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CIEN · Ciena Corp · Fails to Deliver

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$341.95 -2.25 (-0.65%) At close · Oct 20
S&P 500 member Russell 1000 member Rebalance outlook locked
Market Cap
$48.49B
Shares
141.81M
Volume · Oct 20 1.95M Avg daily vol (3M) 2.55M

Fails to deliver — shares from a trade that were not delivered to the buyer by the settlement date — published by the SEC twice a month. Persistent fails can reflect settlement problems or naked short selling.

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1M 3M 6M 1Y 5Y All

Fails to Deliver History

Settlement Date Quantity Price Value
2026-09-15 901 $319.64 $287,996
2026-09-10 1,210 $338.00 $408,980
2026-09-08 39,058 $321.00 $12,537,618
2026-09-04 5,416 $317.46 $1,719,363
2026-09-03 6,491 $354.16 $2,298,853
2026-09-02 10,216 $360.33 $3,681,131
2026-08-21 487 $392.48 $191,138
2026-08-10 4 $412.39 $1,650
2026-08-07 2,070 $403.76 $835,783
2026-08-06 75 $408.83 $30,662
2026-08-03 1,200 $377.05 $452,460
2026-07-21 418 $378.77 $158,326
Showing 1–12 of 12 settlements
Key facts CIK 936395 CUSIP 171779309 13F (30d) 156 filings 151 filers Visit website Investor relations