0001842537-26-000001.txt : 20260430 0001842537-26-000001.hdr.sgml : 20260430 20260430164616 ACCESSION NUMBER: 0001842537-26-000001 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) Alpha Extension Fund L.P. CENTRAL INDEX KEY: 0001842537 ORGANIZATION NAME: EIN: 853847568 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: D/A SEC ACT: 1933 Act SEC FILE NUMBER: 021-395513 FILM NUMBER: 26926530 BUSINESS ADDRESS: STREET 1: 200 CLARENDON STREET STREET 2: FLOOR 30 CITY: BOSTON STATE: MA ZIP: 02116 BUSINESS PHONE: 6179190000 MAIL ADDRESS: STREET 1: 200 CLARENDON STREET STREET 2: FLOOR 30 CITY: BOSTON STATE: MA ZIP: 02116 D/A 1 primary_doc.xml X0708 D/A LIVE 0001842537 Arrowstreet (Delaware) Alpha Extension Fund L.P. 200 CLARENDON STREET FLOOR 30 BOSTON MA MASSACHUSETTS 02116 6179190000 DELAWARE None None Limited Partnership true Limited Partnership Arrowstreet Capital 200 Clarendon Street Floor 30 Boston MA MASSACHUSETTS 02116 Promoter in its capacity as investment manager of the Issuer. LLC Arrowstreet Capital Brattle GP 200 Clarendon Street Boston MA MASSACHUSETTS 02116 Executive Officer in its capacity as the general partner of the issuer Pooled Investment Fund Hedge Fund false Decline to Disclose 06b 3C 3C.1 3C.7 true 0002054936-25-000039 2021-04-15 true true false 100000 none None None None none none none XX Unknown none All States false Indefinite 2544403094 Indefinite false 2 0 0 0 false Arrowstreet (Delaware) Alpha Extension Fund L.P. Brian Neumann Brian Neumann Partner, Head of Funds Group 2026-04-30