A congressional watchdog is recommending the subpoena of former Health and Human Services Secretary Tom Price Thomas (Tom) Edmunds PriceConspicuous by their absence from the Republican Convention Coronavirus Report: The Hill's Steve Clemons interviews Chris Christie Trump flails as audience dwindles and ratings plummet MORE after he refused to cooperate in its probe of Rep. Chris Collins Christopher (Chris) Carl CollinsConspicuous by their absence from the Republican Convention NY Republican Chris Jacobs wins special election to replace Chris Collins 5 things to watch in Tuesday's primaries MORE (R-N.Y.) related to stock sales of an Australian biotechnology firm.

The Office of Congressional Ethics (OCE) on Thursday said Price was one of 10 individuals or entities that refused to cooperate with the investigation into whether Collins improperly shared nonpublic information in the purchase of Innate Immunotherapeutics Limited stocks.

Collins sits on Innate’s board and is the company’s largest shareholder.

In its report, the watchdog said there is "substantial reason to believe" Collins violated federal law and House rules, recommending the House Ethics Committee probe the claims.

OCE, an independent entity that reviews allegations against House members, also advised issuing a subpoena for Price to determine what he knew about the stocks.

Innate said it sold nearly $1 million in stock in discounted shares to Price while he was still a congressman, according to a Wall Street Journal report.

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Price came under fire during his confirmation hearings for stock trades made while he was involved in health-care legislation as a member of Congress.

Price defended his stock trades in the hearings and denied wrongdoing.

Democrats said he could have broken insider trading laws or a law against trading on congressional knowledge.

Price sold his shares of Innate in February, earning at least $225,000 on a $94,000 investment, according to congressional disclosure forms. The sales were made to comply with the ethics agreement he signed when he became the Health secretary.

Price resigned as Health secretary late last month after intense criticism of his use of private jets for professional trips at taxpayer expense, reportedly racking up more than $1 million in flights in just eight months.