Clear Street LLC discloses 18.6% stake in DEFSEC (DFSC)

Rhea-AI Filing Summary

DEFSEC Technologies Inc. ownership disclosure: Clear Street LLC reports beneficial ownership of 371,288 shares of Common Stock, representing 18.6% of the class. The filing states Clear Street has sole voting and sole dispositive power over the 371,288 shares. The filing is signed by John DiBacco, Head of Markets Trading with a signature date of 05/13/2026.

Insights

Institutional Ownership Analyst

Large passive ownership stake disclosed by Clear Street LLC.

Clear Street LLC reports beneficial ownership of 371,288 shares, equal to 18.6% of the outstanding common stock. The filing lists sole voting and dispositive power for the full share count, which indicates control over how those shares are voted and disposed.

Watch for future amendments or Schedule 13D filings if the holder's intent or level of activism changes; subsequent disclosures would show any change to ownership or voting plans.

Corporate Governance Expert

Disclosure clarifies who controls a meaningful block of shares.

The Schedule 13G identifies Clear Street LLC as the reporting person and provides an address and CUSIP 244778106. The signature block names John DiBacco and a filing date of 05/13/2026, providing an explicit contact and timing anchor for the ownership position.

Because this is a Schedule 13G, the filing implies a passive intent as presented; any change toward active influence would typically require a different disclosure form.

Key Figures

Shares beneficially owned: 371,288 shares Percent of class: 18.6% CUSIP: 244778106 +3 more

6 metrics

Shares beneficially owned 371,288 shares Common Stock

Percent of class 18.6% Percent of outstanding common stock

CUSIP 244778106 Common Stock CUSIP

Sole voting power 371,288 shares Number with sole voting power

Sole dispositive power 371,288 shares Number with sole dispositive power

Filer signature date 05/13/2026 Signature date on filing

Key Terms

Schedule 13G, Beneficial ownership, Sole dispositive power, CUSIP

4 terms

Schedule 13G regulatory

"Item 1. (a) Name of issuer: DEFSEC Technologies Inc."

A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.

Beneficial ownership financial

"Item 4. (a) Amount beneficially owned: 371288"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

Sole dispositive power regulatory

"Item 4. (iii) Sole power to dispose or to direct the disposition of: 371288"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

CUSIP market

"CUSIP Number(s): 244778106"

A CUSIP is a nine-character alphanumeric code that uniquely identifies a U.S. or Canadian financial security—such as a stock, bond, or fund share—like a Social Security number for an investment. It matters to investors because brokers, exchanges and record-keepers use the CUSIP to match trades, track ownership, settle transactions and pull accurate records, reducing errors and ensuring money and securities go to the right place.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

DEFSEC Technologies Inc.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

244778106

(CUSIP Number)

05/05/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 244778106

1

Names of Reporting Persons

Clear Street LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

NEW YORK

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 371,288.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

371,288.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

18.6 %

12

Type of Reporting Person (See Instructions)

BD

SCHEDULE 13G

Item 1.
(a)	Name of issuer: DEFSEC Technologies Inc.
(b)	Address of issuer's principal executive offices: 80 Hines Rd, Suite 300, Ottawa, Ontario, K2K 2T8
Item 2.
(a)	Name of person filing: Clear Street LLC
(b)	Address or principal business office or, if none, residence: 4 WORLD TRADE CENTER, 150 Greenwich St Floor 45 New York, NY 10007
(c)	Citizenship: United States
(d)	Title of class of securities: Common Stock
(e)	CUSIP Number(s): 244778106
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 371288
(b)	Percent of class: 18.6 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 371288
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 371288
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10. Certifications:

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Clear Street LLC

Signature:	John DiBacco
Name/Title:	Head of Markets Trading
Date:	05/13/2026

FAQ

What percentage of DEFSEC (DFSC) does Clear Street LLC own?

Clear Street LLC beneficially owns 18.6% of DEFSEC's common stock, according to the filing. The Schedule 13G lists 371,288 shares as the amount beneficially owned and shows voting and dispositive power over those shares.

Does Clear Street LLC have voting control over the shares of DFSC?

Yes. The filing states Clear Street LLC has sole voting power and sole dispositive power over 371,288 shares. That indicates the filer controls how the shares are voted and how they may be disposed.

What is the filing date and who signed the Schedule 13G for DFSC?

The Schedule 13G shows a signature by John DiBacco, Head of Markets Trading, with a signature date of 05/13/2026. The cover CUSIP is 244778106 for the common stock class.

What information does a Schedule 13G disclose for DFSC?

A Schedule 13G discloses beneficial ownership details such as the number of shares, percent of class, and voting/dispositive power. For DFSC, it reports 371,288 shares and 18.6% ownership with sole voting/dispositive powers.

Does this Schedule 13G mean Clear Street LLC is seeking control of DFSC?

The filing lists ownership and control attributes but does not by itself state intent. The Schedule 13G format typically indicates a passive investor disclosure; any active-control intent would generally be reflected by a different filing type.