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IDEAYA Biosciences, Inc.

IDYA Net buying
CIK 0001676725 #1584 in the set updated 17 Sep 2026
Bought (120 mo)
$24.37M
out of their own pocket, the only kind of buying there is
Sold (120 mo)
$34.91M
$719.03K on a plan · $22.05M straight out of an exercise
Sold at will
$12.14M
14 of 84 sales
Net
−$10.54M
+$12.23M against sales at will

By person

16 insiders · 119 transactions
39.4×

Yujiro S. Hata holds 39.4 times base salary in stock. $27.64M of shares against $700.00K in salary for 2025.

Salary from the company's own proxy. The shares are what Yujiro S. Hata last reported holding, valued at $40.01, the price Common Stock was last bought or sold at on the open market here, on 7 Jul 2026.

Insider
Role
Bought
Sold
Net
Holding
Of company
Worth
Change
Hata Yujiro S
President and CEO
—
$17.56M (14) scheduled
−$17.56M
690,695
0.7158%
$27.64M
+15.9%
CANAAN X L.P.
10% owner
$4.00M (1)
—
+$4.00M
2,660,713
2.76%
$106.46M
—
SHANNON TIMOTHY M
Director
$4.00M (1)
—
+$4.00M
2,660,713
2.76%
$106.46M
—
5AM Ventures IV, L.P. entity
10% owner
$7.50M (3)
$10.93M (3)
−$3.43M
384,496
0.3985%
$15.39M
—
DIEKMAN JOHN D
Director
$2.50M (2)
—
+$2.50M
118,521
0.1228%
$4.74M
—
Stone Paul A.
Chief Financial Officer
$2.50M (2)
$463.15K (9) scheduled
+$2.04M
127,824
0.1325%
$5.11M
—
Stein Jeffrey
Director
$1.65M (1)
—
+$1.65M
54,281
0.0563%
$2.17M
+1,168%
Throne Jason
Chief Legal Officer
—
$1.62M (19) scheduled
−$1.62M
63,484
0.0658%
$2.54M
+1,417%
Dillon Michael P.
SVP, Chief Scientific Officer
—
$1.50M (16) scheduled
−$1.50M
78,789
0.0817%
$3.15M
−13.5%
WHITE MICHAEL ANTHONY
Chief Scientific Officer
—
$1.03M (2) scheduled
−$1.03M
0
0.0000%
$0.00
—
BVF PARTNERS L P/IL entity
See Explanation of Responses
$1.72M (9)
$835.36K (3)
+$887.27K
233,150
0.2416%
$9.33M
+46.6%
Ruiz Briseno Andres
Chief Accounting Officer
—
$762.27K (7) scheduled
−$762.27K
26,466
0.0274%
$1.06M
−23.4%
Alexandria Venture Investments, LLC entity
10% owner
$500.00K (1)
—
+$500.00K
432,384
0.4481%
$17.30M
—
Lackner Mark
SVP, Head of Biology
—
$204.18K (11) scheduled
−$204.18K
0
0.0000%
$0.00
−100.0%
Hager Jeffrey
SVP, Chief Technology Officer
—
—
—
127,853
0.1325%
$5.12M
+19.6%
Snyder Douglas B.
SVP, General Counsel
—
—
—
2,080
0.0022%
$83.23K
—

