What companies in the US offer domestic partner benefits?

Too many to list, but here are just some of the better known companies:

1. 3M Co.
2. Abercrombie & Fitch Co.
3. Aetna, Inc.
4. AIG
5. Alcoa, Inc.
6. AMC Entertainment, Inc.
7. American Express Co.
8. Ameriprise Financial, Inc.
9. American Airlines (a/k/a AMR Corp.)
10. Apple, Inc.
11. AT&T, Inc.
12. Automatic Data Processing (ADP), Inc.
13. Avon Products, Inc.
14. Bank of America Corp.
15. Bank of New York Mellon Corp.
16. Barclays
17. Barnes & Noble, Inc.
18. Best Buy Co., Inc.
19. Bristol-Myers Squibb Co.
20. Caesars Entertainment Corp. (Las Vegas)
21. Capital One Financial Corp.
22. Charles Schwab Corp.
23. Chevron Corp.
24. Chrysler Group, LLC
25. Chubb Corp.
26. CIGNA Corp.
27. Cisco Systems, Inc.
28. Clorox Co.
29. Coca-Cola Co.
30. Comcast Corp.
31. Corning, Inc.
32. Credit Suisse USA, Inc.
33. DELL, Inc.
34. Deutsche Bank (NY, NY)
35. Dow Chemical Co.
36. Eastman Kodak Co.
37. eBay, Inc.
38. Electronic Arts, Inc.
39. Eli Lilly & Co.
40. Federal Home Loan Mortgage Corp. (Freddie Mac)
41. Ford Motor Co.
42. GameStop Corp.
43. Gap, Inc.
44. Gementech, Inc.
45. General Mills, Inc.
46. General Motors Co.
47. GlaxoSmithKline, LLC
48. Goldman Sachs Group, Inc.
49. google, Inc.
50. Group Health Cooperative
51. Hartford Financial Services Group, Inc.
52. Hewlett-Packard Co.
53. HSBC - North America
54. Hyatt Hotels Corp.
55. ING North American Insurance Corp.
56. International Business Machines Corp. (IBM)
57. Intuit, Inc.
58. Johnson & Johnson
59. JPMorgan Chase & Co.
60. Kaiser Permanente
61. Kellog Co.
62. Kraft Foods, Inc.
63. Levi Strauss & Co.
64. Lexmark International Inc.
65. Lockheed Martin Corp.
66. MasterCard, Inc.
67. Medtronic, Inc.
68. Merck & Co., Inc.
69. MetLife, Inc.
70. MGM Resorts International
71. Microsoft Corp.
72. Monsanto Co.
73. Moody's Corp.
74. Morgan Stanley
75. Nationwide
76. Nike, Inc.
77. Nokia Corp.
78. Nordstrom, Inc.
79. Novartis Pharmaceuticals Corp.
80. Office Depot, Inc.
81. Oracle Corp.
82. Orbitz Worldwide, Inc.
83. Owens Corning
84. PepsiCo, Inc.
85. Pfizer, Inc.
86. PG&E Corp.
87. PricewaterhouseCoopers, LLP
88. Prudential Financial, Inc.
89. Raytheon Co.
90. Razorfish
91. S.C. Johnson & Son, Inc.
92. Sears Holding Corp.
93. Sodexo, Inc.
94. Sony Pictures Entertainment, Inc.
95. Sprint Nextel Corp.
96. Staples, Inc.
97. Starwood Hotels & Resorts Worlwide
98. Symantec Corp.
99. Target Corp.
100. TD Bank, N.A.
101. Thomson Reuters
102. Time Warner, Inc.
103. Toyota Financial Services
104. Toyota Motor Sales USA, Inc.
105. Unilever
106. United Airlines
107. Verizon Communications, Inc.
108. Volkswagen Group of America, Inc.
109. Walgreen Co.
110. Walt Disney Co.
111. Wells Fargo & Co.
112. Wyndham Worldwide Corp.
113. Xerox Corp.
114. Yahoo! Inc.

Note that in states where same-sex marriage has been legalized, ALL employers must provide benefits to same-sex spouses equal to those of opposite-sex spouses. This is a different issue than domestic partner benefits.