IDYA · IDEAYA Biosciences Inc. Common Stock
View on chartInsiders & Stakes
| Hata Yujiro S President and CEO | ▼ Sell | Open Market | 690,695 Shares held | 10/6/2026 | View profile |
| Dillon Michael P. SVP, Chief Scientific Officer | ▼ Sell | Open Market | 78,789 Shares held | 10/4/2021 | View profile |
| Throne Jason Chief Legal Officer | ▲ Buy | Option Exercise | 63,484 Shares held | 6/27/2024 | View profile |
| Stein Jeffrey | ▲ Buy | Open Market | 54,281 Shares held | 3/2/2026 | View profile |
| Ruiz Briseno Andres See Remarks | ▼ Sell | Open Market | 26,466 Shares held | 7/7/2026 | View profile |
| Stone Paul A. SVP, Chief Financial Officer | ▼ Sell | Open Market | 9,303 Shares held | 8/29/2023 | View profile |
| Snyder Douglas B. SVP, General Counsel | ▲ Buy | Grant | 2,080 Shares held | 11/28/2025 | View profile |
| WHITE MICHAEL ANTHONY Chief Scientific Officer | ▼ Sell | Open Market | 0 Shares held | 5/29/2024 | View profile |
Transaction History
| Hata Yujiro S | ▲ Buy | Option Exercise | 26,338 | $114K | 10/6/2026 |
| Hata Yujiro S | ▼ Sell | Open Market | 25,538 | $955K | 10/6/2026 |
| Hata Yujiro S | ▼ Sell | Open Market | 800 | $31K | 10/6/2026 |
| Ruiz Briseno Andres | ▲ Buy | Option Exercise | 9,550 | $123K | 7/7/2026 |
| Ruiz Briseno Andres | ▼ Sell | Open Market | 9,550 | $382K | 7/7/2026 |
| Stein Jeffrey | ▲ Buy | Open Market | 50,000 | $1.6M | 3/2/2026 |
| Snyder Douglas B. | ▲ Buy | Grant | 1,041 | $18K | 11/28/2025 |
| Ruiz Briseno Andres | ▲ Buy | Grant | 1,253 | $21K | 11/28/2025 |
| Snyder Douglas B. | ▲ Buy | Grant | 1,039 | $18K | 5/30/2025 |
| Hata Yujiro S | ▲ Buy | Option Exercise | 12,808 | $250K | 2/18/2025 |
| Ruiz Briseno Andres | ▲ Buy | Grant | 682 | $16K | 11/29/2024 |
| Throne Jason | ▲ Buy | Option Exercise | 6,424 | $86K | 6/27/2024 |
| Throne Jason | ▲ Buy | Option Exercise | 47,060 | $330K | 6/27/2024 |
| WHITE MICHAEL ANTHONY | ▲ Buy | Option Exercise | 28,500 | $367K | 5/29/2024 |
| WHITE MICHAEL ANTHONY | ▼ Sell | Open Market | 27,649 | $1.0M | 5/29/2024 |
| WHITE MICHAEL ANTHONY | ▼ Sell | Open Market | 851 | $31K | 5/29/2024 |
| Hata Yujiro S | ▲ Buy | Option Exercise | 34,433 | $148K | 5/16/2024 |
| Hata Yujiro S | ▼ Sell | Open Market | 30,084 | $1.3M | 5/16/2024 |
| Hata Yujiro S | ▼ Sell | Open Market | 4,349 | $184K | 5/16/2024 |
| Hata Yujiro S | ▼ Sell | Open Market | 503 | $22K | 5/15/2024 |
| Hata Yujiro S | ▲ Buy | Option Exercise | 83,856 | $361K | 5/15/2024 |
| Hata Yujiro S | ▼ Sell | Open Market | 53,592 | $2.3M | 5/15/2024 |
| Hata Yujiro S | ▼ Sell | Open Market | 29,761 | $1.3M | 5/15/2024 |
| Hata Yujiro S | ▲ Buy | Option Exercise | 56,711 | $244K | 5/14/2024 |
| Hata Yujiro S | ▼ Sell | Open Market | 2,303 | $96K | 5/14/2024 |
