0001415889-24-010278.txt : 20240404 0001415889-24-010278.hdr.sgml : 20240404 20240404161515 ACCESSION NUMBER: 0001415889-24-010278 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20240402 FILED AS OF DATE: 20240404 DATE AS OF CHANGE: 20240404 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: RA Capital Healthcare Fund LP CENTRAL INDEX KEY: 0001315082 ORGANIZATION NAME: STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-41989 FILM NUMBER: 24823288 BUSINESS ADDRESS: STREET 1: 200 BERKELEY STREET STREET 2: 18TH FLOOR CITY: BOSTON STATE: MA ZIP: 02116 BUSINESS PHONE: 6177782500 MAIL ADDRESS: STREET 1: 200 BERKELEY STREET STREET 2: 18TH FLOOR CITY: BOSTON STATE: MA ZIP: 02116 FORMER NAME: FORMER CONFORMED NAME: RA Capital Biotech Fund LP DATE OF NAME CHANGE: 20050121 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: RA CAPITAL MANAGEMENT, L.P. CENTRAL INDEX KEY: 0001346824 ORGANIZATION NAME: STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-41989 FILM NUMBER: 24823289 BUSINESS ADDRESS: STREET 1: 200 BERKELEY STREET, 18TH FLOOR CITY: BOSTON STATE: MA ZIP: 02116 BUSINESS PHONE: 617-778-2500 MAIL ADDRESS: STREET 1: 200 BERKELEY STREET, 18TH FLOOR CITY: BOSTON STATE: MA ZIP: 02116 FORMER NAME: FORMER CONFORMED NAME: RA CAPITAL MANAGEMENT, LLC DATE OF NAME CHANGE: 20051213 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: RA Capital Nexus Fund II, L.P. CENTRAL INDEX KEY: 0001825376 ORGANIZATION NAME: STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-41989 FILM NUMBER: 24823287 BUSINESS ADDRESS: STREET 1: 200 BERKELEY STREET, 18TH FLOOR CITY: BOSTON STATE: MA ZIP: 02116 BUSINESS PHONE: 617-778-2500 MAIL ADDRESS: STREET 1: 200 BERKELEY STREET, 18TH FLOOR CITY: BOSTON STATE: MA ZIP: 02116 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Shah Rajeev M. CENTRAL INDEX KEY: 0001619841 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-41989 FILM NUMBER: 24823285 MAIL ADDRESS: STREET 1: 200 BERKELEY STREET STREET 2: 18TH FLOOR CITY: BOSTON STATE: MA ZIP: 02116 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Kolchinsky Peter CENTRAL INDEX KEY: 0001384859 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-41989 FILM NUMBER: 24823286 MAIL ADDRESS: STREET 1: 200 BERKELEY STREET STREET 2: 18TH FLOOR CITY: BOSTON STATE: MA ZIP: 02116 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: Boundless Bio, Inc. CENTRAL INDEX KEY: 0001782303 STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834] ORGANIZATION NAME: 03 Life Sciences IRS NUMBER: 830751369 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 9880 CAMPUS POINT DRIVE STREET 2: SUITE 120 CITY: SAN DIEGO STATE: CA ZIP: 92121 BUSINESS PHONE: (858) 766-9912 MAIL ADDRESS: STREET 1: 9880 CAMPUS POINT DRIVE STREET 2: SUITE 120 CITY: SAN DIEGO STATE: CA ZIP: 92121 4 1 form4-04042024_040402.xml X0508 4 2024-04-02 1 0001782303 Boundless Bio, Inc. BOLD 0001346824 RA CAPITAL MANAGEMENT, L.P. 200 BERKELEY STREET BOSTON MA 02116 false false true false 0001315082 RA Capital Healthcare Fund LP 200 BERKELEY STREET BOSTON MA 02116 0 0 1 0 0001825376 RA Capital Nexus Fund II, L.P. 200 BERKELEY STREET BOSTON MA 02116 0 0 1 0 0001384859 Kolchinsky Peter C/O RA CAPITAL MANAGEMENT, L.P. 200 BERKELEY STREET BOSTON MA 02116 0 0 1 0 0001619841 Shah Rajeev M. RA CAPITAL MANAGEMENT, L.P. 200 BERKELEY STREET, 18TH FLOOR BOSTON MA 02116 0 0 1 0 0 Common Stock 2024-04-02 4 C 0 1587912 A 1587912 I See footnotes Common Stock 2024-04-02 4 P 0 296875 16 A 1884787 I See footnotes Common Stock 2024-04-02 4 C 0 280219 A 280219 I See footnotes Common Stock 2024-04-02 4 P 0 15625 16 A 295844 I See footnotes Series B Preferred Stock 2024-04-02 4 C 0 17000000 0 D Common Stock 871794 0 I See footnotes Series B Preferred Stock 2024-04-02 4 C 0 3000000 0 D Common Stock 153846 0 I See footnotes Series C Preferred Stock 2024-04-02 4 C 0 13964285 0 D Common Stock 716118 0 I See footnotes Series C Preferred Stock 2024-04-02 4 C 0 2464286 0 D Common Stock 126373 0 I See footnotes On April 2, 2024, each share of Series B Preferred Stock and Series C Preferred Stock automatically converted into shares of Common Stock on a 19.5-for-1 basis immediately prior to the closing of the Issuer's initial public offering. The shares of Series B Preferred Stock and Series C Preferred Stock had no expiration date. Held directly by RA Capital Healthcare Fund, L.P. (the "Fund"). RA Capital Management, L.P. (the "Adviser") is the investment manager for the Fund and RA Capital Nexus Fund II, L.P. (the "Nexus Fund II"). The general partner of the Adviser is RA Capital Management GP, LLC (the "Adviser GP"), of which Dr. Peter Kolchinsky and Mr. Rajeev Shah are the managing members. The Adviser, the Adviser GP, Dr. Kolchinsky, and Mr. Shah disclaim beneficial ownership of any of the reported securities, except to the extent of their pecuniary interest therein. Held directly by the Nexus Fund II. /s/ Peter Kolchinsky, Manager of RA Capital Management, L.P. 2024-04-04 /s/ Peter Kolchinsky, Manager of RA Capital Healthcare Fund GP, LLC the General Partner of RA Capital Healthcare Fund, L.P. 2024-04-04 /s/ Peter Kolchinsky, Manager of RA Capital Nexus Fund II GP, LLC the General Partner of RA Capital Nexus Fund II, L.P. 2024-04-04 /s/ Peter Kolchinsky, individually 2024-04-04 /s/ Rajeev Shah, individually 2024-04-04