IDEAYA Biosciences Ownership | Who Owns IDEAYA Biosciences?

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IDEAYA Biosciences Ownership Summary

IDEAYA Biosciences is owned by 58.15% institutional investors, 0.90% insiders, and 40.95% retail investors. Fmr is the largest institutional shareholder, holding 14.86% of IDYA shares. Fidelity Growth Compy Commingled Pl S is the top mutual fund, with 6.73% of its assets in IDEAYA Biosciences shares.

IDYA Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	IDEAYA Biosciences	58.15%	0.90%	40.95%
Sector	Healthcare Stocks	232.20%	10.74%	-142.94%
Industry	Biotech Stocks	382.11%	10.55%	-292.66%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Fmr	13.15M	14.86%	$357.72M
Blackrock funding, inc. /de	8.21M	9.16%	$283.80M
Blackrock	6.81M	8.73%	$239.02M
Janus henderson group	5.86M	6.80%	$150.61M
Capital research global investors	5.28M	5.89%	$182.52M
Vanguard group	5.02M	5.60%	$173.52M
Point72 asset management	3.82M	4.31%	$103.83M
Federated hermes	3.40M	3.79%	$117.39M
Baker bros. advisors lp	3.28M	3.70%	$89.12M
State street	3.24M	3.66%	$88.19M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Gsk	1.33M	5.77%	$46.09M
Logos global management lp	2.25M	5.49%	$61.22M
Boxer capital	2.20M	4.07%	$77.34M
Dafna capital management	539.92K	3.63%	$14.69M
Stempoint capital lp	371.82K	2.03%	$10.12M
Redmile group	742.02K	1.96%	$20.19M
Sofinnova investments	922.70K	1.37%	$25.11M
Healthinvest partners ab	97.44K	1.07%	$3.37M
Iron triangle partners lp	270.00K	1.04%	$7.35M
Fifth lane capital, lp	34.24K	0.94%	$931.59K

Top Buyers

Holder	Shares	% Assets	Change
Adage capital partners gp	2.90M	0.13%	1.66M
Gsk	1.33M	5.77%	1.33M
Baker bros. advisors lp	3.28M	0.64%	1.16M
Blackrock	6.81M	0.01%	842.38K
Janus henderson group	5.86M	0.08%	695.26K

Top Sellers

Holder	Shares	% Assets	Change
Deerfield management company, l.p. (series c)	2.15M	0.89%	-1.76M
Bvf inc/il	-	-	-1.41M
Ra capital management	-	-	-1.35M
Capital research global investors	5.28M	0.03%	-1.27M
Federated hermes	3.40M	0.20%	-1.23M

New Positions

Holder	Shares	% Assets	Change	Value
Gsk	1.33M	5.77%	1.33M	$46.09M
Tang capital management	400.00K	0.42%	400.00K	$10.88M
Axa investment managers	325.51K	0.02%	325.51K	$8.86M
Iron triangle partners lp	270.00K	1.04%	270.00K	$7.35M
Susquehanna portfolio strategies	163.26K	0.07%	163.26K	$4.44M

Sold Out

Holder	Change
Capital performance advisors llp	-1.00
Skopos labs	-4.00
Jpl wealth management	-10.00
Geneos wealth management	-15.00
Cibc private wealth group	-16.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Dec 31, 2025	179	-21.15%	52,131,217	-44.59%	58	0.51%	101	-20.47%	49	-27.94%
Sep 30, 2025	218	5.83%	92,968,998	-3.97%	105	0.88%	123	16.04%	67	-11.84%
Jun 30, 2025	205	-0.97%	96,799,776	3.14%	109	0.97%	105	-20.45%	76	61.70%
Mar 31, 2025	13	-93.69%	10,891,961	-88.15%	12	0.11%	8	-93.65%	2	-96.36%
Dec 31, 2024	104	-51.17%	47,415,335	-48.39%	55	0.48%	63	-55.63%	28	-36.36%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Fidelity Growth Compy Commingled Pl S	5.91M	6.73%	27.31K
Fidelity Growth Compy Commingled Pl O	5.35M	6.33%	82.95K
American Funds SMALLCAP World A	4.79M	5.46%	-1.08M
Fidelity Growth Company Fund	4.16M	4.73%	-23.43K
Vanguard Total Stock Mkt Idx Inv	2.64M	3.01%	9.78K
Vanguard US Total Market Shares ETF	2.49M	2.85%	2.78K
State Street® SPDR® S&P® Biotech ETF	2.18M	2.48%	-11.66K
Federated Hermes Kaufmann Growth	2.01M	2.29%	-687.50K
Federated Hermes Kaufmann R	2.01M	2.29%	-687.50K
iShares Russell 2000 ETF	1.93M	2.19%	1.18M

Recent Insider Transactions

Date	Name	Role	Activity	Value
May 29, 2024	WHITE MICHAEL ANTHONY	Chief Scientific Officer	Sell	$31.30K
May 29, 2024	WHITE MICHAEL ANTHONY	Chief Scientific Officer	Sell	$1.00M
May 16, 2024	Hata Yujiro S	President and CEO	Sell	$1.26M
May 14, 2024	Hata Yujiro S	President and CEO	Sell	$2.26M
May 15, 2024	Hata Yujiro S	President and CEO	Sell	$2.28M

Insider Transactions Trends

Date	Buy	Sell
2025 Q2	-	-
2025 Q1	-	-
2024 Q4	-	-
2024 Q3	-	-
2024 Q2	-	9

IDYA Ownership FAQ

Who Owns IDEAYA Biosciences?

IDEAYA Biosciences shareholders are primarily institutional investors at 58.15%, followed by 0.90% insiders and 40.95% retail investors. The average institutional ownership in IDEAYA Biosciences's industry, Biotech Stocks , is 382.11%, which IDEAYA Biosciences falls below.

Who owns the most shares of IDEAYA Biosciences?

IDEAYA Biosciences’s largest shareholders are Fmr (13.15M shares, 14.86%), Blackrock funding, inc. /de (8.21M shares, 9.16%), and Blackrock (6.81M shares, 8.73%). Together, they hold 32.75% of IDEAYA Biosciences’s total shares outstanding.

Does Blackrock own IDEAYA Biosciences?

Yes, BlackRock owns 8.73% of IDEAYA Biosciences, totaling 6.81M shares as of Jun 2024. This represents 0.01% of BlackRock's total assets, with a market value of 239.02M$. In the last quarter, BlackRock increased its holdings by 842.38K shares, a 14.12% change.

Who is IDEAYA Biosciences’s biggest shareholder by percentage of total assets invested?

Gsk is IDEAYA Biosciences’s biggest shareholder by percentage of total assets invested, with 5.77% of its assets in 1.33M IDEAYA Biosciences shares, valued at 46.09M$.

Who is the top mutual fund holder of IDEAYA Biosciences shares?

Fidelity Growth Compy Commingled Pl S is the top mutual fund holder of IDEAYA Biosciences shares, with 6.73% of its total shares outstanding invested in 5.91M IDEAYA Biosciences shares.

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