Short seller Hindenburg Research, known most recently for its long-running feud with Adani Enterprises, set its sights on a well known American target today: Super Micro Computer.

Heading into the cash open, shares are lower by about 8%. 

In a report released on its website Tuesday morning, the short seller alleged that the semiconductor/server company, which has seen its stock skyrocket over the last few years during the AI bubble, could be engaged in accounting manipulation and self dealing among family members.

Among other points, Hindenburg wrote:

"Beyond fresh questions around its revenue accounting, we found that Super Micro’s relationships with both disclosed and undisclosed related parties serve as fertile ground for dubious accounting," the report says.

"For example, disclosed related party suppliers Ablecom and Compuware, controlled by Super Micro CEO Charles Liang’s brothers, have been paid $983 million in the last 3 years. Ablecom is also partly owned by Super Micro CEO Charles Liang and his wife."

It continues: "The relationships seem oddly circular. Super Micro provides components to the entities which assemble them and sell them back to Super Micro. They also rent warehousing and factory space to Super Micro even though it has its own sprawling factory."

"Multiple former employees and channel partners confirmed that after-sales service is undermining Super Micro’s ability to retain customers. One former salesperson said: 'It’s their Achilles heel. It’s just horrible.'," Hindenburg wrote.

"All told, we believe Super Micro is a serial recidivist. It benefitted as an early mover but still faces significant accounting, governance and compliance issues and offers an inferior product and service now being eroded away by more credible competition," the report says.

You can read the full report here. 

We'll update this piece when and if the company responds.