| 1957 |
Harry Silverstein and his son, Larry Silverstein, buy their first property, a Manhattan industrial loft building on East 23rd Street. |
| 1978 |
SPI's portfolio contains four million square feet of commercial space, including 521, 529, 530, 689, and 711 Fifth Avenue, 44 Wall Street, and a shopping center in Stamford, Connecticut. |
| 1980 |
Completes a $25 million renovation of the 33-story office building at 11 West 42nd Street, in collaboration with Tishman Speyer Properties, including installation of a co-generation system, the first ever in a Manhattan office tower. |
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Acquires 120 Wall Street and 120 Broadway and remodel them extensively. |
| 1984 |
Acquires the full block site on far West 42nd Street, later to be developed into residential towers. |
| 1986 |
Completes the 47-story Seven World Trade Center. |
| 1989 |
Controls 13 buildings with ten million square feet of space. |
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Completes A&S Plaza on 33rd Street. |
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Develops 43-story Embassy Suites hotel in Times Square. |
| 1991 |
Sets aside 20 stories of the 34-floor office building at 120 Wall Street as tax-free headquarters for nonprofit groups that might otherwise leave the city. |
| 1998 |
Completes development of the Ronald Reagan Building in Washington, DC, the largest privately developed office building in the US. |
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Acquires the 52-story office building at 140 Broadway for $191 million. |
| 2000 |
Completes River Place I, the first tower of the 42nd Street residential project. |
| 2001 |
Completes the largest real estate transaction in New York history by acquiring the World Trade Center for $3.2 billion, only to have it destroyed six weeks later in the terrorist attacks of 9/11. |
| 2002 |
Construction begins on 7 World Trade Center. |
| 2003 |
Selects David Childs to design the Freedom Tower, the tallest of the five new WTC office towers. |
| 2006 |
Opens 7 World Trade Center, the first LEED-certified office building in NYC. |
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Begins construction on the Freedom Tower. |
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Establishes joint venture partnership with CalSTRS to develop and acquire up to $2 billion in NYC. |
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Reaches agreement on final rebuilding plan for the WTC with Port Authority, NYS, NYC and LMDC. |
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Unveils designs for WTC Towers 2, 3 and 4. |
| 2007 |
Begins construction on Silver Towers. |
| 2008 |
Announces the partnership with Four Seasons to develop Downtown's first five-star hotel. |
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Begins construction on WTC Towers, Tower 3 (175 Greenwich Street) and Tower 4 (150 Greenwich Street) and Four Seasons Hotel and Residences Downtown. |