/usr/share/bash-completion/completions/ is in systemd 229-4ubuntu4.
This file is owned by root:root, with mode 0o755.
..
/usr/share/bash-completion/completions/bootctl
/usr/share/bash-completion/completions/busctl
/usr/share/bash-completion/completions/hostnamectl
/usr/share/bash-completion/completions/journalctl
/usr/share/bash-completion/completions/localectl
/usr/share/bash-completion/completions/loginctl
/usr/share/bash-completion/completions/networkctl
/usr/share/bash-completion/completions/systemctl
/usr/share/bash-completion/completions/systemd-analyze
/usr/share/bash-completion/completions/systemd-cat
/usr/share/bash-completion/completions/systemd-cgls
/usr/share/bash-completion/completions/systemd-cgtop
/usr/share/bash-completion/completions/systemd-delta
/usr/share/bash-completion/completions/systemd-detect-virt
/usr/share/bash-completion/completions/systemd-path
/usr/share/bash-completion/completions/systemd-run
/usr/share/bash-completion/completions/timedatectl