ARQQ Form 144: Notice of Proposed Common Stock Sale

ARQQ submitted a Form 144 notice relating to proposed sales of Common stock.

Rhea-AI Filing Summary

ARQQ submitted a Form 144 notice relating to proposed sales of Common stock. The filing lists Restricted Stock Vesting dated 04/01/2026 and contains a filer entry for Fidelity Brokerage Services LLC with an action date of 04/02/2026. The filing also records a sale-related entry for Paul Feenan dated 01/02/2026.

Insights

Securities Compliance Analyst

Form 144 flags a proposed resale under Rule 144 tied to restricted stock vesting.

The filing lists Restricted Stock Vesting on 04/01/2026 and identifies Fidelity Brokerage Services LLC as a securities intermediary with an entry date of 04/02/2026. The notice records an individual entry for Paul Feenan dated 01/02/2026.

Timing and quantities are recorded in the table; the filing constitutes a standard Rule 144 notice and does not itself effect a sale. Subsequent broker reports or Form 4/Form 5 entries would show completed transactions.

Key Figures

Listed share/unit count: 1,632 Intermediary entry date: 04/02/2026 Registrant individual entry date: 01/02/2026

3 metrics

Listed share/unit count 1,632 appears on securities and vesting rows dated 04/01/2026

Intermediary entry date 04/02/2026 Fidelity Brokerage Services LLC entry in the filing

Registrant individual entry date 01/02/2026 Paul Feenan listed with a dated sale-related entry

Key Terms

Restricted Stock Vesting, Form 144, Issuer

3 terms

Restricted Stock Vesting financial

"Common | 04/01/2026 | Restricted Stock Vesting"

Restricted stock vesting is the timetable and conditions under which shares granted to employees or insiders become fully owned and can be sold, typically requiring continued work or meeting performance goals. It matters to investors because large blocks of shares can become tradable at once, which can change share supply and price, and because vesting aligns insiders’ incentives with the company’s long‑term performance—think of it like a timed unlock that both rewards and locks in key people.

Form 144 regulatory

"Filer Information | 144: Filer Information"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

Issuer financial

"Restricted Stock Vesting | Issuer"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does ARQQ's Form 144 mean for proposed sales?

A Form 144 notifies the market of a proposed resale of restricted or controlled shares. This filing lists Restricted Stock Vesting dated 04/01/2026 and a broker entry on 04/02/2026.

Who is the broker or intermediary listed in the ARQQ Form 144?

The filing shows Fidelity Brokerage Services LLC at 900 Salem Street, Smithfield, RI. An entry date of 04/02/2026 appears alongside that intermediary.

Does ARQQ's Form 144 record an individual seller?

Yes. The filing includes an entry for Paul Feenan with an address and a dated record of 01/02/2026, indicating personal sale-related reporting in the notice.

Is the quantity of shares to be sold stated in the filing?

The table shows a repeated numeric entry of 1632 associated with the securities line. The filing ties that number to the securities rows and the vesting/compensation line dated 04/01/2026.

Does this Form 144 mean the shares have already been sold?

No. A Form 144 is a notice of intent to resell under Rule 144. The filing shows dates and intermediary details but does not itself document settlement or completed open‑market sales.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 04/02/2026 - 04:10 PM EDT Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001967068
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Arqit Quantum Inc.
SEC File Number	001-40777
Address of Issuer	3 ORCHARD PLACE LONDON UNITED KINGDOM SW1H 0BF
Phone	44 203 91 70155
Name of Person for Whose Account the Securities are To Be Sold	Feenan Paul
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	1632	21748.20	15291767	04/02/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	04/01/2026	Restricted Stock Vesting	Issuer			1632	04/01/2026	Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Paul Feenan 3 Orchard Place London X0 SW1H 0BF	Common	01/02/2026	1733	39620.54

144: Remarks and Signature

Remarks	Sale includes an amount necessary to cover a tax obligation resulting from the settlement of a vested equity award distribution.
Date of Notice	04/02/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/Wade Moss, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Paul Feenan
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)