A Boeing shareholder is suing the firm for allegedly hiding problems with its 737 Max jet to drive on its shares.

Shareholder Richard Seeks asserts that Boeing should have informed investors concerning security problems with its best-selling plane. Instead, it pushed up the stock to synthetic highs before a second fatal wreck in March sent shares tumbling by talking about sales, he says.

The lawsuit called Boeing CEO Dennis Muilenburg and also the chief financial officer, Gregory Smith.

The business misled investors”by mentioning its growth prospects and sustainability, increasing advice, and maintaining that the Boeing 737 MAX was the safest plane to fly the skies,” the suit alleges. By doing so, investors bought shares at”artificially inflated prices”

The lawsuit filed in U.S. District Court for the Northern District of Illinois seeks class action status for all Boeing shareholders who purchased stock between January 8 and March 21.

Boeing didn’t immediately respond to your request for comment.

The company was named as a defendant in growing number of lawsuits filed by families of passengers killed off the coast of Indonesia on October 29 and also an undercover Airlines crash on March 10. All 346 aboard the two flights died.

Early a month its stock hit at $440, then fell to $362 following the Airlines crash. The stock was $369 in trading Wednesday.

Boeing announced that it is currently making adjustments to a procedure. It’s vowed to acquire the planes back in the atmosphere since a grounding that was global month. The company is asserting that it might provide airlines with certain security features previously offered as alternatives to them and that it might offer additional training.

The lawsuit said that Boeing should have advised investors that the security features were optional to the Max jets it sold. Additionally, it alleged that the company concealed from shareholders that the U.S. Federal Aviation Administration had granted it power to assist stipulate that the Max airplane was protected, along with allowing the enterprise to greenlight a more flight-control system involved in the 2 crashes.

The practice of delegating security checks to produces, by the FAA has come under fire. The company is also facing probes by the U.S. Justice Department and the Transportation Department’s inspector general.