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Form SC 13G/A - Statement of Beneficial Ownership by Certain Investors: [Amend]
SEC Accession No. 0001086364-13-003482
Filing Date
2013-02-08
Accepted
2013-02-07 18:52:30
Documents
1

Document Format Files

Seq Description Document Type Size
1 tetra.tech.inc..txt SC 13G/A 11372
  Complete submission text file 0001086364-13-003482.txt   13079
Mailing Address 3475 EAST FOOTHILL BOULEVARD PASADENA CA 91107
Business Address 3475 EAST FOOTHILL BOULEVARD PASADENA CA 91107 6263514664
TETRA TECH INC (Subject) CIK: 0000831641 (see all company filings)

IRS No.: 954148514 | State of Incorp.: DE | Fiscal Year End: 0928
Type: SC 13G/A | Act: 34 | File No.: 005-43035 | Film No.: 13584179
SIC: 8711 Services-Engineering Services

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