ALSN insider files Form 144 to sell 3,943 shares

Allison Transmission Holdings Inc. filed a Form 144 reporting proposed sales of Common Stock totaling 3,943 shares tied to a 02/28/2026 vesting of performance share units under the issuer's equity compensation plan.

Rhea-AI Filing Summary

Allison Transmission Holdings Inc. filed a Form 144 reporting proposed sales of Common Stock totaling 3,943 shares tied to a 02/28/2026 vesting of performance share units under the issuer's equity compensation plan. The filing also reports a prior sale of 1,178 shares on 02/25/2026.

Insights

Insider Transactions Analyst

Routine Rule 144 notice for insider sales and recent disposition.

The filing lists 3,943 shares associated with a 02/28/2026 vesting event of performance share units and records a sale of 1,178 shares on 02/25/2026. This is a standard disclosure under resale rules.

Permitted sales under Rule 144 are common after vesting; subsequent trading will depend on the holder's actions and any applicable resale conditions. Future filings would show actual transaction timing and amounts.

FAQ

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

What does the ALSN Form 144 report say?

The Form 144 reports proposed sales of 3,943 shares tied to a 02/28/2026 vesting and a prior sale of 1,178 shares on 02/25/2026. It discloses timing and share counts for resale purposes.

Who is the issuer named on the Form 144 for ALSN?

The issuer is Allison Transmission Holdings Inc. The filing lists the securities as Common Stock and references vesting of performance share units under the company's equity compensation plan on 02/28/2026.

How many shares were sold recently by the reporting person?

The filing shows a sale of 1,178 shares on 02/25/2026. That transaction is listed in the "Securities Sold During The Past 3 Months" section of the Form 144 disclosure.

Are the 3,943 shares registered as a sale or from vesting?

The 3,943 shares are associated with vesting of performance share units on 02/28/2026, granted under the issuer's equity compensation plan, as stated in the filing's securities-to-be-sold section.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 03/05/2026 - 05:24 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001543604
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Allison Transmission Holdings Inc
SEC File Number	001-35456
Address of Issuer	ONE ALLISON WAY Indianapolis INDIANA 46222
Phone	(317) 242-5000
Name of Person for Whose Account the Securities are To Be Sold	Milburn Ryan A.
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common Stock	Merrill Lynch 225 Liberty Street Floor 37 New York NY 10281	3943	495043.65	82805592	03/05/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common Stock	02/28/2026	Vesting of performance share unit	Allison Transmission Holdings Inc			3943	02/28/2026	Granted as part of issuer equity compensation plan

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Ryan Milburn ONE ALLISON WAY Indianapolis IN 46222	Common Stock	02/25/2026	1178	144034.06

144: Remarks and Signature

Remarks
Date of Notice	03/05/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	02/19/2025
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	Ryan Milburn
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)