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 January 9, 2026

Shawn Matthews
Chief Executive Officer
HCM IV Acquisition Corp.
100 First Stamford Place, Suite 330
Stamford, CT 06902

 Re: HCM IV Acquisition Corp.
 Registration Statement on Form S-1
 Filed November 7, 2025
 Amendment No. 1 Registration Statement on Form S-1
 Filed November 25, 2025
 File No. 333-291343
Dear Shawn Matthews:

 We have conducted a limited review of your registration statement and
have the
following comment.

 Please respond to this letter by amending your registration statement
and providing
the requested information. If you do not believe a comment applies to your
facts and
circumstances or do not believe an amendment is appropriate, please tell us why
in your
response.

 After reviewing any amendment to your registration statement and the
information
you provide in response to this letter, we may have additional comments.

Amendment No. 1 Registration Statement on Form S-1 filed November 25, 2025
Summary, page 1

1. On page 8 where you discuss your sponsor and your officers and directors
sponsoring
 or forming other special purpose acquisition companies, please expand to
disclose the
 conflicts of interest relating to the involvement of Messrs. Matthews,
Bischoff, and
 Donohoe with HCM III Acquisition Corp. and HCM III's current searching
for a
 target business to complete its initial business combination. Please
also expand to
 address how business combination opportunities are allocated among
SPACs. In this
 regard, we note your statement on page 8 and elsewhere that your
officers and
 directors intend to first present to you any potential business
combination
 January 9, 2026
Page 2

 opportunities suitable for a SPAC prior to any similar entity. Refer to
Item 1602(b)(7)
 of Regulation S-K.
 We remind you that the company and its management are responsible for
the accuracy
and adequacy of their disclosures, notwithstanding any review, comments, action
or absence
of action by the staff.

 Refer to Rules 460 and 461 regarding requests for acceleration. Please
allow adequate
time for us to review any amendment prior to the requested effective date of
the registration
statement.

 Please contact Kellie Kim at 202-551-3129 or Shannon Menjivar at
202-551-3856 if
you have questions regarding comments on the financial statements and related
matters.
Please contact Benjamin Holt at 202-551-6614 or Pam Howell at 202-551-3357 with
any
other questions.

 Sincerely,

 Division of
Corporation Finance
 Office of Real
Estate & Construction
cc: Kevin E. Manz
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