Rokos Capital Management (UK)’s Ciena CIEN Stock Holding History

Rokos Capital Management (UK)’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	$62.3M	Buy	127,045 +60,585	+91%	+$30.9M	0.23%	40
2026 Q1	$25.8M	Sell	66,460 -144,216	-68%	-$44.1M	0.2%	83
2025 Q4	$49.2M	Sell	210,676 -157,705	-43%	-$30.6M	0.19%	56
2025 Q3	$53.7M	Sell	368,381 -629,044	-63%	-$64.1M	0.23%	53
2025 Q2	$81.1M	Buy	997,425 +843,235	+547%	+$60.5M	0.35%	35
2025 Q1	$9.31M	Buy	+154,190	New	+$12.2M	0.1%	104
2024 Q4	–	Sell	-1,149,777	Closed	-$70.8M	–	121
2024 Q3	$70.8M	Sell	1,149,777 -887,346	-44%	-$46.8M	1.15%	23
2024 Q2	$98.1M	Buy	2,037,123 +512,791	+34%	+$24.3M	0.61%	22
2024 Q1	$75.4M	Buy	1,524,332 +827,352	+119%	+$43.6M	0.4%	28
2023 Q4	$31.4M	Hold	696,980	–	–	0.27%	36
2023 Q3	$33.4M	Sell	696,980 -568,501	-45%	-$25.1M	0.24%	46
2023 Q2	$53.8M	Buy	+1,265,481	New	+$57.6M	0.52%	29

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

Rokos Capital Management (UK)'s CIEN Position: Q2 2026 in Review

Rokos Capital Management (UK) increased its Ciena (CIEN) stake by 91% in Q2 2026, buying an estimated $30.9M and bringing the position to 127,045 shares worth $62.3M. The position accounts for 0.23% of the portfolio, ranked #40.

Rokos Capital Management (UK) first reported a position in CIEN in Q2 2023 and has held it in 12 quarters since. The position peaked at $98.1M in Q2 2024. 1,219 funds tracked by Wall St. Rank hold CIEN as of Q2 2026.

Rokos Capital Management (UK) held 127,045 shares of Ciena worth $62.3M as of Q2 2026.
Rokos Capital Management (UK) bought 60,585 Ciena shares in Q2 2026, an estimated $30.9M.
Ciena made up 0.23% of Rokos Capital Management (UK)'s portfolio in Q2 2026, its #40 holding.
Rokos Capital Management (UK) first reported a position in Ciena in Q2 2023 and has held it in 12 quarters since.
Rokos Capital Management (UK)'s Ciena position peaked at $98.1M in Q2 2024.
1,219 funds tracked by Wall St. Rank held Ciena as of Q2 2026.

Based on Rokos Capital Management (UK)'s 13F filing for Q2 2026, filed 14 Aug 2026.