1、S-1 1 d129231ds1.htm S-1Table of ContentsAs filed with the Securities and Exchange Commission on January 14,2022.Registration No.333-UNITED STATESSECURITIES AND EXCHANGE COMMISSIONWashington,D.C.20549FORM S-1REGISTRATION STATEMENTUNDERTHE SECURITIES ACT OF 1933ARCELLX,INC.(Exact name of Registrant a
2、s specified in its charter)Delaware 2836 47-2855917(State or other jurisdiction ofincorporation or organization)(Primary Standard IndustrialClassification Code Number)(I.R.S.EmployerIdentification Number)25 West Watkins Mill Road,Suite AGaithersburg,MD 20878(240)327-0603(Address,including zip code,a
3、nd telephone number,including area code,of Registrants principal executive offices)Rami ElghandourPresident,Chief Executive Officer and Chairman of the Board of DirectorsArcellx,Inc.25 West Watkins Mill Road,Suite AGaithersburg,MD 20878(240)327-0603(Name,address,including zip code,and telephone numb
4、er,including area code,of agent for service)Copies to:Dan KoeppenMegan J.BaierJennifer FangWilson Sonsini Goodrich&Rosati,P.C.1301 Avenue of the Americas40th FloorNew York,New York 10019(212)999-5800 Lisa FirenzeJeffries L.Oliver-LiWilmer Cutler Pickering Hale and Dorr LLP7 World Trade Center250 Gre
5、enwich StreetNew York,New York 10007(212)230-8800Approximate date of commencement of proposed sale to the public:As soon as practicable after the effective date of this registration statement.If any of the securities being registered on this form are to be offered on a delayed or continuous basis pu
6、rsuant to Rule 415 under the Securities Act of 1933,check thefollowing box.If this form is filed to register additional securities for an offering pursuant to Rule 462(b)under the Securities Act,please check the following box and list the Securities Actregistration statement number of the earlier ef