On September 30, a recent SEC filing unveiled that Christ Revocable Trust, 10% Owner at Altair Engineering (NASDAQ:ALTR) made an insider sell. What Happened: A Form 4 filing with the U.S. Securities and Exchange Commission on Monday outlined that Trust executed a sale of 50,048 shares of Altair Engineering with a total value of $4,758,223. At Tuesday morning, Altair Engineering shares are down by 0.0%, trading at $95.51. Discovering Altair Engineering: A Closer LookAltair Engineering Inc is a provider of enterprise-class engineering software enabling origination of the entire product lifecycle…