1. IBM Investor Relations
May 2008
Stock Splits
Record date Payment date Stock dividend or split Adjusted old shares Cost basis new shares
5/10/99 5/26/99 2 for 1 Stock Split 50% 50%
5/9/97 5/27/97 2 for 1 Stock Split 50% 50%
5/10/79 5/31/79 4 for 1 Stock Split 25% 75%
5/10/73 5/29/73 25% Stock Split 80% 20%
5/9/68 5/24/68 2 for 1 Stock Split 50% 50%
5/4/67 6/10/67 2.5% Stock Dividend 97.56% 2.44%
5/3/66 5/18/66 50% Stock Split 66.67% 33.33%
5/5/64 5/18/64 25% Stock Split 80% 20%
5/5/61 5/16/61 50% Stock Split 66.67% 33.33%
5/5/59 5/18/59 50% Stock Split 66.67% 33.33%
1/6/59 1/28/59 2.5% Stock Dividend 97.56% 2.44%
1/6/58 1/28/58 2.5% Stock Dividend 97.56% 2.44%
5/7/57 5/13/57 2 for 1 Stock Split 50% 50%
5/4/56 5/15/56 25% Stock Split 80% 20%
1/4/56 1/27/56 2.5% Stock Dividend 97.56% 2.44%
5/7/54 5/10/54 25% Stock Split 80% 20%
1/4/54 1/28/54 2.5% Stock Dividend 97.56% 2.44%
1/5/53 1/29/53 5% Stock Dividend 95.24% 4.76%
1/4/52 1/28/52 5% Stock Dividend 95.24% 4.76%
1/4/51 1/26/51 5% Stock Dividend 95.24% 4.76%
1/5/50 1/25/50 5% Stock Dividend 95.24% 4.76%
1/7/49 1/28/49 5% Stock Dividend 95.24% 4.76%
1/23/48 2/6/48 75% Stock Split 57.14% 42.86%
1/16/46 1/28/46 25% Stock Split 80% 20%
1/15/45 1/29/45 5% Stock Dividend 95.24% 4.76%
1/14/44 1/28/44 5% Stock Dividend 95.24% 4.76%
1/14/43 1/28/43 5% Stock Dividend 95.24% 4.76%
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2. IBM Investor Relations
May 2008
Stock Splits
Record date Payment date Stock dividend or split Adjusted old shares Cost basis new shares
1/14/42 1/28/42 5% Stock Dividend 95.24% 4.76%
1/15/41 1/30/41 5% Stock Dividend 95.24% 4.76%
3/15/40 4/1/40 5% Stock Dividend 95.24% 4.76%
3/15/39 4/1/39 5% Stock Dividend 95.24% 4.76%
3/15/38 4/1/38 5% Stock Dividend 95.24% 4.76%
3/15/37 4/1/37 5% Stock Dividend 95.24% 4.76%
12/20/35 2/10/36 3% Stock Dividend 97.09% 2.91%
12/22/34 12/20/35 2% Stock Dividend 98.04% 1.96%
12/21/31 1/11/32 5% Stock Dividend 95.24% 4.76%
12/20/30 1/10/31 5% Stock Dividend 95.24% 4.76%
12/21/29 1/10/30 5% Stock Dividend 95.24% 4.76%
12/20/28 12/28/28 5% Stock Dividend 95.24% 4.76%
2/16/26 2/27/26 3 for 1 Stock Split 33.33% 66.67%
12/1/25 12/15/25 20% Stock Dividend 83.33% 16.67%
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