LOOMIS SAYLES & CO L P

Position in CIEN — Ciena Corp

CIK 312348 BOSTON, MA

Position in CIEN

as of Mar 31, 2026 · filed May 14, 2026 Compact

Position Value

$35,450,445

+$1,309,636 QoQ

Shares Held

91,313

-37.4% QoQ

Ownership

0.065%

of shares outstanding

% of Portfolio

0.05%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

23 quarters on record

Voting authority Sole 97.97181124264891.ToString("F0")% Shared 0.ToString("F0")% None 2.028188757351089.ToString("F0")%

Technology · as of Mar 31, 2026

LOOMIS SAYLES & CO L P holds $115,935,146 across 4 Communication Equipment names. CIEN ranks #3 (30.6% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	EXTR	Extreme Networks Inc	2,715,683	$40,952,499
2	VIAV	Viavi Solutions Inc.	1,176,860	$39,165,900
3	CIEN	Ciena Corp This page	91,313	$35,450,445
4	CSCO	Cisco Systems, Inc.	4,721	$366,302

23 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$35,450,445	91,313	-37.4%	Shares	Defined	2026-05-14
2025-12-31	$34,140,809	145,982	-53.1%	Shares	Defined	2026-02-12
2025-09-30	$45,354,790	311,353	-12.9%	Shares	Defined	2025-11-13
2025-06-30	$29,071,245	357,448	-15.1%	Shares	Defined	2025-08-13
2025-03-31	$25,435,046	420,901	-2.2%	Shares	Defined	2025-05-14
2024-12-31	$36,511,552	430,510	-3.0%	Shares	Defined	2025-02-12
2024-09-30	$27,341,463	443,927	-2.3%	Shares	Defined	2024-11-13
2024-06-30	$21,881,042	454,152	-26.9%	Shares	Defined	2024-08-13
2024-03-31	$30,725,756	621,350	-3.9%	Shares	Defined	2024-05-14
2023-12-31	$29,104,680	646,627	+5.2%	Shares	Defined	2024-02-13
2023-09-30	$29,053,509	614,759	-11.7%	Shares	Defined	2023-11-09
2023-06-30	$29,587,698	696,345	-3.3%	Shares	Defined	2023-08-11
2023-03-31	$37,832,203	720,339	-0.4%	Shares	Defined	2023-05-15
2022-12-31	$36,857,928	722,988	+7.8%	Shares	Defined	2023-02-10
2022-09-30	$27,127,922	670,985	-1.0%	Shares	Defined	2022-11-14
2022-06-30	$30,977,927	677,854	-0.7%	Shares	Defined	2022-08-05
2022-03-31	$41,396,587	682,774	+3.3%	Shares	Defined	2022-05-13
2021-12-31	$50,891,639	661,188	+14.6%	Shares	Defined	2022-02-14
2021-09-30	$29,626,843	576,959	+13.3%	Shares	Defined	2021-11-12
2021-06-30	$28,981,927	509,438	+62.9%	Shares	Defined	2021-08-13
2020-09-30	$12,414,555	312,788	-42.7%	Shares	Defined	2020-11-12
2020-06-30	$29,581,487	546,187	+8.6%	Shares	Defined	2020-08-14
2020-03-31	$20,014,557	502,752	—	Shares	Defined	2020-05-15
No filing history on record for this holder in this stock.