Arcosa (NYSE: ACA) reports MSHA 107(a) mine safety order in Louisiana

Rhea-AI Filing Summary

Arcosa, Inc. reported a mine safety event at its Arcosa Aggregates Gulf Coast location in DeRidder, Louisiana. On December 11, 2025, the Mine Safety and Health Administration issued a section 107(a) order after a third party contractor was seen walking on top of a fuel tank without fall protection.

The order required removal of the contractor from the hazardous area and was terminated shortly after the contractor was safely brought down. No one was injured, and Arcosa states that it took immediate corrective action in response to the incident.

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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

Date of Report (Date of Earliest Event Reported): December 11, 2025

Arcosa, Inc.

__________________________________________

(Exact name of registrant as specified in its charter)

Delaware

1-38494

82-5339416

(State or other jurisdiction of incorporation)

(Commission File Number)

(I.R.S. Employer Identification No.)

500 N. Akard Street, Suite 400

Dallas,

Texas

75201

(Address of principal executive offices)

(Zip Code)

Registrant's telephone number, including area code: (972) 942-6500

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 each exchange on which registered
Common Stock ($0.01 par value)			ACA			New York Stock Exchange
Common Stock ($0.01 par value)			ACA			NYSE Texas, Inc.

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 1.04    Mine Safety.

On December 11, 2025, the Company received a section 107(a) order issued by the Mine Safety and Health Administration under the Federal Mine Safety and Health Act of 1977 at its Arcosa Aggregates Gulf Coast location in DeRidder, Louisiana. The order was issued to remove a third party contractor observed walking on top of a fuel tank without fall protection. The order was terminated shortly thereafter when the third party contractor was safely removed from the top of the fuel tank. No one was injured and the Company took immediate corrective action with respect to the incident.

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.

			Arcosa, Inc.
December 16, 2025			By:			/s/ Bryan P. Stevenson
						Name: Bryan P. Stevenson
						Title: Chief Legal Officer

FAQ

What mine safety event did Arcosa (ACA) disclose in this report?

Arcosa disclosed that on December 11, 2025, it received a section 107(a) order from the Mine Safety and Health Administration at its Arcosa Aggregates Gulf Coast location in DeRidder, Louisiana.

What caused the MSHA section 107(a) order at Arcosas facility?

The order was issued because a third party contractor was observed walking on top of a fuel tank without fall protection at the Arcosa Aggregates Gulf Coast site.

Was anyone injured in the Arcosa (ACA) mine safety incident?

No. Arcosa states that no one was injured in connection with the incident that led to the section 107(a) order.

How did Arcosa respond to the MSHA 107(a) order?

The order was terminated shortly after the third party contractor was safely removed from the fuel tank, and Arcosa reports that it took immediate corrective action regarding the incident.

Did the mine safety order involve Arcosa employees or third party contractors?

The section 107(a) order related to a third party contractor working at Arcosas Aggregates Gulf Coast location, not to an Arcosa employee.