13F-HR 1 d74304_13fhr.txt HOLDINGS REPORT UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 13F Report for the Calendar Year or Quarter Ended: March 31, 2008 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: Nierenberg Investment Management Company, Inc. Address: 19605 NE 8th Street Camas, WA 98607 13F File Number: 028-10859 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: David Nierenberg Title: President Phone: 360-604-8600 Signature, Place, and Date of Signing: DAVID NIERENBERG Camas, WA, May 15, 2008 -------------------------------------------------------------------------------- Report Type (Check only one.): |X| 13F HOLDINGS REPORT. (Check here if all holdings of this reporting manager are reported in this report.) |_| 13F NOTICE. (Check here if no holdings reported are in this report, and all holdings are reported by other reporting manager(s).) |_| 13F COMBINATION REPORT. (Check here if a portion of the holdings for This reporting manager are reported in this report and a portion are reported by other reporting manager(s). Report Summary: Number of Other Included Managers: -1- Form 13F Information Table Entry Total: 13 Form 13F Information Table Value Total: $599,426 (thousands) List of Other Included Managers: 1 - Nierenberg Investment Management Offshore, Inc. Form 13F Information Table

COLUMN 1 COLUMN 2 COLUMN 3 COLUMN 4 COLUMN 5 COLUMN 6 COLUMN 7 COLUMN 8 Voting Authority Title of Value SHS OR PUT/ Invest. Other Name of Issuer Class Cusip (x$1000) PRN AMT SH/PRN CALL Disc.(1) Managers Sole Shared None ASSET ACCEPTANCE CAPITAL CORP Common 04543P100 29,355 3,048,303 SH defined 1 2,496,506 551,797 BROOKS AUTOMATION INC Common 114340102 50,838 5,230,258 SH defined 1 4,142,140 1,088,118 ELECTRO SCIENTIFIC INDS INC Common 285229100 62,786 3,809,827 SH defined 1 2,995,413 814,414 MEDCATH CORPORATION Common 58404W109 53,408 2,934,511 SH defined 1 2,376,345 558,166 METALLIC VENTURES GOLD INC Common 591253109 18,365 9,447,861 SH defined 1 7,335,886 2,111,975 METALLIC VENTURES GOLD-WTS Common 591253109 39 371,700 SH defined 1 353,980 17,720 MEXICAN RESTAURANTS INC Common 59283R104 6,859 1,192,956 SH defined 1 922,965 269,991 MOVE, INC Common 62458M108 41,540 13,487,083 SH defined 1 11,008,143 2,478,940 NATCO GROUP INC. Common 63227W203 59,388 1,270,338 SH defined 1 991,543 278,795 NATUS MEDICAL INC Common 639050103 75,955 4,184,845 SH defined 1 3,227,217 957,628 RADISYS CORP Common 750459109 44,569 4,417,163 SH defined 1 3,615,987 801,176 REDWOOD TRUST INC Common 758075402 68,753 1,891,425 SH defined 1 1,583,036 308,389 SUPERIOR ENERGY SERVICES INC Common 868157108 87,568 2,210,209 SH defined 1 1,807,868 402,341

(1) Nierenberg Investment Management Company, Inc. shares investment discretion with Nierenberg Investment Management Offshore, Inc. only with respect to those shares with which it shares voting authority, as set forth in Column 8.