Individual transactions

119
Insider
Date
Role
Action
Shares
Price
Amount
Ruiz Briseno Andres
7 Jul 2026
Chief Accounting Officer
Sold after exercise
9,550
$40.01
$382.13K
Stein Jeffrey
2 Mar 2026
Director
Buy
50,000
$32.96
$1.65M
Hata Yujiro S
18 Feb 2025
President and CEO
Exercised, kept
12,808
$19.52
$250.01K
Throne Jason
27 Jun 2024
Chief Legal Officer
Exercised, kept
47,060
$7.01
$329.89K
Throne Jason
27 Jun 2024
Chief Legal Officer
Exercised, kept
6,424
$13.34
$85.70K
WHITE MICHAEL ANTHONY
29 May 2024
Chief Scientific Officer
Sold after exercise
851
$36.78
$31.30K
WHITE MICHAEL ANTHONY
29 May 2024
Chief Scientific Officer
Sold after exercise
27,649
$36.23
$1.00M
Hata Yujiro S
16 May 2024
President and CEO
Sold after exercise
4,349
$42.37
$184.25K
Hata Yujiro S
16 May 2024
President and CEO
Sold after exercise
30,084
$41.73
$1.26M
Hata Yujiro S
15 May 2024
President and CEO
Sold after exercise
503
$44.12
$22.19K
Hata Yujiro S
15 May 2024
President and CEO
Sold after exercise
29,761
$43.48
$1.29M
Hata Yujiro S
15 May 2024
President and CEO
Sold after exercise
53,592
$42.57
$2.28M
Hata Yujiro S
14 May 2024
President and CEO
Sold after exercise
2,303
$41.84
$96.35K
Hata Yujiro S
14 May 2024
President and CEO
Sold after exercise
54,408
$41.60
$2.26M
Hata Yujiro S
9 Feb 2024
President and CEO
Sold after exercise
23,557
$45.54
$1.07M
Ruiz Briseno Andres
9 Feb 2024
See Remarks
Sold on a plan
2,000
$46.02
$92.04K
Hata Yujiro S
8 Feb 2024
President and CEO
Sold after exercise
75,815
$45.15
$3.42M
Hata Yujiro S
1 Feb 2024
President and CEO
Sold after exercise
4
$45.01
$180.04
Hata Yujiro S
1 Feb 2024
President and CEO
Sold after exercise
624
$45.00
$28.08K
Ruiz Briseno Andres
22 Jan 2024
See Remarks
Sold on a plan
2,000
$42.03
$84.05K
Hata Yujiro S
16 Jan 2024
President and CEO
Sold after exercise
62,739
$40.17
$2.52M
Hata Yujiro S
12 Jan 2024
President and CEO
Sold after exercise
12,261
$40.04
$490.91K
Ruiz Briseno Andres
12 Jan 2024
See Remarks
Sold on a plan
2,000
$38.01
$76.03K
Throne Jason
18 Dec 2023
Chief Legal Officer
Exercised, kept
10,000
$7.01
$70.10K
Hata Yujiro S
15 Dec 2023
President and CEO
Sold after exercise
75,000
$35.03
$2.63M
Throne Jason
15 Dec 2023
Chief Legal Officer
Sold after exercise
10,000
$35.04
$350.37K
Ruiz Briseno Andres
14 Dec 2023
See Remarks
Sold on a plan
328
$34.01
$11.15K
Ruiz Briseno Andres
14 Dec 2023
See Remarks
Sold on a plan
1,672
$34.00
$56.85K
Throne Jason
3 Nov 2023
Chief Legal Officer
Sold after exercise
5,163
$30.09
$155.36K
Throne Jason
12 Sep 2023
Chief Legal Officer
Sold after exercise
500
$30.01
$15.01K
Throne Jason
12 Sep 2023
Chief Legal Officer
Sold after exercise
500
$30.00
$15.00K
Throne Jason
5 Sep 2023
Chief Legal Officer
Sold after exercise
1,737
$30.03
$52.16K
Ruiz Briseno Andres
1 Sep 2023
See Remarks
Sold on a plan
2,000
$30.01
$60.02K
Throne Jason
1 Sep 2023
Chief Legal Officer
Sold after exercise
2,100
$30.03
$63.06K
Stone Paul A.
29 Aug 2023
Chief Financial Officer
Sold on a plan
5,000
$28.87
$144.35K
Stone Paul A.
21 Aug 2023
Chief Financial Officer
Sold on a plan
978
$26.40
$25.82K
Stone Paul A.
18 Aug 2023
Chief Financial Officer
Sold on a plan
3,822
$26.38
$100.82K
Stone Paul A.
16 Aug 2023
Chief Financial Officer
Sold on a plan
100
$26.40
$2.64K
Stone Paul A.
16 Aug 2023
Chief Financial Officer
Sold on a plan
100
$26.45
$2.65K
Stone Paul A.
9 Aug 2023
Chief Financial Officer
Sold on a plan
2,500
$25.05
$62.61K
Throne Jason
9 Aug 2023
Chief Legal Officer
