"The proposed takeover of Qualcomm by the Purchaser is prohibited, and any substantially equivalent merger, acquisition, or takeover, whether effected directly or indirectly, is also prohibited", the order issued by Trump on Monday said.
Trump issued an executive order on Monday that prohibits Broadcom from acquiring Qualcomm for roughly $117 billion, citing national security concerns.
The Treasury Department said in a letter over the weekend that Broadcom had violated a Committee on Foreign Investment in the USA order on three separate occasions by failing to give advance notice before taking actions such as lodging takeover-related securities filings in the United States.
The rival chip giants were told to notify CFIUS in writing that all aspects of the order had been followed.
Updates with previous failed deals starting in fourth paragraph.
Broadcom shares closed the trading day up 3.5 per cent to $262.84 and gained slightly more in after-market trades. Westwood Holdings Group Inc. purchased a new position in shares of QUALCOMM during the 2nd quarter valued at about $114,000.
By contrast, some 44% of analysts felt that way about Qualcomm before Broadcom made its first bid for the company in November.
U.S. top diplomat to arrive in Kenya on Friday
Tillerson , on a five-country swing across Africa, has emphasized his trip is aimed at hearing African leaders' concerns. Chinese influence does not however take away the historical ties between Washington and African capitals.
In the coming days or weeks after Broadcom's legal counsel has reviewed their options, we're bound to hear a more extensive response, so stay tuned.
Broadcom had struggled to complete its proposed deal to buy Qualcomm which had cited several concerns including the price offered and potential antitrust hurdles.
"In the absence of information that changes CFIUS's assessment of the national security risks posed by this transaction, CFIUS would consider taking further action, including but not limited to referring the transaction to the President for decision", the letter said.
Fortune contacted Broadcom and Qualcomm for comment and will update this story if they respond.
A sign sits atop the Qualcomm headquarters building in San Diego.
The prospect of a weakened Qualcomm creating an innovation void in USA telecommunications is at the crux of CFIUS's national security concerns with a Broadcom takeover.
If research and development at Qualcomm foundered under Broadcom, the administration was concerned China-based Huawei Technologies would have an opening to become an even bigger player in the booming market of producing chips that power smartphones, smart home gadgets and other mobile devices. Qualcomm said it would challenge that fine.
Moorhead likened the idea of merging the companies to mixing oil and water.
Qualcomm and a host of other big technology companies are racing to build a next-generation nationwide network known as "5G" with download speeds that could be 100 times faster than what most consumers experience now on their wireless service. The decision to block the deal was unveiled just hours after Hock Tan, the chief executive officer of Singapore-based Broadcom, met with officials at the Pentagon in a last-ditch effort to salvage the transaction.