IDEAYA Biosciences Ownership | Who Owns IDEAYA Biosciences?

Overview Forecast RevenueFinancials Chart

IDEAYA Biosciences Ownership Summary

IDEAYA Biosciences is owned by 115.98% institutional investors, 2.19% insiders. Fmr is the largest institutional shareholder, holding 15.91% of IDYA shares. Fidelity Growth Compy Commingled Pl S is the top mutual fund, with 6.51% of its assets in IDEAYA Biosciences shares.

IDYA Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	IDEAYA Biosciences	115.98%	2.19%	-18.17%
Sector	Healthcare Stocks	244.59%	12.11%	-156.70%
Industry	Biotech Stocks	379.61%	11.70%	-291.31%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Fmr	14.11M	15.91%	$525.86M
Blackrock funding, inc. /de	8.89M	10.03%	$331.45M
Blackrock	6.81M	8.73%	$239.02M
Janus henderson group	7.27M	8.20%	$242.02M
Capital research global investors	5.34M	6.03%	$199.20M
Baker bros. advisors lp	5.01M	5.65%	$186.72M
Vanguard group	5.02M	5.60%	$173.52M
State street	4.55M	5.13%	$169.54M
Vanguard capital management	4.13M	4.66%	$154.02M
Logos global management lp	3.00M	3.38%	$111.81M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Gsk	1.33M	8.25%	$49.69M
Logos global management lp	3.00M	4.81%	$111.81M
Boxer capital	2.20M	4.07%	$77.34M
Dafna capital management	497.24K	3.53%	$18.53M
Sio capital management	480.38K	2.96%	$17.90M
Ally bridge group (ny)	67.50K	2.22%	$2.52M
Sofinnova investments	925.12K	1.78%	$34.48M
Redmile group	640.20K	1.60%	$23.86M
Platinum investment management	138.71K	1.27%	$5.17M
Rhenman & partners asset management ab	343.80K	1.21%	$12.81M

Top Buyers

Holder	Shares	% Assets	Change
Alliancebernstein	1.63M	0.02%	1.53M
Deerfield management company, l.p. (series c)	2.71M	1.06%	1.18M
Baker bros. advisors lp	5.01M	0.94%	1.06M
Fmr	14.11M	0.02%	937.33K
Arrowstreet capital, limited partnership	891.61K	0.01%	891.61K

Top Sellers

Holder	Shares	% Assets	Change
Federated hermes	1.43M	0.08%	-1.56M
Bvf inc/il	-	-	-1.41M
Ra capital management	-	-	-1.35M
Fiera capital	1.45M	0.20%	-1.08M
First turn management	-	-	-873.84K

New Positions

Holder	Shares	% Assets	Change	Value
Arrowstreet capital, limited partnership	891.61K	0.01%	891.61K	$33.23M
Sixth street partners management company	754.89K	0.00%	754.89K	$28.13M
Affinity asset advisors	400.00K	0.67%	400.00K	$14.91M
Rtw investments, lp	370.37K	0.12%	370.37K	$13.80M
Axa investment managers	325.51K	0.02%	325.51K	$8.86M

Sold Out

Holder	Change
Capital performance advisors llp	-1.00
Td private client wealth	-4.00
Skopos labs	-4.00
Vermillion wealth management	-6.00
Geneos wealth management	-15.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Jun 30, 2026	289	8.65%	102,873,551	8.52%	115	1.02%	157	17.16%	90	20.00%
Mar 31, 2026	127	-49.60%	21,391,524	-77.70%	24	0.21%	58	-57.97%	37	-50.00%
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%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Fidelity Growth Compy Commingled Pl S	6.28M	6.51%	330.75K
Fidelity Growth Compy Commingled Pl O	5.35M	6.33%	82.95K
American Funds SMALLCAP World A	5.20M	5.92%	518.52K
Fidelity Growth Company Fund	4.60M	5.24%	364.83K
Vanguard Morn Total Stk Mkt Idx Investor	2.97M	3.38%	280.30K
Vanguard Total Stock Mkt Idx Inv	2.97M	3.38%	280.30K
Vanguard MStar Total Stk Mkt Idx Invest	2.98M	3.09%	13.64K
Vanguard US Total Market Shares ETF	2.49M	2.85%	2.78K
State Street® SPDR® S&P® Biotech ETF	2.27M	2.35%	5.22K
iShares Russell 2000 ETF	2.11M	2.18%	-37.44K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Jul 07, 2026	Ruiz Briseno Andres	Chief Accounting Officer	Sell	$382.13K
Mar 02, 2026	Stein Jeffrey	-	Buy	$1.65M
May 29, 2024	WHITE MICHAEL ANTHONY	Chief Scientific Officer	Sell	$1.00M
May 29, 2024	WHITE MICHAEL ANTHONY	Chief Scientific Officer	Sell	$31.30K
May 14, 2024	Hata Yujiro S	President and CEO	Sell	$2.26M

Insider Transactions Trends

Date	Buy	Sell
2026 Q3	-	1
2026 Q2	-	-
2026 Q1	1	-
2025 Q4	-	-
2025 Q2	-	-

IDYA Ownership FAQ

Who Owns IDEAYA Biosciences?

IDEAYA Biosciences shareholders are primarily institutional investors at 115.98%, followed by 2.19% insiders and -18.17% retail investors. The average institutional ownership in IDEAYA Biosciences's industry, Biotech Stocks , is 379.61%, which IDEAYA Biosciences falls below.

Who owns the most shares of IDEAYA Biosciences?

IDEAYA Biosciences’s largest shareholders are Fmr (14.11M shares, 15.91%), Blackrock funding, inc. /de (8.89M shares, 10.03%), and Blackrock (6.81M shares, 8.73%). Together, they hold 34.67% 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 8.25% of its assets in 1.33M IDEAYA Biosciences shares, valued at 49.69M$.

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 6.51% of its total shares outstanding invested in 6.28M IDEAYA Biosciences shares.

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