0002048092-25-000002.txt : 20250131 0002048092-25-000002.hdr.sgml : 20250131 20250131160642 ACCESSION NUMBER: 0002048092-25-000002 CONFORMED SUBMISSION TYPE: D PUBLIC DOCUMENT COUNT: 1 ITEM INFORMATION: 06b ITEM INFORMATION: Investment Company Act Section 3(c) ITEM INFORMATION: Section 3(c)(1) ITEM INFORMATION: Section 3(c)(7) FILED AS OF DATE: 20250131 DATE AS OF CHANGE: 20250131 EFFECTIVENESS DATE: 20250131 FILER: COMPANY DATA: COMPANY CONFORMED NAME: William Blair MB Investments, L.P. - WD Series CENTRAL INDEX KEY: 0002048092 ORGANIZATION NAME: IRS NUMBER: 000000000 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: D SEC ACT: 1933 Act SEC FILE NUMBER: 021-537051 FILM NUMBER: 25578410 BUSINESS ADDRESS: STREET 1: WILLIAM BLAIR BUILDING STREET 2: 150 N. RIVERSIDE PLAZA CITY: CHICAGO STATE: IL ZIP: 60606 BUSINESS PHONE: 312-236-1600 MAIL ADDRESS: STREET 1: WILLIAM BLAIR BUILDING STREET 2: 150 N. RIVERSIDE PLAZA CITY: CHICAGO STATE: IL ZIP: 60606 FORMER COMPANY: FORMER CONFORMED NAME: William Blair MB Investments, L.P. - WCM Partners 2024 Series DATE OF NAME CHANGE: 20241210 D 1 primary_doc.xml X0708 D LIVE 0002048092 William Blair MB Investments, L.P. - WD Series WILLIAM BLAIR BUILDING 150 N. RIVERSIDE PLAZA CHICAGO IL ILLINOIS 60606 312-236-1600 DELAWARE William Blair MB Investments, L.P. - WCM Partners 2024 Series Limited Partnership true 2024 General Partner William Blair MB Investments GP, L.L.C. William Blair Building 150 N. Riverside Plaza Chicago IL ILLINOIS 60606 Promoter General Partner of the Issuer Kirsten Olsen William Blair Building 150 N. Riverside Plaza Chicago IL ILLINOIS 60606 Director Managing Director, Head of Private Capital Pooled Investment Fund Private Equity Fund false Decline to Disclose 06b 3C 3C.1 3C.7 false 2024-12-18 false true false 0 Indefinite 8025000 Indefinite false 27 0 0 0 The Issuer's General Partner or an affiliate of the Issuer's General Partner, may be entitled to receive a fee in accordance with the Issuer's governing documentation, as amended from time to time. false William Blair MB Investments, L.P. - WD Series /s/ Kirsten Olsen Kirsten Olsen Managing Director of the General Partner of the Issuer 2025-01-31