United States Biotechnology & Medical Research

IDEAYA Biosciences Inc (IDYA)

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IDEAYA Biosciences Inc. recorded two insider transactions over the past ninety days, both involving sales by Chief Accounting Officer Andres Ruiz Briseno. These disposals totaled approximately 764,262 dollars. The company stock has appreciated 28.8 percent recently, following a period where the last results financiers showed a slight earnings miss.
Ticker: IDYA Exchange: NSM
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• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Buy signal Sell signal Earnings
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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.

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Planned sale 7 Jul 2026
Value US$3,419,337.80 | Price 440.42 | Shares 55,326 (+28.1%)
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
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
Ruiz Briseno Andres

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
Andres Ruiz Briseno

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
2.8
Stein Jeffrey
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
Jason Throne

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
WHITE MICHAEL ANTHONY

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
WHITE MICHAEL ANTHONY

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
Michael White

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
Hata Yujiro S

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
Hata Yujiro S

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
Hata Yujiro S

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
Hata Yujiro S

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
Hata Yujiro S

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
Hata Yujiro S

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
Hata Yujiro S

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
YUJIRO HATA

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
Ruiz Briseno Andres

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
Hata Yujiro S

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
Andres Ruiz Briseno

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
Hata Yujiro S

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
Hata Yujiro S

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
Hata Yujiro S

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
YUJIRO HATA

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
Ruiz Briseno Andres

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
Hata Yujiro S

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
Ruiz Briseno Andres

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
Hata Yujiro S

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
Andres Ruiz Briseno

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
YUJIRO HATA

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
Paul Stone

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
Throne Jason

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
Hata Yujiro S

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
YUJIRO HATA

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
Jason Throne

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
Ruiz Briseno Andres

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
Ruiz Briseno Andres

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
Andres Ruiz Briseno

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
Paul Stone

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
Paul Stone

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
Paul Stone

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
Paul Stone

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
Throne Jason

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
Throne Jason

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
Throne Jason

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
Throne Jason

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
Ruiz Briseno Andres

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
Throne Jason

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
Jason Throne

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
Stone Paul A.

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
Stone Paul A.

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
Stone Paul A.

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
Stone Paul A.

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
Stone Paul A.

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
Throne Jason

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
Stone Paul A.

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
Paul Stone

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
Throne Jason

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
Jason Throne

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
Throne Jason

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
Throne Jason

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
Throne Jason

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
Jason Throne

affiliate
4,485
21.42
US$96,087 		4,485 21.42 US$96,087
2021-10-07 2021-10-04 PlS Planned sale
Dillon Michael P.

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
Dillon Michael P.

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
Dillon Michael P.

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
Dillon Michael P.

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
Dillon Michael P.

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
Throne Jason

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
Throne Jason

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
Throne Jason

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
Throne Jason

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
Dillon Michael P.

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
Dillon Michael P.

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
3.3
Lackner Mark

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
Dillon Michael P.

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
3.3
Lackner Mark

SVP, Head of Biology

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