Form 4 Filing for Bruce L. Claflin

This SEC Form 4 filing details a transaction by Bruce L. Claflin, a director at CIENA CORP. On September 24, 2026, Mr. Claflin disposed of 2,857 shares of Common Stock in an indirect manner, valued at $355.91 per share. This disposal was part of a contribution of common stock to an exchange fund. Following this transaction, Mr. Claflin indirectly holds 8,279 shares and directly holds 50,843 shares of CIENA CORP Common Stock. The filing also notes that shares reported include unvested Restricted Stock Units (RSUs). The shares held in trust for his spouse and children are disclaimed for beneficial ownership by Mr. Claflin.