Anecdotally, The Guardian has a lot of U.S. readers. I regularly read and donate to The Guardian. Their U.S. and California coverage is very good and seems to be continually improving.
Axios has an article about The Guardian's success in the U.S., but I don't have access behind the paywall.
Not sure what the verb was that is missing here, but The Guardian has offices in the US, reporters across the country, articles written solely for its US audience. If you only care about who owns it, then I guess it still counts as an overseas operation, but in most other senses, it really isn't. Also, by that metric, Fox News is an overseas entity.
Axios has an article about The Guardian's success in the U.S., but I don't have access behind the paywall.
https://www.axios.com/2025/05/06/the-guardian-us-expansion
Better resource:
https://uploads.guim.co.uk/2025/09/11/Guardian_Annual_Report...