IDEAYA Biosciences (IDYA) stock: insider trades, news & valuation
Net buyingShare price and insider trades
IDEAYA Biosciences insider trading at a glance (Oct 9, 2026): in the past 12 months, 1 insider bought $1.6M and 2 sold $1.4M of IDYA stock on the open market.
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IDYA insider buying and selling by quarter
Open-market purchases (green, above the line) and sales (red, below), by trade date.
| Quarter | Bought | Purchases | Sold | Sales |
|---|---|---|---|---|
| Q4 2026 | — | 0 | $985K | 2 |
| Q3 2026 | — | 0 | $382K | 1 |
| Q2 2026 | — | 0 | — | 0 |
| Q1 2026 | $1.6M | 1 | — | 0 |
Valuation, profit and volume
Summary
Over the past 12 months, 1 IDEAYA Biosciences, Inc. insider reported open-market purchases totaling $1.6M, while 2 insiders reported sales totaling $1.4M. 3 of 3 recorded sales were made under pre-scheduled Rule 10b5-1 trading plans, which are usually less informative than discretionary sales.
Insider transactions
Open-market purchases and sales.
| Filed | Insider | Type | Shares | Price | Value | Since | Score |
|---|---|---|---|---|---|---|---|
| Oct 8SEC | Yujiro S HataCEO, President | Sell Plan | 25,538691,495 held (−4%) | $37.39 | $955K | -3.4% | — |
| Oct 8SEC | Yujiro S HataCEO, President | Sell Plan | 800690,695 held (−0%) | $38.26 | $31K | -5.6% | — |
| Jul 9SEC | Briseno Andres RuizChief Accounting Officer | Sell Plan | 9,55026,466 held (−27%) | $40.01 | $382K | -9.7% | — |
| Mar 2SEC | Jeffrey SteinDirector | Buy | 50,00054,281 held (+1168%) | $32.96 | $1.6M | +9.6% | — |
Insiders at IDEAYA Biosciences, Inc.
| Insider | Bought | Sold | Last filing | Score |
|---|---|---|---|---|
| Jeffrey SteinDirector | $1.6M | — | Mar 2, 2026 | — |
| Yujiro S HataCEO, President | — | $985K | Oct 8, 2026 | — |
| Briseno Andres RuizChief Accounting Officer | — | $382K | Jul 9, 2026 | — |
IDYA stock: common questions
Are IDEAYA Biosciences, Inc. insiders buying IDYA stock?
In the past 12 months, 1 insiders reported open-market purchases of IDYA worth $1.6M. The latest was Director Jeffrey Stein bought $1.6M of IDYA at $32.96 — first open-market purchase in our records; raises the stake by 1168%.
Are IDEAYA Biosciences, Inc. insiders selling IDYA stock?
2 insiders reported sales worth $1.4M over the same period.
Where does this data come from?
Every transaction comes from Form 4 filings that insiders must submit to the SEC within two business days of a trade. We pull them from SEC EDGAR every night.
What is IDYA's 52-week range?
Over the past year IDYA has traded between $26.24 and $42.48. It last closed at $36.11 on Oct 9, 2026.