[144] Arqit Quantum Inc. SEC Filing

Rhea-AI Filing Summary

Arqit Quantum Inc. (ARQQ) filing a Form 144 shows an insider sale notice for 1,409 common shares acquired by restricted stock vesting on 10/03/2025 and offered for sale through Fidelity Brokerage Services. The filing lists the aggregate market value of the 1,409 shares as $69,297.02 and notes 11,545,354 shares outstanding, implying the offered block is a small fraction of the float. The filer also disclosed three prior sales in the last three months totaling 3,005 shares for gross proceeds of $135,705.71. The notice includes the customary representation that the seller is not aware of any undisclosed material adverse information.

Insights

Insider Transactions Analyst

TL;DR: Routine insider sale tied to restricted stock vesting; size is small versus total shares outstanding.

The filing shows 1,409 shares being offered following a restricted stock vesting event on 10/03/2025, with an aggregate market value of $69,297.02. Recent dispositions by the same person total 3,005 shares in the past three months for $135,705.71, indicating ongoing monetization of vested equity.

This volume represents a de minimis portion of the issuer's reported 11,545,354 outstanding shares (≈0.012% for the current notice alone), so the transaction is unlikely to be materially dilutive or signal a major change in ownership. Watch for any future filings that would show larger aggregated insider sales within a short window.

Compliance & Disclosure Specialist

TL;DR: Form 144 is a procedural disclosure; it contains the required attestation and sale details.

The notice includes the standard statement that the seller is unaware of undisclosed material adverse information and discloses broker, share counts, dates, and gross proceeds for recent sales. It records Fidelity Brokerage Services as the broker and lists sale timing beginning 10/06/2025 for the new block.

From a disclosure perspective, the filing appears to meet Rule 144 notice requirements by identifying acquisition date, nature of acquisition, payment type (compensation), and prior sales. Monitor any related Form 4 filings for actual sale execution details and exact transaction timing.

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	1409	69297.02	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			1409	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
Nicholas Pointon 3 Orchard Place London X0 SW1H 0BF	Common	07/07/2025	333	11005.72
Nicholas Pointon 3 Orchard Place London X0 SW1H 0BF	Common	10/02/2025	1327	57208.30
Nicholas Pointon 3 Orchard Place London X0 SW1H 0BF	Common	10/03/2025	1345	67491.69

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 disclose about the proposed sale?

The Form 144 discloses a proposed sale of 1,409 common shares with an aggregate market value of $69,297.02, to be sold via Fidelity Brokerage Services on or about 10/06/2025.

Who acquired the shares being sold and how were they acquired?

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

Has the filer sold other ARQQ shares recently?

Yes. The filer disclosed three sales in the past three months totaling 3,005 shares for gross proceeds of $135,705.71 (sales dated 07/07/2025, 10/02/2025, and 10/03/2025).

How large is this proposed sale relative to ARQQ's outstanding shares?

The filing lists 11,545,354 shares outstanding, so the proposed 1,409-share sale is a very small fraction of outstanding shares (approximately 0.012% of the total).

Does the Form 144 state any undisclosed adverse information about the company?

No. The signer represents that they do not know any material adverse information about the issuer that has not been publicly disclosed.