Hata Yujiro S

Director at Xencor Inc · on record since Aug 3, 2015
Director at IDEAYA Biosciences, Inc. · on record since May 22, 2019
President and CEO at IDEAYA Biosciences, Inc. · on record since May 22, 2019
Director at ENANTA PHARMACEUTICALS INC · on record since Aug 23, 2021

Insider trading activity of Hata Yujiro S

Transactions on record: 64; since Aug 3, 2015

Open-market buys: 0

Open-market sells: 14; $17.6M

Companies traded: 3; last filing Mar 13, 2026

Figures computed from official regulatory filings — .

Companies where Hata Yujiro S has traded

ENANTA PHARMACEUTICALS INC6 tx · Mar 13, 2026
IDEAYA Biosciences, Inc.49 tx · $20M · Feb 2, 2026
Xencor Inc9 tx · Jun 27, 2022

Track record of Hata Yujiro S

Insufficient history for a statistical track record (fewer than 5 open-market buys).

Transaction history of Hata Yujiro S

Co-insiders of Hata Yujiro S

CARTER BRUCE L AENANTA PHARMACEUTICALS INC +1
5AM Co-Investors IV, L.P.IDEAYA Biosciences, Inc.
5AM Opportunities I (GP), LLCIDEAYA Biosciences, Inc.
5AM Opportunities I, L.P.IDEAYA Biosciences, Inc.
5AM Partners IV, LLCIDEAYA Biosciences, Inc.
5AM Ventures IV, L.P.IDEAYA Biosciences, Inc.
Adda NathalieENANTA PHARMACEUTICALS INC
AFTING ERNST-GUNTERENANTA PHARMACEUTICALS INC
Alexandria Venture Investments, LLCIDEAYA Biosciences, Inc.
Baltera Robert Jr.Xencor Inc
Baracchini Edgardo JrXencor Inc
Beaupre DarrinIDEAYA Biosciences, Inc.
BIOTECHNOLOGY VALUE FUND II LPIDEAYA Biosciences, Inc.
BIOTECHNOLOGY VALUE FUND L PIDEAYA Biosciences, Inc.
Biotechnology Value Trading Fund OS LPIDEAYA Biosciences, Inc.
Birner HubertENANTA PHARMACEUTICALS INC

This page republishes public regulatory disclosures.

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
ENANTA PHARMACEUTICALS INCListing on record	Mar 13, 2026	AwardD (derivative)	20,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
IDEAYA Biosciences, Inc.Listing on record	Feb 2, 2026	AwardD (derivative)	600,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
ENANTA PHARMACEUTICALS INCListing on record	Mar 14, 2025	AwardD (derivative)	15,700	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
IDEAYA Biosciences, Inc.Listing on record	Feb 28, 2025	AwardD (derivative)	600,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
IDEAYA Biosciences, Inc.Listing on record	Feb 19, 2025	ExerciseD (derivative)	-12,808	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
IDEAYA Biosciences, Inc.Listing on record	Feb 19, 2025	Exercise	12,808	19.52 USD	$250K		SEC
IDEAYA Biosciences, Inc.Listing on record	May 16, 2024	Exercise	56,711	4.31 USD	$244.4K		SEC
IDEAYA Biosciences, Inc.Listing on record	May 16, 2024	Sell	-54,408	41.60 USD	$2.3M		SEC
IDEAYA Biosciences, Inc.Listing on record	May 16, 2024	Exercise	83,856	4.31 USD	$361.4K	Unusual size	SEC
IDEAYA Biosciences, Inc.Listing on record	May 16, 2024	ExerciseD (derivative)	-34,433	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
IDEAYA Biosciences, Inc.Listing on record	May 16, 2024	Sell	-4,349	42.37 USD	$184.3K		SEC
IDEAYA Biosciences, Inc.Listing on record	May 16, 2024	Sell	-29,761	43.48 USD	$1.3M		SEC
IDEAYA Biosciences, Inc.Listing on record	May 16, 2024	ExerciseD (derivative)	-56,711	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
IDEAYA Biosciences, Inc.Listing on record	May 16, 2024	Sell	-53,592	42.57 USD	$2.3M		SEC
IDEAYA Biosciences, Inc.Listing on record	May 16, 2024	ExerciseD (derivative)	-83,856	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
IDEAYA Biosciences, Inc.Listing on record	May 16, 2024	Sell	-2,303	41.84 USD	$96.4K		SEC
IDEAYA Biosciences, Inc.Listing on record	May 16, 2024	Sell	-30,084	41.73 USD	$1.3M		SEC
IDEAYA Biosciences, Inc.Listing on record	May 16, 2024	Exercise	34,433	4.31 USD	$148.4K		SEC
IDEAYA Biosciences, Inc.Listing on record	May 16, 2024	Sell	-503	44.12 USD	$22.2K		SEC
ENANTA PHARMACEUTICALS INCListing on record	Mar 8, 2024	AwardD (derivative)	15,700	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
IDEAYA Biosciences, Inc.Listing on record	Mar 4, 2024	AwardD (derivative)	480,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
IDEAYA Biosciences, Inc.Listing on record	Feb 12, 2024	ExerciseD (derivative)	-75,815	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
IDEAYA Biosciences, Inc.Listing on record	Feb 12, 2024	Sell	-23,557	45.54 USD	$1.1M		SEC
IDEAYA Biosciences, Inc.Listing on record	Feb 12, 2024	Exercise	23,557	4.31 USD	$101.5K		SEC
IDEAYA Biosciences, Inc.Listing on record	Feb 12, 2024	Sell	-75,815	45.15 USD	$3.4M		SEC

