库存股（Treasury stock）指的是公司将自己已经发行的股票重新买回，存放于公司，而尚未注销或重新售出。这样做可以减少市场上所有已发行股票的总数。在公司的资产负债表上，库存股不能列为公司资产，而是以负数形式列为一项股东权益。库存股的回购往往作为对股东的回报，但比直接发放红利更省税。它是指已经认购缴款，由发行公司通过购入、赠予或其他方式重新获得，可供再行出售或注销之用的股票。这种股票既不分配股利，又不附投票权，一般只限于优先股，并且必须存入公司的金库。

Treasury stock, also known as treasury shares or reacquired stock, refers to previously outstanding stock that is bought back from stockholders by the issuing company. The result is that the total number of outstanding shares on the open market decreases. These shares are issued but no longer outstanding and are not included in the distribution of dividends or the calculation of earnings per share (EPS). 以下为相关例句，供参考：

例句1

The firms can logout the shares or hold them as the treasury stock after repurchase. But these shares can't participate in calculation return per share and distribution proceeds.

公司在股票回购完成后可以将所回购的股票注销，也可以将回购的股份作为“库存股”保留，但不参与每股收益的计算和收益分配。

例句2

Treasury stock may be purchased for a variety of reasons, including to reissue them to officers and employees in profit sharing schemes or stock-option plans.

库存股的购买可能有各种各样的原因，其中包括按照利润分配方案或购股权计划重新发行给高级职员和雇员。

相关知识拓展：按照通常的财务理论，库存股亦称库藏股，是指由公司购回而没有注销、并由该公司持有的已发行股份。库存股在回购后并不注销，而由公司自己持有，在适当的时机再向市场出售或用于对员工的激励。简单的说，就是公司将已经发行出去的股票，从市场中买回，存放于公司，而尚未再出售或是注销。它的特性和未发行的股票类似，没有投票权或是分配股利的权利，而公司解散时也不能变现。