ActorTrackr is an open source web application designed for storing, searching, and linking threat actor-related data. The platform aggregates information from users and public repositories including APTNotes and the 'APT Groups and Operations' spreadsheet. The application enables security professionals to maintain a centralized database of threat actor intelligence, facilitating data sharing and collaboration within the cybersecurity community. Users can contribute publicly available information to enhance the collective knowledge base. ActorTrackr supports the creation of internal instances for organizations that need to manage sensitive threat intelligence data separately from public repositories. The tool provides search and linking capabilities to help analysts identify relationships between different threat actors and their operations. Installation is supported through provided setup scripts, and the application is distributed under the Apache License, Version 2.0 by Lookingglass Cyber Solutions.