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Ardsley Advisory Partners’s Ciena CIEN Stock Holding History

Ardsley Advisory Partners’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
Q2 		– Sell
-15,000
Closed -$906K – 168
2025
Q1 		$906K Buy
+15,000
New +$1.19M 0.17% 111
2024
Q1 		– Sell
-10,000
Closed -$450K – 137
2023
Q4 		$450K Buy
+10,000
New +$441K 0.07% 118

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

Ardsley Advisory Partners's CIEN Position: Q3 2025 in Review

Ardsley Advisory Partners sold out of Ciena (CIEN) in Q3 2025, closing a stake of 110,000 shares — an estimated $8.95M sold.

Ardsley Advisory Partners first reported a position in CIEN in Q2 2013 and held it in 11 quarters. The position peaked at $8.95M in Q2 2025. 688 funds tracked by Wall St. Rank hold CIEN as of Q3 2025.

  • Ardsley Advisory Partners reported no remaining Ciena position as of Q3 2025 after selling out during the quarter.
  • Ardsley Advisory Partners sold 110,000 Ciena shares in Q3 2025, an estimated $8.95M.
  • Ardsley Advisory Partners first reported a position in Ciena in Q2 2013 and held it in 11 quarters.
  • Ardsley Advisory Partners's Ciena position peaked at $8.95M in Q2 2025.
  • 688 funds tracked by Wall St. Rank held Ciena as of Q3 2025.

Based on Ardsley Advisory Partners's 13F filing for Q3 2025, filed 14 Nov 2025.