IDEAYA Biosciences Inc (IDYA)

IDEAYA Biosciences experienced two notable insider trading transactions recently, both involving planned sales by Andres Ruiz Briseno in July 2026. These divestments totaled approximately 764,262 dollars. The activity follows the company's August 2026 results financiers, where earnings per share missed expectations by 3.39 percent, amid a 10 percent stock price increase over the last quarter.
Ticker: IDYA Exchange: NSM


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Insider trades have triggered activity signals for IDEAYA Biosciences Inc. Upgrade to see score, net flow, insiders and the full signal context.

Top insiders
Trades
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
Ruiz Briseno Andres Chief Accounting Officer Officer
Transaction date
Planned sale
Price
440.42
Quantity 55,326 +28.1%
Value US$3,419,338
Transaction date
Proposed sale
Price
287.56
Quantity 24,081
Value US$3,787,649
2.8
Stein Jeffrey Non-Executive Director
Transaction date
Purchase
Price
158.40
Quantity 45,596 +30.7%
Value US$4,144,160
Jason Throne Former Officer Officer
Transaction date
Proposed sale
Price
40.22
Quantity 75,000
Value US$3,016,500
WHITE MICHAEL ANTHONY Chief Scientific Officer Officer
Transaction date
Planned sale
Price
36.78
Quantity 851 -100.0%
Value US$31,297
WHITE MICHAEL ANTHONY Chief Scientific Officer Officer
Transaction date
Planned sale
Price
36.23
Quantity 27,649 -97.0%
Value US$1,001,588
Michael White Officer Officer
Transaction date
Proposed sale
Price
37.00
Quantity 28,500
Value US$1,054,500
Hata Yujiro S President and CEO Executive Director
Transaction date
Planned sale
Price
42.37
Quantity 4,349 -0.6%
Value US$184,250
Hata Yujiro S President and CEO Executive Director
Transaction date
Planned sale
Price
41.73
Quantity 30,084 -4.2%
Value US$1,255,505
Hata Yujiro S President and CEO Executive Director
Transaction date
Planned sale
Price
44.12
Quantity 503 -0.1%
Value US$22,191
Hata Yujiro S President and CEO Executive Director
Transaction date
Planned sale
Price
43.48
Quantity 29,761 -4.2%
Value US$1,293,934
Hata Yujiro S President and CEO Executive Director
Transaction date
Planned sale
Price
42.57
Quantity 53,592 -7.0%
Value US$2,281,631
Hata Yujiro S President and CEO Executive Director
Transaction date
Planned sale
Price
41.84
Quantity 2,303 -0.3%
Value US$96,348
Hata Yujiro S President and CEO Executive Director
Transaction date
Planned sale
Price
41.60
Quantity 54,408 -7.4%
Value US$2,263,433
Transaction date
Proposed sale
Price
41.36
Quantity 175,000
Value US$7,238,000
Ruiz Briseno Andres See Remarks Officer
Transaction date
Planned sale
Price
46.02
Quantity 2,000 -7.5%
Value US$92,045
Hata Yujiro S President and CEO Executive Director
Transaction date
Planned sale
Price
45.54
Quantity 23,557 -3.4%
Value US$1,072,715
Transaction date
Proposed sale
Price
45.60
Quantity 14,867
Value US$677,935
Hata Yujiro S President and CEO Executive Director
Transaction date
Planned sale
Price
45.15
Quantity 75,815 -10.1%
Value US$3,422,835
Hata Yujiro S President and CEO Executive Director
Transaction date
Planned sale
Price
45.01
Quantity 4 -0.0%
Value US$180
Hata Yujiro S President and CEO Executive Director
Transaction date
Planned sale
Price
45.00
