[Form 4] ALLISON TRANSMISSION HOLDINGS, INC. Insider Trading Activity

Rhea-AI Filing Summary

Insider acquisition of dividend equivalent rights tied to RSUs. Allison Transmission Holdings insider Scott A. Mell, who serves as Chief Financial Officer and Treasurer, reported receiving 20 dividend equivalent rights on 08/29/2025. These rights accrued on previously awarded restricted stock units and vest proportionately with those RSUs; each dividend equivalent right represents the economic equivalent of one share of Allison common stock. After the reported transaction, the reporting person beneficially owned 36 dividend equivalent rights directly. The transaction shows a zero purchase price because these are allocation of dividend equivalents rather than a cash purchase.

Positive

• Increased alignment of executive compensation with shareholder outcomes through RSU-linked dividend equivalents
• Clear disclosure of the nature and amount (20 rights) and resulting total (36 rights), enhancing transparency

Negative

• None.

Insights

Securities Analyst

TL;DR: Non-cash accrual of dividend-equivalent rights increases the insider's economic exposure to company shares.

These dividend equivalent rights are non-cash compensation that track previously granted RSUs and vest on the same schedule. The acquisition of 20 rights, bringing total to 36, modestly increases the reporting person's share-equivalent exposure without affecting company cash flows. For investors, this is a routine equity-compensation event and not a cash buy or sale signal; its materiality is low unless tied to larger, ongoing insider compensation trends.

Corporate Governance Expert

TL;DR: Routine insider compensation disclosure; aligns executive pay with shareholder value via RSU-linked dividend equivalents.

The filing documents allocation of dividend equivalent rights that mirror RSU vesting. Such arrangements are common governance practice to preserve the economic value of held RSUs. The direct ownership form indicates no intermediary vehicle. This disclosure is governance-transparent and typical for executive compensation, with limited immediate impact on control or capital structure.

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).

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^*

Mell Scott A

(Last) (First) (Middle)

C/O ALLISON TRANSMISSION HOLDINGS, INC.

ONE ALLISON WAY

(Street)

INDIANAPOLIS IN 46222

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Allison Transmission Holdings Inc [ ALSN ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
08/29/2025

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
Dividend Equivalent Rights	(1)	08/29/2025		A		20		(1)	(1)	Common Stock	20	$0	36	D

Explanation of Responses:

1. The dividend equivalent rights accrued on previously awarded restricted stock units ("RSUs") and vest proportionately with the RSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

	/s/ Preston B. Ray, as attorney-in-fact	09/03/2025
	** 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 Allison Transmission (ALSN) insider Scott A. Mell report on Form 4?

The insider reported acquiring 20 dividend equivalent rights that accrued on previously awarded restricted stock units, increasing direct holdings to 36 as of the reported transaction.

When was the transaction for the dividend equivalent rights reported?

The transaction date reported on the Form 4 is 08/29/2025.

Did the insider pay cash for the dividend equivalent rights?

No. The Form 4 shows a $0 price, indicating these were non-cash accruals of dividend equivalents tied to RSUs.

What does one dividend equivalent right represent for ALSN RSUs?

Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock and vests proportionately with the related RSUs.

Is this transaction direct or indirect ownership?

The Form 4 lists the ownership form as Direct (D).