The State Department confirmed Saturday that Pompeo, who is on a four-nation tour of Europe, would take part in the four-day Bilderberg meeting, which kicked off on Thursday in the picturesque Swiss town of Montreux.
His participation had not been previously mentioned in the official agenda and he did not figure on the list of some 130 elites from 23 countries participating in the event.
Already on the list is US President Donald Trump's son-in-law and advisor Jared Kushner, who might use the forum to try to drum up support for his yet to be unveiled Middle East peace plan.
Microsoft CEO Satya Nadella, NATO chief Jens Stoltenberg and elder statesman Henry Kissinger also figure on the list of participants, as do Dutch Prime Minister Mark Rutte, French Finance Minister Bruno Le Maire and German Defence Minister Ursula von der Leyen.
Sono lieto di ritrovare a Bellinzona il Segretario di Stato americano Michael Pompeo, che ho già avuto il piacere di incontrare lo scorso febbraio a Washington. Erano 20 anni che un segretario di Stato americano non veniva in Svizzera per un incontro bilaterale. Benvenuto ! ???? pic.twitter.com/LpOijA8TaW
— Ignazio Cassis (@ignaziocassis) June 2, 2019
The group, which has met every year since 1954 and was created as a forum for fostering dialogue between Europe and North America, is this year discussing a range of topics such as climate change, the future of capitalism, the ethics of Artificial Intelligence, China, Russia and Brexit, the organisers said.
The Trump administration has taken strong and controversial stances on a number of the topics on the agenda, including swelling tensions with Beijing, complex relations with Moscow and a more than sceptical attitude to calls to fight climate change.
Pompeo himself recently hailed that climate change was helping open new sea routes in the usually frozen Arctic.
The luxury hotel where the talks are taking place has placed high bushes all around its perimeters to keep the press at bay.
'Cheese and chocolate fan'
The participants are meanwhile held to the so-called Chatham House Rule, meaning that participants are free to use the information received, but may not reveal the identity nor the affiliation of the speaker.
The secretive nature of the group has given birth to conspiracy theories. Some have warned, for example, that Bilderberg is a group of rich and powerful kingmakers seeking to impose a one world government.
Pompeo arrived in Switzerland on Friday on the second leg of his European tour, following a stop in Berlin and before travelling on to The Hague and London.
On Saturday morning, he and his wife Susan had a guided tour of Bern's Old Town, and on Sunday he is due to meet with his Swiss counterpart Ignazio Cassis.
Grüessech Bern! Thanks to @ChristaMarkwald for a fascinating tour of the Federal Palace. I had the chance to visit UNESCO World Heritage Site Old Town Bern, the #Zytglogge, Münster Cathedral & the extraordinary view from the Rose Garden. Honored to be in this beautiful country! pic.twitter.com/zBYRfzC1Sa
— Secretary Pompeo (@SecPompeo) June 2, 2019
Asked why he chose to stay for so long in Switzerland – from Friday afternoon through Monday morning, Pompeo told a group of journalists travelling with him that he is a “big cheese and chocolate fan”.