If you have paper stock certificates. What to do: Stock Certificates

Check state unclaimed property sites for lost shares, uncashed stock-buyout or dividend checks, and other stray money.  How to check for lost stock, dividends, and other unclaimed property

To be sure, also check for unclaimed stock or dividends in the original state of incorporation: Massachusetts State Treasurer

Compaq acquisition of DEC: For each share of DEC owned on June 11, 1998, DEC shareholders received $30.00 in cash and  0.945 share of Compaq stock. DEC stock was retired.

HP's purchase of Compaq was closed on May 3, 2002. Compaq shareholders received 0.6325 share of HPQ in exchange for each CPQ share -- 18% over market price. CPQ stock was retired. HWP stock symbol changed to HPQ.

HP Inc. is the overall legal successor to companies acquired by Compaq.  Stockholder information and contact instructions: HPInc Investor Relations Site https://investor.hp.com/resources/contact-ir/default.aspx (scroll down)

Compare the date when you first acquired DEC stock with the dates in the left-hand column. If you later acquired Compaq shares while a Compaq employee, those batches of stock should be tracked separately -- see HPAA's Complete Stock Decoder Table for: Compaq  

For links and more detail on HP stock history, see HPAA's Complete Stock DecoderTable

This table is from the online system available to customers of one broker, Charles Schwab & Co. The HPAA member who contributed this table did not hold this stock before 1976.

Notes: Members have found that plan administrators, transfer agents, and brokerages vary significantly in how (or if) they track gain/loss and cost basis for the many complex HP-related stock events -- and what (if anything) they report to the IRS. Issues with major brokers

Stock splits or other corporate actions may have taken place before the first date in this table.

This table only covers stock HP/HPE events through 04/30/2019. See HP Stock Decoder for subsequent HP/HPE-related stock events.