A share repurchase and a reverse split are different transactions. In a share repurchase, the company simple buys existing shares in the open market. In a reverse split, the company, in a declaration says it now x amount of shares. For example, in a 10 for 1 reverse split, if the company had 10,000,000 shares outstanding before the declaration it now has 1,000,000 shares after the declaration. Your individual stock are worth more but the overall value of your holding will not change. If you had 10,000 shares worth $1 per share before the 10 for 1 reverse split, you now have 1,000 shares worth $10 per share for the same $10,000 value after the reverse split.
Hope this helps.
