Allison Transmission Holdings Inc (ALSN) insider trading
Recent insider transactions reported to the SEC on Form 4 — directors and officers buying or selling their own company’s stock. Sourced directly from public SEC filings, latest filed Sep 2, 2026.
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- Filings shown
- 16
- Open-market buys
- 0
- Open-market sells
- 5
Counts cover the 16 most recent Form 4 filings Tradune holds for ALSN (filed Aug 11 – Sep 2, 2026). No completed check of ALSN's Form 4 list on SEC EDGAR is on record yet; the latest ALSN filing Tradune holds was filed Sep 2, 2026. This is not guaranteed to be the complete record — see ALSN's full Form 4 filing history on SEC EDGAR.
Open-market activity, last 90 days
Purchases (Form 4 code P) and sales (code S) on the 16 filings Tradune holds for ALSN filed Aug 11 – Sep 2, 2026. Grants, exercises, tax withholding and the other Form 4 transaction codes are left out.
5 open-market sales by Rule 10b5-1 checkbox
- On filings with the 10b5-1 box checked
- 0 sales· 0 sh
- checkbox disclosed
- On filings with the box not checked
- 5 sales· 31,719 sh
- not proof that no plan exists
- Not comparable
- 0 sales· 0 sh
- filed before Apr 1, 2023, or no checkbox value in the filing data
Counts are Form 4 lines as filed. The checkbox is one per filing, so every sale on a filing with the box checked is counted there even if only some of its transactions were under a plan; it records what the filer disclosed, and the three categories are not a judgement about why a sale was made.
| Insider | Buys | Sells | Shares bought | Shares sold | Value |
|---|---|---|---|---|---|
| David S. GraziosiChair, President and CEO | 0 | 3 | — | 26,708 | −$3,551,470 |
| G. Frederick BohleyOfficer (see filing) | 0 | 1 | — | 3,961 | −$484,748 |
| Eric C. ScrogginsCLO & Asst. Secretary | 0 | 1 | — | 1,050 | −$131,250 |
Value = shares × the price reported on each Form 4 (+ purchases, − sales); every open-market line in this window disclosed a price.
Summarises ~90 days of public SEC Form 4 activity — more distinct buyers, officer involvement and net buying score higher. A description of filing activity, not a rating or buy signal. How this score is computed →
How to read this: an open-market purchase (Form 4 code P) is a buy at the market price with the insider’s own money, as opposed to a grant, award or option exercise; an open-market sale is code S. When two or more distinct insiders report open-market purchases in the same 90-day window, this site labels that a cluster — a definition, not a forecast; see insider cluster buying. “Held after” is Form 4 Table I column 5; “Change” = shares ÷ holdings before the trade (held after − shares for an acquisition, held after + shares for a disposition).
Insider Buying at ALSN
No open-market insider purchases (Form 4 code P) were reported for ALSN in the trailing 90 days. The filings below may include other transaction types — sales, grants, option exercises, and tax withholding — shown for completeness; they are not open-market purchases.
Recent Form 4 filings
Source: SEC EDGAR Form 4 · transaction codes explained
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award Dividend Equivalent Rights | 64 | — | — | — | Aug 31, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award Dividend Equivalent Rights | 3 | — | — | — | Aug 31, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award Dividend Equivalent Rights | 52 | — | — | — | Aug 31, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award Dividend Equivalent Rights | 131 | — | — | — | Aug 31, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award Dividend Equivalent Rights | 38 | — | — | — | Aug 31, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award Dividend Equivalent Rights | 28 | — | — | — | Aug 31, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award Dividend Equivalent Rights | 3 | — | — | — | Aug 31, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award Dividend Equivalent Rights | 3 | — | — | — | Aug 31, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award Dividend Equivalent Rights | 35 | — | — | — | Aug 31, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award Dividend Equivalent Rights | 11 | — | — | — | Aug 31, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award Dividend Equivalent Rights | 50 | — | — | — | Aug 31, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award Dividend Equivalent Rights | 3 | — | — | — | Aug 31, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award Dividend Equivalent Rights | 3 | — | — | — | Aug 31, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise | 26,708 | $38.11 | 331,551 | +8.8% | Aug 21, 2026 |
| Open-market sale 10b5-1 box not checked | 13,100 | $132.44 | 318,451 | −4.0% | Aug 21, 2026 |
| Open-market sale 10b5-1 box not checked | 9,050 | $133.21 | 309,401 | −2.8% | Aug 21, 2026 |
| Open-market sale 10b5-1 box not checked | 4,558 | $134.05 | 304,843 | −1.5% | Aug 21, 2026 |
| Option exercise Employee Stock Option (right to buy) | 26,708 | — | — | — | Aug 21, 2026 |
† change in this filer’s own reported holding line (Form 4 Table I, col. 5), not of total company ownership; small prior holdings produce large percentages, so under 100 shares the prior holding is shown instead.
“10b5-1 box checked” = the filer checked the Form 4 box stating that a transaction on the filing was made under a plan intended to satisfy Rule 10b5-1(c); “10b5-1 box not checked” = the box was left blank, which does not prove that no plan exists. The box applies to Form 4s filed from April 1, 2023; older filings, and boxes we could not read, carry no tag. What the 10b5-1 box means.
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box not checked | 1,050 | $125.00 | 16,604 | −5.9% | Aug 11, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise | 3,961 | $37.11 | 116,847 | +3.5% | Aug 10, 2026 |
| Open-market sale 10b5-1 box not checked | 3,961 | $122.38 | 112,886 | −3.4% | Aug 10, 2026 |
| Option exercise Employee Stock Option (right to buy) | 3,961 | — | — | — | Aug 10, 2026 |
Insider filings reported around the same time
Other companies whose most recent Form 4 was filed closest to ALSN's (Sep 2, 2026).
Frequently asked about ALSN insider activity
How many insiders bought ALSN stock in the last 90 days?
No open-market purchases (Form 4 code P) of ALSN shares were reported by Allison Transmission Holdings Inc insiders in the trailing 90 days. The 16 filings shown on this page cover other transaction types — sales, grants, option exercises, and tax withholding.
Who filed the most recent Form 4 for ALSN?
The most recent Form 4 on this page was filed by Sasha Ostojic (Director) on Sep 2, 2026, reporting 1 transaction. The original document is linked from the filing list above on SEC EDGAR. Amended filings (Form 4/A) may later revise reported figures.
What was the largest open-market ALSN insider sale shown?
The largest open-market sale among the filings shown was 13,100 ALSN shares at $132.44 (about $1,734,914) by David S. Graziosi (Chair, President and CEO) on Aug 21, 2026. Value is shares × the price reported on the Form 4; its Rule 10b5-1 box is not checked.
New to Form 4s? The transaction codes, the 90-day window and the 0–100 score are defined on the insider-activity score methodology page.
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Track ALSN insider filings free →This score summarizes SEC Form 4 filing activity over the trailing 90 days. It is descriptive, not predictive — not a rating, recommendation, or investment advice. Data: SEC EDGAR (public domain), as filed; amendments may revise figures. Tradune is not a registered investment adviser.
Data as filed; amended filings (Form 4/A) may revise figures. Sales may occur under prearranged Rule 10b5-1 trading plans.