Tender Offer Materials

Offer to Purchase for Cash
All Outstanding Shares of Common Stock of
FORTE BIOSCIENCES, INC.

at $77.00 per share of Common Stock

By

AVENA MERGER SUB INC., ARGENX BV, AND ARGENX SE

THE OFFER AND WITHDRAWAL RIGHTS EXPIRE ONE MINUTE AFTER 11:59 P.M., EASTERN TIME, ON AUGUST 26, 2026, UNLESS THE OFFER IS EXTENDED OR EARLIER TERMINATED

The Information Agent for the Offer is:

Innisfree M&A Incorporated
500 Fifth Avenue, 21st Floor
New York, NY 10110
Shareholders may call toll free: (877) 800-5190 from the U.S. and Canada, or +1 (412) 232-3651 from other countries
Banks and brokers may call collect: (212) 750-5833