[Form 4] Arcosa, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Arcosa, Inc. (ACA) reporting person Antonio Carrillo, who serves as a director and as President & CEO, reported an acquisition on 09/30/2025 of 3 Arcosa Phantom Stock Units. Each phantom stock unit is economically equivalent to one share of Arcosa common stock and the units are payable in cash when the reporting person’s service ends. After the reported transaction, Mr. Carrillo directly beneficially owns 4,879 shares (or economic equivalents). The Form 4 was signed by Mark Elmore by power of attorney on 10/02/2025.

Positive

• Reporting of compensation accrual shows transparency in insider activity
• Phantom units are disclosed with settlement terms (cash on termination)

Negative

• None.

Insights

Corporate Governance Analyst

Small deferred compensation accrual recorded by CEO/director on 09/30/2025.

The filing shows the reporting person, Antonio Carrillo, accrued 3 Arcosa Phantom Stock Units under the company's deferred director-fee plan on 09/30/2025. These units are economic equivalents to common shares but settle in cash upon termination of service, so they do not immediately change share count or voting power.

This is a routine compensation-related entry rather than an open-market purchase or sale; it records earned but deferred compensation tied to the company's common stock value.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person^*

Carrillo Antonio

(Last) (First) (Middle)

500 N AKARD ST. SUITE 400

(Street)

DALLAS TX 75201

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Arcosa, Inc. [ ACA ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President & CEO

3. Date of Earliest Transaction (Month/Day/Year)
09/30/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Arcosa Phantom Stock Units	$0	09/30/2025		A		3		(1)	(1)	Common Stock	3	$93.71	4,879	D

Explanation of Responses:

1. The Arcosa Phantom Stock Units were accrued under the Arcosa, Inc. Deferred Plan for Director Fees. Each share of phantom stock units is the economic equivalent of one share of common stock. The phantom stock units settle in cash upon the reporting person's termination of services with Arcosa.

Remarks:

	/s/ Mark Elmore, by Power of Attorney	10/02/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did Arcosa insider Antonio Carrillo report on Form 4 (ACA)?

He reported acquisition of 3 Arcosa Phantom Stock Units on 09/30/2025 under the deferred plan.

How many shares does Antonio Carrillo beneficially own after the transaction?

The filing shows he beneficially owns 4,879 shares (directly) following the reported transaction.

Do the Arcosa Phantom Stock Units convert into shares?

Each phantom unit is the economic equivalent of one share, but the units settle in cash upon termination rather than issuing stock.

What was the reported price reference in the Form 4?

The Form 4 lists an underlying common stock price of $93.71 associated with the reported units.

Who signed the Form 4 and when?

The form was signed by Mark Elmore by power of attorney on 10/02/2025.