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Date of Report (Date of earliest event reported): January 21, 2026

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(Exact name of registrant as specified in its charter)

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Registrant’s telephone number, including area code: (516) 812-2000

(Former name or former address, if changed since last report)

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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:

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. ☐

(e) On January 21, 2026, the shareholders of MSC Industrial Direct Co., Inc. (the “Company”) approved Amendment No. 1 (the “Amendment”) to the Company’s Amended and Restated Associate Stock Purchase Plan (as amended, the “Plan”) to (i) increase the number of shares available for sale thereunder by 300,000 shares of the Company’s Class A common stock and (ii) extend the Plan’s term for an additional five years, through October 31, 2035.

A summary of the material terms of the Plan is set forth in “Approval of Amendment No. 1 to our Amended and Restated Associate Stock Purchase Plan (Proposal No. 4)” in the Company’s definitive proxy statement filed with the Securities and Exchange Commission on December 11, 2025, which summary is incorporated herein by reference.

The foregoing summary of the Amendment is not complete and qualified in its entirety by reference to the full terms of the Amendment, which is filed as Exhibit 10.1 to this Current Report on Form 8-K and incorporated herein by reference.

(a) On January 21, 2026, the Company held its 2026 Annual Meeting of Shareholders (the “Annual Meeting”).

(b) A brief description of the matters voted upon at the Annual Meeting and the results of the voting on such matters are set forth below. On all matters (including the election of directors) submitted to a vote of the Company’s shareholders, each holder of Class A Common Stock is entitled to one vote per share. Broker non-votes and abstentions are not considered votes cast at the Annual Meeting and are not counted for any purpose in determining whether a matter has been approved.

1.Election of directors:

Each of the nominees was elected by the Company’s shareholders to serve for a term of one year or until his or her successor is duly elected and qualified.

2.Ratification of the appointment of Ernst & Young LLP to serve as the Company’s independent registered public accounting firm for fiscal year 2026:

Proposal No. 2 was approved by the Company’s shareholders.

3.Advisory vote to approve the compensation of the Company’s named executive officers:

Proposal No. 3, an advisory vote, was approved by the Company’s shareholders.

4.Approval of Amendment No. 1 to the Company’s Amended and Restated Associate Stock Purchase Plan:

Proposal No. 4 was approved by the Company’s shareholders.

(d) Exhibits:

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.