Public ownership evidence

IDEAYA Biosciences, Inc. Common Stock (IDYA) Ownership Disclosures

Read IDYA insider transactions, institutional 13F filings and Congressional disclosures with report dates, public availability and original receipts.

As of 2026-10-10T12:08:28.848Z

Separate the three disclosure sources

Step 1 of 3

Recent Form 4 activity

IDEAYA Biosciences, Inc. Common Stock: source evidence dated 2026-10-10T12:08:28.848Z.

Available
2026-10-08
Trade date
2026-10-06
Reporting owners
Hata Yujiro S
Code
S
Shares
800
Reported value
Not reported
What you should see

The displayed owner or issuer and source fields identify the receipt to verify; keep reporting and availability dates separate.

Step 2 of 3

Is this an insider transaction, 13F holding, or Congressional event?

Each source has different dates and units. Raw ticker-matched receipts, including amendments, are not deduplicated current ownership totals.

SEC 0001610717-26-000434
What you should see

Follow the source receipt or manager/member profile. Avoid combining transaction value and 13F position value into an ownership percentage.

Step 3 of 3

Read IDYA fundamentals

Follow the source receipt or manager/member profile. Avoid combining transaction value and 13F position value into an ownership percentage.

Read IDYA fundamentals
What you should see

Keep reporting dates and units beside the answer, and inspect its original citations.

Recent Form 4 activity

See the complete recent form 4 activity
2026-10-082026-10-06Hata Yujiro SS800Not reported
2026-10-082026-10-06Hata Yujiro SS25,538Not reported

90-day public availability window, up to 50 records.

Recent institutional filing receipts

These are raw ticker-matched positions in recent 13F receipts, including amendments. They are not deduplicated current ownership totals. Open the manager profile to inspect its effective filing book.

Cornerstone Financial Management LLC2026-06-302026-08-2927$1,006None
Cornerstone Financial Management LLC2026-03-312026-08-2927$900None
Cornerstone Financial Management LLC2025-12-312026-08-2927$933None
VIRGINIA RETIREMENT SYSTEMS ET Al2026-03-312026-08-268,850$294,882None
VIRGINIA RETIREMENT SYSTEMS ET Al2026-06-302026-08-2638,950$1,451,667None
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-2593,936$3,500,995None
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-253,500,995$93,936,000None
MERCER GLOBAL ADVISORS INC /ADV2026-06-302026-08-205,686$211,917None
Sankala Group LLC2026-06-302026-08-19108$4,055None
Ensign Peak Advisors, Inc2026-03-312026-08-19899,504$29,971,473None
Ensign Peak Advisors, Inc2025-12-312026-08-19979,063$33,846,208None
Ensign Peak Advisors, Inc2025-09-302026-08-19753,164$20,493,592None
Transamerica Financial Advisors, LLC2026-06-302026-08-18101$3,764None
Seven Fleet Capital Management LP2026-06-302026-08-1837,865$1,411,229None
FLAX POND CAPITAL, LLC2026-06-302026-08-1541,302$1,539,326None
Odyssean, LLC2026-06-302026-08-15102,582$3,823,231None
AMERIFLEX GROUP, INC.2026-06-302026-08-1589$3,317None
SummitTX Capital, L.P.2026-06-302026-08-15204,872$7,635,579None
SEI INVESTMENTS CO2026-06-302026-08-1546,399$1,729,291None
SEI INVESTMENTS CO2026-06-302026-08-1522,587$841,910None
Aster Capital Management (DIFC) Ltd2026-06-302026-08-153,417$127,352None
JPL Wealth Management, LLC2026-06-302026-08-1510$373None
Rafferty Asset Management, LLC2026-06-302026-08-1564,150$2,390,871None
Marex Group Ltd2026-06-302026-08-1516,283$606,867None
Susquehanna Portfolio Strategies, LLC2026-06-302026-08-15204,659$7,627,641None
Quarry LP2026-06-302026-08-15152$5,665None
ADAR1 Capital Management, LLC2026-06-302026-08-1520,000$745,400None
XTX Topco Ltd2026-06-302026-08-1551,239$1,909,678None
Aquatic Capital Management LLC2026-06-302026-08-151,394$51,954None
CHARLES SCHWAB INVESTMENT MANAGEMENT INC2026-06-302026-08-15754,888$28,134,676None
Sixth Street Partners Management Company, L.P.2026-06-302026-08-15754,888$28,134,676None
Qube Research & Technologies Ltd2026-06-302026-08-15592,473$22,081,469None
Neo Ivy Capital Management2026-06-302026-08-1510,183$379,520None
Caption Management, LLC2026-06-302026-08-1530,529$1,137,816None
OSAIC HOLDINGS, INC.2026-06-302026-08-154,065$151,503None
OSAIC HOLDINGS, INC.2026-06-302026-08-151,833$68,313None
Squarepoint Ops LLC2026-06-302026-08-1525,218$939,875None
Man Group plc2026-06-302026-08-15140$5,218None
Man Group plc2026-06-302026-08-15245,352$9,144,269None
MetLife Investment Management, LLC2026-06-302026-08-1548,840$1,820,267None
JANE STREET GROUP, LLC2026-06-302026-08-1581,000$3,018,870Put
JANE STREET GROUP, LLC2026-06-302026-08-1526,200$976,474Call
EVENTIDE ASSET MANAGEMENT, LLC2026-06-302026-08-1565,000$2,422,550None
Orion Porfolio Solutions, LLC2026-06-302026-08-1549,352$1,839,339None
SPHERA FUNDS MANAGEMENT LTD.2026-06-302026-08-15196,408$7,320,126None
Legal & General Group Plc2026-06-302026-08-1556,804$2,117,085None
Legal & General Group Plc2026-06-302026-08-1515,515$578,244None
Legal & General Group Plc2026-06-302026-08-158,142$303,452None
RTW INVESTMENTS, LP2026-06-302026-08-15370,370$13,803,690None
Ensign Peak Advisors, Inc2026-06-302026-08-15267,182$9,957,873None

90-day public filing window, up to 50 source positions.

Cornerstone Financial Management LLC ↗Cornerstone Financial Management LLC ↗Cornerstone Financial Management LLC ↗VIRGINIA RETIREMENT SYSTEMS ET Al ↗VIRGINIA RETIREMENT SYSTEMS ET Al ↗CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM ↗CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM ↗MERCER GLOBAL ADVISORS INC /ADV ↗Sankala Group LLC ↗Ensign Peak Advisors, Inc ↗

Recent Congressional disclosures

No matching Congressional transactions were returned in this source preview.

No records are available for this view.

Bounded public source preview, up to 25 disclosed events.

How to read the disclosure dates

The tables report different things: insider transactions, institutional positions and Congressional transaction ranges. Read each table with its source dates and units. They cannot be added into a combined ownership percentage.

  1. Company insiders

    SEC Form 4 purchases, sales and awards report transactions and their public filing availability.

  2. Institutional managers

    13F reports disclose delayed quarter-end positions. They are not a record of trades between quarters.

  3. Congressional filers

    Periodic transaction reports disclose transaction dates and amount brackets. Public filing dates determine what researchers could know.

Institutional source directory ↗Congressional source directory ↗

Read the transaction codes

Awards use transaction code A, purchases P and sales S. An acquisition from an award is not the same as an open-market purchase. Joint filers may share a transaction. Use original receipts and availability dates to interpret the events.

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