Question 1

How many shares of CIEN does D. E. Shaw & Co., Inc. own?

Accepted Answer

As of 2026-Q2, D. E. Shaw & Co., Inc. holds 133,195 shares of CIEN (CIENA CORP).

Question 2

What is D. E. Shaw & Co., Inc.'s CIEN position worth?

Accepted Answer

As of 2026-Q2, D. E. Shaw & Co., Inc.'s CIEN position is worth $65.3M.

Question 3

Is D. E. Shaw & Co., Inc. buying or selling CIEN?

Accepted Answer

In 2026-Q2, D. E. Shaw & Co., Inc. increased their CIEN position (+1394.6% change in shares).

Question 4

When did D. E. Shaw & Co., Inc. first buy CIEN?

Accepted Answer

Based on available 13F filings, D. E. Shaw & Co., Inc. first reported a position in CIEN in 2024-Q3. They have held the position across 28 quarters.

Quarter	Action	Shares	Change	Value	Weight	Price	Conviction
2026-Q2 Latest	Increased	133,195	+1394.6%	$65.3M	0.0%	$490.56	48
2026-Q1	Decreased	8,912	-35.7%	$3.5M	0.0%	$388.23	0
2025-Q4	Decreased	13,856	-79.8%	$3.2M	0.0%	$233.87	0
2025-Q3	Increased	68,712	+5.2%	$10M	0.0%	$145.67	29
2025-Q2	Decreased	65,331	-44.6%	$5.3M	0.0%	$81.33	0
2025-Q1	Increased	118,002	+646.9%	$7.1M	0.0%	$60.43	44
2024-Q4	Increased	15,800	+134.1%	$1.3M	0.0%	$84.81	41
2024-Q3	New	6,750	—	$415,733	0.0%	$61.59	33