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 2024-Q2. They have held the position across 15 quarters.

Quarter	Action	Shares	Change	Value	Weight	Price
2026-Q1 Latest	Decreased	58,545	-67.9%	$22.7M	0.1%	$333.07
2025-Q4	Decreased	182,577	-70.2%	$42.7M	0.2%	$238.36
2025-Q3	Decreased	612,861	-19.0%	$89.3M	0.4%	$144.12
2025-Q2	Decreased	756,571	-8.1%	$61.5M	0.3%	$82.12
2025-Q1	Decreased	823,081	-6.6%	$49.7M	0.2%	$61.56
2024-Q4	Decreased	881,131	-49.2%	$74.7M	0.3%	$85.01
2024-Q3	Decreased	1.7M	-11.8%	$106.9M	0.4%	$61.81
2024-Q2	Decreased	2M	-0.9%	$94.8M	0.4%	$48.18