D. Scott Barbour - 06 May 2026 Form 4 Insider Report for Allison Transmission Holdings Inc (ALSN)

Reporting relationship: Director
Issuer ticker: ALSN
Reported as of: 06 May 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 08 May 2026, 16:00:11 UTC
Prior SEC filing: 24 Mar 2026
Next SEC filing: 21 May 2026
Source filing: View source filing
Reporting owner signature: /s/ Preston B. Ray, attorney-in-fact

Key filing fact

D. Scott Barbour filed Form 4 for Allison Transmission Holdings Inc (ALSN) on 08 May 2026.

Key facts

This page summarizes D. Scott Barbour's Form 4 filing for Allison Transmission Holdings Inc (ALSN).
5 reported transactions and 3 derivative rows are listed below.
Accepted by SEC: 08 May 2026, 16:00.

Change

Previous filing in this sequence was filed on 24 Mar 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001716232 Primary reporting owner

BARBOUR D. SCOTT

Relationship: Director
Address: C/O ALLISON TRANSMISSION HOLDINGS, INC., ONE ALLISON WAY, INDIANAPOLIS
Signature: /s/ Preston B. Ray, attorney-in-fact
Signature date: 08 May 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

ALSN transaction

Common Stock

Award

Transaction value
Shares: +92
Change %: +0.79%
Price: $0.000000^*
Shares after: 11,695
Date: 06 May 2026
Ownership: Direct
Footnotes: F1, F2

ALSN transaction

Common Stock

Options Exercise

Transaction value
Shares: +1,586
Change %: +14%
Price: $0.000000^*
Shares after: 13,281
Date: 06 May 2026
Ownership: Direct
Footnotes: F3, F4

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

ALSN transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value
Shares: -1,570
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 06 May 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 1,570
Exercise price
Footnotes: F5, F6

ALSN transaction Derivative

Dividend Equivalent Rights

Options Exercise

Transaction value
Shares: -16
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 06 May 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 16
Exercise price
Footnotes: F7, F8

ALSN transaction Derivative

Restricted Stock Units

Award

Transaction value
Shares: +1,503
Change %
Price: $0.000000^*
Shares after: 1,503
Date: 07 May 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 1,503
Exercise price
Footnotes: F5, F9, F10, F11

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 11 footnotes

Footnote F1

These shares represent a quarterly payment of the reporting person's annual retainer under the Allison Transmission Holdings, Inc. (the "Company") Eighth Amended and Restated Non-Employee Director Compensation Policy. The annual retainer is paid quarterly in arrears in cash or common stock at the reporting person's discretion.

Footnote F2

The number of shares of common stock received was calculated based on $127.70 which was the closing price of the Company's common stock on the date of grant.

Footnote F3

Settlement of restricted stock units ("RSUs") and related dividend equivalents.

Footnote F4

Includes 16 dividend equivalents.

Footnote F5

Each RSU represents a contingent right to receive one share of the Company's common stock.

Footnote F6

On May 8, 2025, the reporting person was granted 1,570 RSUs that vested on May 6, 2026.

Footnote F7

Each dividend equivalent right is the economic equivalent of one share of the Company's common stock.

Footnote F8

The dividend equivalent rights accrued on previously awarded RSUs and vested on May 6, 2026.

Footnote F9

The RSUs represent the reporting person's annual equity award under the Company's Ninth Amended and Restated Non-Employee Director Compensation Policy.

Footnote F10

The RSUs vest on the date of the next annual meeting of the stockholders of the Company. Unvested RSUs earn dividend equivalents when dividends are declared on the Company's common stock.

Footnote F11

The number of RSUs received was calculated based on $123.02, which was the closing price of the Company's common stock on the date of grant.