Trinity director granted 4,024 stock units

Lakkundi Veena M reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Lakkundi Veena M reported acquisition or exercise transactions in this Form 4 filing.

TRINITY INDUSTRIES INC director Veena M. Lakkundi received a new equity award in the form of 4,024 Trinity Stock Units. These units are restricted stock units granted at a price of $0.00 per unit under the company's Fifth Amended and Restated 2004 Stock Option and Incentive Plan.

The award represents 4,024 underlying shares of common stock and brings Lakkundi's reported holdings of these units to 4,024. The units vest at the first annual stockholders meeting following the grant date and are payable one-for-one in Trinity common stock after the director's termination of service.

Insider Trade Summary

Grant/Award: 4,024 shares

Grant/Award 1 txn

Insider Lakkundi Veena M

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Trinity Stock Units	4,024	$0.00	$0.00

Holdings After Transaction: Trinity Stock Units — 4,024 contracts (Direct)

Footnotes (1)

1. F1. Restricted Stock Units granted pursuant to the Fifth Amended and Restated Trinity Industries, Inc. 2004 Stock Option and Incentive Plan. Distribution is 1 for 1 in Trinity Stock after Director's termination. Units vest upon the first annual stockholders meeting following the Date of Grant.

Key Figures

Restricted stock units granted: 4,024 units Grant price per unit: $0.00 per unit Units held after grant: 4,024 units +1 more

4 metrics

Restricted stock units granted 4,024 units Trinity Stock Units granted on May 21, 2026

Grant price per unit $0.00 per unit Trinity Stock Units award price

Units held after grant 4,024 units Total Trinity Stock Units following transaction

Underlying common shares 4,024 shares Common Stock underlying granted units

Key Terms

Restricted Stock Units, Trinity Stock Units, Stock Option and Incentive Plan, vest

4 terms

Restricted Stock Units financial

"Restricted Stock Units granted pursuant to the Fifth Amended and Restated Trinity Industries, Inc. 2004 Stock Option and Incentive Plan."

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

Trinity Stock Units financial

"security_title: Trinity Stock Units, underlying_security_title: Common Stock"

Stock Option and Incentive Plan financial

"granted pursuant to the Fifth Amended and Restated Trinity Industries, Inc. 2004 Stock Option and Incentive Plan."

vest financial

"Units vest upon the first annual stockholders meeting following the Date of Grant."

A vest is the process by which an employee earns the right to receive certain benefits or ownership interests, such as stock or retirement funds, over time. It’s similar to earning a reward gradually, ensuring that the benefit becomes fully yours only after a set period or meeting specific conditions. This makes it important for investors because it determines when they can actually claim or use those benefits.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did TRINITY INDUSTRIES INC (TRN) director Veena Lakkundi report on this Form 4?

Director Veena M. Lakkundi reported receiving a grant of 4,024 Trinity Stock Units. These are restricted stock units tied to common shares and were awarded as equity compensation under the company’s stock option and incentive plan at a grant price of $0.00 per unit.

How many Trinity Stock Units were granted to the TRN director in this filing?

The filing shows a grant of 4,024 Trinity Stock Units to the director. Each unit represents one underlying share of Trinity common stock, bringing the director’s reported balance in these units to 4,024 following the transaction on May 21, 2026.

What is the exercise or conversion price for the Trinity Stock Units granted to the TRN director?

The Trinity Stock Units were granted with a conversion price of $0.00 per unit. This reflects that they are restricted stock units, awarded as compensation rather than purchased in the market, and convert into common shares on the stated distribution terms in the plan.

When do Veena Lakkundi’s Trinity restricted stock units vest according to the Form 4?

The units vest upon the first annual stockholders meeting following the date of grant. This means the director’s right to the Trinity Stock Units becomes non-forfeitable at that meeting, subject to the plan’s terms, before eventual distribution in shares after termination of board service.

When will the TRN director receive Trinity common stock from these stock units?

Distribution of the 4,024 Trinity Stock Units occurs on a one-for-one basis in Trinity stock after the director’s termination of service. The footnote explains that each vested unit later converts into one share of common stock upon this termination event.

Under which equity plan were the Trinity Stock Units granted to the director?

The restricted stock units were granted under the Fifth Amended and Restated Trinity Industries, Inc. 2004 Stock Option and Incentive Plan. This plan governs the terms of equity awards to directors and other participants, including vesting conditions and distribution mechanics.

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Accepted by SEC EDGAR 05/26/2026 - 05:02 PM Learn about SEC filing dates

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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Lakkundi Veena M

(Last) (First) (Middle)

14221 N DALLAS PARKWAY

SUITE 1100

(Street)

DALLAS TEXAS 75254

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
TRINITY INDUSTRIES INC [ NYSE/TRN ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/21/2026

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

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

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

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
Trinity Stock Units	$0	05/21/2026		A		4,024		(1)	(1)	Common Stock	4,024	$0	4,024	D

Explanation of Responses:

1. Restricted Stock Units granted pursuant to the Fifth Amended and Restated Trinity Industries, Inc. 2004 Stock Option and Incentive Plan. Distribution is 1 for 1 in Trinity Stock after Director's termination. Units vest upon the first annual stockholders meeting following the Date of Grant.

Remarks:

	Phillip M. Kim For: Veena M Lakkundi	05/26/2026
	** 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.
* Form 4: SEC 1474 (03-26)