Quantity 624 -0.1%
Value US$28,080
Transaction date
Proposed sale
Price
45.00
Quantity 100,000
Value US$4,500,000
Ruiz Briseno Andres See Remarks Officer
Transaction date
Planned sale
Price
42.03
Quantity 2,000 -7.0%
Value US$84,050
Hata Yujiro S President and CEO Executive Director
Transaction date
Planned sale
Price
40.17
Quantity 62,739 -8.5%
Value US$2,519,968
Ruiz Briseno Andres See Remarks Officer
Transaction date
Planned sale
Price
38.01
Quantity 2,000 -6.6%
Value US$76,026
Hata Yujiro S President and CEO Executive Director
Transaction date
Planned sale
Price
40.04
Quantity 12,261 -1.8%
Value US$490,913
Transaction date
Proposed sale
Price
37.37
Quantity 4,000
Value US$149,480
Transaction date
Proposed sale
Price
40.00
Quantity 75,000
Value US$3,000,000
Paul Stone Officer Officer
Transaction date
Proposed sale
Price
35.04
Quantity 55,680
Value US$1,951,027
Throne Jason Chief Legal Officer Officer
Transaction date
Planned sale
Price
35.04
Quantity 10,000 -100.0%
Value US$350,371
Hata Yujiro S President and CEO Executive Director
Transaction date
Planned sale
Price
35.03
Quantity 75,000 -10.0%
Value US$2,627,618
Transaction date
Proposed sale
Price
35.03
Quantity 75,000
Value US$2,627,619
Jason Throne Officer Officer
Transaction date
Proposed sale
Price
35.04
Quantity 10,000
Value US$350,370
Ruiz Briseno Andres See Remarks Officer
Transaction date
Planned sale
Price
34.01
Quantity 328 -1.1%
Value US$11,154
Ruiz Briseno Andres See Remarks Officer
Transaction date
Planned sale
Price
34.00
Quantity 1,672 -5.1%
Value US$56,848
Transaction date
Proposed sale
Price
34.01
Quantity 2,000
Value US$68,016
Paul Stone Officer Officer
Transaction date
Proposed sale
Price
31.50
Quantity 44,875
Value US$1,413,562
Paul Stone Officer Officer
Transaction date
Proposed sale
Price
32.41
Quantity 42,964
Value US$1,392,463
Paul Stone Officer Officer
Transaction date
Proposed sale
Price
30.00
Quantity 39,450
Value US$1,183,500
Paul Stone Officer Officer
Transaction date
Proposed sale
Price
31.53
Quantity 46,654
Value US$1,471,000
Throne Jason Chief Legal Officer Officer
Transaction date
Planned sale
Price
30.09
Quantity 5,163 -100.0%
Value US$155,360
Throne Jason Chief Legal Officer Officer
Transaction date
Planned sale
Price
30.01
Quantity 500 -100.0%
Value US$15,005
Throne Jason Chief Legal Officer Officer
Transaction date
Planned sale
Price
30.00
Quantity 500 -50.0%
Value US$15,000
Throne Jason Chief Legal Officer Officer
Transaction date
Planned sale
Price
30.03
Quantity 1,737 -100.0%
Value US$52,160
Ruiz Briseno Andres See Remarks Officer
Transaction date
Planned sale
Price
30.01
Quantity 2,000 -5.8%
Value US$60,016
Throne Jason Chief Legal Officer Officer
Transaction date
Planned sale
Price
30.03
Quantity 2,100 -100.0%
Value US$63,063
Jason Throne Officer Officer
Transaction date
Proposed sale
Price
30.00
Quantity 20,000
Value US$600,000
Stone Paul A. Chief Financial Officer Officer
Transaction date
Planned sale
Price
28.87
Quantity 5,000 -35.0%
Value US$144,352
Stone Paul A. Chief Financial Officer Officer
Transaction date
Planned sale
Price
26.40
Quantity 978 -6.4%
Value US$25,819
Stone Paul A. Chief Financial Officer Officer
Transaction date
Planned sale
Price
26.38
Quantity 3,822 -20.0%
Value US$100,820
