STOCK TITAN

Erasca (ERAS) director Alexander Casdin awarded 29,888 stock options at $16.01 strike

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Erasca, Inc. director Alexander W. Casdin received a grant of stock options covering 29,888 shares of common stock. The options have an exercise price of $16.01 per share, expire on June 26, 2036, and vest 100% on June 26, 2027, contingent on his continued service.

Positive

  • None.

Negative

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Insights

Routine option grant to director with time-based vesting.

Erasca awarded Alexander W. Casdin stock options for 29,888 shares at an exercise price of $16.01 per share. The grant costs him nothing upfront and provides potential upside only if the stock trades above this level before expiration in 2036.

The options vest 100% on June 26, 2027, conditioned on his continuous service. This structure incentivizes longer-term board involvement rather than short-term trading. As a single compensation grant with no related sales, it is a neutral, standard governance and pay practice.

Insider Casdin Alexander W.
Role null
Type Security Shares Price Value
Grant/Award Stock option (right to buy) 29,888 $0.00 --
Holdings After Transaction: Stock option (right to buy) — 29,888 shares (Direct, null)
Footnotes (1)
  1. [object Object]
Options granted 29,888 options Stock option grant to Alexander W. Casdin
Exercise price $16.01 per share Strike price of granted stock options
Expiration date June 26, 2036 Option term end date
Vesting date June 26, 2027 100% of options vest on this date
Shares underlying options 29,888 shares Common stock underlying the option grant
Stock option financial
"Stock option (right to buy)"
A stock option is a contract that gives you the right to buy or sell a company's stock at a specific price within a certain time frame. People use them to potentially make money if the stock's price moves favorably or to protect against losses. It's like holding a coupon that can be used to buy or sell stock at a set price later on.
exercise price financial
"conversion_or_exercise_price": "16.0100""
The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.
vesting financial
"100% of the options to purchase shares vest on June 26, 2027"
Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.
expiration date financial
"expiration_date": "2036-06-26T00:00:00.000Z""
The expiration date is the deadline after which a financial contract, such as an option or a futures agreement, is no longer valid or can be exercised. It matters to investors because it determines the timeframe during which they can take action or benefit from the contract, similar to how a coupon or a food item has a limited period of usefulness. Once the expiration date passes, the contract loses its value or ability to be used.
derivative financial
""transaction_type": "derivative""
A derivative is a financial contract whose value depends on the price or performance of another asset or measure — for example a stock, index, interest rate, commodity, or currency. Investors use derivatives like insurance or leveraged bets to hedge risk, speculate, or gain exposure without owning the underlying asset; they can protect portfolios but also amplify losses and introduce counterparty and market risk.
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Learn about SEC filing dates
SEC Form 4
FORM 4UNITED 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*
Casdin Alexander W.

(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)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
06/26/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Stock option (right to buy)$16.0106/26/2026A29,88806/26/2027(1)06/26/2036Common Stock29,888$029,888D
Explanation of Responses:
1. 100% of the options to purchase shares vest on June 26, 2027, subject to the Reporting Person's continuous service to the Issuer on such vesting date.
/s/ Ebun S. Garner, as Attorney-in-Fact06/29/2026
** Signature of Reporting PersonDate
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)

FAQ

What did Erasca (ERAS) director Alexander W. Casdin report in this Form 4?

Alexander W. Casdin reported receiving a stock option grant for 29,888 shares of Erasca common stock. The options were awarded at no cost, have a $16.01 exercise price, and represent equity-based compensation rather than an open-market stock purchase or sale.

What are the key terms of Alexander W. Casdin’s Erasca (ERAS) stock options?

The grant covers 29,888 shares of Erasca common stock at an exercise price of $16.01. The options expire on June 26, 2036. They were issued at zero cost and become exercisable only after the stated vesting conditions are satisfied.

When do Alexander W. Casdin’s Erasca (ERAS) stock options vest?

All 29,888 stock options vest on June 26, 2027, in a single tranche. Vesting is conditioned on Casdin’s continuous service to Erasca through that date, aligning his long-term incentives with the company’s performance over the next several years.

How many Erasca (ERAS) options does Alexander W. Casdin hold after this transaction?

Following the reported transaction, Casdin holds 29,888 stock options linked to Erasca common stock. This reflects the entire newly granted award. The Form 4 shows no additional derivative positions in the derivative summary section for this reporting person.

Did Alexander W. Casdin buy or sell Erasca (ERAS) shares on the open market?

No open-market buy or sell was reported. The Form 4 shows a code “A” derivative transaction, indicating a grant or award of stock options. Casdin received 29,888 options as compensation instead of executing a market trade in Erasca shares.

What is the potential value driver of Alexander W. Casdin’s Erasca (ERAS) option grant?

Value depends on Erasca’s share price exceeding the $16.01 exercise price before the June 26, 2036 expiration. If the stock trades below that level, the options would hold little or no intrinsic value, making performance over the long term critical.