SEC Form 4 · Updated Daily
MNOV
— MEDICINOVA, INC. OwnershipInsider 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 |
|---|---|---|---|---|
| Himawan Jeff | Director | 11,703,704 | 2006-01-09 | — |
| Tanabe Holding America Inc. | 10%+ Owner | 5,000,000 | 2006-10-13 | D |
| 3D Investment Partners Pte. Ltd. | Reporting Owner | 4,862,047 | 2026-09-25 | S |
| 3D Opportunity Master Fund | Reporting Owner | 4,862,047 | 2026-09-25 | S |
| Okajima Masatsune | Officer | 1,040,530 | 2019-02-28 | M |
| Satomi Hajime | 10%+ Owner | 1,000,000 | 2013-05-13 | — |
| IWAKI YUICHI | Director · Officer | 966,933 | 2021-07-09 | M |
| Nakata Kousuke | Director | 800,000 | 2011-11-29 | — |
| Kissei Pharmaceutical Co., Ltd. | 10%+ Owner | 800,000 | 2011-10-13 | — |
| Izumi Tatsuo | Director | 600,970 | 2013-12-12 | S |
| Matsuda Kazuko | Director · Officer | 322,996 | 2021-08-23 | M |
| OBrien Geoffrey | Officer | 48,318 | 2021-05-19 | M |
| Shigeta Hiroaki | Director | 45,000 | 2012-05-10 | M |
| Kalafer Michael E | Officer | 31,744 | 2009-07-28 | P |
| Kobayashi Yutaka | Director | 25,000 | 2017-05-15 | P |
| Ishizaka Yoshio | Director | 10,000 | 2017-08-21 | P |
| Morris Arlene | Director | 8,800 | 2013-05-21 | M |
| O'Toole David D | Officer | 5,000 | 2012-05-29 | P |
| COFFEE MICHAEL DENIS | Officer | 4,000 | 2011-03-29 | P |
| Johnson Kirk William | Officer | 1,700 | 2011-03-29 | P |
| Asako Shintaro | Director | 0 | 2005-07-18 | — |
| Nagao Hideki | Director | 0 | 2022-11-28 | S |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-09-25 | 3D Opportunity Master Fund | Open-market sale | 640,000 | $2.70 | 4,862,047 |
| 2026-09-25 | 3D Investment Partners Pte. Ltd. | Open-market sale | 640,000 | $2.70 | 4,862,047 |
| 2026-06-23 | BEAVER CAROLYN | Grant / award (derivative) | 44,500 | $0.00 | 44,500 |
| 2026-06-23 | Lemerond Nicole | Grant / award (derivative) | 44,500 | $0.00 | 44,500 |
| 2026-06-23 | Nagao Hideki | Grant / award (derivative) | 44,500 | $0.00 | 44,500 |
| 2026-01-16 | IWAKI YUICHI | Grant / award (derivative) | 450,000 | $0.00 | 450,000 |
| 2026-01-16 | Matsuda Kazuko | Grant / award (derivative) | 350,000 | $0.00 | 350,000 |
| 2025-06-17 | BEAVER CAROLYN | Grant / award (derivative) | 20,000 | $0.00 | 20,000 |
| 2025-06-17 | Lemerond Nicole | Grant / award (derivative) | 20,000 | $0.00 | 20,000 |
| 2025-06-17 | Nagao Hideki | Grant / award (derivative) | 20,000 | $0.00 | 20,000 |
| 2025-02-12 | BEAVER CAROLYN | Grant / award (derivative) | 24,500 | $0.00 | 24,500 |
| 2025-02-12 | IWAKI YUICHI | Grant / award (derivative) | 100,000 | $0.00 | 100,000 |
| 2025-02-12 | Lemerond Nicole | Grant / award (derivative) | 24,500 | $0.00 | 24,500 |
| 2025-02-12 | Matsuda Kazuko | Grant / award (derivative) | 100,000 | $0.00 | 100,000 |
| 2025-02-12 | Nagao Hideki | Grant / award (derivative) | 24,500 | $0.00 | 24,500 |
| 2025-01-07 | Matsuda Kazuko | Grant / award (derivative) | 300,000 | $0.00 | 300,000 |
| 2025-01-07 | IWAKI YUICHI | Grant / award (derivative) | 400,000 | $0.00 | 400,000 |
| 2024-06-11 | BEAVER CAROLYN | Grant / award (derivative) | 20,000 | $0.00 | 20,000 |
| 2024-06-11 | Lemerond Nicole | Grant / award (derivative) | 20,000 | $0.00 | 20,000 |
| 2024-06-11 | Nagao Hideki | Grant / award (derivative) | 20,000 | $0.00 | 20,000 |
| 2024-01-09 | IWAKI YUICHI | Grant / award (derivative) | 210,000 | $0.00 | 210,000 |
| 2024-01-09 | Matsuda Kazuko | Grant / award (derivative) | 157,500 | $0.00 | 157,500 |
| 2024-01-09 | OBrien Geoffrey | Grant / award (derivative) | 84,000 | $0.00 | 84,000 |
| 2023-08-04 | Lemerond Nicole | Grant / award (derivative) | 18,333 | $0.00 | 18,333 |
| 2023-06-13 | BEAVER CAROLYN | Grant / award (derivative) | 20,000 | $0.00 | 20,000 |
| 2023-06-13 | Nagao Hideki | Grant / award (derivative) | 20,000 | $0.00 | 20,000 |
| 2023-01-23 | Matsuda Kazuko | Grant / award (derivative) | 149,625 | $0.00 | 149,625 |
| 2023-01-23 | OBrien Geoffrey | Grant / award (derivative) | 76,950 | $0.00 | 76,950 |
| 2023-01-23 | IWAKI YUICHI | Grant / award (derivative) | 235,125 | $0.00 | 235,125 |
| 2022-11-28 | Nagao Hideki | Open-market sale | 6,754 | $2.25 | 0 |
| 2022-11-22 | Nagao Hideki | Open-market sale | 218 | $2.13 | 6,754 |
| 2022-11-21 | Nagao Hideki | Open-market sale | 5,365 | $2.18 | 6,972 |
| 2022-11-17 | Nagao Hideki | Open-market sale | 309 | $2.18 | 12,337 |
| 2022-06-16 | BEAVER CAROLYN | Grant / award (derivative) | 20,000 | $0.00 | 20,000 |
| 2022-06-16 | Nagao Hideki | Grant / award (derivative) | 20,000 | $0.00 | 20,000 |
| 2022-01-27 | IWAKI YUICHI | Grant / award (derivative) | 302,500 | $0.00 | 302,500 |
| 2022-01-27 | Matsuda Kazuko | Grant / award (derivative) | 192,500 | $0.00 | 192,500 |
| 2022-01-27 | OBrien Geoffrey | Grant / award (derivative) | 99,000 | $0.00 | 99,000 |
| 2021-08-23 | Matsuda Kazuko | Option exercise (derivative) | 60,000 | $0.00 | 0 |
| 2021-08-23 | Matsuda Kazuko | Option exercise | 60,000 | $2.30 | 322,996 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.