Ostrum Asset Management’s Ciena CIEN Stock Holding History

Ostrum Asset Management’s Portfolio CIEN Stock Details CIEN Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$2.69M	Sell	5,478 -376	-6%	-$192K	0.13%	122
2026 Q1	$2.27M	Buy	5,854 +3,173	+118%	+$970K	0.13%	123
2025 Q4	$627K	Sell	2,681 -2,369	-47%	-$460K	0.03%	351
2025 Q3	$736K	Sell	5,050 -5,040	-50%	-$513K	0.03%	359
2025 Q2	$821K	Buy	+10,090	New	+$724K	0.04%	338

Other funds holding CIEN

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return

Bank of America Charlotte, North Carolina $1.55T AUM 33.47% 1-Year Est. Return

Ostrum Asset Management's CIEN Position: Q2 2026 in Review

Ostrum Asset Management reduced its Ciena (CIEN) stake by 6.4% in Q2 2026, selling an estimated $192K and leaving 5,478 shares worth $2.69M. The position accounts for 0.13% of the portfolio, ranked #122.

Ostrum Asset Management first reported a position in CIEN in Q2 2025 and has held it in 5 quarters since. 1,224 funds tracked by Wall St. Rank hold CIEN as of Q2 2026.

Ostrum Asset Management held 5,478 shares of Ciena worth $2.69M as of Q2 2026.
Ostrum Asset Management sold 376 Ciena shares in Q2 2026, an estimated $192K.
Ciena made up 0.13% of Ostrum Asset Management's portfolio in Q2 2026, its #122 holding.
Ostrum Asset Management first reported a position in Ciena in Q2 2025 and has held it in 5 quarters since.
1,224 funds tracked by Wall St. Rank held Ciena as of Q2 2026.

Based on Ostrum Asset Management's 13F filing for Q2 2026, filed 13 Aug 2026.