0001437749-24-023533.txt : 20240726 0001437749-24-023533.hdr.sgml : 20240726 20240726105020 ACCESSION NUMBER: 0001437749-24-023533 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20240724 FILED AS OF DATE: 20240726 DATE AS OF CHANGE: 20240726 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: JANUS HENDERSON GROUP PLC CENTRAL INDEX KEY: 0001274173 STANDARD INDUSTRIAL CLASSIFICATION: INVESTMENT ADVICE [6282] ORGANIZATION NAME: 02 Finance STATE OF INCORPORATION: Y9 FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 000-22873 FILM NUMBER: 241144364 BUSINESS ADDRESS: STREET 1: 201 BISHOPSGATE CITY: LONDON STATE: X0 ZIP: EC2M 3AE BUSINESS PHONE: 442078181818 MAIL ADDRESS: STREET 1: 201 BISHOPSGATE CITY: LONDON STATE: X0 ZIP: EC2M 3AE FORMER NAME: FORMER CONFORMED NAME: HENDERSON GROUP PLC DATE OF NAME CHANGE: 20050511 FORMER NAME: FORMER CONFORMED NAME: HHG PLC DATE OF NAME CHANGE: 20031223 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Janus Henderson Biotech Innovation Master Fund Ltd CENTRAL INDEX KEY: 0002030299 ORGANIZATION NAME: STATE OF INCORPORATION: E9 FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 000-22873 FILM NUMBER: 241144363 BUSINESS ADDRESS: STREET 1: 151 DETROIT STREET CITY: DENVER STATE: CO ZIP: 80206 BUSINESS PHONE: 3033364030 MAIL ADDRESS: STREET 1: 151 DETROIT STREET CITY: DENVER STATE: CO ZIP: 80206 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: ARCA biopharma, Inc. CENTRAL INDEX KEY: 0000907654 STANDARD INDUSTRIAL CLASSIFICATION: IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES [2835] ORGANIZATION NAME: 03 Life Sciences IRS NUMBER: 363855489 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 10170 CHURCH RANCH WAY STREET 2: SUITE 100 CITY: WESTMINSTER STATE: CO ZIP: 80021 BUSINESS PHONE: 7209402200 MAIL ADDRESS: STREET 1: 10170 CHURCH RANCH WAY STREET 2: SUITE 100 CITY: WESTMINSTER STATE: CO ZIP: 80021 FORMER COMPANY: FORMER CONFORMED NAME: NUVELO INC DATE OF NAME CHANGE: 20030203 FORMER COMPANY: FORMER CONFORMED NAME: HYSEQ INC DATE OF NAME CHANGE: 19970610 4 1 rdgdoc.xml FORM 4 X0508 4 2024-07-24 0000907654 ARCA biopharma, Inc. ABIO 0001274173 JANUS HENDERSON GROUP PLC 201 BISHOPGATE LONDON X0 EC2M 3AE UNITED KINGDOM 1 0002030299 Janus Henderson Biotech Innovation Master Fund Ltd 201 BISHOPGATE LONDON X0 EC2M 3AE UNITED KINGDOM 1 0 Common Stock 2024-07-24 4 P 0 165000 3.20 A 2056312 I By Fund Common Stock 2024-07-24 4 P 0 17800 3.1795 A 2074112 I By Fund Common Stock 2024-07-24 4 P 0 7056 3.1573 A 2081168 I By Fund Common Stock 2024-07-25 4 P 0 30227 3.0533 A 2111395 I By Fund The securities reported are beneficially owned directly by Janus Henderson Biotech Innovation Master Fund Ltd. (the "Fund"). Janus Henderson Group plc has a 100% ownership stake in Janus Henderson Investors US LLC, which serve as the investment advisor to the Fund, and may therefore be deemed a beneficial owner of the securities reported herein. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of its pecuniary interest therein, if any. /s/ Michelle Rosenberg, CAO, General Counsel & Company Secretary 2024-07-26 /s/ Janus Henderson Biotech Innovation Master Fund Ltd., By: Janus Henderson Investors US LLC, By: Kristin Mariani, Chief Compliance Officer 2024-07-26