| Hata Yujiro S | ▼ Sell | Open Market | 54,408 | $2.3M | 5/14/2024 |
| Ruiz Briseno Andres | ▼ Sell | Open Market | 2,000 | $92K | 2/9/2024 |
| Hata Yujiro S | ▲ Buy | Option Exercise | 23,557 | $102K | 2/9/2024 |
| Hata Yujiro S | ▼ Sell | Open Market | 23,557 | $1.1M | 2/9/2024 |
| Hata Yujiro S | ▲ Buy | Option Exercise | 75,815 | $327K | 2/8/2024 |
| Hata Yujiro S | ▼ Sell | Open Market | 75,815 | $3.4M | 2/8/2024 |
| Hata Yujiro S | ▲ Buy | Option Exercise | 628 | $3K | 2/1/2024 |
| Hata Yujiro S | ▼ Sell | Open Market | 624 | $28K | 2/1/2024 |
| Hata Yujiro S | ▼ Sell | Open Market | 4 | $180 | 2/1/2024 |
| Ruiz Briseno Andres | ▼ Sell | Open Market | 2,000 | $84K | 1/22/2024 |
| Hata Yujiro S | ▼ Sell | Open Market | 62,739 | $2.5M | 1/16/2024 |
| Hata Yujiro S | ▲ Buy | Option Exercise | 62,739 | $270K | 1/16/2024 |
| Ruiz Briseno Andres | ▼ Sell | Open Market | 2,000 | $76K | 1/12/2024 |
| Hata Yujiro S | ▲ Buy | Option Exercise | 12,261 | $53K | 1/12/2024 |
| Hata Yujiro S | ▼ Sell | Open Market | 12,261 | $491K | 1/12/2024 |
| Throne Jason | ▲ Buy | Option Exercise | 10,000 | $70K | 12/18/2023 |
| Throne Jason | ▲ Buy | Option Exercise | 10,000 | $133K | 12/15/2023 |
| Throne Jason | ▼ Sell | Open Market | 10,000 | $350K | 12/15/2023 |
| Hata Yujiro S | ▲ Buy | Option Exercise | 75,000 | $323K | 12/15/2023 |
| Hata Yujiro S | ▼ Sell | Open Market | 75,000 | $2.6M | 12/15/2023 |
| Ruiz Briseno Andres | ▼ Sell | Open Market | 1,672 | $57K | 12/14/2023 |
| Ruiz Briseno Andres | ▼ Sell | Open Market | 328 | $11K | 12/14/2023 |
| Throne Jason | ▲ Buy | Option Exercise | 5,163 | $66K | 11/3/2023 |
| Throne Jason | ▼ Sell | Open Market | 5,163 | $155K | 11/3/2023 |
| Throne Jason | ▲ Buy | Option Exercise | 1,000 | $13K | 9/12/2023 |
| Throne Jason | ▼ Sell | Open Market | 500 | $15K | 9/12/2023 |
| Throne Jason | ▼ Sell | Open Market | 500 | $15K | 9/12/2023 |
| Throne Jason | ▼ Sell | Open Market | 1,737 | $52K | 9/5/2023 |
| Throne Jason | ▲ Buy | Option Exercise | 1,737 | $22K | 9/5/2023 |
| Throne Jason | ▲ Buy | Option Exercise | 2,100 | $27K | 9/1/2023 |
| Throne Jason | ▼ Sell | Open Market | 2,100 | $63K | 9/1/2023 |
| Ruiz Briseno Andres | ▼ Sell | Open Market | 2,000 | $60K | 9/1/2023 |
| Stone Paul A. | ▼ Sell | Open Market | 5,000 | $144K | 8/29/2023 |
| Stone Paul A. | ▼ Sell | Open Market | 978 | $26K | 8/21/2023 |
| Stone Paul A. | ▼ Sell | Open Market | 3,822 | $101K | 8/18/2023 |
| Stone Paul A. | ▼ Sell | Open Market | 100 | $3K | 8/16/2023 |
| Stone Paul A. | ▼ Sell | Open Market | 100 | $3K | 8/16/2023 |
| Throne Jason | ▲ Buy | Option Exercise | 5,000 | $67K | 8/9/2023 |
| Throne Jason | ▼ Sell | Open Market | 5,000 | $125K | 8/9/2023 |
