0002035788-26-000001.txt : 20260430 0002035788-26-000001.hdr.sgml : 20260430 20260430173055 ACCESSION NUMBER: 0002035788-26-000001 CONFORMED SUBMISSION TYPE: D/A 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)(1) ITEM INFORMATION: Section 3(c)(7) FILED AS OF DATE: 20260430 DATE AS OF CHANGE: 20260430 EFFECTIVENESS DATE: 20260430 FILER: COMPANY DATA: COMPANY CONFORMED NAME: Arrowstreet (Delaware) Custom Alpha Extension Fund Q L.P. CENTRAL INDEX KEY: 0002035788 ORGANIZATION NAME: EIN: 992158720 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: D/A SEC ACT: 1933 Act SEC FILE NUMBER: 021-526932 FILM NUMBER: 26927481 BUSINESS ADDRESS: STREET 1: 200 CLARENDON STREET STREET 2: 30TH FLOOR CITY: BOSTON STATE: MA ZIP: 02116 BUSINESS PHONE: (617) 919-0000 MAIL ADDRESS: STREET 1: 200 CLARENDON STREET STREET 2: 30TH FLOOR CITY: BOSTON STATE: MA ZIP: 02116 D/A 1 primary_doc.xml X0708 D/A LIVE 0002035788 Arrowstreet (Delaware) Custom Alpha Extension Fund Q L.P. 200 CLARENDON STREET 30TH FLOOR BOSTON MA MASSACHUSETTS 02116 (617) 919-0000 DELAWARE None None Limited Partnership true 2024 Limited Partnership Arrowstreet Capital 200 Clarendon Street 30th Floor Boston MA MASSACHUSETTS 02116 Promoter in its capacity as Investment Manager of the Issuer Brattle GP LLC Arrowstreet Capital 200 Clarendon Street 30th Floor Boston MA MASSACHUSETTS 02116 Executive Officer in its capacity as General Partner of the Issuer Pooled Investment Fund Hedge Fund false Decline to Disclose 06b 3C 3C.1 3C.7 true 0002054936-25-000036 2024-11-01 true true false 100000 None None None None N/A N/A N/A XX Unknown None All States true Indefinite 3933430949 Indefinite false 1 0 0 0 Certain management fees will be paid to Arrowstreet Capital, Limited Partnership, as described in the Issuer's Confidential Private Placement Memorandum false Arrowstreet (Delaware) Custom Alpha Extension Fund Q L.P. Brian Neumann Brian Neumann Authorized Signatory of Arrowstreet Capital, LP 2026-04-30