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Diameter Capital Partners’s Ciena CIEN Stock Holding History

Diameter Capital 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
Q4 		– Sell
-62,000
Closed -$9.03M – 45
2025
Q3 		$9.03M Buy
+62,000
New +$6.31M 0.56% 29

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Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Arrowstreet Capital
Arrowstreet Capital Boston, Massachusetts $225B AUM 49.49% 1-Year Est. Return
Bank of America
Bank of America Charlotte, North Carolina $1.55T AUM 33.47% 1-Year Est. Return
BNP Paribas Asset Management
BNP Paribas Asset Management Paris, France $99.8B AUM 45.22% 1-Year Est. Return

Diameter Capital Partners's CIEN Position: Q4 2025 in Review

Diameter Capital Partners sold out of Ciena (CIEN) in Q4 2025, closing a stake of 62,000 shares — an estimated $9.03M sold.

Diameter Capital Partners first reported a position in CIEN in Q3 2025 and held it in 1 quarter. The position peaked at $9.03M in Q3 2025. 854 funds tracked by Wall St. Rank hold CIEN as of Q4 2025.

  • Diameter Capital Partners reported no remaining Ciena position as of Q4 2025 after selling out during the quarter.
  • Diameter Capital Partners sold 62,000 Ciena shares in Q4 2025, an estimated $9.03M.
  • Diameter Capital Partners first reported a position in Ciena in Q3 2025 and held it in 1 quarter.
  • Diameter Capital Partners's Ciena position peaked at $9.03M in Q3 2025.
  • 854 funds tracked by Wall St. Rank held Ciena as of Q4 2025.

Based on Diameter Capital Partners's 13F filing for Q4 2025, filed 17 Feb 2026.