Elon Musk photo, Twitter logos and U.S. dollar banknotes are seen in this illustration, August 10, 2022.
The banks, which include Morgan Stanley and Barclays Plc (BARC.L), did not respond to requests for comment.
Representatives for Musk and Twitter did not immediately respond to requests for comment.
He has not revealed details on Twitter's new leadership and business plan, and many debt investors are holding back until they get more details on that front, the sources said.
The debt package for the Twitter deal is comprised of junk-rated loans, which are risky because of the amount of debt the company is taking on, as well as secured and unsecured bonds.