Form 8-K

8-K — CRA INTERNATIONAL, INC.

Accession: 0001104659-26-039161

Filed: 2026-04-02

Period: 2026-03-27

CIK: 0001053706

SIC: 8111 (SERVICES-LEGAL SERVICES)

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

Item: Regulation FD Disclosure

Item: Financial Statements and Exhibits

Documents

8-K — tm2610933d1_8k.htm (Primary)

EX-99.1 — EXHIBIT 99.1 (tm2610933d1_ex99-1.htm)

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UNITED STATES

SECURITIES

AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OF THE

SECURITIES EXCHANGE ACT OF 1934

Date of report (Date of

earliest event reported): March 27, 2026

CRA INTERNATIONAL, INC.

(Exact name of registrant as specified in its

charter)

Massachusetts

000-24049

04-2372210

(State or other jurisdiction

(Commission

(IRS employer

of incorporation)

file number)

identification no.)

200 Clarendon Street Boston, Massachusetts

02116

(Address of principal executive offices)

(Zip code)

Registrant's telephone number, including area code: (617) 425-3000

(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

Name of Each Exchange on Which Registered

Common Stock, no par value

CRAI

Nasdaq Global Select Market

Indicate by check mark whether the registrant is an emerging

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

Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ¨

If 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.

On March 27, 2026, William Concannon informed

the board of directors (the “Board”) of CRA International, Inc. (the “Company”) that he will be retiring

as a director of the Board effective as of the adjournment of the 2026 Annual Meeting of Shareholders (the “Annual Meeting”),

which is scheduled for July 16, 2026. Mr. Concannon’s notice of retirement was not due to any disagreement with the Company

relating to the Company’s operations, policies or practices. The Company thanks Mr. Concannon for his valuable contributions

over the past 26 years to the work of the Board.

Additionally, on April 1, 2026, the Board

appointed Christine Detrick to serve as independent Lead Director, effective as of July 16, 2026. The appointment of Ms. Detrick

as Lead Director is subject to her re-election to the Board at the Annual Meeting.

Item 7.01 Regulation FD Disclosure.

A copy of the Company’s press release announcing

Mr. Concannon’s retirement and Ms. Detrick’s appointment is attached as Exhibit 99.1 to this Current Report

on Form 8-K.

The information contained in Item 7.01 of this

report and Exhibit 99.1 attached hereto shall not be deemed “filed” for purposes of Section 18 of the Securities

Exchange Act of 1934 or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any

filing under the Securities Act of 1933 or the Securities Exchange Act of 1934, except as expressly set forth by specific reference in

such a filing.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits

Number

Title

99.1

Press release, dated April 2, 2026

104

Cover Page Interactive Data File (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.

CRA INTERNATIONAL, INC.

Dated: April 2, 2026

By:

/s/ Eric Nierenberg

Eric Nierenberg

Executive Vice President, Chief Financial Officer and Treasurer

EX-99.1 — EXHIBIT 99.1

EX-99.1

Filename: tm2610933d1_ex99-1.htm · Sequence: 2

Exhibit 99.1

Charles River Associates (CRA) Announces Appointment

of Director Christine Detrick as Lead Independent Director, Effective July 16, 2026

Lead Independent Director William Concannon

to Retire After 26 Years of Distinguished Service

BOSTON--(BUSINESS WIRE)—April 2, 2026-- Charles

River Associates (NASDAQ: CRAI), a worldwide leader in providing economic, financial, and management

consulting services, today announced that current Director Christine Detrick will assume the role of independent Lead Director

of the Board of Directors following the planned retirement of current independent Lead Director William Concannon. Mr. Concannon’s

retirement will take effect at CRA’s 2026 Annual Meeting of Shareholders, which is scheduled for July 16, 2026.

“We would like to thank Bill for his leadership, sound judgment,

and steadfast commitment to CRA's success as Lead Director over the past six years, and as a member of the Board for the past 26 years,”

said Paul Maleh, CRA’s Chairman of the Board, Chief Executive Officer and President. “Bill has provided a steady hand

through the various stages of our growth and prosperity, and for that we are deeply grateful. We are also pleased that Christine, with

her extensive governance experience, has agreed to serve as our next independent Lead Director.”

Mr. Concannon has served on CRA’s Board since 2000 and as

its Lead Director since 2020. He informed the Board of his decision to retire in order to spend more time with family and other activities.

Ms. Detrick has been a member of CRA’s Board since 2020 and currently serves as Chairperson of the Nominating and Corporate

Governance Committee. The appointment of Ms. Detrick as Lead Director is subject to her re-election to the Board at the 2026 Annual

Meeting of Shareholders.

About Charles River Associates (CRA)

Charles River Associates® is a leading global consulting firm specializing in economic, financial, and management

consulting services. CRA advises clients on economic and financial matters pertaining to litigation and regulatory proceedings, and

guides corporations through critical business strategy and performance-related issues. Since 1965, clients have engaged CRA for its unique

combination of functional expertise and industry knowledge, and for its objective solutions to complex problems. Headquartered in Boston,

CRA has offices throughout the world. Detailed information about Charles River Associates, a registered trade name of CRA International, Inc.,

is available at www.crai.com. Follow us on LinkedIn, Instagram, and Facebook.

Charles River Associates

media@crai.com

617-425-3315

Nicholas Manganaro

Sharon Merrill Advisors

CRAI@investorrelations.com

617-542-5300

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