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<ACCEPTANCE-DATETIME>20260828163008
ACCESSION NUMBER: 0001104659-26-103228
CONFORMED SUBMISSION TYPE: 8-K
PUBLIC DOCUMENT COUNT: 23
CONFORMED PERIOD OF REPORT: 20260826
ITEM INFORMATION: Entry into a Material Definitive Agreement
ITEM INFORMATION: Unregistered Sales of Equity Securities
ITEM INFORMATION: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers
ITEM INFORMATION: Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year
ITEM INFORMATION: Other Events
ITEM INFORMATION: Financial Statements and Exhibits
FILED AS OF DATE: 20260828
DATE AS OF CHANGE: 20260828

FILER:

 COMPANY DATA: 
 COMPANY CONFORMED NAME: Rainier Acquisition Corp
 CENTRAL INDEX KEY: 0002147219
 STANDARD INDUSTRIAL CLASSIFICATION: BLANK CHECKS [6770]
 ORGANIZATION NAME: 03 Life Sciences
 EIN: 981782716
 STATE OF INCORPORATION: E9
 FISCAL YEAR END: 1231

 FILING VALUES:
 FORM TYPE: 8-K
 SEC ACT: 1934 Act
 SEC FILE NUMBER: 001-43462
 FILM NUMBER: 261340772

 BUSINESS ADDRESS: 
 STREET 1: 1 PENN PLAZA, 48TH FLOOR
 CITY: NEW YORK
 STATE: NY
 ZIP: 10119
 BUSINESS PHONE: 646-984-6215

 MAIL ADDRESS: 
 STREET 1: 1 PENN PLAZA, 48TH FLOOR
 CITY: NEW YORK
 STATE: NY
 ZIP: 10119
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