Stone Paul A. Chief Financial Officer Officer
Transaction date
Planned sale
Price
26.40
Quantity 100 -0.5%
Value US$2,640
Stone Paul A. Chief Financial Officer Officer
Transaction date
Planned sale
Price
26.45
Quantity 100 -0.5%
Value US$2,645
Throne Jason Chief Legal Officer Officer
Transaction date
Planned sale
Price
25.09
Quantity 5,000 -100.0%
Value US$125,430
Stone Paul A. Chief Financial Officer Officer
Transaction date
Planned sale
Price
25.05
Quantity 2,500 -11.5%
Value US$62,613
Paul Stone Officer Officer
Transaction date
Proposed sale
Price
25.00
Quantity 12,500
Value US$312,500
Throne Jason Chief Legal Officer Officer
Transaction date
Planned sale
Price
23.00
Quantity 9,485 -100.0%
Value US$218,178
Jason Throne Officer Officer
Transaction date
Proposed sale
Price
22.81
Quantity 14,485
Value US$330,403
Throne Jason Chief Legal Officer Officer
Transaction date
Planned sale
Price
23.02
Quantity 3,553 -100.0%
Value US$81,792
Throne Jason Chief Legal Officer Officer
Transaction date
Planned sale
Price
23.00
Quantity 432 -100.0%
Value US$9,938
Throne Jason Chief Legal Officer Officer
Transaction date
Planned sale
Price
23.00
Quantity 500 -100.0%
Value US$11,500
Jason Throne affiliate
Transaction date
Proposed sale
Price
21.42
Quantity 4,485
Value US$96,087
Dillon Michael P. SVP, Chief Scientific Officer Officer
Transaction date
Planned sale
Price
26.62
Quantity 1,000 -1.3%
Value US$26,621
Dillon Michael P. SVP, Chief Scientific Officer Officer
Transaction date
Planned sale
Price
25.85
Quantity 500 -0.6%
Value US$12,924
Dillon Michael P. SVP, Chief Scientific Officer Officer
Transaction date
Planned sale
Price
23.52
Quantity 400 -0.4%
Value US$9,406
Dillon Michael P. SVP, Chief Scientific Officer Officer
Transaction date
Planned sale
Price
22.96
Quantity 11,100 -11.1%
Value US$254,863
Dillon Michael P. SVP, Chief Scientific Officer Officer
Transaction date
Planned sale
Price
25.15
Quantity 10,000 -9.2%
Value US$251,460
Throne Jason SVP, General Counsel Officer
Transaction date
Planned sale
Price
22.68
Quantity 359 -100.0%
Value US$8,140
Throne Jason SVP, General Counsel Officer
Transaction date
Planned sale
Price
22.16
Quantity 2,031 -85.0%
Value US$45,015
Throne Jason SVP, General Counsel Officer
Transaction date
Planned sale
Price
22.68
Quantity 1,142 -32.3%
Value US$25,895
Throne Jason SVP, General Counsel Officer
Transaction date
Planned sale
Price
22.16
Quantity 6,468 -64.7%
Value US$143,357
Dillon Michael P. SVP, Chief Scientific Officer Officer
Transaction date
Planned sale
Price
20.22
Quantity 1,500 -1.5%
Value US$30,333
Dillon Michael P. SVP, Chief Scientific Officer Officer
Transaction date
Planned sale
Price
20.22
Quantity 5,000 -4.8%
Value US$101,092
3.3
Lackner Mark SVP, Head of Biology Officer
Transaction date
Planned sale
Price
21.00
Quantity 596 -100.0%
Value US$12,516
Dillon Michael P. SVP, Chief Scientific Officer Officer
Transaction date
Planned sale
Price
20.74
Quantity 5,000 -4.8%
Value US$103,696
3.3
Lackner Mark SVP, Head of Biology Officer
Transaction date
Planned sale
Price
21.05
Quantity 1,104 -100.0%
Value US$23,234
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value
Number of shares Price Value Details
2026-07-09 2026-07-07 PlS Planned sale

