(Updated May 4, 2020 -- 3AM.)  Questions or comments to: info@hpalumni.org  

There are four dates associated with any stock event. The announcement date. The Record Date, specified in the announcement, the date used to determine the number of shares or amount of cash each shareholder receives. The next stock market business day is the Effective Date. The Distribution Date, usually weeks later, is the actual distribution of the additional shares or cash. This table is sorted by Effective Date.

Compare the date when you first acquired Compaq stock with the dates in Column 1. If you acquired DEC or Tandem stock before those companies were bought by Compaq, those batches of stock should be tracked separately -- see our DEC Stock Decoder or Tandem Stock Decoder.

For links and more detail on HP stock history, see our HP Stock Decoder

Note: Stock plan administrators and stock brokerages vary in how they make such calculations and in what they report to the IRS. Each of the 236 NYSE member firms (and others around the world) is expected to read SEC filings, analyze corporate actions, and update the records they maintain on behalf of their clients.

The table below is from the online system available to customers of broker Charles Schwab & Co.

The same four splits are listed in the last pre-merger copy of Compaq's Investor Relations website in the Internet Archive. "Compaq stock has split four times since it began trading in 1983."