🕵️ Merus N.V. ($MRUS)
SEC insider & ownership activity, last 12 months · CIK 1651311 · every row links its SEC filing
Over the last 12 months insiders sold $960K against $234.9M of open-market buying. Genmab A/S bought $234.9M (Dec). One red-flag 8-K in the window: Delisting notice (3.01), Dec 29, 2025.
Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
1 buyer, $234.9M (10 lots) · 1 seller, $960K (2 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Genmab A/S | 10 | $234.9M | 0 | – | Dec 29, 2025 |
| Shuman Harry | 0 | – | 2 | $960K | Nov 26, 2025 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Wellington Management Company LLP | 6.5% | 13G | May 12, 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 29, 2025 | filing ↗ |
| Delisting notice (3.01) | Dec 29, 2025 | filing ↗ |
| Material Modifications to Rights of Security Holders (3.03) | Dec 29, 2025 | filing ↗ |
| Officer/director changes (5.02) | Dec 29, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Dec 29, 2025 | filing ↗ |
| Acquisition or disposition (2.01) | Dec 12, 2025 | filing ↗ |
| Material Modifications to Rights of Security Holders (3.03) | Dec 12, 2025 | filing ↗ |
| Change of control (5.01) | Dec 12, 2025 | filing ↗ |
| Officer/director changes (5.02) | Dec 12, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Dec 12, 2025 | filing ↗ |
| Shareholder vote (5.07) | Dec 9, 2025 | filing ↗ |
| Material agreement (1.01) | Sep 29, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Sep 29, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Sep 29, 2025 | filing ↗ |