Chief Accounting Officer

Officer
55,326 +28.1%
440.42
US$3,419,338
55,326 +28.1% 440.42 US$3,419,338
2026-07-07 2026-07-07 PrS Proposed sale

Senior VP

24,081
287.56
US$3,787,649
24,081 287.56 US$3,787,649
2026-03-02 2026-03-02 B Purchase Non-Executive Director
45,596 +30.7%
158.40
US$4,144,160
45,596 +30.7% 158.40 US$4,144,160
2024-08-26 2024-08-26 PrS Proposed sale

Former Officer

Officer
75,000
40.22
US$3,016,500
75,000 40.22 US$3,016,500
2024-05-31 2024-05-29 PlS Planned sale

Chief Scientific Officer

Officer
851 -100.0%
36.78
US$31,297
851 -100.0% 36.78 US$31,297
2024-05-31 2024-05-29 PlS Planned sale

Chief Scientific Officer

Officer
27,649 -97.0%
36.23
US$1,001,588
27,649 -97.0% 36.23 US$1,001,588
2024-05-29 2024-05-29 PrS Proposed sale

Officer

Officer
28,500
37.00
US$1,054,500
28,500 37.00 US$1,054,500
2024-05-16 2024-05-16 PlS Planned sale

President and CEO

Executive Director
4,349 -0.6%
42.37
US$184,250
4,349 -0.6% 42.37 US$184,250
2024-05-16 2024-05-16 PlS Planned sale

President and CEO

Executive Director
30,084 -4.2%
41.73
US$1,255,505
30,084 -4.2% 41.73 US$1,255,505
2024-05-16 2024-05-15 PlS Planned sale

President and CEO

Executive Director
503 -0.1%
44.12
US$22,191
503 -0.1% 44.12 US$22,191
2024-05-16 2024-05-15 PlS Planned sale

President and CEO

Executive Director
29,761 -4.2%
43.48
US$1,293,934
29,761 -4.2% 43.48 US$1,293,934
2024-05-16 2024-05-15 PlS Planned sale

President and CEO

Executive Director
53,592 -7.0%
42.57
US$2,281,631
53,592 -7.0% 42.57 US$2,281,631
2024-05-16 2024-05-14 PlS Planned sale

President and CEO

Executive Director
2,303 -0.3%
41.84
US$96,348
2,303 -0.3% 41.84 US$96,348
2024-05-16 2024-05-14 PlS Planned sale

President and CEO

Executive Director
54,408 -7.4%
41.60
US$2,263,433
54,408 -7.4% 41.60 US$2,263,433
2024-05-14 2024-05-14 PrS Proposed sale

CEO

175,000
41.36
US$7,238,000
175,000 41.36 US$7,238,000
2024-02-13 2024-02-09 PlS Planned sale

See Remarks

Officer
2,000 -7.5%
46.02
US$92,045
2,000 -7.5% 46.02 US$92,045
2024-02-12 2024-02-09 PlS Planned sale

President and CEO

Executive Director
23,557 -3.4%
45.54
US$1,072,715
23,557 -3.4% 45.54 US$1,072,715
2024-02-09 2024-02-09 PrS Proposed sale

Senior VP

14,867
45.60
US$677,935
14,867 45.60 US$677,935
2024-02-12 2024-02-08 PlS Planned sale

President and CEO

Executive Director
75,815 -10.1%
45.15
US$3,422,835
75,815 -10.1% 45.15 US$3,422,835
2024-02-05 2024-02-01 PlS Planned sale

President and CEO

Executive Director
4 -0.0%
45.01
US$180
4 -0.0% 45.01 US$180
2024-02-05 2024-02-01 PlS Planned sale

President and CEO

Executive Director
624 -0.1%
45.00
US$28,080
624 -0.1% 45.00 US$28,080
2024-02-01 2024-02-01 PrS Proposed sale

CEO

100,000
45.00
US$4,500,000
100,000 45.00 US$4,500,000
2024-01-24 2024-01-22 PlS Planned sale

See Remarks

Officer
2,000 -7.0%
42.03
US$84,050
2,000 -7.0% 42.03 US$84,050
2024-01-17 2024-01-16 PlS Planned sale

President and CEO

Executive Director
62,739 -8.5%
40.17
US$2,519,968
62,739 -8.5% 40.17 US$2,519,968
2024-01-17 2024-01-12 PlS Planned sale

See Remarks

Officer
2,000 -6.6%
38.01
US$76,026
2,000 -6.6% 38.01 US$76,026
2024-01-17 2024-01-12 PlS Planned sale

President and CEO

Executive Director
12,261 -1.8%
40.04
US$490,913
12,261 -1.8% 40.04 US$490,913
2024-01-12 2024-01-12 PrS Proposed sale

Senior VP

4,000
37.37
US$149,480
4,000 37.37 US$149,480
2024-01-12 2024-01-12 PrS Proposed sale

CEO

75,000
40.00
US$3,000,000
75,000 40.00 US$3,000,000
2023-12-27 2023-12-27 PrS Proposed sale

