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Filing Detail
Form SC 13G - Statement of acquisition of beneficial ownership by individuals:
SEC Accession No. 0001140361-10-004304
Filing Date
2010-02-05
Accepted
2010-02-05 10:29:46
Documents
1

Document Format Files

Seq Description Document Type Size
1 WILLIAM BLAIR & COMPANY SC 13G 12-31-2009 formsc13g.htm SC 13G 86068
  Complete submission text file 0001140361-10-004304.txt   87982
Mailing Address 26651 WEST AGOURA ROAD CALABASAS CA 91302
Business Address 26651 WEST AGOURA ROAD CALABASAS CA 91302 8188787900
ON ASSIGNMENT INC (Subject) CIK: 0000890564 (see all company filings)

IRS No.: 954023433 | State of Incorp.: DE | Fiscal Year End: 1231
Type: SC 13G | Act: 34 | File No.: 005-43232 | Film No.: 10575930
SIC: 7363 Services-Help Supply Services

Mailing Address 222 WEST ADAMS CHICAGO IL 60606
Business Address 222 WEST ADAMS ST 34TH FLOOR CHICAGO IL 60606-5312 3122361600
BLAIR WILLIAM & CO/IL (Filed by) CIK: 0000902367 (see all company filings)

IRS No.: 362214610 | State of Incorp.: IL | Fiscal Year End: 1231
Type: SC 13G
SIC: 0000