IDEAYA Biosciences, Inc.
US ˙ NasdaqGS ˙ US45166A1025

SecurityIDYA / IDEAYA Biosciences, Inc.
InstitutionDimensional Fund Advisors Lp
Latest Disclosed Ownership1,333,478 shares
Latest Disclosed Value $ 44,417,991
Dimensional Fund Advisors Lp reports 42.03% increase in ownership of IDYA / IDEAYA Biosciences, Inc.

On May 7, 2026 - Dimensional Fund Advisors Lp filed a 13F-HR form disclosing ownership of 1,333,478 shares of IDEAYA Biosciences, Inc. (US:IDYA) valued at $44,431,487 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 938,857 shares of IDEAYA Biosciences, Inc.. This represents a change in shares of 42.03% during the quarter. The current value of the position is $37,724,093 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-07 2026-03-31 13F IDEAYA BIOSCIENCES COM 45166A102 1,333,478 394,621 42.03 44,418 36.85 0.0020
2026-02-12 2025-12-31 13F IDEAYA BIOSCIENCES COM 45166A102 938,857 441,809 88.89 32,456 139.99 0.0068
2025-11-12 2025-09-30 13F IDEAYA BIOSCIENCES COM 45166A102 497,048 326,376 191.23 13,525 277.03 0.0029
2025-08-12 2025-06-30 13F IDEAYA BIOSCIENCES COM 45166A102 170,672 89,475 110.19 3,588 169.70 0.0008
2025-05-13 2025-03-31 13F IDEAYA BIOSCIENCES COM 45166A102 81,197 -265,568 -76.58 1,330 -85.07 0.0003
2025-02-13 2024-12-31 13F IDEAYA BIOSCIENCES COM 45166A102 346,765 -29,588 -7.86 8,910 -25.25 0.0021
2024-11-07 2024-09-30 13F IDEAYA BIOSCIENCES COM 45166A102 376,353 -718,519 -65.63 11,921 -68.99 0.0029
2024-08-09 2024-06-30 13F IDEAYA BIOSCIENCES COM 45166A102 1,094,872 -269,467 -19.75 38,437 -35.80 0.0100
2024-05-10 2024-03-31 13F IDEAYA BIOSCIENCES COM 45166A102 1,364,339 78,039 6.07 59,867 30.81 0.0162
2024-02-07 2023-12-31 13F IDEAYA BIOSCIENCES COM 45166A102 1,286,300 144,058 12.61 45,767 48.52 0.0134
2023-11-09 2023-09-30 13F IDEAYA BIOSCIENCES COM 45166A102 1,142,242 55,893 5.15 30,817 20.71 0.0101
2023-08-09 2023-06-30 13F IDEAYA BIOSCIENCES COM 45166A102 1,086,349 49,898 4.81 25,529 79.41 0.0081
2023-05-12 2023-03-31 13F IDEAYA BIOSCIENCES COM 45166A102 1,036,451 309,135 42.50 14,230 109,353.85 0.0048
2023-02-09 2022-12-31 13F IDEAYA BIOSCIENCES COM 45166A102 727,316 131,984 22.17 13 -99.85 0.0039
2022-11-10 2022-09-30 13F IDEAYA BIOSCIENCES COM 45166A102 595,332 98,603 19.85 8,881 29.57 0.0034
2022-08-12 2022-06-30 13F IDEAYA BIOSCIENCES COM 45166A102 496,729 71,546 16.83 6,854 44.05 0.0025
2022-05-13 2022-03-31 13F IDEAYA BIOSCIENCES COM 45166A102 425,183 153,022 56.22 4,758 -26.05 0.0015
2022-02-09 2021-12-31 13F IDEAYA BIOSCIENCES COM 45166A102 272,161 180,471 196.83 6,434 175.31 0.0019
2021-11-12 2021-09-30 13F IDEAYA BIOSCIENCES COM 45166A102 91,690 91,690 2,337 0.0008
2021-05-14 2021-03-31 13F IDEAYA BIOSCIENCES COM 45166A102 0 -41,067 -100.00 0 -100.00
2021-03-08 2020-12-31 13F/A-2 IDEAYA BIOSCIENCES COM 45166A102 41,067 12,816 45.36 573 62.32 0.0002
2021-02-11 2020-12-31 13F IDEAYA BIOSCIENCES COM 45166A102 41,067 12,816 573 206.9371
2020-11-12 2020-09-30 13F IDEAYA BIOSCIENCES COM 45166A102 28,251 28,251 353 0.0001
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.