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
ENANTA PHARMACEUTICALS INCListing on record	Mar 13, 2026	AwardD (derivative)	20,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
IDEAYA Biosciences, Inc.Listing on record	Feb 2, 2026	AwardD (derivative)	600,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
ENANTA PHARMACEUTICALS INCListing on record	Mar 14, 2025	AwardD (derivative)	15,700	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
IDEAYA Biosciences, Inc.Listing on record	Feb 28, 2025	AwardD (derivative)	600,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
IDEAYA Biosciences, Inc.Listing on record	Feb 19, 2025	ExerciseD (derivative)	-12,808	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
IDEAYA Biosciences, Inc.Listing on record	Feb 19, 2025	Exercise	12,808	19.52 USD	$250K		SEC
IDEAYA Biosciences, Inc.Listing on record	May 16, 2024	Exercise	56,711	4.31 USD	$244.4K		SEC
IDEAYA Biosciences, Inc.Listing on record	May 16, 2024	Sell	-54,408	41.60 USD	$2.3M		SEC
IDEAYA Biosciences, Inc.Listing on record	May 16, 2024	Exercise	83,856	4.31 USD	$361.4K	Unusual size	SEC
IDEAYA Biosciences, Inc.Listing on record	May 16, 2024	ExerciseD (derivative)	-34,433	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
IDEAYA Biosciences, Inc.Listing on record	May 16, 2024	Sell	-4,349	42.37 USD	$184.3K		SEC
IDEAYA Biosciences, Inc.Listing on record	May 16, 2024	Sell	-29,761	43.48 USD	$1.3M		SEC
IDEAYA Biosciences, Inc.Listing on record	May 16, 2024	ExerciseD (derivative)	-56,711	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
IDEAYA Biosciences, Inc.Listing on record	May 16, 2024	Sell	-53,592	42.57 USD	$2.3M		SEC
IDEAYA Biosciences, Inc.Listing on record	May 16, 2024	ExerciseD (derivative)	-83,856	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
IDEAYA Biosciences, Inc.Listing on record	May 16, 2024	Sell	-2,303	41.84 USD	$96.4K		SEC
IDEAYA Biosciences, Inc.Listing on record	May 16, 2024	Sell	-30,084	41.73 USD	$1.3M		SEC
IDEAYA Biosciences, Inc.Listing on record	May 16, 2024	Exercise	34,433	4.31 USD	$148.4K		SEC
IDEAYA Biosciences, Inc.Listing on record	May 16, 2024	Sell	-503	44.12 USD	$22.2K		SEC
ENANTA PHARMACEUTICALS INCListing on record	Mar 8, 2024	AwardD (derivative)	15,700	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
IDEAYA Biosciences, Inc.Listing on record	Mar 4, 2024	AwardD (derivative)	480,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
IDEAYA Biosciences, Inc.Listing on record	Feb 12, 2024	ExerciseD (derivative)	-75,815	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
IDEAYA Biosciences, Inc.Listing on record	Feb 12, 2024	Sell	-23,557	45.54 USD	$1.1M		SEC
IDEAYA Biosciences, Inc.Listing on record	Feb 12, 2024	Exercise	23,557	4.31 USD	$101.5K		SEC
IDEAYA Biosciences, Inc.Listing on record	Feb 12, 2024	Sell	-75,815	45.15 USD	$3.4M		SEC