0002070677-25-000001.txt : 20250828 0002070677-25-000001.hdr.sgml : 20250828 20250828141145 ACCESSION NUMBER: 0002070677-25-000001 CONFORMED SUBMISSION TYPE: D PUBLIC DOCUMENT COUNT: 1 ITEM INFORMATION: Rule 506(b) provides a "safer harbor" for a private offering ITEM INFORMATION: Investment Company Act Section 3(c) ITEM INFORMATION: Section 3(c)(7) FILED AS OF DATE: 20250828 DATE AS OF CHANGE: 20250828 EFFECTIVENESS DATE: 20250828 FILER: COMPANY DATA: COMPANY CONFORMED NAME: Madison Dearborn Capital Partners IX-B, L.P. CENTRAL INDEX KEY: 0002070677 ORGANIZATION NAME: EIN: 332204658 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: D SEC ACT: 1933 Act SEC FILE NUMBER: 021-556114 FILM NUMBER: 251271551 BUSINESS ADDRESS: STREET 1: 70 WEST MADISON STREET, SUITE 4600 CITY: CHICAGO STATE: IL ZIP: 60602 BUSINESS PHONE: 312-895-1000 MAIL ADDRESS: STREET 1: 70 WEST MADISON STREET, SUITE 4600 CITY: CHICAGO STATE: IL ZIP: 60602 D 1 primary_doc.xml X0708 D LIVE 0002070677 Madison Dearborn Capital Partners IX-B, L.P. C/O MADISON DEARBORN PARTNERS 70 WEST MADISON STREET, SUITE 4600 CHICAGO IL ILLINOIS 60602 (312) 895-1000 DELAWARE None None Limited Partnership true 2024 PAUL J. FINNEGAN C/O MADISON DEARBORN PARTNERS 70 WEST MADISON STREET, SUITE 4600 CHICAGO IL ILLINOIS 60602 Executive Officer Promoter SAMUEL M. MENCOFF 70 WEST MADISON STREET, SUITE 4600 CHICAGO IL ILLINOIS 60602 Executive Officer Promoter ELIZABETH Q. BETTEN 70 WEST MADISON STREET, SUITE 4600 CHICAGO IL ILLINOIS 60602 Executive Officer Promoter MATTHEW W. NORTON 70 WEST MADISON STREET, SUITE 4600 CHICAGO IL ILLINOIS 60602 Executive Officer Promoter RICHARD H. COPANS 70 WEST MADISON STREET, SUITE 4600 CHICAGO IL ILLINOIS 60602 Executive Officer Promoter VAHE A. DOMBALAGIAN 70 WEST MADISON STREET, SUITE 4600 CHICAGO IL ILLINOIS 60602 Executive Officer Promoter JOHN ERIC KNUTSEN 70 WEST MADISON STREET, SUITE 4600 CHICAGO IL ILLINOIS 60602 Executive Officer Promoter MATTHEW W. RAINO 70 WEST MADISON STREET, SUITE 4600 CHICAGO IL ILLINOIS 60602 Executive Officer Promoter THOMAS S. SOULELES 70 WEST MADISON STREET, SUITE 4600 CHICAGO IL ILLINOIS 60602 Executive Officer Promoter TIMOTHY P. SULLIVAN 70 WEST MADISON STREET, SUITE 4600 CHICAGO IL ILLINOIS 60602 Executive Officer Promoter ANNIE S. TERRY 70 WEST MADISON STREET, SUITE 4600 CHICAGO IL ILLINOIS 60602 Executive Officer Promoter KARLA J. BULLARD 70 WEST MADISON STREET, SUITE 4600 CHICAGO IL ILLINOIS 60602 Executive Officer Promoter JASON SHIDELER 70 WEST MADISON STREET, SUITE 4600 CHICAGO IL ILLINOIS 60602 Executive Officer Promoter BRENDAN BARRETT 70 WEST MADISON STREET, SUITE 4600 CHICAGO IL ILLINOIS 60602 Executive Officer Promoter MICHAEL DOLCE 70 WEST MADISON STREET, SUITE 4600 CHICAGO IL ILLINOIS 60602 Executive Officer Promoter MATTHEW M DENISON 70 WEST MADISON STREET, SUITE 4600 CHICAGO IL ILLINOIS 60602 Executive Officer Promoter ALEX FISHER 70 WEST MADISON STREET, SUITE 4600 CHICAGO IL ILLINOIS 60602 Executive Officer Promoter BRANDON LEVITAN 70 WEST MADISON STREET, SUITE 4600 CHICAGO IL ILLINOIS 60602 Executive Officer Promoter Pooled Investment Fund Private Equity Fund false Decline to Disclose 06b 3C 3C.7 false true false true true false 0 JEFFERIES LLC 2347 None None 520 MADISON AVENUE NEW YORK NY NEW YORK 10022 All States false MAGENTA CAPITAL SERVICES LTD. None None None VICTORIA HOUSE THE VALLEY 1A ANGUILLA AI-2640 true 3000000000 0 3000000000 The general partner reserves the right to offer a greater or lesser amount of limited partner interests. The Total Offering Amount is the aggregate amount for the Issuer, paired fund, parallel fund and executive fund. false 0 0 true 0 true Placement agent fees to be paid based upon a fee schedule. Such fees are offset against the management fees payable by the Issuer. 0 true The general partner is entitled to a performance allocation. The investment manager is entitled to a management fee. The performance allocation and management fee are fully discussed in the Issuer's confidential offering materials. false Madison Dearborn Capital Partners IX-B, L.P. /S/ ANNIE S. TERRY ANNIE S. TERRY PARTNER AND GENERAL COUNSEL OF MM OF GP OF GP OF ISSUER 2025-08-28