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Director at Arqit Quantum (NASDAQ: ARQQ) gains 4,385 shares via RSUs

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

Rhea-AI Filing Summary

Arqit Quantum Inc. director Lefebvre d'Ovidio Manfredi exercised restricted stock units to acquire additional shares. On April 1, 2026, 4,385 Restricted Stock Units converted into 4,385 Ordinary Shares at $0.00 per share, reflecting vesting of equity compensation rather than open-market buying or selling.

Following these conversions, the director holds 41,626 Ordinary Shares directly and 4,396,891 Ordinary Shares indirectly, beneficially owned through Heritage Assets SCSP. Footnotes state that RSUs convert into ARQQ Ordinary Shares on a one-for-one basis and vest in scheduled quarterly installments extending through October 1, 2028.

Positive

  • None.

Negative

  • None.
Insider Lefebvre d'Ovidio Manfredi
Role Director
Type Security Shares Price Value
Exercise Restricted Stock Units 501 $0.00 --
Exercise Restricted Stock Units 50 $0.00 --
Exercise Restricted Stock Units 3,584 $0.00 --
Exercise Restricted Stock Units 250 $0.00 --
Exercise Ordinary Shares 50 $0.00 --
Exercise Ordinary Shares 501 $0.00 --
Exercise Ordinary Shares 3,584 $0.00 --
Exercise Ordinary Shares 250 $0.00 --
holding Ordinary Shares -- -- --
Holdings After Transaction: Restricted Stock Units — 2,499 shares (Direct); Ordinary Shares — 37,291 shares (Direct); Ordinary Shares — 4,396,891 shares (Indirect, beneficially owned through Heritage Assets SCSP)
Footnotes (1)
  1. Restricted Stock Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis. 501 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. The RSUs vest quarterly in equal installments on April 1, and July 1, 2026. 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. 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.
RSUs exercised 4,385 units Restricted Stock Units converted into Ordinary Shares on April 1, 2026
Exercise price $0.00 per share Conversion price for RSUs into Ordinary Shares
Direct holdings after transaction 41,626 Ordinary Shares Director’s direct Arqit Quantum share balance post-transaction
Indirect holdings 4,396,891 Ordinary Shares Beneficially owned through Heritage Assets SCSP
Single vesting tranche 501 RSUs Vested on April 1, 2026 from one RSU grant
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.
derivative security financial
"transaction_code_description": "Exercise or conversion of derivative security""
A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.
beneficially owned financial
"beneficially owned through Heritage Assets SCSP"
Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.
one-for-one basis financial
"RSUs convert into ARQQ ordinary shares on a one-for-one basis."
vesting financial
"RSUs vested on April 1, 2026 and the remaining RSUs vest quarterly in equal installments"
Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.
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*
Lefebvre d'Ovidio Manfredi

(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)
XDirector10% Owner
Officer (give title below)Other (specify below)
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 Shares04/01/2026M50A$0(1)37,291D
Ordinary Shares04/01/2026M501A$0(1)37,792D
Ordinary Shares04/01/2026M3,584A$0(1)41,376D
Ordinary Shares04/01/2026M250A$0(1)41,626D
Ordinary Shares4,396,891Ibeneficially owned through Heritage Assets SCSP
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)04/01/2026M501 (2) (2)Ordinary Shares501$02,499D
Restricted Stock Units(1)04/01/2026M50 (3) (3)Ordinary Shares50$050D
Restricted Stock Units(1)04/01/2026M3,584 (4) (4)Ordinary Shares3,584$017,912D
Restricted Stock Units(1)04/01/2026M250 (5) (5)Ordinary Shares250$01,501D
Explanation of Responses:
1. Restricted Stock Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis.
2. 501 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.
3. The RSUs vest quarterly in equal installments on April 1, and July 1, 2026.
4. 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.
5. 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.
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)

FAQ

What did Arqit Quantum (ARQQ) director Lefebvre d'Ovidio Manfredi report on this Form 4?

The director reported exercising restricted stock units to acquire 4,385 Ordinary Shares of Arqit Quantum at $0.00 per share. These transactions reflect the scheduled vesting and conversion of equity awards, rather than open-market purchases or sales of the company’s stock.

How many Arqit Quantum (ARQQ) shares did the RSU exercises add on April 1, 2026?

The RSU exercises added 4,385 Ordinary Shares on April 1, 2026. Each Restricted Stock Unit converted into one Ordinary Share at a price of $0.00, consistent with the company’s one-for-one RSU conversion terms noted in the accompanying footnotes.

What are Lefebvre d'Ovidio Manfredi’s direct Arqit Quantum (ARQQ) holdings after these transactions?

After the RSU conversions, the director directly holds 41,626 Ordinary Shares. This figure reflects the updated post-transaction balance shown in the Form 4’s non-derivative section, incorporating all the Ordinary Shares received from the exercised restricted stock units.

What indirect Arqit Quantum (ARQQ) ownership is disclosed through Heritage Assets SCSP?

The filing shows 4,396,891 Ordinary Shares indirectly beneficially owned through Heritage Assets SCSP. This position is reported as an indirect holding, separate from the director’s direct share ownership, and does not correspond to a new transaction in this particular Form 4.

How do Arqit Quantum (ARQQ) RSUs convert into Ordinary Shares in this filing?

The footnotes explain that each Restricted Stock Unit converts into one ARQQ Ordinary Share on a one-for-one basis. RSUs in this filing vested and converted at $0.00 per share, reflecting stock-based compensation rather than cash purchases in the open market.

What vesting schedule is disclosed for the Arqit Quantum (ARQQ) RSUs?

One grant had 501 RSUs vest on April 1, 2026, with remaining RSUs vesting quarterly through October 1, 2028. Other RSU grants vest in equal quarterly installments through various dates in 2026 and 2027, creating a multi-year stream of potential future share conversions.