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

Rhea-AI Filing Summary

Barbour D. Scott, a director of Allison Transmission Holdings, Inc. (ALSN), reported a non-derivative acquisition on 08/29/2025 consisting of 4 dividend equivalent rights that accrue on previously awarded restricted stock units (RSUs) and vest proportionately with those RSUs. Each dividend equivalent right is described as the economic equivalent of one share of common stock. The report shows 4 underlying shares from the dividend equivalents and a total of 8 shares beneficially owned following the reported transaction, held in a direct ownership form. The Form 4 was signed by an attorney-in-fact on behalf of the reporting person on 09/03/2025.

Positive

• Disclosure of 4 dividend equivalent rights tied to RSUs provides transparency into insider compensation
• No cash purchase or sale reported, indicating this was an accrued payment rather than a trading event
• Beneficial ownership reported as direct, clarifying the reporting person’s holding status

Negative

• None.

Insights

Financial Analyst

TL;DR: Small, routine equity accrual tied to existing RSUs; immaterial to company valuation.

This Form 4 documents the accrual and acquisition of 4 dividend equivalent rights that vest with previously granted RSUs, each equal to one share economically. The transaction increases direct beneficial ownership to 8 shares. There is no cash consideration reported and no derivative exercise or sale activity disclosed. For investors, the item is routine insider compensation mechanics rather than a signal of trading intent or material ownership change.

Corporate Governance Expert

TL;DR: Routine disclosure of equity compensation-related accruals consistent with governance transparency requirements.

The filing aligns with Section 16 reporting: it discloses dividend equivalent rights tied to RSUs and reports the resulting direct beneficial ownership. The use of an attorney-in-fact signature is properly noted. No leadership changes, sales, or large transfers are reported, indicating standard post-grant vesting mechanics rather than governance concerns.

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^*

BARBOUR D. SCOTT

(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		4		(1)	(1)	Common Stock	4	$0	8	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, 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 ALSN director Barbour D. Scott acquire on 08/29/2025?

The filing shows acquisition of 4 dividend equivalent rights that accrue on previously awarded RSUs and vest proportionately with those RSUs.

How many shares does the Form 4 report Barbour D. Scott beneficially owning after the transaction?

The Form 4 reports a total of 8 shares beneficially owned following the reported transaction, held in direct form.

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

No cash price is reported; the dividend equivalent rights are noted with a $0 price, indicating an accrued issuance rather than a cash purchase.

Does this Form 4 show any sales or exercises by the reporting person?

No. The filing discloses an accrual/acquisition of dividend equivalent rights only; there are no sales or option exercises reported.

Who signed the Form 4 and when was it signed?

The Form 4 was signed by /s/ Preston B. Ray, attorney-in-fact on 09/03/2025.