| GM | Link | Type | Amount |
| October 1950 | – | stock split | 2 shares for 1 |
| September 1955 | – | stock split | 3 shares for 1 |
| December 1984 |  Tax Basis Info (HTML) |
stock dividend | 1 share of GM Class E for each 20 of GM $1-2/3 |
| December 1985 | Tax Basis Info (HTML) |
stock dividend | 1 share of GM Class H for each 20 of GM $1-2/3 |
| March 1989 | – | stock split | 2 shares for 1 |
| December 1997 | Tax Basis Info (HTML) |
Hughes Transactions1 | 0.06377 shares of Raytheon Class A (RTN/A) for each GM $1-2/3 |
| May 1999 | Tax Basis Info (HTML) |
Delphi spin-off | 0.69893 shares of Delphi common stock (DPH) for each GM $1-2/3 |
| May 2000 |  Tax Basis Info (PDF) |
Hughes Exchange | 1.065 shares of GM Class H for each GM $1-2/3 |
| GM Class E | Link | Type | Amount |
| June 1985 | – | stock split | 2 shares for 1 |
| March 1990 | – | stock split | 2 shares for 1 |
| March 1992 | – | stock split | 2 shares for 1 |
| June 1996 | – | EDS split-off2 | 1 share of EDS common stock (EDS) for 1 GM Class E |
| GM Class H | Link | Type | Amount |
| March 1988 | – | stock split | 2 shares for 1 |
| December 1997 | Tax Basis Info (HTML) |
Hughes Transactions1 | 0.5624 shares of Raytheon Class A (RTN/A) for each GM Class H |
| June 2000 | – | stock split | 3 shares for 1 |
| December 2003 | Tax Basis Info (PDF) |
Hughes Transactions3 | As a result of the Hughes Transactions, GM's former Class H stockholders received 0.8232 shares of Hughes common stock (HS) and 0.0921 News Corporation Preferred ADSs for each share of GM Class H |
1Includes the spin-off and merger of Hughes Electronics' defense electronics unit with Raytheon Company, the transfer of Delco Electronics to GM's Delphi Automotive, and the recapitalization of GM Class H common stock into a new class of GM common stock.
2GM Class E Common Stock was exchanged for EDS common stock in conjunction with the split-off of EDS completed on June 7, 1996.
3"Hughes Transactions" On December 22, 2003, GM simultaneously (i) sold 19.8 percent of the Hughes common stock to the News Corporation Ltd ("News Corp") and (ii) exchanged all of the remaining 80.2 percent of the Hughes common stock it held for all of the outstanding shares of GM Class H common stock. Immediately thereafter, the former holders of the GM Class H common stock exchanged 14.2 percent of the outstanding Hughes common stock for News Corp Preferred American Depositary Shares ("Preferred ADSs").