Officer

Officer
55,680
35.04
US$1,951,027
55,680 35.04 US$1,951,027
2023-12-19 2023-12-15 PlS Planned sale

Chief Legal Officer

Officer
10,000 -100.0%
35.04
US$350,371
10,000 -100.0% 35.04 US$350,371
2023-12-19 2023-12-15 PlS Planned sale

President and CEO

Executive Director
75,000 -10.0%
35.03
US$2,627,618
75,000 -10.0% 35.03 US$2,627,618
2023-12-15 2023-12-15 PrS Proposed sale

CEO

75,000
35.03
US$2,627,619
75,000 35.03 US$2,627,619
2023-12-15 2023-12-15 PrS Proposed sale

Officer

Officer
10,000
35.04
US$350,370
10,000 35.04 US$350,370
2023-12-18 2023-12-14 PlS Planned sale

See Remarks

Officer
328 -1.1%
34.01
US$11,154
328 -1.1% 34.01 US$11,154
2023-12-18 2023-12-14 PlS Planned sale

See Remarks

Officer
1,672 -5.1%
34.00
US$56,848
1,672 -5.1% 34.00 US$56,848
2023-12-14 2023-12-14 PrS Proposed sale

Senior VP

2,000
34.01
US$68,016
2,000 34.01 US$68,016
2023-12-11 2023-12-11 PrS Proposed sale

Officer

Officer
44,875
31.50
US$1,413,562
44,875 31.50 US$1,413,562
2023-12-04 2023-12-04 PrS Proposed sale

Officer

Officer
42,964
32.41
US$1,392,463
42,964 32.41 US$1,392,463
2023-11-28 2023-11-28 PrS Proposed sale

Officer

Officer
39,450
30.00
US$1,183,500
39,450 30.00 US$1,183,500
2023-11-27 2023-11-27 PrS Proposed sale

Officer

Officer
46,654
31.53
US$1,471,000
46,654 31.53 US$1,471,000
2023-11-07 2023-11-03 PlS Planned sale

Chief Legal Officer

Officer
5,163 -100.0%
30.09
US$155,360
5,163 -100.0% 30.09 US$155,360
2023-09-14 2023-09-12 PlS Planned sale

Chief Legal Officer

Officer
500 -100.0%
30.01
US$15,005
500 -100.0% 30.01 US$15,005
2023-09-14 2023-09-12 PlS Planned sale

Chief Legal Officer

Officer
500 -50.0%
30.00
US$15,000
500 -50.0% 30.00 US$15,000
2023-09-06 2023-09-05 PlS Planned sale

Chief Legal Officer

Officer
1,737 -100.0%
30.03
US$52,160
1,737 -100.0% 30.03 US$52,160
2023-09-06 2023-09-01 PlS Planned sale

See Remarks

Officer
2,000 -5.8%
30.01
US$60,016
2,000 -5.8% 30.01 US$60,016
2023-09-06 2023-09-01 PlS Planned sale

Chief Legal Officer

Officer
2,100 -100.0%
30.03
US$63,063
2,100 -100.0% 30.03 US$63,063
2023-09-01 2023-09-01 PrS Proposed sale

Officer

Officer
20,000
30.00
US$600,000
20,000 30.00 US$600,000
2023-08-31 2023-08-29 PlS Planned sale

Chief Financial Officer

Officer
5,000 -35.0%
28.87
US$144,352
5,000 -35.0% 28.87 US$144,352
2023-08-23 2023-08-21 PlS Planned sale

Chief Financial Officer

Officer
978 -6.4%
26.40
US$25,819
978 -6.4% 26.40 US$25,819
2023-08-18 2023-08-18 PlS Planned sale

Chief Financial Officer

Officer
3,822 -20.0%
26.38
US$100,820
3,822 -20.0% 26.38 US$100,820
2023-08-18 2023-08-16 PlS Planned sale

Chief Financial Officer

Officer
100 -0.5%
26.40
US$2,640
100 -0.5% 26.40 US$2,640
2023-08-18 2023-08-16 PlS Planned sale

Chief Financial Officer

Officer
100 -0.5%
26.45
US$2,645
100 -0.5% 26.45 US$2,645
2023-08-11 2023-08-09 PlS Planned sale

