Company: ARMP
Filing Date: 2025-12-01
Form Type: 424B5
Source: 0001104659-25-117382
Chunk: 2

Company: Armata Pharmaceuticals, Inc.
Filing Date: 2025-12-01
Form: 424B5
Chunk 2
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                    | 18 |
| DESCRIPTION                               
 OF WARRANTS                               | 20 |
| DESCRIPTION                               
 OF UNITS                                  | 22 |
| LEGAL                                     
 OWNERSHIP OF SECURITIES                   | 23 |
| PLAN                                      
 OF DISTRIBUTION                           | 26 |
| LEGAL                                     
 MATTERS                                   | 28 |
| EXPERTS                                   | 29 |
| WHERE                                     
 YOU CAN FIND MORE INFORMATION             | 30 |
| INCORPORATION                             
 OF CERTAIN INFORMATION BY REFERENCE       | 31 |

<div align='center'>ABOUT THIS PROSPECTUS SUPPLEMENT</div>

This prospectus supplement and the accompanying
base prospectus are part of a registration statement that we filed with the U.S. Securities and Exchange Commission (the “SEC”)
utilizing a “shelf” registration process. Each time we conduct an offering to sell securities under the accompanying base
prospectus we will provide a prospectus supplement that will contain specific information about the terms of that offering, including
the price, the amount of securities being offered and the plan of distribution. This prospectus supplement describes the specific details
regarding this offering and may add, update or change information contained in the accompanying base prospectus. The accompanying base
prospectus, dated August 22, 2025, including the documents incorporated by reference therein, provides general information about us and
our securities, some of which, such as the section entitled “Plan of Distribution,” may not apply to this offering. This prospectus
supplement and the accompanying base prospectus are an offer to sell only the securities offered hereby, but only under circumstances
and in jurisdictions where it is lawful to do so. We are not, and Jones is not, making offers to sell or solicitations to buy our common
stock in any jurisdiction in which an offer or solicitation is not authorized or in which the person making that offer or solicitation
is not qualified to do so or to anyone to whom it is unlawful to make an offer or solicitation.

If information in this prospectus supplement is
inconsistent with the accompanying base prospectus or the information incorporated by reference with an earlier date, you should rely
on this prospectus supplement. This prospectus supplement, together with the base prospectus, the documents incorporated by reference
into this prospectus supplement and the accompanying base prospectus and any free writing prospectus we have provided for use in connection
with this offering, include all material information relating to this offering. We have not