Updated Jul 16, 2026 · Last SEC filing 2026-06-08
Allison Transmission Holdings Inc (ALSN) has filed 23 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-06-08. 3 Form 8-K material event filings were reported by ALSN in the last 90 days. 1 Form 144 notices of proposed sale were filed for ALSN stock. InsiderAlpha tracks every ALSN SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.
| SIC classification | Motor Vehicle Parts & Accessories (SIC 3714) |
|---|---|
| SEC CIK | 0001411207 |
| Form 4 filings (90d) | 23 |
|---|---|
| Form 8-K filings (90d) | 3 |
| Form 144 notices (90d) | 1 |
| Latest Form 4 filing | 2026-06-08 |
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Bohley G Frederick | See Remarks | F — Tax withholding / forfeiture | 242 | $118.38 | $29K | SEC | |
| Bohley G Frederick | See Remarks | M — Option exercise | 533 | — | — | SEC | |
| Bohley G Frederick | See Remarks | M — Option exercise | 10 | — | — | SEC | |
| Mell Scott A | CFO & Treasurer | S — Open-market sale | 933 | $125.00 | $117K | SEC | |
| Mell Scott A | CFO & Treasurer | S — Open-market sale | 1.3K | $125.00 | $167K | SEC | |
| Mell Scott A | CFO & Treasurer | M — Option exercise | 1.3K | $89.41 | $120K | SEC | |
| Ostojic Sasha | Insider | M — Option exercise | 1.6K | $0.00 | — | SEC | |
| Shivram Krishna | Insider | M — Option exercise | 1.6K | $0.00 | — | SEC | |
| BARBOUR D. SCOTT | Insider | M — Option exercise | 1.6K | $0.00 | — | SEC | |
| Perna Gustave | Insider | M — Option exercise | 1.6K | $0.00 | — | SEC | |
| Christman Philip J | Insider | A — Grant or award | 92 | $0.00 | — | SEC | |
| Christman Philip J | Insider | M — Option exercise | 1.6K | $0.00 | — | SEC | |
| BARBOUR D. SCOTT | Insider | A — Grant or award | 92 | $0.00 | — | SEC | |
| Mell Scott A | CFO & Treasurer | M — Option exercise | 23 | — | — | SEC | |
| Mell Scott A | CFO & Treasurer | F — Tax withholding / forfeiture | 879 | $128.26 | $113K | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for Allison Transmission Holdings Inc (ALSN). Updated in real time as new filings are submitted to the SEC.
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| Bohley G Frederick | 6 | $29K |
| BARBOUR D. SCOTT | 6 | — |
| Christman Philip J | 6 | — |
| Ostojic Sasha | 5 | — |
| Perna Gustave | 5 | — |
Form 144 must be filed before insiders sell restricted or control stock above SEC thresholds. A cluster of Form 144 notices often precedes a wave of insider distribution.
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in ALSN insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
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