Filed by Duke Energy Corporation
                          Pursuant to Rule 425 under the Securities Act of 1933
                                       And Deemed Filed Pursuant to Rule 14a-12
                                      Under the Securities Exchange Act of 1934

                                     Subject Company: Duke Energy Holding Corp.
                                                 Commission File No. 333-126318

Cinergy Merger: Aug. 5 Q&A for Duke Energy Employees

What is the biggest merger obstacle? Is it the fact that Duke Energy is not
joining an RTO?

We don't see any major obstacles. The combination of Cinergy with Duke Energy
will yield benefits for our shareholders, our customers and the energy markets
as a whole. We believe this merger clearly meets the standards for determining
whether a merger is consistent with the public interest at both the state and
federal level.

When and how could the City of Cincinnati intervene in the merger?

No approval is required from the City, but it has the right to intervene at the
state and federal level. Greg Ficke, President of CG&E, has met with the City
administration about the merger and those conversations will continue.

Following shareholder approval of the merger this fall, will the integration
process speed up, including the 1,500 workforce reductions?

Integration planning is meant to be a thorough process spanning several months
and we still believe the merger will close sometime in the first half of 2006.
Shareholder approval is one of several steps needed prior to closing. There are
also a number of regulatory reviews and approvals that are needed.

Does the merger agreement preclude the companies from selling or acquiring
assets?

The companies will continue normal business operations during the transition,
including acquiring assets, as Cinergy did with the Wheatland power plant
following the merger. It's the same for divesting of assets, as outlined in the
merger agreement.

Will New Source Review lawsuits have any impact on completing the merger?

Both companies are involved in litigation under New Source Review, and the
cases are proceeding. The litigation was reviewed in the due diligence process
prior to the merger announcement and is not expected to have an impact on
completing the merger.

Duke changed the terms served by its board of directors from three years to one
year. Will that continue following the merger?

Yes, the merger agreement calls for the new Duke Energy board of directors to
be elected annually.

Is the Duke workforce comparable to Cinergy in diversity?

Yes. Duke Energy's workforce demographics are similar to Cinergy with some
differences; Duke Energy has approximately 3,100 Canadian and 900 South
American employees.

Maintaining a diverse and inclusive environment is called out in Duke Energy's
charter and is put into practice through the work of Duke Energy's Diversity
Council, which is sponsored by the Chief Operating Officer and Chief
Development Officer. Duke Energy's Diversity and Employee Development
organization reports to the Chief Development Officer and is responsible for
helping the organization implement initiatives directed by the Diversity
Council.

Duke Energy's workforce challenges are similar to other companies and are
related, in part, to an increasingly higher percentage of "baby boomers"
becoming eligible to retire. With that in mind, Duke Energy's leadership team
is focused on succession planning and talent development.

How deep in the organization will the Transition Team go for employees to serve
on integration teams?

A process is being developed by the Integration Team that will consider many
factors in staffing the teams. For additional information about that team, see
the companies' announcement on Aug. 1.
 
Duke seems to have a good job in deploying mobile computing; putting SmallWorld
and MapFrame in the field for their crews. Will the Cinergy operations be
getting that as a result of the merger?

That's a good example of a best practice using technology that may become part
of the entire combined company. Such considerations and deployments will be
part of the integration process.

Is it true that the DENA assets (Midwest power plants) will be put in CG&E's
rate base?

The merger agreement provides that Duke and Cinergy will use their reasonable
best efforts to transfer certain DENA assets from Duke to CG&E. This transfer
will require regulatory approval by the FERC and the SEC under PUHCA*, and
there can be no guarantee that such approval will be obtained or will be
obtained on terms or with conditions acceptable to the companies. Since Ohio
has gone through electric restructuring, the rate base associated with CG&E's
generation has been eliminated and our Ohio generation is now unregulated.
Consequently, the DENA assets, if transferred to CG&E, would remain in the
nonregulated portfolio.

*NOTE: The U.S. Energy Policy Act of 2005, passed by Congress on July 29,
repeals the Public Utility Holding Company Act (PUHCA). The repeal will be
effective six months after the bill is signed into law. The President is
expected to sign it on Aug. 8.

I recently saw a cable TV ad running in the Charlotte area on Cinergy Health.
It is related to Cincinnati-based Cinergy?

The two companies are not related. Cinergy Health, Inc., based in Miami,
provides non-insurance, health care savings programs.

What are the jurisdictions in which Cinergy does business - both regulated and
unregulated? Cinergy's regulated service area spans 25,000 square miles and
includes all or portions of 69 counties in Indiana, all or portions of ten
Southwestern Ohio counties, including the City of Cincinnati and suburbs, and
all or portions of six Northern Kentucky counties. Cinergy's unregulated
operations include commercial power operations with headquarters in Cincinnati,
commercial gas operations headquartered in Houston and Cinergy Solutions, the
company's on-site energy solutions and utility services subsidiary with
customers in 28 U.S. states and Canada.

