CHARLES SCHWAB INVESTMENT MANAGEMENT INC

Position in CIEN — Ciena Corp

CIK 884546 SAN FRANCISCO, CA

Position in CIEN

as of Mar 31, 2026 · filed May 15, 2026 Compact

Position Value

$493,928,723

+$275,090,016 QoQ

Shares Held

1,272,258

+36.0% QoQ

Ownership

0.899%

of shares outstanding

% of Portfolio

0.09%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

25 quarters on record

Voting authority Sole 99.99646298156506.ToString("F0")% Shared 0.ToString("F0")% None 0.0035370184349400834.ToString("F0")%

Technology · as of Mar 31, 2026

CHARLES SCHWAB INVESTMENT MANAGEMENT INC holds $5,381,079,203 across 27 Communication Equipment names. CIEN ranks #4 (9.2% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	CSCO	Cisco Systems, Inc.	33,989,713	$2,637,261,831
2	LITE	Lumentum Holdings Inc.	974,034	$684,512,133
3	MSI	Motorola Solutions, Inc.	1,442,192	$625,868,061
4	CIEN	Ciena Corp This page	1,272,258	$493,928,723
5	HPE	Hewlett Packard Enterprise Co	10,514,571	$250,351,935
6	ASTS	AST SpaceMobile, Inc.	1,554,983	$128,861,441
7	VIAV	Viavi Solutions Inc.	2,951,372	$98,221,660
8	VSAT	Viasat Inc	2,117,498	$96,981,408

25 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$493,928,723	1,272,258	+36.0%	Shares	Sole	2026-05-15
2025-12-31	$218,838,707	935,728	-0.6%	Shares	Sole	2026-02-13
2025-09-30	$137,188,364	941,775	-1.5%	Shares	Sole	2025-11-10
2025-06-30	$77,799,708	956,593	+0.4%	Shares	Sole	2025-08-12
2025-03-31	$57,578,006	952,805	-0.7%	Shares	Sole	2025-09-15
2024-12-31	$81,403,267	959,831	+0.5%	Shares	Sole	2025-02-06
2024-09-30	$58,850,230	955,516	+0.7%	Shares	Sole	2024-11-12
2024-06-30	$45,718,531	948,911	+0.9%	Shares	Sole	2024-08-12
2024-03-31	$46,508,862	940,523	-0.9%	Shares	Sole	2024-05-09
2023-12-31	$42,735,914	949,476	+2.0%	Shares	Sole	2024-02-06
2023-09-30	$43,980,912	930,616	-5.0%	Shares	Sole	2023-11-08
2023-06-30	$41,628,005	979,713	+0.9%	Shares	Sole	2023-08-10
2023-03-31	$51,008,054	971,212	+1.6%	Shares	Sole	2023-05-12
2022-12-31	$48,720,209	955,673	+3.9%	Shares	Sole	2023-02-13
2022-09-30	$37,194,023	919,961	+1.0%	Shares	Sole	2022-11-14
2022-06-30	$41,630,277	910,947	+0.1%	Shares	Sole	2022-08-15
2022-03-31	$55,166,266	909,884	-17.8%	Shares	Sole	2022-05-13
2021-12-31	$85,202,403	1,106,956	+3.4%	Shares	Sole	2022-02-11
2021-09-30	$54,953,280	1,070,171	+6.8%	Shares	Sole	2021-11-16
2021-06-30	$57,003,495	1,001,995	+2.0%	Shares	Sole	2021-08-16
2021-03-31	$53,748,884	982,253	-5.6%	Shares	Sole	2021-05-17
2020-12-31	$54,973,830	1,040,186	+1.9%	Shares	Sole	2021-02-16
2020-09-30	$40,528,252	1,021,120	-37.4%	Shares	Sole	2020-11-13
2020-06-30	$88,380,833	1,631,847	+17.1%	Shares	Sole	2020-08-20
2020-03-31	$55,491,557	1,393,910	—	Shares	Sole	2020-05-15
No filing history on record for this holder in this stock.