1 As filed with the Securities and Exchange Commission on March 3, 1999 Registration No. 333-69033 ================================================================================ SECURITIES AND EXCHANGE COMMISSION POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-4 Registration Statement Under the Securities Act of 1933 MODTECH HOLDINGS, INC. (Exact name of registrant as specified in its charter) DELAWARE 33-0825386 (State of Incorporation) (I.R.S. Employer Identification No.) 2830 BARRETT AVENUE, PERRIS, CALIFORNIA 92571, (909) 943-4014 (Address, including zip code, and telephone number, including area code, of registrant's principal executive offices) EVAN M. GRUBER, CHIEF EXECUTIVE OFFICER 2830 BARRETT AVENUE, PERRIS, CALIFORNIA 92571, (909) 943-4014 (Name, address, including zip code, and telephone number, including area code, of agent for service of process) COPIES TO: Jon R. Haddan, Esq. Kevin A. Cudney, Esq. Haddan & Zepfel LLP Dorsey & Whitney LLP 4675 MacArthur Court, Suite 710 370 17th Street, Suite 4400 Newport Beach, California 92660 Denver, Colorado 80202 If the securities being registered on this Form are being offered in connection with the formation of a holding company and there is compliance with General Instruction G, check the following box. [ ] If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act of 1933, as amended (the "Securities Act"), check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. [ ] If this Form is a post-effective amendment filed pursuant to Rule 462(d) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. [ X ] ================================================================================ 2 SIGNATURES Pursuant to the requirements of the Securities Act of 1933, the Registrant has duly caused this Post-Effective Amendment to Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized in Newport Beach, California on March 3, 1999. MODTECH HOLDINGS, INC. By: /s/ Evan M. Gruber --------------------------------------- Evan M. Gruber, Chief Executive Officer Pursuant to the requirements of the Securities Act of 1933, this Post-Effective Amendment to Registration Statement has been signed by each of the following persons in the capacities and on the dates indicated. Signature Title Date --------- ----- ---- /s/Evan M. Gruber Chief Executive Officer March 3, 1999 - --------------------------- and Director Evan M. Gruber Chief Operating and Chief March 3, 1999 - --------------------------- Financial Officer (principal *Michael G. Rhodes financial and accounting officer) - --------------------------- President, Director March 3, 1999 *Patrick Van Den Bossche - --------------------------- Director March 3, 1999 *Charles A. Hamilton - --------------------------- Director March 3, 1999 *Charles R. Gwirtsman - --------------------------- Director March 3, 1999 *Charles C. McGettigan - --------------------------- Director March 3, 1999 *Myron A. Wick III - --------------------------- Director March 3, 1999 *Daniel J. Donahoe III - --------------------------- Director March 3, 1999 *Robert W. Campbell *By: Evan M. Gruber, Attorney in Fact /s/ Evan M. Gruber - ------------------------------------- Evan M. Gruber 3 EXHIBIT INDEX NUMBER NAME OF EXHIBIT - ------ --------------- 2+ Agreement and Plan of Reorganization and Merger, dated as of September 28, 1998, by and between Modtech, Inc. and SPI Holdings, Inc. (included as Annex I to the Joint Proxy Statement/Prospectus) 3.1+ Certificate of Incorporation of Modtech Holdings, Inc. 3.2+ Bylaws of Modtech Holdings, Inc. 3.3+ Articles of Incorporation of Modtech, Inc. 3.4+ Bylaws of Modtech, Inc. 3.5+ Articles of Incorporation of SPI Holdings, Inc. 3.6+ Bylaws of SPI Holdings, Inc. 3.7+ Certificate of Designation of Modtech Holdings, Inc. Series A Preferred Stock 3.8+ Designation of SPI Holdings, Inc. Series A-1, A-2, A-3, A-4, A-5 and A-6 Convertible Preferred Stock 4+ Registration Rights Agreement 5+ Opinion of Haddan & Zepfel LLP regarding the validity of securities offered hereby 8.1 Executed opinion of Gibson, Dunn & Crutcher LLP regarding certain tax matters, delivered at the closing. 8.2 Executed opinion of Dorsey & Whitney LLP regarding certain tax matters, delivered at the closing. 10.1+ Transaction Advisory Agreement 10.2+ Employment Agreement -- Evan M. Gruber 10.3+ Employment Agreement -- Patrick Van Den Bossche 10.4+ Employment Agreement -- Michael G. Rhodes 10.5+ Lease between Modtech, Inc. and Pacific Continental Modular Enterprises, relating to the Barrett Street property in Perris, California 10.6+ Lease between Modtech, Inc. and Gerald Bashaw, relating to the Morgan Street Property in Perris, California 10.7+ Lease between Modtech, Inc. and BMG2, relating to the property in Lathrop, California 10.8+ Industrial Development Bond agreements 10.9+ Lease between Office Master of Texas, Inc. and Bertrand L. Taylor, relating to the Gibbs Boulevard property in Glen Rose, Texas. 10.10+ Lease between Baron Homes, Inc. and David V. Homme and Mary B. Homme, relating to the South Cucamonga Avenue property in Rancho Cucamonga, California, assigned to SPI. 10.11+ Lease between Ronfran Incorporated d/b/a Standard Pacific Industries and Toth Enterprises, relating to the Hermosa Avenue property in Rancho Cucamonga, California, assigned to SPI. 1 4 10.12+ Lease between Arizona Millwork, Inc. and The Rosenfield Family Trust, relating to the Madison Avenue property in Phoenix, Arizona. 10.13+ Letter agreement dated June 10, 1998 between McGettigan, Wick & Co., Inc. and Modtech, Inc. 23.1+ Consent of KPMG LLP 23.2+ Consent of Arthur Andersen LLP 23.3+ Consent of Haddan & Zepfel LLP (included in Exhibit 5) 23.4+ Consent of Gibson, Dunn & Crutcher LLP (included in Exhibit 8.1) 23.5+ Consent of Dorsey & Whitney LLP (included in Exhibit 8.2) 24+ Powers of attorney (included on Page II-4 hereof) 27+ Financial Data Schedule 99.1+ Form of Modtech, Inc. proxy 99.2+ Form of SPI Holdings, Inc. proxy - --------------- + Previously filed. 2