Erasca (ERAS) awards 1.3M stock options at $18.12 to new R&D chief

Rhea-AI Filing Summary

Erasca, Inc. reported that President, R&D Charles S. Fuchs received a grant of stock options covering 1,300,000 shares of common stock with an exercise price of $18.12 per share. The award was granted in connection with his commencement of employment and vests 25% after one year, with the remaining 75% vesting in 36 monthly installments, subject to continued service. Following this grant, he holds options for 1,300,000 shares.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Fuchs Charles S.

Role President, R&D

Type	Security	Shares	Price	Value
Grant/Award	Stock option (right to buy) F1, F2	1,300,000	$0.00	$0.00

Holdings After Transaction: Stock option (right to buy) — 1,300,000 shares (Direct)

Footnotes (2)

1. F1. The reported option award was granted in connection with the Reporting Person's commencement of employment. Of the total option award, 21,480 shares were granted under the Issuer's 2021 Incentive Award Plan, with a portion intended to qualify as an incentive stock option under Section 422 of the Internal Revenue Code to the extent permitted by law. The remaining 1,278,520 shares were granted as a nonqualified stock option under the Issuer's 2026 Employment Inducement Incentive Award Plan.
2. F2. The reported option award vests as follows: 25% of the shares subject to the option will vest on the first anniversary of the date of grant, and the remaining 75% of the shares will vest in 36 substantially equal monthly installments thereafter, subject to the Reporting Person's continued service with the Issuer through each applicable vesting date.

Key Figures

Options granted: 1,300,000 shares Exercise price: $18.12 per share ISO plan portion: 21,480 shares +4 more

7 metrics

Options granted 1,300,000 shares Stock option award to President, R&D Charles S. Fuchs in connection with commencement of employment

Exercise price $18.12 per share Conversion or exercise price for the 1,300,000-share stock option grant

ISO plan portion 21,480 shares Portion of option award granted under 2021 Incentive Award Plan, partly intended as incentive stock option

Nonqualified option portion 1,278,520 shares Portion granted under 2026 Employment Inducement Incentive Award Plan as nonqualified stock option

Initial vesting cliff 25% Shares vesting on the first anniversary of the grant date, subject to continued service

Remaining vesting period 36 months Remaining 75% of shares vesting in 36 substantially equal monthly installments

Option expiration August 9, 2036 Expiration date of the stock option award if not earlier terminated

Key Terms

incentive stock option, nonqualified stock option, Section 422 of the Internal Revenue Code, 2026 Employment Inducement Incentive Award Plan, +1 more

5 terms

incentive stock option financial

"with a portion intended to qualify as an incentive stock option under Section 422"

An incentive stock option is a type of employee benefit that gives a worker the right to buy company shares at a fixed price, with special tax advantages if the employee holds the shares for a required period. Think of it as a coupon to buy future shares at today’s price that can result in lower tax on the gain. Investors care because ISOs can dilute share count, align staff incentives with the stock price, and affect company compensation costs and the timing of potential share sales.

nonqualified stock option financial

"The remaining 1,278,520 shares were granted as a nonqualified stock option"

A nonqualified stock option (NQSO) is a company grant that gives an individual the right to buy shares at a set price but does not meet special tax rules for incentive stock options; when exercised the difference between the market price and the exercise price is treated as ordinary income for the recipient and as a tax-deductible expense for the company. It matters to investors because NQSOs affect an employee’s after-tax proceeds, the company’s reported expenses, and potential share dilution—think of it like a cash bonus that converts into stock but is taxed as regular pay when you take it.

Section 422 of the Internal Revenue Code regulatory

"intended to qualify as an incentive stock option under Section 422 of the Internal Revenue Code"

2026 Employment Inducement Incentive Award Plan financial

"under the Issuer's 2026 Employment Inducement Incentive Award Plan"

2021 Incentive Award Plan financial

"granted under the Issuer's 2021 Incentive Award Plan"

FAQ

What stock option grant did Erasca (ERAS) report for Charles S. Fuchs?

Erasca reported a stock option grant for 1,300,000 shares of common stock to President, R&D Charles S. Fuchs, with an exercise price of $18.12 per share, in connection with his commencement of employment.

How do the 1,300,000 Erasca (ERAS) options granted to Charles S. Fuchs vest?

The option award vests with 25% of the shares vesting on the first anniversary of the grant date. The remaining 75% vests in 36 substantially equal monthly installments, subject to Fuchs’ continued service with Erasca.

Under which plans were the new Erasca (ERAS) options for Charles S. Fuchs issued?

Of the 1,300,000-share option award, 21,480 shares were granted under the 2021 Incentive Award Plan, and 1,278,520 shares were granted as a nonqualified stock option under the 2026 Employment Inducement Incentive Award Plan.

What is the exercise price and term of Charles S. Fuchs’ Erasca (ERAS) stock options?

The stock options have an exercise price of $18.12 per share, become exercisable starting one year after grant as they vest, and have an expiration date of August 9, 2036, if not earlier terminated under plan terms.

How many Erasca (ERAS) options does Charles S. Fuchs hold after this grant?

After the reported transaction, Charles S. Fuchs holds 1,300,000 stock options for Erasca common shares, all from this single employment-related grant reported in the Form 4.

What portion of Charles S. Fuchs’ Erasca (ERAS) option grant may qualify as an incentive stock option?

Within the 21,480-share portion granted under the 2021 Incentive Award Plan, Erasca states that a portion is intended to qualify as an incentive stock option under Section 422 of the Internal Revenue Code, to the extent permitted by law.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 08/12/2026 - 04:22 PM Accepted by SEC EDGAR 08/12/2026 - 04:22 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Fuchs Charles S.

(Last) (First) (Middle)

C/O ERASCA, INC.

3115 MERRYFIELD ROW, SUITE 300

(Street)

SAN DIEGO CALIFORNIA 92121

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Erasca, Inc. [ ERAS ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President, R&D

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/10/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock option (right to buy)	$18.12	08/10/2026		A		1,300,000(1)		08/10/2027(2)	08/09/2036	Common Stock	1,300,000	$0	1,300,000	D

Explanation of Responses:

1. The reported option award was granted in connection with the Reporting Person's commencement of employment. Of the total option award, 21,480 shares were granted under the Issuer's 2021 Incentive Award Plan, with a portion intended to qualify as an incentive stock option under Section 422 of the Internal Revenue Code to the extent permitted by law. The remaining 1,278,520 shares were granted as a nonqualified stock option under the Issuer's 2026 Employment Inducement Incentive Award Plan.

2. The reported option award vests as follows: 25% of the shares subject to the option will vest on the first anniversary of the date of grant, and the remaining 75% of the shares will vest in 36 substantially equal monthly installments thereafter, subject to the Reporting Person's continued service with the Issuer through each applicable vesting date.

	/s/ Ebun S. Garner, as Attorney-in-Fact	08/12/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)