Question 1

How many shares of CIEN does DIAMOND HILL CAPITAL MANAGEMENT INC own?

Accepted Answer

As of 2026-Q1, DIAMOND HILL CAPITAL MANAGEMENT INC holds 58,545 shares of CIEN (CIENA CORP).

Question 2

What is DIAMOND HILL CAPITAL MANAGEMENT INC's CIEN position worth?

Accepted Answer

As of 2026-Q1, DIAMOND HILL CAPITAL MANAGEMENT INC's CIEN position is worth $22.7M.

Question 3

Is DIAMOND HILL CAPITAL MANAGEMENT INC buying or selling CIEN?

Accepted Answer

In 2026-Q1, DIAMOND HILL CAPITAL MANAGEMENT INC decreased their CIEN position (-67.9% change in shares).

Question 4

When did DIAMOND HILL CAPITAL MANAGEMENT INC first buy CIEN?

Accepted Answer

Based on available 13F filings, DIAMOND HILL CAPITAL MANAGEMENT INC first reported a position in CIEN in 2026-Q1. They have held the position across 15 quarters.