/usr/share/plasma/plasmoids/org.kde.plasma.kimpanel/ is in plasma-widgets-addons 4:5.5.5-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/plasma/plasmoids/org.kde.plasma.kimpanel/contents/
/usr/share/plasma/plasmoids/org.kde.plasma.kimpanel/contents/config/
/usr/share/plasma/plasmoids/org.kde.plasma.kimpanel/contents/config/config.qml
/usr/share/plasma/plasmoids/org.kde.plasma.kimpanel/contents/config/main.xml
/usr/share/plasma/plasmoids/org.kde.plasma.kimpanel/contents/ui/
/usr/share/plasma/plasmoids/org.kde.plasma.kimpanel/contents/ui/ActionMenu.qml
/usr/share/plasma/plasmoids/org.kde.plasma.kimpanel/contents/ui/ConfigAppearance.qml
/usr/share/plasma/plasmoids/org.kde.plasma.kimpanel/contents/ui/InputPanel.qml
/usr/share/plasma/plasmoids/org.kde.plasma.kimpanel/contents/ui/StatusIcon.qml
/usr/share/plasma/plasmoids/org.kde.plasma.kimpanel/contents/ui/main.qml
/usr/share/plasma/plasmoids/org.kde.plasma.kimpanel/metadata.desktop