Allison files Rule 144 notice for two share actions

Rhea-AI Filing Summary

Allison Transmission Holdings Inc. submitted a Rule 144 notice reporting two planned equity events: 993 shares from vesting restricted stock unit awards on 04/14/2026 and 1,337 shares disposed via an employee option exercise and broker-assisted cashless sale on 05/08/2026

Insights

Compliance Counsel

Routine Rule 144 notice documenting affiliate share dispositions.

The filing lists a vesting of 993 restricted stock units on 04/14/2026 and an exercise-and-cashless sale of 1,337 shares on 05/08/2026. It records the method for the latter as a broker-assisted cashless sale.

These items are routine affiliate disclosures required under Rule 144; cashflow recipients and further proceeds treatment are not described in the excerpt.

Key Figures

RSUs vested: 993 shares Shares sold: 1,337 shares Exchange: NYSE

3 metrics

RSUs vested 993 shares Vesting of restricted stock unit awards on 04/14/2026

Shares sold 1,337 shares Exercise of employee stock options and broker-assisted cashless sale on 05/08/2026

Exchange NYSE Security listing stated in the excerpt

Key Terms

restricted stock unit awards, broker assisted cashless sale, Rule 144 notice

3 terms

restricted stock unit awards financial

"Vesting of restricted stock unit awards on 04/14/2026"

Restricted stock unit awards are company promises to deliver a specific number of shares to employees or service providers in the future once conditions—such as staying with the company for a set time or meeting performance targets—are met. They matter to investors because when the promises convert into actual shares they increase the total share count and can reduce earnings per share, while also aligning recipients’ interests with stock performance much like deferred pay that turns into ownership if goals are met.

broker assisted cashless sale financial

"Exercise of employee stock options ... Broker assisted cashless sale"

Rule 144 notice regulatory

"144: Securities To Be Sold"

A Rule 144 notice is a public filing that an insider or holder of restricted stock submits when they plan to sell shares that aren’t freely tradable yet; it lists how many shares they intend to sell and under what conditions. For investors, it matters because it signals potential insider selling and an upcoming increase in shares available to the market—similar to someone announcing a big garage sale, which can affect supply and price expectations.

FAQ

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

What transactions does Allison (ALSN) disclose in this Form 144?

The filing discloses two actions: 993 shares from RSU vesting on 04/14/2026 and 1,337 shares from an option exercise followed by a broker-assisted cashless sale on 05/08/2026

How many restricted stock units vested for ALSN in this filing?

The filing shows 993 restricted stock units vested on 04/14/2026. The entry is labeled as granted under the issuer's equity compensation plan.

What method was used to sell shares after the option exercise for ALSN?

The filing states the 1,337 shares from an employee option exercise on 05/08/2026 were sold via a broker-assisted cashless sale, as recorded in the transaction line.

Are these transactions reported as NYSE-listed securities for ALSN?

Yes. The securities are listed as Common Stock on the NYSE, with the sale lines tied to dates 04/14/2026 and 05/08/2026

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

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Accepted by SEC EDGAR 05/08/2026 - 04:34 PM EDT 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	0001860129
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	Mell Scott 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	2330	167125.00	82935981	05/08/2026	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	04/14/2026	Vesting of restricted stock unit awards	Allison Transmission Holdings Inc			993	04/14/2026	Granted as part of issuer equity compensation plan
Common Stock	05/08/2026	Exercise of employee stock options	Allison Transmission Holdings Inc			1337	05/08/2026	Broker assisted cashless sale

* 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

Nothing to Report

144: Remarks and Signature

Remarks
Date of Notice	05/08/2026
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	Scott Mell
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)