13F-HR 1 sc13fhr.txt UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 13F FORM 13F COVER PAGE Report for the Calendar Year or Quarter Ended: December 31, 2009 Check here if Amendment [ ]; Amendment Number: This amendment (Check only one.): [ ] is a restatement. [ ] adds new holdings entries. Institutional Investment Manager Filing this Report: Name: Mesirow Advanced Strategies, Inc. Address: 353 North Clark Street Chicago, IL 60654 13 File Number: 28- The institutional investment manager filing this report and the person by whom it is signed hereby represent that the person signing the report is authorized to submit it, that all information contained herein is true, correct, and complete, and that it is understood that all required items, statements, schedules, lists, and tables, are considered integral parts of this form. Person Signing this Report on Behalf of Reporting Manager: Name: Gregory J. Robbins Title: Managing Director, General Counsel Phone: (312) 595-7955

Report Type (Check only one.): [ X ] 13F HOLDINGS REPORT. [ ] 13F NOTICE. [ ] 13F COMBINATION REPORT. FORM 13F SUMMARY PAGE Report Summary: Number of Other Included Managers: 2 Form 13F Information Table Entry Total: 277 Data Records Form 13F Information Table Value Total: $157132.578 List of Other Included Managers: No. Form 13F File Number Name 1 28-11218 Ascend Capital Limited Partnership 2. 28-05388 Bryn Mawr Capital Management, Inc.

Mesirow Advanced Strategies, Inc. 13F-HR