Transaction Details

Footnotes

Pursuant to the Issuer's previously announced stock buyback program, the Issuer entered into a Share Repurchase Agreement with PJAM IBP Holdings, Inc. ("PJAM") for the purchase of 150,000 shares of its common stock in a privately-negotiated transaction for an aggregate purchase price of $37,643,760. The repurchase was approved by the company's board of directors and is exempt from Section 16(b) by the virtue of Rule 16b-3(e). | These securities are held directly by PJAM. The Reporting Persons, other than PJAM, disclaim beneficial ownership in the reported securities except to the extent of his or its pecuniary interest therein. IBP Holding Company is the sole shareholder of PJAM. | These securities are held directly by Installed Building Systems, Inc. The Reporting Persons, other than Installed Building Systems, Inc., disclaim beneficial ownership in the reported securities except to the extent of his or its pecuniary interest therein. | These securities are held by a trust for the benefit of one of Mr. Edwards' children. The Reporting Persons disclaim beneficial ownership of the reported securities except to the extent of his or its pecuniary interest therein.