The decisions by Chief Justice John G. Roberts Jr. and Samuel A. Alito Jr. came after both were required not to take part in Supreme Court cases because of their investments, The Washington Post reported Saturday.
Roberts last year unloaded shares worth $117,000 to $265,000 in Becton Dickinson, Cisco Systems, Citigroup and Merck, disclosures show.
The Post said after selling shares in Citigroup and Cisco, Roberts could participate in ongoing cases linked to the companies.
Alito unloaded shares valued $15,000 to $50,000 in Intel, and lessened investments in Bristol-Myers Squibb, Exxon Mobil and McDonald's, annual reports indicate.
Concerns regarding justices' stock holdings came to light again in May when the nation's highest court was unable to gather the required number of justices to decide whether to become involved in a case, the newspaper said.