Assenagon Asset Management’s Ciena CIEN Stock Holding History

Assenagon 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	$105M	Sell	214,002 -150,545	-41%	-$76.8M	0.13%	128
2026 Q1	$142M	Sell	364,547 -149,695	-29%	-$45.8M	0.21%	79
2025 Q4	$120M	Sell	514,242 -508,915	-50%	-$98.7M	0.17%	105
2025 Q3	$149M	Buy	1,023,157 +235,891	+30%	+$24M	0.2%	93
2025 Q2	$64M	Buy	787,266 +747,576	+1,884%	+$53.6M	0.1%	182
2025 Q1	$2.4M	Buy	+39,690	New	+$3.14M	﹤0.01%	704
2024 Q4	–	Sell	-98,695	Closed	-$6.08M	–	1349
2024 Q3	$6.08M	Sell	98,695 -127,407	-56%	-$6.71M	0.01%	660
2024 Q2	$10.9M	Sell	226,102 -385,362	-63%	-$18.3M	0.02%	416
2024 Q1	$30.2M	Buy	611,464 +73,505	+14%	+$3.88M	0.07%	215
2023 Q4	$24.2M	Sell	537,959 -58,079	-10%	-$2.56M	0.06%	253
2023 Q3	$28.2M	Buy	596,038 +476,102	+397%	+$21M	0.09%	194
2023 Q2	$5.1M	Sell	119,936 -217,120	-64%	-$9.89M	0.02%	493
2023 Q1	$17.7M	Buy	337,056 +178,882	+113%	+$8.93M	0.06%	264
2022 Q4	$8.06M	Buy	158,174 +105,454	+200%	+$4.77M	0.03%	424
2022 Q3	$2.13M	Sell	52,720 -22,630	-30%	-$1.09M	0.01%	690
2022 Q2	$3.44M	Sell	75,350 -262,107	-78%	-$13.6M	0.01%	657
2022 Q1	$20.5M	Buy	337,457 +277,822	+466%	+$18.2M	0.06%	242
2021 Q4	$4.59M	Sell	59,635 -20,120	-25%	-$1.24M	0.01%	540
2021 Q3	$4.09M	Sell	79,755 -221,241	-74%	-$12.3M	0.01%	490
2021 Q2	$17.1M	Buy	300,996 +150,945	+101%	+$8.32M	0.06%	247
2021 Q1	$8.21M	Buy	150,051 +123,760	+471%	+$6.66M	0.03%	381
2020 Q4	$1.39M	Buy	26,291 +6,515	+33%	+$289K	0.01%	628
2020 Q3	$785K	Buy	19,776 +1,351	+7%	+$71.1K	﹤0.01%	906
2020 Q2	$998K	Buy	+18,425	New	+$916K	0.01%	791
2020 Q1	–	Sell	-212,750	Closed	-$9.08M	–	815
2019 Q4	$9.08M	Buy	+212,750	New	+$8.11M	0.06%	193
2019 Q2	–	Sell	-35,849	Closed	-$1.34M	–	1019
2019 Q1	$1.34M	Sell	35,849 -50,460	-58%	-$1.96M	0.01%	616
2018 Q4	$2.93M	Sell	86,309 -118,214	-58%	-$3.75M	0.03%	348
2018 Q3	$6.39M	Buy	+204,523	New	+$5.73M	0.06%	256

Other funds holding CIEN

Wealth Enhancement Advisory Services Plymouth, Minnesota $59.8B AUM 29.42% 1-Year Est. Return

AHT

Amanah Holdings Trust London $1.7B AUM 612.53% 1-Year Est. Return

Swedbank Stockholm, Sweden $116B AUM 46.87% 1-Year Est. Return

VNIM

Vaughan Nelson Investment Management Houston, Texas $11.3B AUM 53% 1-Year Est. Return

Handelsbanken Fonder Stockholm, Sweden $35.1B AUM 47.76% 1-Year Est. Return

MLCM

M & L Capital Management London, United Kingdom $370M AUM 165.61% 1-Year Est. Return

CNB

Czech National Bank Prague, Czech Republic $18.3B AUM 43.04% 1-Year Est. Return

HCA

Harbour Capital Advisors Tysons Corner, Virginia $549M AUM 54.99% 1-Year Est. Return

UNICOM Systems Las Vegas, Nevada $1.53B AUM 148.94% 1-Year Est. Return

COPPSERS

Commonwealth of Pennsylvania Public School Employees Retirement System Harrisburg, Pennsylvania $20.6B AUM 37.37% 1-Year Est. Return

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

Assenagon Asset Management reduced its Ciena (CIEN) stake by 41% in Q2 2026, selling an estimated $76.8M and leaving 214,002 shares worth $105M. The position accounts for 0.13% of the portfolio, ranked #128.

Assenagon Asset Management first reported a position in CIEN in Q3 2018 and has held it in 28 quarters since. The position peaked at $149M in Q3 2025. 151 funds tracked by Wall St. Rank hold CIEN as of Q2 2026.

Assenagon Asset Management held 214,002 shares of Ciena worth $105M as of Q2 2026.
Assenagon Asset Management sold 150,545 Ciena shares in Q2 2026, an estimated $76.8M.
Ciena made up 0.13% of Assenagon Asset Management's portfolio in Q2 2026, its #128 holding.
Assenagon Asset Management first reported a position in Ciena in Q3 2018 and has held it in 28 quarters since.
Assenagon Asset Management's Ciena position peaked at $149M in Q3 2025.
151 funds tracked by Wall St. Rank held Ciena as of Q2 2026.

Based on Assenagon Asset Management's 13F filing for Q2 2026, filed 8 Jul 2026.