David M. Chacko - 15 Dec 2025 Form 4 Insider Report for Erasca, Inc. (ERAS)

Reporting relationship: CFO and CBO
Issuer ticker: ERAS
Reported as of: 15 Dec 2025
Net transaction value: +$21,250
SEC form: 4
Accepted by SEC: 30 Jan 2026, 09:04:03 UTC
Prior SEC filing: 05 Feb 2025
Source filing: View source filing
Reporting owner signature: /s/ Ebun Garner, Attorney-in-fact

Key filing fact

David M. Chacko filed Form 4 for Erasca, Inc. (ERAS) on 30 Jan 2026.

Key facts

This page summarizes David M. Chacko's Form 4 filing for Erasca, Inc. (ERAS).
2 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 30 Jan 2026, 09:04.

Change

Previous filing in this sequence was filed on 05 Feb 2025.
Current net transaction value: +$21,250.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001871801 Primary reporting owner

Chacko David M.

Relationship: CFO and CBO
Address: C/O ERASCA, INC., 3115 MERRYFIELD ROW, SUITE 300, SAN DIEGO
Signature: /s/ Ebun Garner, Attorney-in-fact
Signature date: 30 Jan 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

ERAS transaction

Common Stock

Other

Transaction value: $21,250
Shares: +17,793
Change %: +6.8%
Price: $1.19
Shares after: 279,980
Date: 15 Dec 2025
Ownership: Direct
Footnotes: F1, F2

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

ERAS transaction Derivative

Stock option (right to buy)

Award

Transaction value: $0
Shares: +640,000
Change %
Price: $0.000000
Shares after: 640,000
Date: 29 Jan 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 640,000
Exercise price: $10.31
Footnotes: F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

Shares purchased under the Company's 2021 Employee Stock Purchase Plan

Footnote F2

The purchase price was calculated in accordance with the issuer's 2021 Employee Stock Purchase Plan.

Footnote F3

1/48th of the shares subject to the option vest monthly on the 29th day of each month (or the last day of February), starting in February 2026, subject to the Reporting Person's continuous service to the issuer on each such vesting date.