Company: ARMP
Filing Date: 2025-12-01
Form Type: 424B5
Source: 0001104659-25-117382
Chunk: 70

Company: Armata Pharmaceuticals, Inc.
Filing Date: 2025-12-01
Form: 424B5
Chunk 70
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 to be incorporated by reference in this prospectus and
to be part hereof from the date of filing of such documents; provided, however, that documents or information deemed to have been
furnished and not filed in accordance with SEC rules shall not be deemed incorporated by reference into this prospectus.

Any statement contained herein
or in a document, all or a portion of which is incorporated or deemed to be incorporated by reference herein, shall be deemed to be modified
or superseded for purposes of this prospectus to the extent that a statement contained herein or in any other subsequently filed document
which also is or is deemed to be incorporated by reference herein modifies or supersedes such statement. Any such statement so modified
or superseded shall not be deemed, except as so modified or amended, to constitute a part of this prospectus.

We will furnish without charge
to you, on written or oral request, a copy of any or all of the documents incorporated by reference, including exhibits to these documents.
You should direct any requests for documents by writing us at 5005 McConnell Avenue, Los Angeles, California 90066, Attention: SVP Finance,
or telephoning us at (310) 665-2928.

The SEC maintains a website
that contains reports, proxy and information statements, and other information regarding issuers that file electronically with the SEC
(http://www.sec.gov). In addition, we maintain a website at www.armatapharma.com/. Information contained in our website does not
constitute a part of this prospectus.

<div align='center'>31

Up to $100,000,000 of Shares of Common Stock

PROSPECTUS SUPPLEMENT

The date of this prospectus supplement is December 1, 2025.</div>