Ciena (CIEN) Ownership - Who Owns Ciena?

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Ciena (CIEN) Ownership Overview

1.14% Insiders

32.61% Mutual Funds

3.11% Other Institutional Investors

28.77% ETFs

34.37% Public Companies and Individual Investors

The ownership structure of Ciena (CIEN) stock is a mix of institutional, retail, and individual investors. Approximately 64.49% of the company’s stock is owned by Institutional Investors, 1.14% is owned by Insiders, and 34.37% is owned by Public Companies and Individual Investors.

The ownership structure of Ciena (CIEN) stock is a mix of institutional, retail, and individual investors. Approximately 35.72% of the company’s stock is owned by Institutional Investors, 1.14% is owned by Insiders, and 28.77% is owned by Public Companies and Individual Investors.

Recent Insider Trading Activity

Date	Name	Activity	Value
Dec 17, 2025	Thomas Michael Nevens	xxxxxxxxxxxxx	$1921742
Sep 26, 2025	Bruce L. Claflin	xxxxxxxxxxxxx	$1185555

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Recent Hedge Fund Trading Activity

Date	Firm	Activity	Value
Dec 31, 2023	Bridgewater Associates, Lp	xxxxxxxxxxxxx	$49730818
Dec 31, 2023	Diamond Hill Capital Management Inc	xxxxxxxxxxxxx	$42699283
Dec 31, 2023	First Eagle Investment Management Llc	xxxxxxxxxxxxx	$9565283
Dec 31, 2023	Primecap Management Co	xxxxxxxxxxxxx	$119647892

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Top Shareholders

Holder	# of Shares	Type	% Holding	Value
	15,785,223	Institution	11.16%	9,104,758,774
	12,777,754	Institution	9.04%	7,370,080,730
	10,961,124	Institution	7.75%	6,322,266,712
	10,532,843	Institution	7.45%	6,075,238,514
	3,874,932	Institution	2.74%	2,235,022,028
	3,458,293	Institution	2.45%	1,994,708,819
	3,153,946	Institution	2.23%	1,819,164,513
Steve Mandel	2,006,662	Institution	1.42%	1,157,422,575
	1,958,016	Institution	1.38%	1,129,364,049
	1,740,050	Institution	1.23%	1,003,643,439

Top Mutual Fund Holders

# of Shares	Type	% Holding	Value
10,961,124	Institution	7.75%	6,322,266,712
10,532,843	Institution	7.45%	6,075,238,514
3,458,293	Institution	2.45%	1,994,708,819
3,153,946	Institution	2.23%	1,819,164,513
1,740,050	Institution	1.23%	1,003,643,439
1,450,022	Institution	1.03%	836,358,189
942,194	Institution	0.67%	543,448,077
892,142	Institution	0.63%	514,578,584
865,919	Institution	0.61%	499,453,420
780,881	Institution	0.55%	450,404,352

Top ETF Holders

Holder	# of Shares	Type	% Holding	Value
iShares S&P Mid-Cap ETF CDI	4,610,230	Institution	3.26%	224,933,122
Vanguard Total Stock Market ETF	4,490,542	Institution	3.18%	1,743,363,121
Vanguard S&P 500 ETF	3,586,272	Institution	2.54%	1,392,298,379
iShares Core S&P 500 ETF	1,822,295	Institution	1.29%	981,324,080
SPDR S&P 500 ETF Trust	1,673,240	Institution	1.18%	911,497,490
Vanguard Small-Cap ETF	1,633,117	Institution	1.15%	634,025,013
Vanguard Mid-Cap ETF	1,527,986	Institution	1.08%	593,210,005
Vanguard Information Technology ETF	1,198,282	Institution	0.85%	465,209,021
Technology Select Sector SPDR Fund	1,083,464	Institution	0.77%	590,217,014
Vanguard Growth ETF	930,667	Institution	0.66%	361,312,849

FAQ

Who Owns Ciena (CIEN)?

According to the latest TipRanks data, approximately 3.11% of the company's stock is held by institutional investors, 1.14% is held by insiders, and 34.37% is held by retail investors.

What percentage of Ciena (CIEN) stock is held by institutional investors?

According to the latest TipRanks data, approximately 3.11% of Ciena (CIEN) stock is held by institutional investors.

What percentage of Ciena (CIEN) stock is held by retail investors?

According to the latest TipRanks data, approximately 34.37% of Ciena (CIEN) stock is held by retail investors.

Who owns the most shares of Ciena (CIEN)?

Vanguard owns the most shares of Ciena (CIEN).

What is the significance of the ownership structure for a publicly traded company?

The ownership structure can impact the company's decision making, as large institutional investors may exert influence on the company's management and can also affect the company's stock price with their buying and selling patterns.