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

Rhea-AI Filing Summary

Carolann Haznedar, a director of Allison Transmission Holdings, Inc. (ALSN), reported a non‑derivative acquisition on 08/29/2025 of 66 dividend equivalent rights that accrued on previously awarded deferred stock units (DSUs). Each dividend equivalent right is the economic equivalent of one share of common stock. The reported transaction had a price of $0 and increased Ms. Haznedar’s beneficial ownership to 1,378 shares, held directly. The Form 4 was signed by an attorney‑in‑fact on 09/03/2025. No exercise or conversion terms apply because this report covers dividend equivalent rights that vest with the underlying DSUs.

Positive

• Increased insider alignment via accrual of 66 dividend equivalent rights, raising direct beneficial ownership to 1,378 shares.
• Clear disclosure of the nature of the rights and post-transaction ownership, signed by an attorney‑in‑fact.

Negative

• None.

Insights

Corporate Governance Expert

TL;DR: Routine insider accrual and vesting of dividend equivalent rights increasing direct ownership modestly.

This Form 4 documents a non‑cash accrual related to previously granted deferred stock units. The 66 dividend equivalent rights reflect compensation mechanics rather than an open‑market purchase or sale, and they vest proportionately with the DSUs. Governance implications are minimal: the transaction is a standard compensation settlement and does not signal a material change in insider alignment or control. Disclosure is timely and includes ownership post-transaction.

Securities Analyst

TL;DR: Small increase in insider holdings from dividend equivalents; not material to valuation.

The report shows an addition of 66 economic shares at no cash price, bringing direct beneficial ownership to 1,378 shares. Because these are dividend equivalent rights tied to DSUs, they do not represent new capital invested by the insider or an open‑market signal. From an investor perspective this is a routine compensation-related adjustment with negligible impact on float or valuation.

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^*

HAZNEDAR CAROLANN I

(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)

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

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		66		(1)	(1)	Common Stock	66	$0	1,378	D

Explanation of Responses:

1. The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs 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, 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) director Carolann Haznedar report on Form 4?

She reported the acquisition of 66 dividend equivalent rights tied to previously awarded DSUs on 08/29/2025, increasing her direct beneficial ownership to 1,378 shares.

Were any shares purchased for cash in this Form 4 filing for ALSN?

No. The transaction shows a price of $0; the filing records dividend equivalent rights that accrued on DSUs rather than a cash purchase.

What are dividend equivalent rights in this filing?

The filing states each dividend equivalent right is the economic equivalent of one share of Allison Transmission common stock and vests proportionately with the related DSUs.

When was the Form 4 signed and who signed it?

The Form 4 was signed by Preston B. Ray as attorney‑in‑fact on 09/03/2025.