companies, such as Victoria’s Secret, Aerie, Old Navy, Minted, and FullBeauty Brands.

“Shake Shack is at a significant point

in its growth journey, and Christiane’s experience and perspective will be a strong asset to our Board,” said Rob Lynch,

CEO of Shake Shack. “She understands how to build brands, connect with consumers and scale with intention, all of which align with

our long-term growth plans.”

Ms. Pendarvis currently serves as a Board member

for Hootsuite and previously was on the Boards of Hims & Hers and Savage X Fenty. She also serves on the Southern California Public

Radio Board of Trustees and the Women of Color Retail Alliance Board. A recognized industry leader, she received Harlem’s Fashion

Row’s Corporate Impact Award and the NRF Foundation’s People Shaping Retail’s Future Award in 2025. She was named one

of WWD’s Most Inspirational Women Leaders in 2023 and one of its 50 Women in Power in 2022.

“I’m honored to join Shake Shack’s

Board of Directors at such an exciting time for the company,” said Ms. Pendarvis. “Shake Shack has earned a unique place

in culture by pairing exceptional experiences with a relentless focus on quality, community and hospitality. I’m excited to work

alongside the Board and leadership team as they continue to grow the brand, strengthen guest connections, and create long-term value

for all stakeholders.”

Ms. Pendarvis earned a bachelor’s degree

in economics from Harvard University and an MBA from the Kenan-Flagler Business School at the University of North Carolina.

Cautionary Note on Forward-Looking Statements

This press release may contain forward-looking statements, including

statements regarding the Company's Board of Directors and future growth and strategic initiatives, and other statements that are not

statements of historical facts. These forward-looking statements are subject to risks and uncertainties that could cause actual results

to differ materially from those expressed or implied by such statements. You should evaluate any forward-looking statements made in this

press release in the context of the risks and uncertainties disclosed in the Company’s Annual Report on Form 10-K for the fiscal

year ended December 31, 2025, the Company’s subsequent Quarterly Reports on Form 10-Q, and the Company's other SEC filings. All

of the Company's SEC filings are available online at www.sec.gov, investor.shakeshack.com or upon request from Shake Shack Inc. The Company

undertakes no obligation to publicly update or revise any forward-looking statement as a result of new information, future events or

otherwise, except as otherwise required by law.

About Shake Shack

Shake Shack serves elevated versions of American

classics using only the best ingredients. It’s known for its delicious made-to-order Angus beef burgers, crispy chicken, hand-spun

milkshakes, house-made lemonades, beer, wine, and more. With its high-quality food at a great value, warm hospitality, and a commitment

to crafting uplifting experiences, Shake Shack quickly became a cult-brand with widespread appeal. Shake Shack’s purpose is to

Stand For Something Good®, from its premium ingredients and employee development to its inspiring designs and deep community investment.

Since the original Shack opened in 2004 in NYC’s Madison Square Park, the Company has expanded to over 695 locations system-wide,

including over 450 in 35 U.S. States and the District of Columbia, and over 245 international locations across London, Hong Kong, Shanghai,

Singapore, Mexico City, Istanbul, Dubai, Tokyo, Seoul and more.

Skip the line with the Shack App, a mobile ordering

app that lets you save time by ordering ahead! Guests can select their location, pick their food, choose a pickup time and their meal

will be cooked-to-order and timed to arrival. Available on iOS and Android.

Learn more: shakeshack.com | IG: @shakeshack

| X: @shakeshack | facebook.com/shakeshack

Media:

Meg Davis, Shake Shack

mcastranova@shakeshack.com

Investor Relations:

Alison Sternberg, Shake Shack

Head of Investor Relations

(844) SHACK-04 (844-742-2504)

investor@shakeshack.com

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