Skip to main content

MASSACHUSETTS FINANCIAL SERVICES CO /MA/

Position in CIEN — Ciena Corp

CIK 912938 Boston, MA

Position in CIEN

as of Jun 30, 2026 · filed Aug 3, 2026
Position Value
$314,458,769
+$88,249,575 QoQ
Shares Held
641,020
+10.0% QoQ
Ownership
0.452%
of shares outstanding
% of Portfolio
0.11%
of 13F equity value
Holder Rank
#31
of 1,227 holders
Holding Since
Sep 2020
7 quarters on record
Voting authority Sole 78% Shared 17% None 5%

Common Shares in CIEN Over Time

Shares Held

Position Value (USD)

Position in Communication Equipment

Technology · as of Jun 30, 2026

MASSACHUSETTS FINANCIAL SERVICES CO /MA/ holds $946,765,539 across 10 Communication Equipment names. CIEN ranks #1 (33.2% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 CIEN
Ciena Corp
This page
641,020 $314,458,769

All Filings in CIEN

Export CSV
7 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $314,458,769 641,020
2026-03-31 $226,209,194 582,668
2025-12-31 $142,050,529 607,391
2025-09-30 $23,543,474 161,622
2021-03-31 $609,580 11,140
2020-12-31 $1,352,008 25,582
2020-09-30 $1,277,025 32,175