The world of trillion-dollar-plus wealth funds is small but diverse. Norway’s ($1.6 trillion and run by Nicolai Tangen, who features in today’s Boardroom Sensemaker) is a model of transparency. Abu Dhabi’s is not. $1.5 trillion-worth of state and private assets there are controlled by one man, Sheikh Tahnoon bin Zayed Al Nahyan, who is hard to get to. Luckily for anyone who wants to, Bloomberg’s Ben Bartenstein has talked to several dozen sources on and off the record to paint a colourful picture of the shifting, palm-studded organogram with Tahnoon at its centre. Key gatekeepers are the Moroccan-born, UK-educated Sofia Abdellatif Lasky and Bill Murray, an ex-British diplomat. Gatekeepers to the gatekeepers include Said Hariri, the former Lebanese prime minister, and Melissa Moncada, a former Miss Globe Colombia. Trump has his own in – his son-in-law Jared Kushner, whose Affinity Partners fund has investments from UAE as well as $2 billion from Riyadh. Trump and Kushner may find Norway a tougher nut to crack.