| Stone Paul A. | ▼ Sell | Open Market | 2,500 | $63K | 8/9/2023 |
| Throne Jason | ▲ Buy | Option Exercise | 4,485 | $31K | 7/10/2023 |
| Throne Jason | ▲ Buy | Option Exercise | 5,000 | $64K | 7/10/2023 |
| Throne Jason | ▼ Sell | Open Market | 9,485 | $218K | 7/10/2023 |
| Throne Jason | ▲ Buy | Option Exercise | 3,553 | $25K | 6/1/2023 |
| Throne Jason | ▼ Sell | Open Market | 3,553 | $82K | 6/1/2023 |
| Throne Jason | ▲ Buy | Option Exercise | 432 | $3K | 5/31/2023 |
| Throne Jason | ▼ Sell | Open Market | 432 | $10K | 5/31/2023 |
| Throne Jason | ▲ Buy | Option Exercise | 500 | $4K | 5/22/2023 |
| Throne Jason | ▼ Sell | Open Market | 500 | $12K | 5/22/2023 |
| Stone Paul A. | ▲ Buy | Option Exercise | 8,000 | $37K | 4/13/2023 |
| Hata Yujiro S | ▲ Buy | Option Exercise | 11,601 | $50K | 4/12/2023 |
| Dillon Michael P. | ▼ Sell | Open Market | 500 | $13K | 10/4/2021 |
| Dillon Michael P. | ▼ Sell | Open Market | 1,000 | $27K | 10/4/2021 |
| Dillon Michael P. | ▲ Buy | Option Exercise | 1,500 | $17K | 10/4/2021 |
| Dillon Michael P. | ▲ Buy | Option Exercise | 4,313 | $48K | 9/8/2021 |
| Dillon Michael P. | ▲ Buy | Option Exercise | 7,071 | $30K | 9/8/2021 |
| Dillon Michael P. | ▼ Sell | Open Market | 11,184 | $307K | 9/8/2021 |
| Dillon Michael P. | ▼ Sell | Open Market | 200 | $6K | 9/8/2021 |
| Dillon Michael P. | ▼ Sell | Open Market | 116 | $3K | 9/7/2021 |
| Stone Paul A. | ▼ Sell | Open Market | 2,500 | $69K | 9/7/2021 |
| Dillon Michael P. | ▲ Buy | Option Exercise | 116 | $500 | 9/7/2021 |
| Dillon Michael P. | ▼ Sell | Open Market | 10,000 | $251K | 9/2/2021 |
| Stone Paul A. | ▲ Buy | Grant | 859 | $10K | 5/28/2021 |
AI Market Commentary
AI-generatedAll commentary →Synthesized from recent news and fundamentals/technical data -- not human analyst commentary or trader sentiment.
October 11, 2026
IDEAYA Biosciences Rethinks R&D Leadership Amid Valuation Questions
IDEAYA Biosciences is reevaluating its research and development leadership structure as questions about the company's valuation grow. This internal restructuring occurs while the stock trades near its support level of $35.91, well below the average analyst target of $52.75. The move signals a strategic shift in how the company approaches its scientific pipeline and cost management.
IDEAYA Biosciences Rethinks R&D Leadership Amid Valuation Questions. IDEAYA Biosciences is reevaluating its research and development leadership structure as questions about the company's valuation grow. This internal restructuring occurs while the stock trades near its support level of $35.91, well below the average analyst target of $52.75. The move signals a strategic shift in how the company approaches its scientific pipeline and cost management.