Contract analysis

I. Executive Summary The purpose of this memorandum is to provide the Special Committee of the Board of Directors of Penterra Pharmaceuticals Corp. ("Penterra" or the "Company") with a comprehensive analysis of the Delaware legal framework governing the proposed acquisition of Caliston BioSciences, Inc. ("Caliston"), a transaction in which the Company's Chairman and Chief Executive Officer, Dr. Marcus Hale, holds a 2

II. Factual Background Relevant to the Legal Analysis The following factual summary is based on information provided to Calderwood & Harkness LLP through the Company's regular outside counsel, Alcott, Barringer & Cole LLP, as well as materials reviewed in connection with the formation of the Special Committee. We present these facts to establish the analytical foundation for the legal discussion that follows. A. The

III. Delaware General Corporation Law §144 — Interested Director Transactions A. Statutory Text and Purpose

Section 144 of the Delaware General Corporation Law provides the foundational statutory framework governing transactions between a corporation and an entity in which one or more of the corporation's directors or officers has a financial interest. The purpose of §144 is to provide a safe harbor that protects interested director transactions from automatic voidability based solely on the existence of the director's int

Section 144 provides that a contract or transaction between a corporation and one or more of its directors or officers, or between a corporation and any other corporation, partnership, association, or other organization in which one or more of its directors or officers are directors or officers, or have a financial interest, shall not be void or voidable solely for such reason, or solely because the director or offic

IV. The Entire Fairness Doctrine A. Overview When a transaction involves a conflict of interest on the part of a director who is also a controlling stockholder or who otherwise stands on both sides of a transaction, Delaware courts apply the "entire fairness" standard of review — the most exacting standard in Delaware corporate law. The entire fairness standard requires that the defendants demonstrate that the transa

V. The MFW Framework — Pathway to Business Judgment Review A. Overview of the MFW Decision In Kahn v. M&F Worldwide Corp., 88 A.3d 635 (Del. 2014), the Delaware Supreme Court established a landmark framework under which a conflicted transaction may receive deferential business judgment review — rather than the searching entire fairness review — provided that specific procedural conditions are satisfied from the incep

VI. Specific Issues Requiring Attention A. Dr. Hale's Delayed Disclosure Dr. Hale did not disclose his 28.5% equity interest in Caliston to the Penterra board of directors until February 14, 2023 — the same date on which he first proposed the acquisition. This is notable because Dr. Hale acquired his Caliston interest through investments in the Seed, Series A, and Series B financing rounds and has served as a non-vot