Celldex Therapeutics, Inc. — Director's Dealing 2018

May 2, 2018

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Celldex Therapeutics, Inc. (CLDX)
CIK: 0000744218
Period of Report: 2018-05-01

Reporting Person: McMahon Gerald PhD (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2018-05-01	Common Stock, par value $0.001 per share	F	2813	$.74	Disposed	200549	Direct

Footnotes

F1: On November 28, 2016, in connection with the Reporting Person's employment separation agreement with Kolltan Pharmaceuticals, Inc., Reporting Person entered into a severance agreement (the "Severance Agreement") with Celldex Therapeutics, Inc. ("Issuer") whereby Issuer agreed to pay Reporting Person 267,356 shares of its common stock, par value $0.001 per share ("Common Stock") less required tax and other withholdings (the "Withholdings".) The Reporting Person previously reported ownership of such 267,356 shares on his Form 3 filed with the Securities and Exchange Commission on December 15, 2016. The shares, less Withholdings, are issuable to Reporting Person in equal installments through December 2018.

F2: Pursuant to the Severance Agreement, on May 1, 2018, the Issuer issued 5,541 shares of its Common Stock to the Reporting Person. This Form 4 reflects the disposition to the Issuer of 2,813 shares of its Common Stock to satisfy required Withholdings in connection with such issuance of Common Stock to the Reporting Person.