🕵️ Adverum Biotechnologies, Inc. ($ADVM)
SEC insider & ownership activity, last 12 months · CIK 1501756 · every row links its SEC filing
Over the last 12 months insiders sold $4.6M against $765K of open-market buying. Leonard Braden Michael sold $4.6M (Dec). One red-flag 8-K in the window: Delisting notice (3.01), Dec 9, 2025.
Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
2 buyers, $765K (3 lots) · 1 seller, $4.6M (4 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Leonard Braden Michael | 0 | – | 4 | $4.6M | Dec 4, 2025 |
| Fischer Laurent | 2 | $554K | 0 | – | Dec 8, 2025 |
| Soparkar Peter | 1 | $211K | 0 | – | Dec 5, 2025 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| TCG Crossover GP II, LLC | 8.9% | 13G | May 15, 2025 | filing ↗ | |
| TCG Crossover Fund II, L.P. | 8.9% | 13G | May 15, 2025 | filing ↗ | |
| Chen Yu | 8.9% | 13G | May 15, 2025 | filing ↗ |
Planned insider sales (Form 144)
No sale notices filed in the last 12 months.
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Acquisition or disposition (2.01) | Dec 9, 2025 | filing ↗ |
| Delisting notice (3.01) | Dec 9, 2025 | filing ↗ |
| Material Modifications to Rights of Security Holders (3.03) | Dec 9, 2025 | filing ↗ |
| Change of control (5.01) | Dec 9, 2025 | filing ↗ |
| Officer/director changes (5.02) | Dec 9, 2025 | filing ↗ |
| Charter/bylaw changes (5.03) | Dec 9, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Dec 9, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Dec 4, 2025 | filing ↗ |
| Other events (8.01) | Dec 4, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Dec 4, 2025 | filing ↗ |
| Agreement terminated (1.02) | Nov 19, 2025 | filing ↗ |
| New financial obligation (2.03) | Nov 19, 2025 | filing ↗ |
| Other events (8.01) | Nov 19, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 19, 2025 | filing ↗ |
| Material agreement (1.01) | Oct 24, 2025 | filing ↗ |
| New financial obligation (2.03) | Oct 24, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Oct 24, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 24, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Sep 22, 2025 | filing ↗ |
| Other events (8.01) | Sep 22, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Sep 22, 2025 | filing ↗ |
| Earnings (2.02) | Aug 12, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 12, 2025 | filing ↗ |