Sold after exercise
5,000
$25.09
$125.43K
Throne Jason
10 Jul 2023
Chief Legal Officer
Sold after exercise
9,485
$23.00
$218.18K
Throne Jason
1 Jun 2023
Chief Legal Officer
Sold after exercise
3,553
$23.02
$81.79K
Throne Jason
31 May 2023
Chief Legal Officer
Sold after exercise
432
$23.00
$9.94K
Throne Jason
22 May 2023
Chief Legal Officer
Sold after exercise
500
$23.00
$11.50K
Stone Paul A.
13 Apr 2023
Chief Financial Officer
Exercised, kept
8,000
$4.62
$36.96K
Hata Yujiro S
12 Apr 2023
President and CEO
Exercised, kept
11,601
$4.31
$50.00K
Dillon Michael P.
4 Oct 2021
SVP, Chief Scientific Officer
Sold after exercise
1,000
$26.62
$26.62K
Dillon Michael P.
4 Oct 2021
SVP, Chief Scientific Officer
Sold after exercise
500
$25.85
$12.92K
Dillon Michael P.
8 Sep 2021
SVP, Chief Scientific Officer
Sold after exercise
200
$27.67
$5.53K
Dillon Michael P.
8 Sep 2021
SVP, Chief Scientific Officer
Sold after exercise
11,184
$27.41
$306.56K
Stone Paul A.
7 Sep 2021
SVP, Chief Financial Officer
Sell
2,500
$27.42
$68.54K
Dillon Michael P.
7 Sep 2021
SVP, Chief Scientific Officer
Sold after exercise
116
$27.46
$3.19K
Dillon Michael P.
2 Sep 2021
SVP, Chief Scientific Officer
Sell
10,000
$25.09
$250.94K
Dillon Michael P.
9 Aug 2021
SVP, Chief Scientific Officer
Sold after exercise
400
$23.52
$9.41K
Dillon Michael P.
9 Aug 2021
SVP, Chief Scientific Officer
Sold after exercise
11,100
$22.96
$254.86K
Throne Jason
27 Jul 2021
SVP, General Counsel
Sold after exercise
10,000
$25.17
$251.68K
Dillon Michael P.
27 Jul 2021
SVP, Chief Scientific Officer
Sold after exercise
10,000
$25.15
$251.46K
Throne Jason
6 Jul 2021
SVP, General Counsel
Sold after exercise
359
$22.68
$8.14K
Throne Jason
6 Jul 2021
SVP, General Counsel
Sold after exercise
2,031
$22.16
$45.02K
Throne Jason
6 Jul 2021
SVP, General Counsel
Sold after exercise
1,142
$22.68
$25.90K
Throne Jason
6 Jul 2021
SVP, General Counsel
Sold after exercise
6,468
$22.16
$143.36K
Dillon Michael P.
6 Jul 2021
SVP, Chief Scientific Officer
Sold after exercise
100
$22.76
$2.28K
Dillon Michael P.
6 Jul 2021
SVP, Chief Scientific Officer
Sold after exercise
1,400
$22.20
$31.08K
Dillon Michael P.
17 Jun 2021
SVP, Chief Scientific Officer
Sold after exercise
3,893
$22.49
$87.54K
Dillon Michael P.
16 Jun 2021
SVP, Chief Scientific Officer
Sold after exercise
1,107
$22.47
$24.87K
Dillon Michael P.
7 Jun 2021
SVP, Chief Scientific Officer
Sold after exercise
1,500
$20.22
$30.33K
Dillon Michael P.
11 May 2021
SVP, Chief Scientific Officer
Sold after exercise
5,000
$20.22
$101.09K
Lackner Mark
10 Feb 2021
SVP, Head of Biology
Sold after exercise
596
$21.00
$12.52K
Lackner Mark
9 Feb 2021
SVP, Head of Biology
Sold after exercise
1,104
$21.05
$23.23K
Dillon Michael P.
9 Feb 2021
SVP, Chief Scientific Officer
Sold after exercise
5,000
$20.74
$103.70K
Lackner Mark
8 Feb 2021
SVP, Head of Biology
Sold after exercise
200
$21.00
$4.20K
Lackner Mark
8 Feb 2021
SVP, Head of Biology
Sold after exercise
100
$21.02
$2.10K
BVF PARTNERS L P/IL
2 Feb 2021
See Explanation of Responses
Sell
4,325
$18.00
$77.85K
BVF PARTNERS L P/IL
2 Feb 2021
See Explanation of Responses
Sell
16,850
$18.00
$303.30K
BVF PARTNERS L P/IL
2 Feb 2021
See Explanation of Responses
Sell
25,234
$18.00
$454.21K
Lackner Mark
26 Jan 2021
SVP, Head of Biology
Sold after exercise
800
$18.79
$15.03K
Lackner Mark
26 Jan 2021
SVP, Head of Biology
Sold after exercise
1,701
$18.30
$31.12K
Hata Yujiro S
22 Dec 2020
President and CEO
Exercised, kept
