This is a little assortment of places where I’ve found Lisp is in the world:

Note: Some of these might be stretches, but I want to show the general, influence that my favourite language has had on the world

Autodesk uses AutoLisp as a scripting language for their products

Their forums sometimes help me solve CL stuff as well

SCI engine used for Sierra adventure games uses an object oriented Lisp

Kandria a new indie game developed in CL

Spycursion is a CL game in development by (defun games ())

GCC creates many different trees during compilation, some of the later ones are outputted in Lisp list syntax

Guix is a package manager written in Scheme, capable of running a distro (it leans on the Nix daemon to run the builds, which is sadly C++)

Shepherd is an Init system written in Guile Scheme

GNU utilities either do now or plan to ship with extensibility through Guile Scheme (writing inline Lisp in makefiles for example)

This article[a] on Grammarly states that

[a]

Grammarly uses Common Lisp in production

Hipmunk uses Lisp

The London underground somehow uses Lisp

Another article[a] confirms the above and adds more

[a]

Boeing 747 and 777 for both internal software and

Boeing and Airbus apparently use Piano

which is a CL program for aircraft design

Circle CI

Hacker News is written in Arc

Franz Inc. uses CL heavily for data analysis

The original Zork was written in a very simple Lisp

Reddit 1.0 was written in Common Lisp[a]

[a]

If you can setup the database should be perfectly runnable today

pgloader got a rewrite in Common Lisp[a] around 2014 for performance reasons

[a]

Quil[a] is a language (and associated Quantum Virtual Machine) written in Common Lisp

[a]

Mezzano[a] is a working operating system written in pure CL

[a]

Even boots on my hardware and runs absolutely smooth