Castleark Management LLC

SEC CIK: 0001106832
Latest filing: Aug 14, 2026

SEC filings (opens in a new tab)

CIEN holding history

Ciena Corp in every 13F filed by Castleark Management LLC, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.

CIEN overview All 13F holders of CIEN Full Q2 2026 holdings

Shares (Q2 2022): 0; Sold out in Q2 2022
Value: $0
% of portfolio: 0.0%
Quarters held: 2; Since Q4 2021

Holdings of CIEN by Castleark Management LLC, by quarter
Quarter	Shares	Value	% of portfolio	Share change	Action	All holders
Q2 2022	0	$0	0.0%	−9,140−100.0%	Sold out	Holders
Q1 2022	9,140	$554.0K	<0.1%	−10,130−52.6%	Reduced	Holders
Q4 2021	19,270	$1.48M	0.1%	+19,270	New	Holders