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ALSN · Allison Transmission Holdings Inc

Everything on this page is public record — SEC Form 4 filings and congressional disclosures — alongside any INSIDER SCANNER research case for this company.

Open-market buys0
Open-market sells3
Research cases0
Last filing2026-08-21

Insider flow: Selling only — a count of disclosed transactions, not a rating or a recommendation.

Insider transaction timeline

Every reported transaction, positioned by trade date. Purchases sit above the axis, sales below; circle area is proportional to dollar value. No share-price line is drawn — this feed carries transaction prices only, and a price history inferred from them would imply market data the filings do not contain.

Open-market purchase Open-market sale
2026-08-21 — Graziosi David S. · sold 13,100 @ $132.44 2026-08-21 — Graziosi David S. · sold 9,050 @ $133.21 2026-08-21 — Graziosi David S. · sold 4,558 @ $134.05
2026-08-212026-08-21

Insider participation

One row per insider, one cell per reported transaction, shaded by value. Repeat buying and activity clustered in time are visible at a glance.

Graziosi David S. Chair, President and CEO
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The analysis built on top of these filings

The filings above are public record and stay public here. What an account adds for $ALSN is the reading of them — and for this company, that is what the list below says it is, no more.

  • Transaction timelineThe [{'transaction_date': '2026-08-21', 'insider_name': 'Graziosi David S.', 'insider_title': 'Chair, President and CEO', 'transaction_type': 'Open-market sell', 'shares': 13100.0, 'price': 132.4362, 'value': 1734914.22, 'is_buy': False}, {'transaction_date': '2026-08-21', 'insider_name': 'Graziosi David S.', 'insider_title': 'Chair, President and CEO', 'transaction_type': 'Open-market sell', 'shares': 9050.0, 'price': 133.2116, 'value': 1205564.98, 'is_buy': False}, {'transaction_date': '2026-08-21', 'insider_name': 'Graziosi David S.', 'insider_title': 'Chair, President and CEO', 'transaction_type': 'Open-market sell', 'shares': 4558.0, 'price': 134.0479, 'value': 610990.33, 'is_buy': False}] reported transactions plotted over the window rather than listed, so concentration is visible.

Not available for ALSN today: no reported open-market purchases in this window, so there is no insider cost basis to compute; no research case — nothing here has cleared the scoring threshold. Both appear on this page on their own if that changes.

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Not financial advice. This page reports public filings and past research output. It is not a recommendation to buy or sell, and no price target here is a prediction. Trade at your own risk.