IDEAYA Biosciences, Inc.
US ˙ NasdaqGS ˙ US45166A1025

SecurityIDYA / IDEAYA Biosciences, Inc.
InstitutionAlliancebernstein L.p.
Latest Disclosed Ownership100,786 shares
Latest Disclosed Value $ 3,484,172
Alliancebernstein L.p. reports 2.96% increase in ownership of IDYA / IDEAYA Biosciences, Inc.

On May 15, 2026 - Alliancebernstein L.p. filed a 13F-HR form disclosing ownership of 100,786 shares of IDEAYA Biosciences, Inc. (US:IDYA) valued at $3,358,190 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 97,886 shares of IDEAYA Biosciences, Inc.. This represents a change in shares of 2.96% during the quarter. The current value of the position is $2,944,967 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)
2026-05-15 2026-03-31 13F IDEAYA BIOSCIENCES COM 45166A102 100,786 2,900 2.96 3,484 2.99 0.0011
2026-02-17 2025-12-31 13F IDEAYA BIOSCIENCES COM 45166A102 97,886 -3 -0.00 3,384 27.04 0.0011
2025-11-14 2025-09-30 13F IDEAYA BIOSCIENCES COM 45166A102 97,889 59 0.06 2,664 29.52 0.0008
2025-08-14 2025-06-30 13F IDEAYA BIOSCIENCES COM 45166A102 97,830 0 0.00 2,056 28.34 0.0007
2025-05-15 2025-03-31 13F IDEAYA BIOSCIENCES COM 45166A102 97,830 0 0.00 1,602 -36.28 0.0006
2025-02-12 2024-12-31 13F IDEAYA BIOSCIENCES COM 45166A102 97,830 0 0.00 2,514 -18.88 0.0009
2024-11-14 2024-09-30 13F IDEAYA BIOSCIENCES COM 45166A102 97,830 18,520 23.35 3,099 11.31 0.0010
2024-08-14 2024-06-30 13F IDEAYA BIOSCIENCES COM 45166A102 79,310 12,810 19.26 2,785 -4.59 0.0010
2024-05-14 2024-03-31 13F IDEAYA BIOSCIENCES COM 45166A102 66,500 8,820 15.29 2,918 42.20 0.0010
2024-02-14 2023-12-31 13F IDEAYA BIOSCIENCES COM 45166A102 57,680 7,140 14.13 2,052 50.55 0.0008
2023-11-14 2023-09-30 13F IDEAYA BIOSCIENCES COM 45166A102 50,540 1,100 2.22 1,364 17.40 0.0006
2023-08-15 2023-06-30 13F IDEAYA BIOSCIENCES COM 45166A102 49,440 17,640 55.47 1,162 166.28 0.0005
2023-05-15 2023-03-31 13F IDEAYA BIOSCIENCES COM 45166A102 31,800 5,100 19.10 437 -10.10 0.0002
2023-02-15 2022-12-31 13F IDEAYA BIOSCIENCES COM 45166A102 26,700 4,300 19.20 485 45.21 0.0002
2022-11-15 2022-09-30 13F IDEAYA BIOSCIENCES COM 45166A102 22,400 0 0.00 334 8.09 0.0002
2022-08-15 2022-06-30 13F IDEAYA BIOSCIENCES COM 45166A102 22,400 -24,161 -51.89 309 -40.69 0.0001
2022-05-13 2022-03-31 13F IDEAYA BIOSCIENCES COM 45166A102 46,561 -42,769 -47.88 521 -75.33 0.0002
2022-02-14 2021-12-31 13F IDEAYA BIOSCIENCES COM 45166A102 89,330 3,400 3.96 2,112 -3.56 0.0007
2021-11-10 2021-09-30 13F IDEAYA BIOSCIENCES COM 45166A102 85,930 0 0.00 2,190 21.40 0.0009
2021-07-30 2021-06-30 13F IDEAYA BIOSCIENCES COM 45166A102 85,930 72,930 561.00 1,804 489.54 0.0007
2021-05-06 2021-03-31 13F IDEAYA BIOSCIENCES COM 45166A102 13,000 -6,400 -32.99 306 12.50 0.0001
2021-02-08 2020-12-31 13F IDEAYA BIOSCIENCES COM 45166A102 19,400 0 0.00 272 11.48 0.0001
2020-11-12 2020-09-30 13F IDEAYA BIOSCIENCES COM 45166A102 19,400 -1,700 -8.06 244 -18.67 0.0001
2020-08-13 2020-06-30 13F IDEAYA BIOSCIENCES COM 45166A102 21,100 21,100 300 0.0002
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.