12th Street Asset Management Company’s Ciena CIEN Stock Holding History

12th Street Asset Management Company’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	$22.9M	Sell	46,777 -16,710	-26%	-$8.52M	3.27%	14
2026 Q1	$24.6M	Sell	63,487 -116,097	-65%	-$35.5M	4.03%	11
2025 Q4	$42M	Sell	179,584 -5,368	-3%	-$1.04M	6.92%	2
2025 Q3	$26.9M	Sell	184,952 -193,156	-51%	-$19.7M	4.56%	9
2025 Q2	$30.8M	Buy	378,108 +68,553	+22%	+$4.92M	5.29%	8
2025 Q1	$18.7M	Buy	309,555 +422	+0.1%	+$33.4K	3.19%	13
2024 Q4	$26.2M	Buy	309,133 +69,876	+29%	+$5.01M	4.32%	10
2024 Q3	$14.7M	Buy	+239,257	New	+$12.6M	2.49%	19

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

12th Street Asset Management Company's CIEN Position: Q2 2026 in Review

12th Street Asset Management Company reduced its Ciena (CIEN) stake by 26% in Q2 2026, selling an estimated $8.52M and leaving 46,777 shares worth $22.9M. The position accounts for 3.27% of the portfolio, ranked #14.

12th Street Asset Management Company first reported a position in CIEN in Q3 2024 and has held it in 8 quarters since. The position peaked at $42M in Q4 2025. 1,224 funds tracked by Wall St. Rank hold CIEN as of Q2 2026.

12th Street Asset Management Company held 46,777 shares of Ciena worth $22.9M as of Q2 2026.
12th Street Asset Management Company sold 16,710 Ciena shares in Q2 2026, an estimated $8.52M.
Ciena made up 3.27% of 12th Street Asset Management Company's portfolio in Q2 2026, its #14 holding.
12th Street Asset Management Company first reported a position in Ciena in Q3 2024 and has held it in 8 quarters since.
12th Street Asset Management Company's Ciena position peaked at $42M in Q4 2025.
1,224 funds tracked by Wall St. Rank held Ciena as of Q2 2026.

Based on 12th Street Asset Management Company's 13F filing for Q2 2026, filed 13 Aug 2026.