SEC Form 4 · Updated Daily
MRUS
Insider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| GENMAB A/S | 10%+ Owner | 73,884,293 | 2025-12-29 | P |
| INCYTE CORP | 10%+ Owner | 3,200,000 | 2019-12-31 | — |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2025-12-29 | GENMAB A/S | Open-market buy | 75,867,199 | $97.00 | 0 |
| 2025-12-29 | GENMAB A/S | Open-market buy | 1,052,806 | $97.00 | 73,884,293 |
| 2025-12-26 | GENMAB A/S | Open-market buy | 142,610 | $97.00 | 72,828,509 |
| 2025-12-26 | GENMAB A/S | Open-market buy | 2,978 | $97.00 | 72,831,487 |
| 2025-12-24 | GENMAB A/S | Open-market buy | 96,082 | $97.00 | 72,685,899 |
| 2025-12-23 | GENMAB A/S | Open-market buy | 561,042 | $97.00 | 72,589,817 |
| 2025-12-22 | GENMAB A/S | Open-market buy | 15,710 | $97.00 | 72,028,775 |
| 2025-12-19 | GENMAB A/S | Open-market buy | 66,264 | $97.00 | 72,013,065 |
| 2025-12-18 | GENMAB A/S | Open-market buy | 212,177 | $97.00 | 71,946,801 |
| 2025-12-17 | GENMAB A/S | Open-market buy | 150,795 | $97.00 | 71,734,624 |
| 2025-12-16 | GENMAB A/S | Open-market buy | 120,752 | $97.00 | 71,583,829 |
| 2025-12-12 | GENMAB A/S | — | — | — | 71,463,077 |
| 2019-12-31 | INCYTE CORP | — | — | — | 3,200,000 |
| 2017-01-23 | INCYTE CORP | — | — | — | 3,200,000 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.