[144] Arqit Quantum Inc. SEC Filing

Rhea-AI Filing Summary

Form 144 filed for Arqit Quantum Inc. (ARQQ) reports a proposed sale of 1,158 common shares through Fidelity Brokerage Services LLC with an aggregate market value of $56,952.41 and approximately 11,545,354 shares outstanding. The shares subject to this notice were acquired on 10/03/2025 via restricted stock vesting and paid as compensation. The filing shows an approximate sale date of 10/06/2025.

The filer (identified elsewhere in the form) also reported three prior sales in the past three months: 956 shares on 07/07/2025 for $31,595.99, 1,091 shares on 10/02/2025 for $47,034.10, and 1,105 shares on 10/03/2025 for $55,448.57. The signer certifies there is no undisclosed material adverse information.

Positive

• Transparent disclosure of the proposed sale and prior sales, including dates and gross proceeds
• Securities to be sold were acquired by restricted stock vesting, and payment is noted as compensation

Negative

• Insider sold multiple times in the past three months (totaling 3,152 shares), which may attract investor attention
• Form 144 reports sale soon after vesting (acquired 10/03/2025, approximate sale 10/06/2025), reducing the holding period

Insights

Insider Transactions Lawyer

TL;DR: Form 144 records an insider sale after restricted stock vesting and includes prior recent sales.

The filing documents a proposed sale of 1,158 common shares acquired by restricted stock vesting on 10/03/2025, with the broker listed as Fidelity Brokerage Services LLC. The notice includes the legally required representation that no undisclosed material adverse information is known by the seller.

The main compliance dependencies are the accuracy of the acquisition and sale dates and the proper aggregation of prior sales when computing resale limits under Rule 144. Monitor any future amendments or Form 4 filings for timing or plan details that would confirm Rule 10b5-1 trading-plan protection within weeks.

Equity Analyst

TL;DR: Insider disposed of small quantities relative to outstanding shares; aggregate recent sales total 3,152 shares.

Three reported disposals in the past three months—956, 1,091, and 1,105 shares—generate disclosed gross proceeds of $31,595.99, $47,034.10, and $55,448.57 respectively. The current Form 144 covers 1,158 additional shares valued at $56,952.41.

Because the issuer has about 11,545,354 shares outstanding, these insider sales represent a small fraction of the float. Near-term attention should focus on any additional insider filings or significant volume that would change this relative scale over the next few reporting cycles.

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	1158	56952.41	11545354	10/06/2025	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	10/03/2025	Restricted Stock Vesting	Issuer			1158	10/03/2025	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
Paul Feenan 3 Orchard Place London X0 SW1H 0BF	Common	07/07/2025	956	31595.99
Paul Feenan 3 Orchard Place London X0 SW1H 0BF	Common	10/02/2025	1091	47034.10
Paul Feenan 3 Orchard Place London X0 SW1H 0BF	Common	10/03/2025	1105	55448.57

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?

It reports a proposed sale of 1,158 common shares through Fidelity Brokerage Services LLC with an aggregate market value of $56,952.41 and an approximate sale date of 10/06/2025.

How were the shares acquired that are being sold under Form 144?

The 1,158 shares were acquired on 10/03/2025 by restricted stock vesting and the payment type is listed as compensation.

Has the filer sold shares recently for ARQQ?

Yes. The filing lists three sales in the past three months: 956 shares on 07/07/2025 for $31,595.99, 1,091 shares on 10/02/2025 for $47,034.10, and 1,105 shares on 10/03/2025 for $55,448.57.

Who is the listed broker for the proposed sale?

The broker named is Fidelity Brokerage Services LLC, located at 900 Salem Street, Smithfield, RI 02917.

How large are these sales relative to ARQQ’s outstanding shares?

The issuer shows about 11,545,354 shares outstanding; the proposed sale of 1,158 shares is a small fraction of that total.