Stock-TandemDecoder. HP/HPE Alumni

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Tandem Stock Decoder. (Related HPAA stock decoders: Compaq DEC HP )

(Updated Aug 14, 2025) Not officially endorsed or supported.

This page gives details for only one aspect of the many HP/HPE-related stocks. If you were ever an HP shareholder, you may now have shares of HPQ, HPE, Keysight, and/or Agilent – in different accounts. If ever an HPE shareholder, you may now have shares of DXC – and may not have received cash payouts for MFGP and PRSP. Only you – not the company, plan administrators, transfer agents, brokers, or the IRS – can reconstruct your full stock history. Transactions were often tracked and reported differently – or not at all.

When finished with this page, go to: HP/HPE-Related Stocks

If you ever worked for Tandem: Info for Tandem alumni

This topic was covered in the now-closed Tandem Alumni Forum (operated by former Tandem employees, not by the HPAA.)

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

Keep your postal address current on every financial account. And run an "unclaimed property" search every year. Employer does not update your address. Financial institutions are required to turn over inactive accounts to the state. Neither cashing dividend checks, receiving direct deposits, accessing accounts online, nor receiving statements prevents this – only a personally-initiated transaction, postal response, or call. Difficult to retrieve funds – and stock is sold. Easy to check: Unclaimed Property

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

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

Compare the date when you first acquired Tandem 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 our Compaq Stock Decoder.

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

Note: Due to the many complex HP-related stock events, only you – not the company, plan administrators, transfer agents, brokers, or the IRS – can reconstruct your full stock history. Transactions were often tracked and reported differently – or not at all. Retain your documents and tax calculations indefinitely. Admin and Broker Issues

The black entries in the table below are 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 1987.

The blue entries were developed from reports by members of the Tandem Alumni Forum and contemporaneous news stories. Given Tandem's high growth rate, there must have been earlier stock splits. (EDGAR, the SEC's searchable online database, includes SEC filings from some companies back to 1994 and from all companies only back to May 1996.)

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

Corporate Action Summary [Note: This is how broker Charles Schwab handled each event -- your broker may have handled some of them differently.]
Effective Date	Corp Action	Target Symbol	Target CUSIP	Target Security Name	Rate	Cash	New Symbol	New CUSIP	New Security Name
07/01/1980	Stock Split	TDM		TANDEM COMPUTERS INC	2:1
07/01/1981	Stock Split	TDM		TANDEM COMPUTERS INC	3:1
06/15/1987	Stock Split	TDM	875370108	TANDEM COMPUTERS INC	2:1
09/02/1997	Merger	TDM	875370108	TANDEM COMPUTERS INC	0.525		CPQ	204493100	COMPAQ COMPUTER CORP
01/21/1998	Stock Split	CPQ	204493100	COMPAQ COMPUTER CORP	2:1
05/06/2002	Merger	CPQ	204493100	COMPAQ COMPUTER CORP	0.6325		HWP	428236103	HEWLETT PACKARD CO
05/06/2002	Name/Symbol Change	HWP	428236103	HEWLETT PACKARD CO			HPQ	428236103	HEWLETT PACKARD CO
11/02/2015	Distrib/Spin-Off	HPQ	428236103	HEWLETT PACKARD CO	1		HPE	42824C109	HEWLETT PACKARD ENTERPRISE
11/02/2015	Exchange	HPQ	428236103	HEWLETT PACKARD CO	1		HPQ	40434L105	HPInc
04/03/2017	Distrib/Spin-Off	HPE	42824C109	HEWLETT PACKARD ENTERPRISE	0.0859		DXC	23355L106	DXC TECHNOLOGY CO
09/01/2017	Distrib/Spin-Off	HPE	42824C109	HEWLETT PACKARD ENTERPRISE	1		42824C992	42824C992	SEATTLE SPIN CO
09/01/2017	Merger	42824C992	42824C992	SEATTLE SPIN CO	0.1373		MFGP	594837304	MICRO FOCUS INTERNATIONAL P
06/01/2018	Distrib/Spin-Off	DXC	23355L106	DXC TECHNOLOGY CO	0.5		PRSP	715347100	PERSPECTA INC
04/30/2019	Reverse Stock Split	MFGP	594837304	MICRO FOCUS INTERNATIONAL P	185:223		MFGP	594837403	MICRO FOCUS INTERNATIONAL P

Question? Email us: info@hpalumni.org

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