8,000
$4.31
$34.48K
Dillon Michael P.
18 Dec 2020
SVP, Chief Scientific Officer
Exercised, kept
7,750
$4.31
$33.40K
Throne Jason
4 Dec 2020
SVP, General Counsel
Sell
1,579
$15.55
$24.55K
Throne Jason
4 Dec 2020
SVP, General Counsel
Sell
400
$14.66
$5.86K
5AM Ventures IV, L.P.
11 Nov 2020
10% owner
Sell indirect
115,504
$13.66
$1.58M
5AM Ventures IV, L.P.
11 Nov 2020
10% owner
Sell indirect
27,379
$13.66
$374.00K
5AM Ventures IV, L.P.
11 Nov 2020
10% owner
Sell indirect
657,117
$13.66
$8.98M
BVF PARTNERS L P/IL
30 Jun 2020
10% owner
Buy
81
$13.32
$1.08K
BVF PARTNERS L P/IL
30 Jun 2020
10% owner
Buy
929
$13.32
$12.37K
BVF PARTNERS L P/IL
30 Jun 2020
10% owner
Buy
1,521
$13.32
$20.25K
BVF PARTNERS L P/IL
22 Jun 2020
10% owner
Buy
1,354
$13.93
$18.87K
BVF PARTNERS L P/IL
22 Jun 2020
10% owner
Buy
7,854
$13.93
$109.44K
BVF PARTNERS L P/IL
22 Jun 2020
10% owner
Buy
10,524
$13.93
$146.65K
BVF PARTNERS L P/IL
19 Jun 2020
10% owner
Buy
6,769
$14.39
$97.40K
BVF PARTNERS L P/IL
19 Jun 2020
10% owner
Buy
39,052
$14.39
$561.94K
BVF PARTNERS L P/IL
19 Jun 2020
10% owner
Buy
52,443
$14.39
$754.63K
Lackner Mark
17 Jun 2020
SVP, Head of Biology
Sold after exercise
373
$19.91
$7.43K
Stone Paul A.
17 Jun 2020
Chief Financial Officer
Sold after exercise
600
$19.95
$11.97K
Stone Paul A.
17 Jun 2020
Chief Financial Officer
Sold after exercise
2,500
$17.50
$43.75K
Lackner Mark
16 Jun 2020
SVP, Head of Biology
Sold after exercise
6,750
$14.93
$100.76K
Throne Jason
4 Jun 2020
VP, General Counsel
Sell
2,205
$8.66
$19.09K
Lackner Mark
2 Jun 2020
SVP, Head of Biology
Sell
104
$10.11
$1.05K
Lackner Mark
2 Jun 2020
SVP, Head of Biology
Sell
333
$9.73
$3.24K
Lackner Mark
2 Jun 2020
SVP, Head of Biology
Sell
408
$8.55
$3.49K
Hata Yujiro S
15 Apr 2020
President and CEO
Exercised, kept
47,564
$4.31
$205.00K
Stone Paul A.
30 Mar 2020
Chief Financial Officer
Exercised, kept
5,000
$4.62
$23.10K
Hata Yujiro S
30 Jul 2019
President and CEO
Exercised, kept
15,000
$4.31
$64.65K
Stone Paul A.
26 Jul 2019
SVP, General Counsel
Exercised, kept
10,000
$4.62
$46.20K
Hager Jeffrey
26 Jul 2019
SVP, Chief Technology Officer
Exercised, kept
5,197
$4.31
$22.40K
Hager Jeffrey
10 Jul 2019
SVP, Chief Technology Officer
Exercised, kept
7,145
$4.31
$30.79K
Hager Jeffrey
19 Jun 2019
SVP, Chief Technology Officer
Exercised, kept
8,628
$4.31
$37.19K
CANAAN X L.P.
28 May 2019
10% owner
Buy
400,000
$10.00
$4.00M
SHANNON TIMOTHY M
28 May 2019
Director
Buy indirect
400,000
$10.00
$4.00M
5AM Ventures IV, L.P.
28 May 2019
10% owner
Buy indirect
500,000
$10.00
$5.00M
5AM Ventures IV, L.P.
28 May 2019
10% owner
Buy indirect
10,000
$10.00
$100.00K
5AM Ventures IV, L.P.
28 May 2019
10% owner
Buy indirect
240,000
$10.00
$2.40M
Stone Paul A.
28 May 2019
SVP, General Counsel
Buy indirect
10,000
$10.00
$100.00K
Stone Paul A.
28 May 2019
SVP, General Counsel
Buy indirect
240,000
$10.00
$2.40M
DIEKMAN JOHN D
28 May 2019
Director
Buy indirect
10,000
$10.00
$100.00K
DIEKMAN JOHN D
28 May 2019
Director
Buy indirect
240,000
$10.00
$2.40M
Alexandria Venture Investments, LLC
28 May 2019
10% owner
Buy
50,000
$10.00
$500.00K

What was left out

Form 4 filings counted 166
Amendments (4/A) skipped 0
Filings about a different issuer 0
Unreadable filings 0
Joint filings 6
Sales on a Rule 10b5-1 plan 12
Sales straight out of an exercise 58
Sales at will 14
Transactions with no price 0
Shares from compensation/vesting 12,886,121
Sales filed before the plan box existed 14
History held since 28 May 2019