1. Corporate Officers - S
2. Stein Jeffrey

Insider Trading History of Stein Jeffrey

The following table details the insider trading activities (stock purchases, stock sales, and stock option exercises) of Stein Jeffrey since 2015. This trader's CIK number is 1478831. At the time of last reporting, Stein Jeffrey was the Officer of Ideaya Biosciences, Inc.. (stock ticker symbol IDYA). Also see all insider trading activities at Ideaya Biosciences, Inc..

Note that in the past Stein Jeffrey also reported insider trading activities as an insider of the following companies:

Yearly summary of insider trading at Paratek Pharmaceuticals, Inc. (PRTK) by Stein Jeffrey

		Insider Buying		Insider Sales		Option Exercises
Year	Symbol	Shares	Value	Shares	Value	Shares	Value
2023	PRTK	0	$0	7,000	$13,300	0	$0
2019	PRTK	0	$0	3,375	$24,097	0	$0

Yearly summary of insider trading at Cidara Therapeutics, Inc. (CDTX) by Stein Jeffrey

		Insider Buying		Insider Sales		Option Exercises
Year	Symbol	Shares	Value	Shares	Value	Shares	Value
2024	CDTX	8,000	$105,680	0	$0	0	$0
2023	CDTX	100,000	$99,749	0	$0	0	$0
2021	CDTX	0	$0	0	$0	20,000	$0
2021	CDTX	100,000	$166,300	0	$0	0	$0
2020	CDTX	50,000	$100,000	0	$0	0	$0
2019	CDTX	52,500	$100,117	0	$0	0	$0
2018	CDTX	212,766	$1,000,000	0	$0	0	$0
2017	CDTX	4,262	$339,039	0	$0	0	$0
2017	CDTX	35,250	$239,086	0	$0	0	$0
2016	CDTX	4,310	$49,608	0	$0	0	$0
2015	CDTX	7,120	$107,838	0	$0	0	$0

Yearly summary of insider trading at Ideaya Biosciences, Inc. (IDYA) by Stein Jeffrey

		Insider Buying		Insider Sales		Option Exercises
Year	Symbol	Shares	Value	Shares	Value	Shares	Value
2026	IDYA	50,000	$1,647,900	0	$0	0	$0

Insider trading activities at 3 companies by Stein Jeffrey:

1. Paratek Pharmaceuticals, Inc. (PRTK)

2. Cidara Therapeutics, Inc. (CDTX)

3. Ideaya Biosciences, Inc. (IDYA)

Table 1. Insider trading of Paratek Pharmaceuticals, Inc. (PRTK) by Stein Jeffrey

Trade Date	Symbol	Trade Type	Shares	Price ($)	Value ($)
2023-02-21	PRTK	Sale	7,000	1.90	13,300
2019-02-15	PRTK	Sale	3,375	7.14	24,097

Table 2. Insider trading of Cidara Therapeutics, Inc. (CDTX) by Stein Jeffrey

Trade Date	Symbol	Trade Type	Shares	Price ($)	Value ($)
2017-09-12	CDTX	Buy	367	135.80	49,838
2017-06-05	CDTX	Buy	750	118.95	89,211
2017-03-31	CDTX	Buy	645	155.00	99,975
2020-11-10	CDTX	Buy	2,500	40.01	100,015
2024-06-07	CDTX	Buy	8,000	13.21	105,680
2023-08-08	CDTX	Buy	50,000	.96	47,900
2023-03-27	CDTX	Buy	50,000	1.04	51,849
2021-12-29	CDTX	Option Ex	20,000	.00	0
2021-11-12	CDTX	Buy	50,000	1.59	79,550
2021-08-19	CDTX	Buy	10,000	1.79	17,870
2021-08-18	CDTX	Buy	40,000	1.72	68,880
2020-11-10	CDTX	Buy	50,000	2.00	100,000
2019-09-24	CDTX	Buy	52,500	1.91	100,117
2018-05-23	CDTX	Buy	212,766	4.70	1,000,000
2017-09-12	CDTX	Buy	7,350	6.79	49,906
2017-06-05	CDTX	Buy	15,000	5.95	89,205
2017-03-31	CDTX	Buy	12,900	7.75	99,975
2016-05-20	CDTX	Buy	4,310	11.51	49,608
2015-11-24	CDTX	Buy	5,400	14.97	80,838
2015-11-25	CDTX	Buy	1,300	15.60	20,280
2015-04-20	CDTX	Buy	420	16.00	6,720

Table 3. Insider trading of Ideaya Biosciences, Inc. (IDYA) by Stein Jeffrey

Trade Date	Symbol	Trade Type	Shares	Price ($)	Value ($)
2026-03-02	IDYA	Buy	50,000	32.96	1,647,900

Insider trading activities including stock purchases, stock sales, and option exercises listed in the above table cannot be completely guaranteed as to their accuracy. For more information regarding the trades made by Stein Jeffrey (Officer of Ideaya Biosciences, Inc. at the time of this reporting) see the Securities and Exchange Commission (SEC) website.

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