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Ideaya Biosciences stock timeline
A year of the price with every insider trade, planned sale, earnings report and material 8-K marked
252 sessions+4.7% to $31.24
Ideaya Biosciences (IDYA) stock rose 5% over the last 252 sessions, to $31.24. On the way it reported 4 quarters, its insiders filed 1 open-market trade and 2 Form 144 notices of planned sales, and the company filed 1 material 8-K. Each is marked on the price and listed with what the stock did next.
Each mark, and what followed
| Date | Kind | What | Next session | 5 sessions | 21 sessions |
|---|---|---|---|---|---|
| Nov 3, 2026 | Earnings | Earnings: missed the EPS estimate by -4.9% | −1.0% (−1.3% vs SPY) | — | — |
| Oct 6, 2026 | Form 144 | Form 144: Yujiro Hata plans to sell $8.8M | −3.8% (−4.4% vs SPY) | −5.4% (−5.8% vs SPY) | −19.5% (−16.8% vs SPY) |
| Aug 4, 2026 | Earnings | Earnings: missed the EPS estimate by -16.2% | +2.0% (+0.2% vs SPY) | +3.7% (+1.7% vs SPY) | +12.1% (+11.6% vs SPY) |
| Jul 7, 2026 | Form 144 | Form 144: Andres Ruiz Briseno plans to sell $382K | +2.8% (+3.3% vs SPY) | −8.5% (−8.3% vs SPY) | −8.6% (−11.3% vs SPY) |
| May 5, 2026 | Earnings | Earnings: missed the EPS estimate by -13.5% | −0.3% (−1.1% vs SPY) | −2.7% (−5.6% vs SPY) | −1.8% (−6.7% vs SPY) |
| Mar 2, 2026 | Insider buy | Stein Jeffrey bought $1.6M | +2.6% (+2.5% vs SPY) | +3.0% (+5.0% vs SPY) | −2.3% (+5.6% vs SPY) |
| Feb 17, 2026 | Earnings | Earnings: beat the EPS estimate by 0.6% | +1.6% (+1.5% vs SPY) | +5.9% (+5.8% vs SPY) | +12.4% (+14.1% vs SPY) |
| Dec 12, 2025 | 8-K | Termination of a material agreement | −1.9% (−1.8% vs SPY) | −1.4% (−1.5% vs SPY) | +8.5% (+6.9% vs SPY) |
Insiders’ record here
In the year on the chart, Ideaya Biosciences' insiders reported 1 open-market buy ($1.6M) and 0 sales ($0). Of the 1 old enough to score, 0 were followed by the stock doing what the trade implied over the next 63 sessions (beating SPY after a buy, lagging it after a sale); the median excess return after a buy was −22.9% and after a sale —.
Across the whole universe (19,782 scored trades), insider buys beat the market 46% of the time and sales were followed by a lagging stock 61% of the time; buys of $1M or more 39%. Every pattern →
What this kind of 8-K usually did
| Item | 8-Ks | Next session, median | Up next session | 21 sessions, median | Typical size |
|---|---|---|---|---|---|
| 1.02 Termination of a material agreement | 2,368 | 0.0% | 51% | +1.1% | ±1.5% |
Across every company in the move-odds universe, measured from the close before the filing. Every 8-K item ranked →
Report card: every quarter against the estimate → Ideaya Biosciences: every quarter → Live insider trades →
Prices are daily closes; filings and trades are as filed with the SEC (Form 4 within two business days of the trade, 8-K within four of the event). Moves after a mark are the stock's close-to-close change and the same for SPY; they describe the record, not what the next one will do. Not investment advice.