What does CUSIP 171779309 represent in this 13F holders report?

CUSIP 171779309 is the security identifier for CIEN - CIENA CORP - Common Stock used to aggregate holder disclosures.

How many institutions held CIEN - CIENA CORP - Common Stock in Q1 2021?

446 institutional investors reported CIEN - CIENA CORP - Common Stock for Q1 2021. Use the holders table for investor-level position and value details.

CIENA CORP - Common Stock (CIEN)

CUSIP: 171779309

Q1 2021 13F Holders as of 31 Mar 2021

Type / Class: Equity / Common Stock
Shares outstanding: 140,931,584
Total 13F shares: 143,076,551
Share change: +214,384
Total reported value: $7,828,233,443
Put/Call ratio: 100%
Price per share: $54.72
Number of holders: 446
Value change: +$18,390,334
Number of buys: 204
Number of sells: 215

Quarterly Holders Quick Answers

What is CUSIP 171779309?
CUSIP 171779309 identifies CIEN - CIENA CORP - Common Stock in SEC institutional holdings data.

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Related Filing Research

Latest 13F filings for newly reported positions.
Latest Schedule 13D/13G reports for ownership changes outside 13F cadence.
Latest 10-Q/10-K reports for financial context tied to this issuer.
Recent insider transactions for executive and insider activity.
SEC investors directory and top value investors for manager drilldown.
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Explore More Reporting Periods

Jump to adjacent filing periods for faster comparison and easier crawl discovery.

Newer quarter: Q2 2021
Previous quarter: Q4 2020

Recent filing periods for CUSIP 171779309:

Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024

Top shareholders of CIEN - CIENA CORP - Common Stock (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.

Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Holder	Source	Role / Reporting	Ownership %	Shares	Holdings Value	12M Net Δ	As of	Details
BlackRock Finance, Inc.	13F	Company	10%	14,792,049	$781,761,000	—	31 Dec 2020	13F
VANGUARD GROUP INC	13F	Company	10%	14,312,747	$756,429,000	—	31 Dec 2020	13F
FMR LLC	13F	Company	3.6%	5,006,561	$264,597,000	—	31 Dec 2020	13F
SPRING CREEK CAPITAL LLC	13F	Company	3.3%	4,652,391	$245,879,000	—	31 Dec 2020	13F
STATE STREET CORP	13F	Company	2.6%	3,658,102	$193,331,000	—	31 Dec 2020	13F
CONGRESS ASSET MANAGEMENT CO	13F	Company	2.6%	3,594,491	$189,969,000	—	31 Dec 2020	13F
WELLINGTON MANAGEMENT GROUP LLP	13F	Company	2.4%	3,329,083	$175,942,000	—	31 Dec 2020	13F
BNP Paribas Asset Management Holding S.A.	13F	Company	2.2%	3,154,289	$166,704,000	—	31 Dec 2020	13F
FIRST TRUST ADVISORS LP	13F	Company	2.1%	2,908,660	$153,723,000	—	31 Dec 2020	13F
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	13F	Company	2%	2,802,104	$148,091,197	—	31 Dec 2020	13F
ALLIANCEBERNSTEIN L.P.	13F	Company	1.9%	2,624,648	$138,713,000	—	31 Dec 2020	13F
NORGES BANK	13F	Company	1.8%	2,559,822	$135,287,000	—	31 Dec 2020	13F
BANK OF AMERICA CORP /DE/	13F	Company	1.8%	2,467,172	$130,390,000	—	31 Dec 2020	13F
Bank of New York Mellon Corp	13F	Company	1.7%	2,424,039	$128,110,000	—	31 Dec 2020	13F
Neuberger Berman Group LLC	13F	Company	1.7%	2,334,067	$122,939,000	—	31 Dec 2020	13F
FIL Ltd	13F	Company	1.5%	2,115,263	$111,792,000	—	31 Dec 2020	13F
LSV ASSET MANAGEMENT	13F	Company	1.5%	2,088,814	$110,393,000	—	31 Dec 2020	13F
Nuveen Asset Management, LLC	13F	Company	1.5%	2,076,306	$109,733,000	—	31 Dec 2020	13F
Invesco Ltd.	13F	Company	1.5%	2,046,203	$108,142,000	—	31 Dec 2020	13F
JANUS HENDERSON GROUP PLC	13F	Company	1.4%	1,947,021	$102,872,000	—	31 Dec 2020	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	1.4%	1,928,706	$101,932,000	—	31 Dec 2020	13F
THRIVENT FINANCIAL FOR LUTHERANS	13F	Company	1.3%	1,822,340	$96,310,000	—	31 Dec 2020	13F
Swedbank	13F	Company	1.3%	1,800,000	$94,482,000	—	31 Dec 2020	13F
DEUTSCHE BANK AG\	13F	Company	1.3%	1,770,804	$93,587,000	—	31 Dec 2020	13F
DIMENSIONAL FUND ADVISORS LP	13F	Company	1.2%	1,700,993	$89,895,000	—	31 Dec 2020	13F
FRANKLIN RESOURCES INC	13F	Company	1.1%	1,582,588	$83,640,000	—	31 Dec 2020	13F
Ion Asset Management Ltd.	13F	Company	1.1%	1,487,209	$78,599,000	—	31 Dec 2020	13F
MENORA MIVTACHIM HOLDINGS LTD.	13F	Company	1%	1,419,262	$75,008,000	—	31 Dec 2020	13F
JPMORGAN CHASE & CO	13F	Company	1%	1,412,449	$74,648,000	—	31 Dec 2020	13F
SCHRODER INVESTMENT MANAGEMENT GROUP	13F	Company	0.94%	1,318,148	$69,664,000	—	31 Dec 2020	13F
ACADIAN ASSET MANAGEMENT LLC	13F	Company	0.93%	1,309,736	$69,222,000	—	31 Dec 2020	13F
Clal Insurance Enterprises Holdings Ltd	13F	Company	0.99%	1,400,000	$69,130,000	—	31 Dec 2020	13F
NORTHERN TRUST CORP	13F	Company	0.86%	1,215,659	$64,248,000	—	31 Dec 2020	13F
FORT PITT CAPITAL GROUP, LLC	13F	Company	0.83%	1,163,465	$61,489,000	—	31 Dec 2020	13F
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	13F	Company	0.79%	1,118,154	$59,094,000	—	31 Dec 2020	13F
SHAPIRO CAPITAL MANAGEMENT LLC	13F	Company	0.75%	1,063,776	$56,220,561	—	31 Dec 2020	13F
MORGAN STANLEY	13F	Company	0.74%	1,048,100	$55,392,000	—	31 Dec 2020	13F
BARROW HANLEY MEWHINNEY & STRAUSS LLC	13F	Company	0.74%	1,043,639	$55,156,000	—	31 Dec 2020	13F
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	0.74%	1,040,186	$54,974,000	—	31 Dec 2020	13F
Trinity Street Asset Management LLP	13F	Company	0.67%	939,250	$49,639,000	—	31 Dec 2020	13F
GLENMEDE TRUST CO NA	13F	Company	0.64%	903,031	$47,724,000	—	31 Dec 2020	13F
SADOFF INVESTMENT MANAGEMENT LLC	13F	Company	0.6%	852,005	$45,028,000	—	31 Dec 2020	13F
D. E. Shaw & Co., Inc.	13F	Company	0.6%	851,446	$44,999,000	—	31 Dec 2020	13F
CREDIT SUISSE AG/	13F	Company	0.59%	828,168	$43,768,000	—	31 Dec 2020	13F
Holocene Advisors, LP	13F	Company	0.55%	771,181	$40,757,000	—	31 Dec 2020	13F
LAZARD ASSET MANAGEMENT LLC	13F	Company	0.51%	713,377	$37,701,000	—	31 Dec 2020	13F
NEW YORK STATE COMMON RETIREMENT FUND	13F	Company	0.46%	652,043	$34,460,000	—	31 Dec 2020	13F
GOLDMAN SACHS GROUP INC	13F	Company	0.45%	639,368	$33,791,000	—	31 Dec 2020	13F
Senvest Management, LLC	13F	Company	0.43%	608,972	$32,184,000	—	31 Dec 2020	13F
E. Ohman J:or Asset Management AB	13F	Company	0.43%	608,602	$32,164,616	—	31 Dec 2020	13F

Institutional Holders of CIENA CORP - Common Stock (CIEN) as of Q1 2021

As of 31 Mar 2021, CIENA CORP - Common Stock (CIEN) was held by 446 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 143,076,551 shares. The largest 10 holders included BlackRock Inc., VANGUARD GROUP INC, SPRING CREEK CAPITAL LLC, FMR LLC, STATE STREET CORP, CONGRESS ASSET MANAGEMENT CO /MA, UBS ASSET MANAGEMENT AMERICAS INC, WELLINGTON MANAGEMENT GROUP LLP, BNP PARIBAS ASSET MANAGEMENT Holding S.A., and BANK OF AMERICA CORP /DE/. This page lists 447 institutional shareholders reporting positions in this security for the Q1 2021 filing period.

Investor	Option	Weight %	Change %	Value $	* Price	Shares	Share Change	Activity	Report Period

Compare Q1 2021 vs Q4 2020 Across Filers

Q4 2020 holders

447

Q1 2021 holders

446

Holder diff

-1

Investor	Q4 2020 Shares	Q1 2021 Shares	Share Diff	Share Chg %	Q4 2020 Value $	Q1 2021 Value $	Value Diff $	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend

* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.