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Form SC 13G/A - Statement of Beneficial Ownership by Certain Investors: [Amend]
SEC Accession No. 0001086364-12-002895
Filing Date
2012-09-10
Accepted
2012-09-10 09:27:29
Documents
1

Document Format Files

Seq Description Document Type Size
1 ciena.corp..txt SC 13G/A 11497
  Complete submission text file 0001086364-12-002895.txt   13175
Mailing Address 7035 RIDGE ROAD HANOVER MD 21076
Business Address 7035 RIDGE ROAD HANOVER MD 21076 4108658500
CIENA CORP (Subject) CIK: 0000936395 (see all company filings)

IRS No.: 232725311 | State of Incorp.: DE | Fiscal Year End: 1031
Type: SC 13G/A | Act: 34 | File No.: 005-54195 | Film No.: 121081717
SIC: 3661 Telephone & Telegraph Apparatus

Mailing Address 55 EAST 52ND STREET NEW YORK NY 10055
Business Address 55 EAST 52ND STREET NEW YORK NY 10055 212-810-5300
BlackRock Inc. (Filed by) CIK: 0001364742 (see all company filings)

IRS No.: 320174431 | State of Incorp.: DE | Fiscal Year End: 0226
Type: SC 13G/A
SIC: 6211 Security Brokers, Dealers & Flotation Companies