DiPerna Dino, EVP and Chief R&D Officer at Ciena Corporation, has filed 57 Form 4 transactions, all in CIEN stock. The pattern is one-sided: zero open-market purchases and zero acquisitions, against $2,754,267 in total sales. Every discretionary transaction in the record is a sale, with the remaining filings coded as automatic tax withholdings (F) tied to equity vesting.
The recent activity shows this bias continuing. On September 16, 2026, DiPerna sold CIEN shares worth $87,150, following an $80,890 sale on September 15. A larger sale of $175,617 occurred on July 15. The biggest single-day disposal came on April 15, 2026, when two sales totaled $1,334,693. A January 15 sale added $622,223. The September 20 filings, five separate F transactions worth a combined $716,086, are mechanical withholdings for tax obligations, not discretionary trades.
The sales cluster around quarterly dates, which is consistent with a pre-arranged trading plan, though the filings do not state that. The dollar values vary widely, from roughly $71,000 to over $700,000 per transaction. Since the start of 2026, DiPerna has sold approximately $2.3 million in CIEN stock while buying none. The most recent open-market sale was September 16, 2026, at $87,150.
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