Arqit Quantum (ARQQ) Insider Filing Reports 820-Share Sale

Rhea-AI Filing Summary

Arqit Quantum Inc. filed a Form 144 reporting a proposed sale of 820 common shares valued at an aggregate market value of $41,147.36. The shares were acquired on 10/02/2025 through Restricted Stock Vesting as compensation and the filing lists the approximate sale date as 10/03/2025 on NASDAQ. The filing also discloses two recent sales by the same person: 3 shares on 09/03/2025 for $84.99 and 811 shares on 10/02/2025 for $34,963.02. The notice includes the seller's attestation that they have no undisclosed material information.

Positive

• Filer disclosed acquisition method (Restricted Stock Vesting on 10/02/2025)
• Proposed sale disclosed with broker (Fidelity Brokerage Services LLC) and exchange (NASDAQ)
• Seller attested they have no undisclosed material information

Negative

• Insider intends to sell 820 shares valued at $41,147.36
• Recent insider sales of 3 and 811 shares in prior months

Insights

Insider Transactions Analyst

Insider plans to sell 820 shares acquired via vesting on 10/02/2025.

The Form 144 shows the securities were obtained by Restricted Stock Vesting and are proposed for sale on 10/03/2025 through Fidelity Brokerage Services LLC on NASDAQ. The filing also documents recent small sales totaling 814 shares across 09/03/2025 and 10/02/2025, with combined gross proceeds of $34, + $84.99 as listed.

This is a routine compliance disclosure that notifies the market of an intended insider sale and includes the seller's certification about undisclosed material information.

Compliance Specialist

Form 144 filing documents compliance with Rule 144 for an insider sale.

The notice identifies the broker as Fidelity Brokerage Services LLC and records the acquisition date and nature of payment as 10/02/2025 and Compensation, respectively. The seller signs the standard attestation regarding material nonpublic information.

Because the filing lists the sale date and broker, it serves as a public record that the seller is following required resale procedures; no regulatory action or other compliance issue is stated.

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

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

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	820	41147.36	11545354	10/03/2025	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	10/02/2025	Restricted Stock Vesting	Issuer			820	10/02/2025	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
Daniel Shiu 3 Orchard Place London X0 SW1H 0BF	Common	09/03/2025	3	84.99
Daniel Shiu 3 Orchard Place London X0 SW1H 0BF	Common	10/02/2025	811	34963.02

144: Remarks and Signature

Remarks

Date of Notice

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does the ARQQ Form 144 report?

The filing reports a proposed sale of 820 common shares valued at $41,147.36, acquired via Restricted Stock Vesting on 10/02/2025 and proposed to be sold on 10/03/2025 on NASDAQ.

Who is the seller named in the Form 144 for ARQQ?

The filing identifies the seller as Daniel Shiu, with recent sales recorded on 09/03/2025 (3 shares) and 10/02/2025 (811 shares).

Through which broker will the ARQQ shares be sold?

The proposed sale lists Fidelity Brokerage Services LLC as the broker (address: 900 Salem Street, Smithfield, RI).

How were the 820 shares acquired?

The 820 shares were acquired on 10/02/2025 through Restricted Stock Vesting and payment is listed as Compensation.

What proceeds were reported for recent sales by the same person?

The filing reports gross proceeds of $84.99 for 3 shares sold on 09/03/2025 and $34,963.02 for 811 shares sold on 10/02/2025.