Question 1

How many shares of CIEN does FIRST MANHATTAN CO. LLC. own?

Accepted Answer

As of 2026-Q1, FIRST MANHATTAN CO. LLC. holds 33,819 shares of CIEN (CIENA CORP).

Question 2

What is FIRST MANHATTAN CO. LLC.'s CIEN position worth?

Accepted Answer

As of 2026-Q1, FIRST MANHATTAN CO. LLC.'s CIEN position is worth $13.1M.

Question 3

Is FIRST MANHATTAN CO. LLC. buying or selling CIEN?

Accepted Answer

In 2026-Q1, FIRST MANHATTAN CO. LLC. decreased their CIEN position (-26.7% change in shares).

Question 4

When did FIRST MANHATTAN CO. LLC. first buy CIEN?

Accepted Answer

Based on available 13F filings, FIRST MANHATTAN CO. LLC. first reported a position in CIEN in 2024-Q2. They have held the position across 30 quarters.

Quarter	Action	Shares	Change	Value	Weight	Price
2026-Q1 Latest	Decreased	33,819	-26.7%	$13.1M	0.0%	$333.07
2025-Q4	Decreased	46,141	-2.5%	$10.8M	0.0%	$238.36
2025-Q3	Decreased	47,341	-10.5%	$6.9M	0.0%	$144.12
2025-Q2	Decreased	52,872	-11.6%	$4.3M	0.0%	$82.12
2025-Q1	Decreased	59,827	-28.8%	$3.6M	0.0%	$61.56
2024-Q4	Decreased	84,044	-1.1%	$7.1M	0.0%	$85.01
2024-Q3	Decreased	84,944	-0.3%	$5.2M	0.0%	$61.81
2024-Q2	Decreased	85,169	-0.1%	$4.1M	0.0%	$48.18