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[Form 4] Arqit Quantum Inc. Insider Trading Activity

Filing Impact
(Neutral)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

Arqit Quantum Inc.'s Chief Revenue Officer Paul Feenan reported a mix of share sales and equity vesting activity. On April 2, 2026, he completed an open-market sale of 1,632 Ordinary Shares at $13.32 per share. Following this sale, he directly held 17,963 Ordinary Shares.

On April 1, 2026, Feenan also exercised multiple tranches of Restricted Stock Units (RSUs) that convert into Ordinary Shares on a one-for-one basis, acquiring additional Ordinary Shares at a $0.00 exercise price as part of his compensation. Footnotes describe RSU grants that vest in equal quarterly installments across several dates through 2026, 2027, and 2028, indicating an ongoing schedule of stock-based compensation.

Positive

  • None.

Negative

  • None.
Insider Feenan Paul
Role Chief Revenue Officer
Sold 1,632 shs ($22K)
Approx. gross sale proceeds $22K
Approx. exercise cost $0.00
Type Security Shares Price Value
Sale Ordinary Shares 1,632 $13.32 $22K
Exercise Restricted Stock Units 1,666 $0.00 $0.00
Exercise Restricted Stock Units 122 $0.00 $0.00
Exercise Restricted Stock Units 966 $0.00 $0.00
Exercise Restricted Stock Units 472 $0.00 $0.00
Exercise Ordinary Shares 1,666 $0.00 $0.00
Exercise Ordinary Shares 122 $0.00 $0.00
Exercise Ordinary Shares 966 $0.00 $0.00
Exercise Ordinary Shares 472 $0.00 $0.00
Holdings After Transaction: Restricted Stock Units — 22,127 shares (Direct); Ordinary Shares — 17,963 shares (Direct)
Footnotes (5)
  1. F1. Restricted Stock Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis.
  2. F2. The RSUs vest quarterly in equal installments on April 1, July 1, and October 1, 2026, and January 1, April 1, July 1, and October 1, 2027.
  3. F3. The RSUs vest quarterly in equal installments on April 1, and July 1, 2026.
  4. F4. 966 RSUs vested on April 1, 2026 and the remaining RSUs vest quarterly in equal installments on July 1, and October 1, 2026, and January 1, April 1, July 1, and October 1, 2027, and January 1, April 1, July 1, and October 1, 2028.
  5. F5. The RSUs vest quarterly in equal installments on April 1, July 1, and October 1, 2026, and January 1, April 1, and July 1, 2027.
Open-market sale 1,632 shares Ordinary Shares sold on April 2, 2026
Sale price $13.32 per share Price for 1,632 Ordinary Shares sold
Shares held after sale 17,963 shares Direct Ordinary Share holdings post-transaction
RSU exercises 3,226 shares Total derivative shares exercised per transaction summary
RSU conversion ratio 1 RSU : 1 Ordinary Share As stated in RSU footnote
Restricted Stock Units financial
"Restricted Stock Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis."
Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.
open-market sale financial
"transaction_action": "open-market sale""
An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.
derivative exercise/conversion financial
"transaction_action": "derivative exercise/conversion""
vest quarterly in equal installments financial
"The RSUs vest quarterly in equal installments on April 1, July 1, and October 1, 2026..."

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Form 4 Insider Transactions: What Each Field Means →
SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Feenan Paul
(Last)(First)(Middle)
3 ORCHARD PLACE
(Street)
LONDONSW1H 0BF
(City)(State)(Zip)
UNITED KINGDOM
(Country)		2. Issuer Name and Ticker or Trading Symbol
Arqit Quantum Inc. [ ARQQ ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
Chief Revenue Officer
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
04/01/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Ordinary Shares04/01/2026M1,666A$0(1)18,035D
Ordinary Shares04/01/2026M122A$0(1)18,157D
Ordinary Shares04/01/2026M966A$0(1)19,123D
Ordinary Shares04/01/2026M472A$0(1)19,595D
Ordinary Shares04/02/2026S1,632D$13.3217,963D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Restricted Stock Units(1)04/01/2026M1,666 (2) (2)Ordinary Shares1,666$09,996D
Restricted Stock Units(1)04/01/2026M122 (3) (3)Ordinary Shares122$0119D
Restricted Stock Units(1)04/01/2026M966 (4) (4)Ordinary Shares966$09,655D
Restricted Stock Units(1)04/01/2026M472 (5) (5)Ordinary Shares472$02,357D
Explanation of Responses:
1. Restricted Stock Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis.
2. The RSUs vest quarterly in equal installments on April 1, July 1, and October 1, 2026, and January 1, April 1, July 1, and October 1, 2027.
3. The RSUs vest quarterly in equal installments on April 1, and July 1, 2026.
4. 966 RSUs vested on April 1, 2026 and the remaining RSUs vest quarterly in equal installments on July 1, and October 1, 2026, and January 1, April 1, July 1, and October 1, 2027, and January 1, April 1, July 1, and October 1, 2028.
5. The RSUs vest quarterly in equal installments on April 1, July 1, and October 1, 2026, and January 1, April 1, and July 1, 2027.
Remarks:
Due to the issuer's status as a foreign private issuer pursuant to Rule 3a12-3(b) under the Securities Exchange Act of 1934 (the "Act"), the reporting person's transactions in the issuer's securities are exempt from Sections 16(b) and 16(c) of the Act.
/s/ Noleen McDonnell, as Attorney-in-Fact04/03/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR