/usr/share/ is in at-spi2-core 2.18.3-4ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/dbus-1/
/usr/share/dbus-1/accessibility-services/
/usr/share/dbus-1/accessibility-services/org.a11y.atspi.Registry.service
/usr/share/dbus-1/services/
/usr/share/dbus-1/services/org.a11y.Bus.service
/usr/share/doc/
/usr/share/doc/at-spi2-core/
/usr/share/doc/at-spi2-core/NEWS.gz
/usr/share/doc/at-spi2-core/copyright
/usr/share/doc/at-spi2-core/README
/usr/share/upstart/
/usr/share/upstart/xdg/
/usr/share/upstart/xdg/autostart/
/usr/share/upstart/xdg/autostart/at-spi-dbus-bus.desktop
/usr/share/upstart/sessions/
/usr/share/upstart/sessions/at-spi2-registryd.conf
/usr/share/doc/at-spi2-core/changelog.Debian.gz