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Ion Asset Management’s Ciena CIEN Stock Holding History

Ion 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
2025
Q3 		$30.9M Sell
211,924
-999,340
-83% -$102M 3.39% 13
2025
Q2 		$98.5M Sell
1,211,264
-145,488
-11% -$10.4M 5.42% 4
2025
Q1 		$82M Buy
1,356,752
+80,426
+6% +$6.36M 5.3% 4
2024
Q4 		$108M Sell
1,276,326
-130,953
-9% -$9.4M 6.3% 3
2024
Q3 		$86.7M Sell
1,407,279
-150,200
-10% -$7.91M 4.67% 5
2024
Q2 		$75M Sell
1,557,479
-316,300
-17% -$15M 4.19% 4
2024
Q1 		$92.7M Sell
1,873,779
-289,801
-13% -$15.3M 5.86% 4
2023
Q4 		$97.4M Buy
2,163,580
+195,580
+10% +$8.62M 6.47% 3
2023
Q3 		$93M Sell
1,968,000
-139,749
-7% -$6.16M 9.61% 2
2023
Q2 		$89.6M Buy
2,107,749
+307,749
+17% +$14M 10.46% 3
2023
Q1 		$94.5M Sell
1,800,000
-503,408
-22% -$25.1M 9.91% 4
2022
Q4 		$117M Sell
2,303,408
-482,662
-17% -$21.8M 15.89% 2
2022
Q3 		$113M Sell
2,786,070
-169,117
-6% -$8.13M 17.72% 2
2022
Q2 		$37.5M Sell
2,955,187
-16,428
-0.6% -$852K 5.6% 5
2022
Q1 		$59.2M Buy
2,971,615
+2,295,500
+340% +$150M 7.56% 4
2021
Q4 		$52M Sell
676,115
-1,404,694
-68% -$86.7M 6.61% 5
2021
Q3 		$77.8M Buy
2,080,809
+78,989
+4% +$4.39M 10.64% 3
2021
Q2 		$114M Buy
2,001,820
+379,394
+23% +$20.9M 13.99% 1
2021
Q1 		$88.8M Buy
1,622,426
+135,217
+9% +$7.28M 10.22% 3
2020
Q4 		$78.6M Sell
1,487,209
-1,064,712
-42% -$47.3M 8.98% 3
2020
Q3 		$101M Sell
2,551,921
-12,063
-0.5% -$635K 15.1% 2
2020
Q2 		$139M Sell
2,563,984
-61,540
-2% -$3.06M 23.26% 1
2020
Q1 		$105M Buy
2,625,524
+221,467
+9% +$9.09M 23.94% 1
2019
Q4 		$103M Sell
2,404,057
-39,737
-2% -$1.51M 19.12% 2
2019
Q3 		$95.9M Buy
2,443,794
+640,715
+36% +$26.9M 22.68% 2
2019
Q2 		$74.2M Buy
+1,803,079
New +$69.4M 18.86% 3

Other funds holding CIEN

Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Bank of America
Bank of America Charlotte, North Carolina $1.37T AUM 24.88% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
BNP Paribas Asset Management
BNP Paribas Asset Management Paris, France $86.1B AUM 29.11% 1-Year Est. Return
William Blair Investment Management
William Blair Investment Management Chicago, Illinois $30.3B AUM 33.75% 1-Year Est. Return

Ion Asset Management's CIEN Position: Q3 2025 in Review

Ion Asset Management reduced its Ciena (CIEN) stake by 83% in Q3 2025, selling an estimated $102M and leaving 211,924 shares worth $30.9M. The position accounts for 3.39% of the portfolio, ranked #13.

Ion Asset Management first reported a position in CIEN in Q2 2019 and has held it in 26 quarters since. The position peaked at $139M in Q2 2020. 688 funds tracked by Wall St. Rank hold CIEN as of Q3 2025.

  • Ion Asset Management held 211,924 shares of Ciena worth $30.9M as of Q3 2025.
  • Ion Asset Management sold 999,340 Ciena shares in Q3 2025, an estimated $102M.
  • Ciena made up 3.39% of Ion Asset Management's portfolio in Q3 2025, its #13 holding.
  • Ion Asset Management first reported a position in Ciena in Q2 2019 and has held it in 26 quarters since.
  • Ion Asset Management's Ciena position peaked at $139M in Q2 2020.
  • 688 funds tracked by Wall St. Rank held Ciena as of Q3 2025.

Based on Ion Asset Management's 13F filing for Q3 2025, filed 14 Nov 2025.