Chief Legal Officer

Officer
5,000 -100.0%
25.09
US$125,430
5,000 -100.0% 25.09 US$125,430
2023-08-11 2023-08-09 PlS Planned sale

Chief Financial Officer

Officer
2,500 -11.5%
25.05
US$62,613
2,500 -11.5% 25.05 US$62,613
2023-08-09 2023-08-09 PrS Proposed sale

Officer

Officer
12,500
25.00
US$312,500
12,500 25.00 US$312,500
2023-07-12 2023-07-10 PlS Planned sale

Chief Legal Officer

Officer
9,485 -100.0%
23.00
US$218,178
9,485 -100.0% 23.00 US$218,178
2023-07-10 2023-07-10 PrS Proposed sale

Officer

Officer
14,485
22.81
US$330,403
14,485 22.81 US$330,403
2023-06-02 2023-06-01 PlS Planned sale

Chief Legal Officer

Officer
3,553 -100.0%
23.02
US$81,792
3,553 -100.0% 23.02 US$81,792
2023-06-02 2023-05-31 PlS Planned sale

Chief Legal Officer

Officer
432 -100.0%
23.00
US$9,938
432 -100.0% 23.00 US$9,938
2023-05-24 2023-05-22 PlS Planned sale

Chief Legal Officer

Officer
500 -100.0%
23.00
US$11,500
500 -100.0% 23.00 US$11,500
2023-05-22 2023-05-22 PrS Proposed sale

affiliate

4,485
21.42
US$96,087
4,485 21.42 US$96,087
2021-10-07 2021-10-04 PlS Planned sale

SVP, Chief Scientific Officer

Officer
1,000 -1.3%
26.62
US$26,621
1,000 -1.3% 26.62 US$26,621
2021-10-07 2021-10-04 PlS Planned sale

SVP, Chief Scientific Officer

Officer
500 -0.6%
25.85
US$12,924
500 -0.6% 25.85 US$12,924
2021-08-11 2021-08-09 PlS Planned sale

SVP, Chief Scientific Officer

Officer
400 -0.4%
23.52
US$9,406
400 -0.4% 23.52 US$9,406
2021-08-11 2021-08-09 PlS Planned sale

SVP, Chief Scientific Officer

Officer
11,100 -11.1%
22.96
US$254,863
11,100 -11.1% 22.96 US$254,863
2021-07-29 2021-07-27 PlS Planned sale

SVP, Chief Scientific Officer

Officer
10,000 -9.2%
25.15
US$251,460
10,000 -9.2% 25.15 US$251,460
2021-07-08 2021-07-06 PlS Planned sale

SVP, General Counsel

Officer
359 -100.0%
22.68
US$8,140
359 -100.0% 22.68 US$8,140
2021-07-08 2021-07-06 PlS Planned sale

SVP, General Counsel

Officer
2,031 -85.0%
22.16
US$45,015
2,031 -85.0% 22.16 US$45,015
2021-07-08 2021-07-06 PlS Planned sale

SVP, General Counsel

Officer
1,142 -32.3%
22.68
US$25,895
1,142 -32.3% 22.68 US$25,895
2021-07-08 2021-07-06 PlS Planned sale

SVP, General Counsel

Officer
6,468 -64.7%
22.16
US$143,357
6,468 -64.7% 22.16 US$143,357
2021-06-09 2021-06-07 PlS Planned sale

SVP, Chief Scientific Officer

Officer
1,500 -1.5%
20.22
US$30,333
1,500 -1.5% 20.22 US$30,333
2021-05-13 2021-05-11 PlS Planned sale

SVP, Chief Scientific Officer

Officer
5,000 -4.8%
20.22
US$101,092
5,000 -4.8% 20.22 US$101,092
2021-02-10 2021-02-10 PlS Planned sale

SVP, Head of Biology

Officer
596 -100.0%
21.00
US$12,516
596 -100.0% 21.00 US$12,516
2021-02-10 2021-02-09 PlS Planned sale

SVP, Chief Scientific Officer

Officer
5,000 -4.8%
20.74
US$103,696
5,000 -4.8% 20.74 US$103,696
2021-02-10 2021-02-09 PlS Planned sale

SVP, Head of Biology

Officer
1,104 -100.0%
21.05
US$23,234
1,104 -100.0% 21.05 US$23,234