Certain Stock Options of Nkarta, Inc. are subject to a Lock-Up Agreement Ending on 6-JAN-2021. These Stock Options will be under lockup for 180 days starting from 10-JUL-2020 to 6-JAN-2021. Details: Executive officers, directors and substantially all other stockholders, have agreed, subject to certain exceptions, not to offer, sell, assign, transfer, pledge, contract to sell, or otherwise dispose of or announce the intention to otherwise dispose of, or enter into any swap, hedge or similar agreement or arrangement that transfers, in whole or in part, the economic consequence of ownership of, directly or indirectly, or make any demand or request or exercise any right with respect to the registration of, or file with the SEC a registration statement under the Securities Act relating to, any common stock or securities convertible into or exchangeable or exercisable for any common stock without the prior written consent of Cowen and Company, LLC for a period of 180 days after the date of the pricing of the offering.