Electra Therapeutics, Inc. Sample Contracts

August 20, 2026 Chris Clark, C.F.A. Re: Confirmatory Offer Letter Dear Mr. Clark,
Confirmatory Offer Letter • August 28th, 2026 • Electra Therapeutics, Inc. • Biological products, (no disgnostic substances)

You are currently employed by Electra Therapeutics, Inc. (the “Company”) as Chief Financial Officer. This letter agreement (“Agreement”) confirms the existing terms and conditions of your continuing employment in that role. This Agreement is contingent and shall only be effective immediately prior to such time as the U.S. Securities and Exchange Commission declares the Company’s registration statement on Form S-1 for its initial public offering effective (such date, the “Effective Date”).

• ] Shares Electra Therapeutics, Inc. UNDERWRITING AGREEMENT
Underwriting Agreement • September 14th, 2026 • Electra Therapeutics, Inc. • Biological products, (no disgnostic substances) • New York
ELECTRA THERAPEUTICS, INC. AMENDED AND RESTATED INVESTORS’ RIGHTS AGREEMENT October 15, 2025
Investors’ Rights Agreement • June 26th, 2026 • Electra Therapeutics, Inc. • Biological products, (no disgnostic substances) • Delaware

This AMENDED AND RESTATED INVESTORS’ RIGHTS AGREEMENT (the “Agreement”) is made as of October 15, 2025, by and among ELECTRA THERAPEUTICS, INC., a Delaware corporation (the “Company”), and the investors listed on Schedule A hereto, each of which is herein referred to as an “Investor” and collectively as the “Investors”.

INDEMNIFICATION AGREEMENT
Indemnification Agreement • August 28th, 2026 • Electra Therapeutics, Inc. • Biological products, (no disgnostic substances) • Delaware

This Indemnification Agreement is dated as of _________, 20__ (this “Agreement”) and is between Electra Therapeutics, Inc., a Delaware corporation (the “Company”), and [Name] (“Indemnitee”).

STOCK RESTRICTION AGREEMENT
Stock Restriction Agreement • September 14th, 2026 • Electra Therapeutics, Inc. • Biological products, (no disgnostic substances) • Delaware

This Stock Restriction Agreement (the “Agreement”) is made as of , by and between Electra Therapeutics, Inc., a Delaware corporation (the “Company”) and [ ] (“Holder”). Certain capitalized terms used below are defined in the terms and conditions set forth in Exhibit A attached to this Agreement, which are incorporated by reference.

OPTION CANCELLATION AGREEMENT
Option Cancellation Agreement • September 14th, 2026 • Electra Therapeutics, Inc. • Biological products, (no disgnostic substances) • Delaware

This OPTION CANCELLATION AGREEMENT (this “Agreement”) is made and entered into on September 11, 2026, by and between Electra Therapeutics, Inc. (the “Company”) and Quehuong (Kathy) Dong, Pharm.D., M.B.A. (“Optionee”).