The Sec. 203 application filed with the FERC states that as part of the merger
Duke will transfer to Cinergy either DENA's facilities in the Midwest or all of
DENA. The application goes on to say that it is more likely that DENA will be
entirely transferred to Cinergy. Does this mean that management of all of
DENA's generation assets and trading/marketing operations will be moved to
Cincinnati?

While there is discussion in the filing about the transfer of DENA's Midwest
assets to Cinergy, this is about the structuring of certain legal entities upon
closing of the transaction. Once this is completed, we can then have a platform
from which we can determine operational efficiencies and synergies which are at
the heart of this agreement. As far as where the management of these assets
would be located, as well as the location of trading and marketing operations,
that has not yet been decided.

When will pension and benefit issues be decided?

All benefits and benefits issues will be addressed during the integration
process.

                                     * * *

                           Forward-Looking Statements

         This document includes statements that do not directly or exclusively
relate to historical facts. Such statements are "forward-looking statements"
within the meaning of Section 27A of the Securities Act of 1933 and Section 21E
of the Securities Exchange Act of 1934. These forward-looking statements
include statements regarding benefits of the proposed mergers and restructuring
transactions, integration plans and expected synergies, anticipated future
financial operating performance and results, including estimates of growth.
These statements are based on the current expectations of management of Duke
and Cinergy. There are a number of risks and uncertainties that could cause
actual results to differ materially from the forward-looking statements
included in this document. For example, (1) the companies may be unable to
obtain shareholder approvals required for the transaction; (2) the companies
may be unable to obtain regulatory approvals required for the transaction, or
required regulatory approvals may delay the transaction or result in the
imposition of conditions that could have a material adverse effect on the
combined company or cause the companies to abandon the transaction; (3)
conditions to the closing of the transaction may not be satisfied; (4) problems
may arise in successfully integrating the businesses of the companies, which
may result in the combined company not operating as effectively and efficiently
as expected; (5) the combined company may be unable to achieve cost-cutting
synergies or it may take longer than expected to achieve those synergies; (6)
the transaction may involve unexpected costs or unexpected liabilities, or the
effects of purchase accounting may be different from the companies'
expectations; (7) the credit ratings of the combined company or its
subsidiaries may be different from what the companies expect; (8) the
businesses of the companies may suffer as a result of uncertainty surrounding
the transaction; (9) the industry may be subject to future regulatory or
legislative actions that could adversely affect the companies; and (10) the
companies may be adversely affected by other economic, business, and/or
competitive factors. Additional factors that may affect the future results of
Duke and Cinergy are set forth in their respective filings with the Securities
and Exchange Commission ("SEC"), which are available at
www.duke-energy.com/investors and www.cinergy.com/investors, respectively. Duke
and Cinergy undertake no obligation to publicly update or revise any
forward-looking statements, whether as a result of new information, future
events or otherwise.

                  Additional Information and Where to Find It

         In connection with the proposed transaction, a registration statement
of Duke Energy Holding Corp. (Registration No. 333-126318), which includes a
preliminary joint proxy statement of Duke and Cinergy, and other materials have
been filed with the SEC and are publicly available. WE URGE INVESTORS TO READ
THE DEFINITIVE JOINT PROXY STATEMENT-PROSPECTUS WHEN IT BECOMES AVAILABLE AND
THESE OTHER MATERIALS CAREFULLY BECAUSE THEY CONTAIN IMPORTANT INFORMATION
ABOUT DUKE, CINERGY, DUKE ENERGY HOLDING CORP., AND THE PROPOSED TRANSACTION.
Investors will be able to obtain free copies of the joint proxy
statement-prospectus as well as other filed documents containing information
about Duke and Cinergy at http://www.sec.gov, the SEC's website. Free copies of
Duke's SEC filings are also available on Duke's website at
www.duke-energy.com/investors, and free copies of Cinergy's SEC filings are
also available on Cinergy's website at www.cinergy.com/investors.

                        Participants in the Solicitation

         Duke, Cinergy and their respective executive officers and directors
may be deemed, under SEC rules, to be participants in the solicitation of
proxies from Duke's or Cinergy's stockholders with respect to the proposed
transaction. Information regarding the officers and directors of Duke is
included in its definitive proxy statement for its 2005 Annual Meeting filed
with the SEC on March 31, 2005. Information regarding the officers and
directors of Cinergy is included in its definitive proxy statement for its 2005
Annual Meeting filed with the SEC on March 28, 2005. More detailed information
regarding the identity of potential participants, and their direct or indirect
interests, by securities, holdings or otherwise, will be set forth in the
registration statement and proxy statement and other materials to be filed with
the SEC in connection with the proposed transaction.