Jeffrey Stein insider trades: IDEAYA Biosciences (IDYA) stock buys and sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Jeffrey reports to the SEC
Open-market buys and sales
18 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Mar 2, 2026 | IDYA | ↑ Buy | 50,000 | $32.96 | $1.6M | Direct | Mar 2, 2026 (0d) |
| Jun 7, 2024 | CDTX | ↑ Buy | 8,000 | $13.21 | $106K | By trust | Jun 11, 2024 (4d) |
| Aug 8, 2023 | CDTX | ↑ Buy | 50,000 | $0.96 | $48K | By trust | Aug 8, 2023 (0d) |
| Mar 27, 2023 | CDTX | ↑ Buy | 50,000 | $1.04 | $52K | By trust | Mar 27, 2023 (0d) |
| Feb 21, 2023 | PRTK | ↓ Sell10b5-1 | 7,000 | $1.90 | $13K | Direct | Feb 23, 2023 (2d) |
| Nov 12, 2021 | CDTX | ↑ Buy | 50,000 | $1.59 | $80K | Direct | Nov 15, 2021 (3d) |
| Aug 19, 2021 | CDTX | ↑ Buy | 50,000 | $1.74 | $87K | Direct | Aug 19, 2021 (0d) |
| Nov 10, 2020 | CDTX | ↑ Buy | 4,262 | $79.55 | $339K | By trust | Jan 7, 2026 (1884d) |
| Nov 10, 2020 | CDTX | ↑ Buy | 50,000 | $2.00 | $100K | Direct | Nov 12, 2020 (2d) |
| Sep 24, 2019 | CDTX | ↑ Buy | 52,500 | $1.91 | $100K | By trust | Sep 26, 2019 (2d) |
| Feb 15, 2019 | PRTK | ↓ Sell10b5-1 | 3,375 | $7.14 | $24K | Direct | Feb 20, 2019 (5d) |
| May 23, 2018 | CDTX | ↑ Buy | 212,766 | $4.70 | $1.0M | Direct | May 24, 2018 (1d) |
| Sep 12, 2017 | CDTX | ↑ Buy | 7,350 | $6.79 | $50K | Direct | Sep 12, 2017 (0d) |
| Jun 5, 2017 | CDTX | ↑ Buy | 15,000 | $5.95 | $89K | Direct | Jun 7, 2017 (2d) |
| Mar 31, 2017 | CDTX | ↑ Buy | 12,900 | $7.75 | $100K | Direct | Apr 4, 2017 (4d) |
| May 20, 2016 | CDTX | ↑ Buy | 4,310 | $11.51 | $50K | By trust | May 23, 2016 (3d) |
| Nov 25, 2015 | CDTX | ↑ Buy | 6,700 | $15.09 | $101K | Direct | Nov 27, 2015 (2d) |
| Apr 20, 2015 | CDTX | ↑ Buy | 420 | $16.00 | $7K | By son | Apr 21, 2015 (1d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other IDYA insiders
Open-market trades in the last 12 months
About Jeffrey Stein's insider trades
Jeffrey Stein is an insider at IDEAYA Biosciences (IDYA). Since Apr 20, 2015, Jeffrey has reported 16 open-market purchases worth $4.0M and 2 sales worth $37K on SEC Form 4. In the last 12 months: 1 buy ($1.6M).
2 sales (100% of the value sold) were made under a Rule 10b5-1 trading plan, which is set up months in advance and runs on a schedule, so they say little about how the insider sees the stock today.
Their filings also include grants and awards (34 filings), option exercises (6 filings), shares returned to the company (3 filings), shares withheld for taxes (3 filings). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every IDYA insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.