Then there's Saudi Arabia:
A pivotal moment in U.S.–Saudi relations occurred in May 2017 when President Donald Trump and King Salman bin Abdulaziz Al Saud signed a series of letters of intent for Saudi Arabia to purchase arms from the U.S., totalling $110 billion immediately and $350 billion over ten years.
In 2023, Saudi Arabia's Public Investment Fund (PIF) made a significant move by ordering up to 121 Boeing 787 Dreamliner aircraft for its new airline, Riyadh Air, and the existing Saudia Airlines, in a deal estimated at nearly $37 billion. This investment underscored Saudi Arabia's commitment to expanding its aviation sector and strengthening economic ties with the U.S
On May 13, 2025, the U.S.–Saudi Investment Forum convened in Riyadh. President Donald Trump and Saudi Crown Prince Mohammed bin Salman hosted the forum, which attracted prominent American business leaders, including Elon Musk (CEO of Tesla and SpaceX), Sam Altman (CEO of OpenAI), Larry Fink (CEO of BlackRock), and Andy Jassy (CEO of Amazon), and others.
The forum focused on enhancing cooperation in technology, defense, and finance sectors. Saudi Arabia pledged $600 billion in U.S. investments, with potential increases up to $1 trillion, encompassing defense deals, artificial intelligence initiatives, and capital investments.
https://en.wikipedia.org/wiki/Saudi_Arabia%E2%80%93United_States_relations