Erasca, Inc. Schedule 13G/A amendment discloses institutional beneficial ownership positions held by advisory clients of Suvretta Capital Management, LLC and related parties. Suvretta reports 3,434,967 shares (1.1%) held with shared voting and dispositive power; Averill Master Fund, Ltd. reports 2,945,497 shares (0.9%).
The filing states all reported securities are directly owned by Suvretta advisory clients and that none of those clients is separately deemed to beneficially own more than 5% of the class. Shared voting and shared dispositive power are asserted for the listed holders; sole voting and sole dispositive power are reported as zero.
Positive
None.
Negative
None.
Insights
Amendment clarifies institutional positions and voting/dispositive arrangements.
The filing lists 3,434,967 shares (1.1%) associated with Suvretta and 2,945,497 shares (0.9%) associated with Averill, each shown as shared voting and dispositive power. It attributes ownership to advisory clients rather than to the manager directly.
Implications depend on client selling or voting decisions; the filing expressly states no advisory client exceeds 5%. Subsequent filings may disclose any changes in these holdings.
Key Figures
Suvretta shares beneficially owned:3,434,967 sharesSuvretta percent of class:1.1%Averill shares beneficially owned:2,945,497 shares+2 more
5 metrics
Suvretta shares beneficially owned3,434,967 sharesAmount beneficially owned reported for Suvretta Capital Management
Suvretta percent of class1.1%Percent of class reported for Suvretta Capital Management
Averill percent of class0.9%Percent of class reported for Averill Master Fund, Ltd.
Sole voting/dispositive power0Sole voting and sole dispositive power reported as zero for listed reporting persons
Key Terms
Schedule 13G/A, beneficially owned, shared dispositive power
3 terms
Schedule 13G/Aregulatory
"Amendment No. 1 and form header identifying the filing type"
A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.
Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.
shared dispositive powerfinancial
"Item 4(c)(iv) Shared power to dispose or to direct the disposition of: 3,434,967"
Suvretta Capital Management reports 3,434,967 shares, representing 1.1% of Erasca's common stock, with shared voting and shared dispositive power as stated in the amendment.
What stake does Averill Master Fund report in ERAS?
Averill Master Fund, Ltd. reports 2,945,497 shares, representing 0.9% of Erasca's common stock, with shared voting and shared dispositive power per the filing.
Who is reported as the beneficial owner of these shares?
The filing states the securities are directly owned by advisory clients of Suvretta Capital Management, LLC, and the reporting persons disclaim beneficial ownership beyond any pecuniary interest.
Does any reporting person own more than 5% of Erasca's class?
No; the amendment states none of the advisory clients reported may be deemed to beneficially own more than 5% of the common stock, and Item 5 is answered accordingly.
What voting and dispositive powers are reported?
Each reporting person shows 0 sole voting and sole dispositive power, and reports shared voting and shared dispositive power of the numbers disclosed (for example, 3,434,967 shared for Suvretta).
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
(Amendment No. 1)
Erasca, Inc.
(Name of Issuer)
Common Stock, $0.0001 par value per share
(Title of Class of Securities)
29479A108
(CUSIP Number)
03/31/2026
(Date of Event Which Requires Filing of this Statement)
Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
Rule 13d-1(b)
Rule 13d-1(c)
Rule 13d-1(d)
schemaVersion:
SCHEDULE 13G
CUSIP Number(s):
29479A108
1
Names of Reporting Persons
Suvretta Capital Management, LLC
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
DELAWARE
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
3,434,967.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
3,434,967.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
3,434,967.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
1.1 %
12
Type of Reporting Person (See Instructions)
IA, OO
SCHEDULE 13G
CUSIP Number(s):
29479A108
1
Names of Reporting Persons
Averill Master Fund, Ltd.
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
CAYMAN ISLANDS
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
2,945,497.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
2,945,497.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
2,945,497.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
0.9 %
12
Type of Reporting Person (See Instructions)
CO
SCHEDULE 13G
CUSIP Number(s):
29479A108
1
Names of Reporting Persons
Aaron Cowen
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
UNITED STATES
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
3,434,967.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
3,434,967.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
3,434,967.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
1.1 %
12
Type of Reporting Person (See Instructions)
HC, IN
SCHEDULE 13G
Item 1.
(a)
Name of issuer:
Erasca, Inc.
(b)
Address of issuer's principal executive offices:
3115 Merryfield Row, Suite 300, San Diego, CA 92121
Item 2.
(a)
Name of person filing:
Suvretta Capital Management, LLC
Averill Master Fund, Ltd.
Aaron Cowen
(b)
Address or principal business office or, if none, residence:
Suvretta Capital Management, LLC
540 Madison Avenue, 7th Floor
New York, New York 10022
United States of America
Averill Master Fund, Ltd.
c/o Maples Corporate Services Limited
P.O. Box 309
Ugland House
Grand Cayman KY1-1104
Cayman Islands
Aaron Cowen
c/o Suvretta Capital Management, LLC
540 Madison Avenue, 7th Floor
New York, New York 10022
(c)
Citizenship:
Suvretta Capital Management, LLC - Delaware
Averill Master Fund, Ltd. - Cayman Islands
Aaron Cowen - United States
(d)
Title of class of securities:
Common Stock, $0.0001 par value per share
(e)
CUSIP No.:
29479A108
Item 3.
If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)
Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)
Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)
Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)
Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)
An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)
An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)
A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)
A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)
A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)
A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J),
please specify the type of institution:
(k)
Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Ownership of more than 5 Percent on Behalf of Another Person.
If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required.
All of the securities reported in this Schedule 13G Amendment No. 1 are directly owned by advisory clients of Suvretta Capital Management, LLC. None of those advisory clients may be deemed to beneficially own more than 5% of the Common Stock, $0.0001 par value per share.
Item 7.
Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary.
Please see Exhibit B attached hereto.
Item 8.
Identification and Classification of Members of the Group.
Not Applicable
Item 9.
Notice of Dissolution of Group.
Not Applicable
Item 10.
Certifications:
By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.
SIGNATURE
After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.
Suvretta Capital Management, LLC
Signature:
/s/ Andrew Nathanson
Name/Title:
Andrew Nathanson, General Counsel and Chief Compliance Officer
Date:
05/12/2026
Averill Master Fund, Ltd.
Signature:
/s/ Andrew Nathanson
Name/Title:
Andrew Nathanson, Authorized Signatory
Date:
05/12/2026
Aaron Cowen
Signature:
/s/ Aaron Cowen
Name/Title:
Aaron Cowen
Date:
05/12/2026
Comments accompanying signature: * Each Reporting Person disclaims beneficial ownership of the reported securities except to the extent of his, her or its pecuniary interest therein, and this report shall not be deemed an admission that such Reporting Person is the beneficial owner of the securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose.
To the extent that "ownership of 5 percent or less of a class" was indicated in Item 5, such response only applies to the Reporting Person(s) that indicated elsewhere herein that it beneficially owns five percent (5%) or less of the class.
Exhibit Information
Exhibit A - Joint Filing Agreement
Exhibit B - Control Person Identification
