Ciena and C3.ai executives execute significant stock sales

Ciena Corporation director Thomas Michael Nevens sold 3,738 shares of the company on September 23rd at an average price of $359.04, totaling approximately $1.34 million. This transaction reduced his direct ownership by 37.28% to 6,289 shares. This sale follows a quarterly earnings report where Ciena exceeded analyst estimates with earnings per share of $2.11 and a 37% year-over-year revenue increase to $1.67 billion.

Separately, C3.ai founder and CEO Thomas Siebel sold 444,248 shares in mid-September, generating approximately $4.78 million in gross proceeds. The sales were executed over two days under a Rule 10b5-1 trading plan. After the transactions, Siebel retains direct ownership of 722,362 shares. The sales occurred while C3.ai stock was trading near $10.65, significantly below its 52-week high of $20.22.