IDEAYA 바이오사이언스, Inc.
US ˙ NasdaqGS ˙ US45166A1025

SecurityIDYA / IDEAYA Biosciences, Inc.
InstitutionUBS Group AG
Latest Disclosed Ownership762,548 shares
Latest Disclosed Value $ 25,408,099
UBS Group AG reports 29.76% decrease in ownership of IDYA / IDEAYA Biosciences, Inc.

On May 5, 2026 - UBS Group AG filed a 13F-HR form disclosing ownership of 762,548 shares of IDEAYA Biosciences, Inc. (US:IDYA) valued at $25,408,099 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 29, 2026 disclosing 1,085,632 shares of IDEAYA Biosciences, Inc.. This represents a change in shares of -29.76% during the quarter. The current value of the position is $22,281,653 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-05 2026-03-31 13F IDEAYA BIOSCIENCES COM 45166A102 762,548 -323,084 -29.76 25,408 -32.30 0.0007
2026-01-29 2025-12-31 13F IDEAYA BIOSCIENCES COM 45166A102 1,085,632 29,055 2.75 37,530 30.54 0.0061
2025-11-13 2025-09-30 13F IDEAYA BIOSCIENCES COM 45166A102 1,056,577 304,672 40.52 28,749 81.90 0.0045
2025-08-14 2025-06-30 13F IDEAYA BIOSCIENCES COM 45166A102 751,905 301,758 67.04 15,805 114.36 0.0027
2025-05-13 2025-03-31 13F IDEAYA BIOSCIENCES COM 45166A102 450,147 31,662 7.57 7,373 -31.45 0.0014
2025-02-14 2024-12-31 13F IDEAYA BIOSCIENCES COM 45166A102 418,485 278,938 199.89 10,755 143.33 0.0020
2024-11-14 2024-09-30 13F IDEAYA BIOSCIENCES COM 45166A102 139,547 -89,258 -39.01 4,421 -44.98 0.0010
2024-08-14 2024-06-30 13F IDEAYA BIOSCIENCES COM 45166A102 228,805 -14,244 -5.86 8,033 -24.67 0.0020
2024-05-13 2024-03-31 13F IDEAYA BIOSCIENCES COM 45166A102 243,049 92,347 61.28 10,665 98.92 0.0027
2024-02-09 2023-12-31 13F IDEAYA BIOSCIENCES COM 45166A102 150,702 94,167 166.56 5,362 251.54 0.0016
2023-11-09 2023-09-30 13F IDEAYA BIOSCIENCES COM 45166A102 56,535 47,486 524.77 1,525 619.34 0.0005
2023-08-11 2023-06-30 13F IDEAYA BIOSCIENCES COM 45166A102 9,049 -47,405 -83.97 213 -72.65 0.0001
2023-05-12 2023-03-31 13F IDEAYA BIOSCIENCES COM 45166A102 56,454 -58,149 -50.74 775 -62.78 0.0003
2023-02-08 2022-12-31 13F IDEAYA BIOSCIENCES COM 45166A102 114,603 99,753 671.74 2,082 837.84 0.0008
2022-11-10 2022-09-30 13F IDEAYA BIOSCIENCES COM 45166A102 14,850 10,244 222.41 222 246.88 0.0001
2022-08-10 2022-06-30 13F IDEAYA BIOSCIENCES COM 45166A102 4,606 -71,765 -93.97 64 -92.51 0.0000
2022-05-16 2022-03-31 13F IDEAYA BIOSCIENCES COM 45166A102 76,371 -40,996 -34.93 854 -69.21 0.0003
2022-02-14 2021-12-31 13F IDEAYA BIOSCIENCES COM 45166A102 117,367 72,996 164.51 2,774 145.27 0.0008
2021-11-15 2021-09-30 13F IDEAYA BIOSCIENCES COM 45166A102 44,371 21,160 91.16 1,131 132.24 0.0004
2021-08-13 2021-06-30 13F IDEAYA BIOSCIENCES COM 45166A102 23,211 10,846 87.72 487 67.35 0.0002
2021-05-12 2021-03-31 13F IDEAYA BIOSCIENCES COM 45166A102 12,365 11,506 1,339.46 291 2,325.00 0.0001
2021-02-11 2020-12-31 13F IDEAYA BIOSCIENCES COM 45166A102 859 601 232.95 12 300.00 0.0000
2020-11-12 2020-09-30 13F IDEAYA BIOSCIENCES COM 45166A102 258 -3,557 -93.24 3 -94.44 0.0000
2020-07-31 2020-06-30 13F IDEAYA BIOSCIENCES COM 45166A102 3,815 3,113 443.45 54 1,700.00 0.0000
2020-05-01 2020-03-31 13F IDEAYA BIOSCIENCES COM 45166A102 702 702 3 0.0000
2020-02-14 2019-12-31 13F IDEAYA BIOSCIENCES COM 45166A102 0 -3,023 -100.00 0 -100.00
2019-11-14 2019-09-30 13F IDEAYA BIOSCIENCES COM 45166A102 3,023 3,023 27 0.0000
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.