Following is a list of 28 sustaining members as provided by the Board of Trustees in June 2006.

ISM Sustaining Members:

 

1. American Embassy
2. American Chamber of Commerce of the Phils.
3. American President Lines
4. Asian Development Bank
5. A. Soriano Corporation
6. ATR Kim Eng Financial Corporation
7. Bank of America NT & SA
8. Bank of the Philippine Islands
9. Caltex (Philippines) Inc.
10. C.F. Sharp Group of Companies
11. Citibank NA
12. Colgate-Palmolive Philippines, Inc.
13. Everett Steamship Corporation
14. Exxon Mobil Philippines, Inc.
15. General Electric (Phils.) Inc.
16. Goodyear Tire & Rubber Co. of the Phils., Ltd.
17. Jardine Davies Transport Services, Inc.
18. Kodak Philippines, Ltd.
19. Mantrade Development Corporation
20. NCR Corporation (Philippines)
21. Philam Insurance Co., Inc.
22. Pilipinas Shell Petroleum Corporation
23. Procter & Gamble Philippines
24. San Miguel Corporation
25. Sime Darby Philippines, Inc.
26. Singer Philippines, Inc.
27. William J. Shaw Foundation, Inc.
28. Unilever Philippines