0000899243-23-019370.txt : 20230921 0000899243-23-019370.hdr.sgml : 20230921 20230921162357 ACCESSION NUMBER: 0000899243-23-019370 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20230919 FILED AS OF DATE: 20230921 DATE AS OF CHANGE: 20230921 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Harwin Peter Evan CENTRAL INDEX KEY: 0001663607 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-38541 FILM NUMBER: 231269372 MAIL ADDRESS: STREET 1: 2001 MARKET STREET STREET 2: SUITE 2500 CITY: PHILADELPHIA STATE: PA ZIP: 19103 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Kiselak Tomas CENTRAL INDEX KEY: 0001830177 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-38541 FILM NUMBER: 231269373 MAIL ADDRESS: STREET 1: 2001 MARKET STREET, SUITE 2500 CITY: PHILADELPHIA STATE: PA ZIP: 19103 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Fairmount Funds Management LLC CENTRAL INDEX KEY: 0001802528 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-38541 FILM NUMBER: 231269374 BUSINESS ADDRESS: STREET 1: 200 BARR HARBOR DRIVE STREET 2: SUITE 400 CITY: WEST CONSHOHOCKEN STATE: PA ZIP: 19428 BUSINESS PHONE: 267-262-5300 MAIL ADDRESS: STREET 1: 200 BARR HARBOR DRIVE STREET 2: SUITE 400 CITY: WEST CONSHOHOCKEN STATE: PA ZIP: 19428 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: Dianthus Therapeutics, Inc. /DE/ CENTRAL INDEX KEY: 0001690585 STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834] IRS NUMBER: 000000000 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 300 TECHNOLOGY SQUARE STREET 2: 8TH FLOOR CITY: CAMBRIDGE STATE: MA ZIP: 02139 BUSINESS PHONE: 857-201-2700 MAIL ADDRESS: STREET 1: 300 TECHNOLOGY SQUARE STREET 2: 8TH FLOOR CITY: CAMBRIDGE STATE: MA ZIP: 02139 FORMER COMPANY: FORMER CONFORMED NAME: Magenta Therapeutics, Inc. DATE OF NAME CHANGE: 20161121 4 1 doc4.xml FORM 4 SUBMISSION X0508 4 2023-09-19 0 0001690585 Dianthus Therapeutics, Inc. /DE/ DNTH 0001802528 Fairmount Funds Management LLC 200 BARR HARBOR DRIVE, SUITE 400 WEST CONSHOHOCKEN PA 19428 1 0 1 0 0001830177 Kiselak Tomas 200 BARR HARBOR DRIVE, SUITE 400 WEST CONSHOHOCKEN PA 19428 1 0 1 0 0001663607 Harwin Peter Evan 200 BARR HARBOR DRIVE, SUITE 400 WEST CONSHOHOCKEN PA 19428 1 0 1 0 0 Common Stock 2023-09-19 4 P 0 30000 13.20 A 1873833 I See footnote Consists of 30,000 shares of common stock purchased by Fairmount Healthcare Fund II LP ("Fund II"). Consists of (i) 58,857 shares of common stock held of record by Fairmount Healthcare Fund LP ("Fund I"), (ii) 1,752,830 shares of common stock held of record by Fund II and (iii) 62,146 shares of common stock held of record by Fairmount SPV III, LLC. Fairmount Funds Management LLC ("Fairmount") is the investment manager for Fund I and Fund II and is the Class A Member for Fairmount SPV III, LLC. The general partner of Fairmount is Fairmount Funds Management GP LLC ("Fairmount GP"), of which Peter Harwin and Tomas Kiselak are the managing members. Fairmount, Fairmount GP, Mr. Harwin, and Mr. Kiselak disclaim beneficial ownership of any of the reported securities, except to the extent of their pecuniary interest therein. Fairmount, Fund I, Fund II and Fairmount SPV III, LLC may each be deemed a director by deputization of the Issuer by virtue of the fact that Tomas Kiselak serves on the board of directors of the Issuer and is a Managing Member of Fairmount. /s/ Tomas Kiselak, Managing Member of Fairmount Funds Management LLC 2023-09-21 /s/ Tomas Kiselak 2023-09-21 /s/ Peter Harwin 2023-09-21