[144] Arqit Quantum Inc. SEC Filing

Rhea-AI Filing Summary

Form 144 notice for Arqit Quantum Inc. (ARQQ): An upcoming sale of 749 common shares is proposed to be executed through Fidelity Brokerage Services on 10/02/2025 with an aggregate market value of $32,290.14. The filing shows these 749 shares were acquired on 10/01/2025 on vesting of restricted stock and were received as compensation. The issuer reports 11,545,354 shares outstanding.

The filing also discloses prior sales by the same person, Andrew J. Leaver: 2,468 shares sold on 07/07/2025 for $81,567.89 and 25,000 shares sold on 07/18/2025 for $1,080,075.17. The notice includes the required declaration that the seller is not aware of undisclosed material adverse information.

Positive

• Required Rule 144 disclosure filed for the proposed sale of 749 shares
• 749 shares were acquired via restricted stock vesting and are identified as compensation

Negative

• Large insider sales in July 2025: 25,000 shares for $1,080,075.17
• Additional July sale of 2,468 shares for $81,567.89

Insights

Securities Compliance Analyst

TL;DR: Routine Rule 144 disclosure showing vested restricted shares and prior open-market insider sales.

The filing documents a proposed sale under Rule 144 of 749 shares that vested on 10/01/2025 and were classified as compensation, which is consistent with insiders selling shares received on vesting after required holding/transfer conditions are met. The notice also lists two prior sales by the same individual totaling 27,468 shares in July 2025, with gross proceeds shown; these are reported transactions rather than an unexplained transfer.

Insider Activity Analyst

TL;DR: Significant prior July sales by the same person may be material to investor interest.

The disclosure shows prior open-market sales of 25,000 shares for $1,080,075.17 and 2,468 shares for $81,567.89, which are concrete, reportable insider dispositions in the recent quarter. These historical sales provide context for the smaller proposed sale of vested compensation shares.

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

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	749	32290.14	11545354	10/02/2025	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	10/01/2025	Restricted Stock Vesting	Issuer			749	10/01/2025	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
Andrew J. Leaver 3 Orchard Place London X0 SW1H 0BF	Common	07/07/2025	2468	81567.89
Andrew J. Leaver 3 Orchard Place London X0 SW1H 0BF	Common	07/18/2025	25000	1080075.17

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 securities does the ARQQ Form 144 propose to sell?

The notice proposes sale of 749 common shares on 10/02/2025 through Fidelity Brokerage Services with an aggregate market value of $32,290.14.

How were the 749 shares acquired?

The 749 shares were acquired on 10/01/2025 by restricted stock vesting and the payment/nature is listed as compensation.

Who previously sold shares and when?

The filing lists Andrew J. Leaver selling 2,468 shares on 07/07/2025 for $81,567.89 and 25,000 shares on 07/18/2025 for $1,080,075.17.

How many Arqit shares are outstanding per the filing?

The document shows 11,545,354 shares outstanding.

Does the filing state any undisclosed material information about the issuer?

The signer represents they do not know of any material adverse information about the issuer that has not been publicly disclosed.