$IDYA

$33.50 +$0.62 (1.89%) Close

$IDYA Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 96.5M shares outstanding

Who owns IDYA?

By type of holder

Institutions 100.0% Insiders 0.0% Everyone else 0.0%

Concentration Top 10 holders own 59.9%

FMR LLC 14.6% · BlackRock, Inc. 9.2%

Institutional ownership

100.0%

+1.9 pts vs last qtr

Institutional holders

283

+30 vs last qtr

Net shares bought

+7.4M

by institutions in Q2 2026

New / sold out

67 / 37

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Jupiter Topco LLC NEW +8.6M
Alliancebernstein L.P. +1.5M

Biggest sellers in Q2 2026

Janus Henderson Group PLC SOLD OUT −7.3M
Federated Hermes, Inc. −1.6M

Who is planning to sell?

Notices of proposed sale, last 12 months

$9.19M

2 notices from 2 people

Shares covered

239.9K

0.25% of the company

Arranged in advance

100%

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

Yujiro Hata Ceo 10b5-1 $8.8M
Andres Ruiz Briseno Senior vp 10b5-1 $382K

Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

Diluted share count, FY2020–FY2025

+257.9%

+29.05% a year

Each share's claim on the business

−72.1%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

— vs $123M

over 6 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years52% 3–5 years22% 1–3 years8% Under 1 year17%

Quarterly turnover

20.8%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting IDYA on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
F FMR LLC	14.1M	14.62%	+937.3K (+7.1%)	≤2021	0.0%
Shares held by quarter Peak holding14.1M (Q2'26) Change over 8 quarters+1.5M Share of the company14.620% FMR LLC's full portfolio →
B BlackRock, Inc.	8.9M	9.22%	+451.1K (+5.3%)	≤2021	0.0%
Shares held by quarter Peak holding9.2M (Q1'25) Change over 8 quarters+1.2M Share of the company9.220% BlackRock, Inc.'s full portfolio →

FMR LLC

14.1M

% of company

14.62%

Change vs last qtr

+937.3K (+7.1%)

Held since

≤2021

BlackRock, Inc.

8.9M

% of company

9.22%

Change vs last qtr

+451.1K (+5.3%)

Held since

≤2021

28 more super investors behind a free account

See every manager holding IDEAYA Biosciences, Inc., how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting IDYA on Form N-PORT; together they hold 42.5% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
SW SMALLCAP World Fund Inc SMALLCAP World Fund Inc	$194M	5.2M	5.39%	0.20%	June 30, 2026
FG Fidelity Growth Company Fund Fidelity Mt. Vernon Street Trust	$190M	4.7M	4.90%	0.19%	August 31, 2026

SMALLCAP World Fund Inc

Position value

$194M

% of company

5.39%

% of the fund

0.20%

As of

June 30, 2026

Fidelity Growth Company Fund

Fidelity Mt. Vernon Street Trust

Position value

$190M

% of company

4.90%

% of the fund

0.19%

As of

August 31, 2026

23 more funds behind a free account

See every fund holding IDEAYA Biosciences, Inc. and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
HY Hata Yujiro S Insider	690.7K	0.72%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.720% Hata Yujiro S's insider activity →
SJ Stein Jeffrey Insider	57.6K	0.06%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.060% Stein Jeffrey's insider activity →

Hata Yujiro S

Insider

690.7K

% of company

0.72%

Change vs last qtr

—

Held since

—

Stein Jeffrey

Insider

57.6K

% of company

0.06%

Change vs last qtr

—

Held since

—

2 more holders behind a free account

See every insider and 5%+ holder of IDEAYA Biosciences, Inc..

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