Allison Transmission (ALSN) director granted 57 Dividend Equivalent Rights

Rhea-AI Filing Summary

Altmaier Judy L reported acquisition or exercise transactions in this Form 4 filing.

Allison Transmission Holdings Inc director Judy L. Altmaier received a grant of 57 Dividend Equivalent Rights tied to previously awarded deferred stock units. Each right is economically equivalent to one share of common stock. Following this compensation-related award, she holds 1,434 Dividend Equivalent Rights directly.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Altmaier Judy L

Role null

Type	Security	Shares	Price	Value
Grant/Award	Dividend Equivalent Rights	57	$0.00	--

Holdings After Transaction: Dividend Equivalent Rights — 1,434 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

Dividend Equivalent Rights granted: 57 rights Total Dividend Equivalent Rights after grant: 1,434 rights Transaction price per right: $0.00 +1 more

4 metrics

Dividend Equivalent Rights granted 57 rights Grant on 2026-05-29 to director Judy L. Altmaier

Total Dividend Equivalent Rights after grant 1,434 rights Holdings following reported transaction

Transaction price per right $0.00 Compensation award, not an open-market purchase

Underlying common shares 57 shares Each right equals one share of common stock

Key Terms

Dividend Equivalent Rights, deferred stock units ("DSUs"), economic equivalent

3 terms

Dividend Equivalent Rights financial

"The dividend equivalent rights accrued on previously awarded deferred stock units"

Dividend equivalent rights are promises that mirror the cash payments shareholders get from a company’s profits, but they are paid to holders of certain awards (like stock options or restricted stock units) rather than to actual shares. Think of them as a paycheck top‑up that matches dividends while the award is not yet a real stock, and they matter to investors because they add to employee compensation costs and potential share dilution, affecting company profitability and per‑share value.

deferred stock units ("DSUs") financial

"The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs")"

economic equivalent financial

"Each dividend equivalent right is the economic equivalent of one share"

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Form 4 Insider Transactions: What Each Field Means →

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^*

Altmaier Judy L

(Last) (First) (Middle)

C/O ALLISON TRANSMISSION HOLDINGS, INC.

ONE ALLISON WAY

(Street)

INDIANAPOLIS INDIANA 46222

(City) (State) (Zip)

UNITED STATES

(Country)

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)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/29/2026

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
Dividend Equivalent Rights	(1)	05/29/2026		A		57		(1)	(1)	Common Stock	57	$0	1,434	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	06/02/2026
	** 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)

FAQ

What insider transaction did Allison Transmission (ALSN) report for Judy L. Altmaier?

Allison Transmission reported that director Judy L. Altmaier received 57 Dividend Equivalent Rights. These rights are compensation-linked and are economically equivalent to shares of common stock tied to earlier deferred stock unit awards.

How many Dividend Equivalent Rights does Judy L. Altmaier hold after this ALSN Form 4?

After the reported transaction, Judy L. Altmaier holds 1,434 Dividend Equivalent Rights directly. These rights are linked to deferred stock units and mirror the value of Allison Transmission common stock.

What are Dividend Equivalent Rights in the Allison Transmission (ALSN) Form 4?

Dividend Equivalent Rights are compensation instruments that accrue on deferred stock units and vest proportionately with them. Each right is the economic equivalent of one share of Allison Transmission common stock according to the filing footnote.

Was the Judy L. Altmaier ALSN transaction a market buy or sell of shares?

The transaction was not a market buy or sell. It was a grant of 57 Dividend Equivalent Rights as part of compensation, classified as a derivative award rather than an open-market stock trade.

What underlying security is associated with the Dividend Equivalent Rights in ALSN’s Form 4?

The Dividend Equivalent Rights reported for Judy L. Altmaier are linked to Allison Transmission common stock. Each right is economically equivalent to one share of this underlying common stock, tied to existing deferred stock units.