Indicate by check mark whether the registrant files or will file
annual reports under cover Form 20-F or Form 40-F.
Form 20-F ☒ Form 40-F ☐
Pursuant to the requirements of the Securities
Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.
EXHIBIT 99.1

DEFSEC Technologies Inc. Announces Closing of
CDN$5.54 Million Private Placement
OTTAWA, ON, Aug. 18, 2026 /CNW/ -- DEFSEC Technologies
Inc. (TSXV: DFSC) (TSXV: DFSC.WT.U) (NASDAQ: DFSC) (NASDAQ: DFSCW) ("DEFSEC" or the "Company") today
announced the closing of its previously announced private placement (the "Offering") for the issuance and sale of 1,951,219
common shares in the capital of the Company, no par value per share (each a "Common Share") (or pre-funded warrants (each
a "Pre-funded Warrant") in lieu thereof), at a purchase price of CAD$2.84 (US$2.05) per Common Share (or Pre-funded Warrant
in lieu thereof) and Common Share purchase warrants to purchase up to an aggregate of 1,951,219 Common Shares (each a "Common
Warrant"). Each Common Warrant is immediately exercisable to acquire one Common Share at an exercise price of CDN$3.30
per Common Share for a period of 60 months following the closing of the Offering. Each Pre-funded Warrant is immediately exercisable to
acquire one Common Share at a nominal exercise price of CDN$0.001 per Common Share.
H.C. Wainwright & Co. acted as
the exclusive placement agent for the Offering.
The aggregate gross proceeds from the Offering were
approximately CDN$5.54 million (approximately US$4.0 million), before deducting placement agent fees and other offering expenses. DEFSEC
intends to use the aggregate net proceeds of the Offering for business and market development, intellectual property protection and registrations
and general working capital purposes.
As compensation for services rendered, the Company:
(i) paid to H.C. Wainwright & Co., at the closing of the Offering, a cash fee equal to 7.5% of the aggregate gross
proceeds of the Offering; and (ii) issued to H.C. Wainwright & Co., or its designees, such number of Common Share purchase
warrants to purchase a number of Common Shares equal to 7.5% of the sum of Common Shares and Pre-funded Warrants sold in the Offering
(the "Placement Agent Warrants"). Each Placement Agent Warrant will be immediately exercisable to acquire one Common
Share at an exercise price of CDN$3.55 per Common Share for a period of 60 months following the closing of the Offering.
The securities offered and sold by DEFSEC in the Offering
have not been registered under the United States Securities Act of 1933, as amended (the "Securities Act"), or any state
securities laws and may not be offered or sold in the United States, or to or for the account or benefit of U.S. persons, absent registration
under the Securities Act and all applicable state securities laws or pursuant to an exemption from such registration requirements. Pursuant
to a registration rights agreement, the Company has agreed to file one or more registration statements with the Securities and Exchange
Commission covering the resale of the unregistered securities issued in the Offering.
This press release shall not constitute an offer to
sell or the solicitation of an offer to buy, nor shall there be any sale of these securities in any state or jurisdiction in which such
offer, solicitation, or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction.
About DEFSEC
DEFSEC (TSXV: DFSC and DFSC.WT.U; NASDAQ: DFSC and DFSCW) develops and commercializes breakthrough next-generation tactical systems
for military and security forces. The Company's current portfolio of offerings includes digitization of tactical forces for real-time
shared situational awareness and targeting information from any source (including drones) streamed directly to users' smart devices and
weapons. Other DEFSEC products include countermeasures against threats such as electronic detection, lasers and drones. These systems
can operate stand-alone or integrate seamlessly with OEM products and battlefield management systems, and all come integrated with TAK.
The Company also has a new proprietary less-lethal product line branded PARA SHOT™ with application across all segments of
the less-lethal market, including law enforcement. The Company is headquartered in Ottawa, Canada.
For more information, please visit https://DEFSECTEC.com/
Forward-Looking Information and Statements
This press release contains "forward-looking statements" and "forward-looking information" within the meaning
of Canadian and United States securities laws (collectively, "forward-looking statements"), which may be identified by the use
of words such as "plans", "is expected", "expects", "scheduled", "intends", "contemplates",
"anticipates", "believes", "proposes" or variations (including negative and grammatical variations) of such
words and phrases, or state that certain actions, events or results "may", "could", "would", "might"
or "will" be taken, occur or be achieved. Forward looking statements in this press release include, but are not limited to,
statements regarding the intended use of the net proceeds of the Offering. Such statements are based on the current expectations of DEFSEC's
management and are based on assumptions and subject to risks and uncertainties. Although DEFSEC's management believes that the assumptions
underlying such statements are reasonable, they may prove to be incorrect. The forward-looking events and circumstances discussed in this
press release may not occur by certain specified dates or at all and could differ materially as a result of known and unknown risk factors
and uncertainties affecting DEFSEC, including general economic and stock market conditions; loss of markets; and many other factors beyond
the control of DEFSEC. Although DEFSEC has attempted to identify important factors that could cause actual actions, events or results
to differ materially from those described in forward-looking statements, there may be other factors that cause actions, events or results
to differ from those anticipated, estimated or intended. No forward-looking statement can be guaranteed. Except as required by applicable
securities laws, forward-looking statements speak only as of the date on which they are made and DEFSEC undertakes no obligation to publicly
update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.
Neither the TSXV nor its respective Regulation Services
Provider (as that term is defined in the policies of the TSXV) accepts responsibility for the adequacy or accuracy of this press release.
View original content to download multimedia:https://www.prnewswire.com/news-releases/defsec-technologies-inc-announces-closing-of-cdn5-54-million-private-placement-302854583.html
SOURCE DEFSEC Technologies Inc
View original content to download multimedia: http://www.newswire.ca/en/releases/archive/August2026/18/c7386.html
%CIK: 0001889823
For further information: Sean Homuth, President and Chief Executive
Officer, homuth@defsectec.com, (613) 863-1255; Jennifer Welsh, Chief Financial Officer and Chief Compliance Officer, welsh@defsectec.com,
(613) 241-1849 EXT 102
CO: DEFSEC Technologies Inc
CNW 18:09e 18-AUG-26