Erasca Ownership | Who Owns Erasca?

Erasca Ownership Summary

Erasca is owned by 8.76% institutional investors, 10.70% insiders, and 80.54% retail investors. Frazier life sciences management is the largest institutional shareholder, holding 8.70% of ERAS shares. Vanguard Total Stock Mkt Idx Inv is the top mutual fund, with 2.67% of its assets in Erasca shares.

ERAS Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Erasca	8.76%	10.70%	80.54%
Sector	Healthcare Stocks	232.80%	10.63%	-143.43%
Industry	Biotech Stocks	379.48%	10.37%	-289.85%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Frazier life sciences management	24.68M	8.70%	$399.24M
T. rowe price investment management	21.26M	7.50%	$343.98M
Blackrock funding, inc. /de	20.15M	7.11%	$326.05M
Blackrock	10.61M	7.02%	$25.04M
Vr adviser	16.38M	5.78%	$265.07M
Rtw investments, lp	16.16M	5.70%	$261.42M
Vanguard group	12.81M	4.52%	$47.66M
Artal group	9.63M	4.42%	$22.73M
Vivo capital	12.15M	4.29%	$196.61M
Siren	11.24M	3.97%	$181.93M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Arch venture management	7.09M	16.95%	$114.74M
Vivo capital	12.15M	16.41%	$196.61M
5am venture management	3.49M	15.66%	$56.40M
Frazier life sciences management	24.68M	10.27%	$399.24M
Vr adviser	16.38M	9.89%	$265.07M
Logos global management lp	11.15M	9.01%	$180.41M
Siren	11.24M	5.04%	$181.93M
Cormorant asset management, lp	5.80M	4.71%	$93.84M
Affinity asset advisors	5.35M	4.47%	$86.56M
Acuta capital partners	354.57K	4.05%	$5.74M

Top Buyers

Holder	Shares	% Assets	Change
Rtw investments, lp	16.16M	2.60%	16.01M
Cormorant asset management, lp	5.80M	4.71%	5.80M
T. rowe price investment management	21.26M	0.24%	5.15M
Balyasny asset management	5.14M	0.11%	5.05M
Artal group	9.63M	0.58%	4.91M

Top Sellers

Holder	Shares	% Assets	Change
Suvretta capital management	3.43M	1.42%	-11.07M
Armistice capital	-	-	-6.17M
Arch venture management	7.09M	16.95%	-3.96M
Paradigm biocapital advisors lp	10.39M	3.44%	-3.77M
Soleus capital management	-	-	-2.16M

New Positions

Holder	Shares	% Assets	Change	Value
Cormorant asset management, lp	5.80M	4.71%	5.80M	$93.84M
Janus henderson group	3.71M	0.03%	3.71M	$59.99M
Commodore capital lp	3.17M	2.97%	3.17M	$51.37M
Adage capital partners gp	2.10M	0.05%	2.10M	$33.98M
Vanguard fiduciary trust	1.54M	0.01%	1.54M	$24.88M

Sold Out

Holder	Change
Clearstead advisors	-2.00
Nelson, van denburg & campbell wealth management group	-18.00
Amundi	-80.00
Corecap advisors	-100.00
Smartleaf asset management	-108.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Dec 31, 2025	49	-66.21%	24,840,571	-88.44%	8	0.15%	24	-60.66%	12	-70.73%
Sep 30, 2025	44	-67.88%	17,749,176	-91.74%	6	0.11%	18	-78.05%	15	-55.88%
Jun 30, 2025	142	-5.96%	218,120,987	5.95%	76	145.73%	85	13.33%	36	-20.00%
Mar 31, 2025	153	4.08%	224,275,876	-2.85%	7	0.12%	76	-3.80%	45	18.42%
Dec 31, 2024	145	8.21%	211,469,201	-8.86%	74	1.11%	78	-	38	31.03%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Vanguard Total Stock Mkt Idx Inv	8.31M	2.67%	100.10K
State Street® SPDR® S&P® Biotech ETF	5.28M	1.70%	-52.20K
iShares Russell 2000 ETF	4.48M	1.44%	37.74K
T. Rowe Price U.S. SC Value Eq Tr-Z	2.91M	1.03%	147.12K
Vanguard Institutional Extnd Mkt Idx Tr	2.67M	0.86%	96.37K
T. Rowe Price US Small-Cap Core Equity	2.55M	0.82%	-477.53K
T. Rowe Price Small-Cap Stock	2.55M	0.82%	-1.68M
SPDR® S&P Biotech ETF	2.23M	0.79%	-13.57K
T. Rowe Price U.S. SC Core Eq Tr-Z	1.82M	0.64%	27.83K
T. Rowe Price Small-Cap Value	1.80M	0.58%	-2.48M

Recent Insider Transactions

Date	Name	Role	Activity	Value
Apr 01, 2026	Garner Ebun	Chief Legal Officer	Sell	$1.31M
Mar 04, 2026	Morris Shannon	Chief Medical Officer	Sell	$300.76K
Jan 07, 2026	Garner Ebun	General Counsel & Corp. Sec.	Sell	$670.81K
May 21, 2024	Casdin Alexander W.	-	Buy	$181.92K
Dec 06, 2023	Start Valerie Denise Harding	-	Buy	$18.48K

Insider Transactions Trends

Date	Buy	Sell
2026 Q2	-	1
2026 Q1	-	2
2025 Q4	-	-
2025 Q2	-	-
2025 Q1	-	-

ERAS Ownership FAQ

Who Owns Erasca?

Erasca shareholders are primarily institutional investors at 8.76%, followed by 10.70% insiders and 80.54% retail investors. The average institutional ownership in Erasca's industry, Biotech Stocks , is 379.48%, which Erasca falls below.

Who owns the most shares of Erasca?

Erasca’s largest shareholders are Frazier life sciences management (24.68M shares, 8.70%), T. rowe price investment management (21.26M shares, 7.50%), and Blackrock funding, inc. /de (20.15M shares, 7.11%). Together, they hold 23.31% of Erasca’s total shares outstanding.

Does Blackrock own Erasca?

Yes, BlackRock owns 7.02% of Erasca, totaling 10.61M shares as of Jun 2024. This represents 0.00% of BlackRock's total assets, with a market value of 25.04M$. In the last quarter, BlackRock increased its holdings by 3.63M shares, a 52.00% change.

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

Arch venture management is Erasca’s biggest shareholder by percentage of total assets invested, with 16.95% of its assets in 7.09M Erasca shares, valued at 114.74M$.

Who is the top mutual fund holder of Erasca shares?

Vanguard Total Stock Mkt Idx Inv is the top mutual fund holder of Erasca shares, with 2.67% of its total shares outstanding invested in 8.31M Erasca shares.

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