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  4. [Form 4] Arqit Quantum Inc. Insider Trading Activity

Arqit (ARQQ) director-linked entity trims Business Combination Warrants

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

Rhea-AI Filing Summary

Arqit Quantum Inc. director Lefebvre d'Ovidio Manfredi, through Heritage Assets SCSp, reported small open-market sales of Business Combination Warrants. The entity sold 132 warrants on June 2, 2026 and 106 warrants on June 1, 2026, both at $1.60 per warrant. The footnote states the reporting person beneficially owns 534,634 such warrants in total, which, if fully exercised at an exercise price of $11.50 each for 0.04 of an ordinary share per warrant, would equal 21,385.36 ordinary shares on a post–reverse stock split basis. The warrants relate to Arqit’s 25‑for‑1 reverse stock split and are exercisable until September 3, 2026.

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Insider Lefebvre d'Ovidio Manfredi
Role null
Sold 238 shs ($380.80)
Type Security Shares Price Value
Sale Business Combination Warrants (right to buy) 132 $1.60 $211.20
Sale Business Combination Warrants (right to buy) 106 $1.60 $169.60
Holdings After Transaction: Business Combination Warrants (right to buy) — 21,385.36 shares (Indirect, Beneficially owned through Heritage Assets SCSp)
Footnotes (1)
  1. [object Object]
Warrants sold June 2, 2026 132 warrants at $1.60 Open-market sale via Heritage Assets SCSp
Warrants sold June 1, 2026 106 warrants at $1.60 Open-market sale via Heritage Assets SCSp
Total warrants beneficially owned 534,634 warrants Equivalent to 21,385.36 ordinary shares if fully exercised
Underlying share equivalent 21,385.36 ordinary shares Post–reverse stock split basis if all warrants exercised
Warrant exercise price $11.50 per warrant Exercise price for Business Combination Warrants
Warrant share ratio 0.04 share per warrant Post–reverse stock split conversion ratio
Reverse stock split ratio 25-for-1 Every 25 shares consolidated into one ordinary share
Warrant expiration date September 3, 2026 Business Combination Warrants exercisable until this date
Business Combination Warrants financial
"Each Business Combination Warrant has an exercise price of $11.50"
reverse stock split financial
"announced the implementation of a reverse stock split whereby every 25 outstanding"
A reverse stock split is when a company reduces the number of its shares outstanding, making each share more valuable. For example, if you own 100 shares worth $1 each, a 1-for-10 reverse split would turn your 100 shares into 10 shares worth $10 each. Companies often do this to boost their stock price and appear more stable to investors.
beneficially owns financial
"The reporting person beneficially owns 534,634 Business Combination Warrants"
Beneficially owns means a person or entity enjoys the economic benefits and control of a security even if the legal title or registration is held in another name. Think of it like having the keys and profits from a car that is registered to a friend: you use it, benefit from it, and make decisions about it even though the official paperwork lists someone else. For investors, this matters because it reveals who truly controls shares, affects voting power, potential conflicts of interest, and regulatory disclosure obligations.
exercise price financial
"Each Business Combination Warrant has an exercise price of $11.50"
The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.
ordinary shares financial
"would be equivalent to 21,385.36 ARQQ ordinary shares on a post-reverse stock split basis"
Ordinary shares are a type of ownership stake in a company, giving shareholders a right to participate in the company’s profits and decision-making through voting. They are similar to owning a piece of a business, and their value can rise or fall based on the company's performance. Investors buy ordinary shares to potentially earn dividends and benefit from the company's growth over time.
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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*
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)
06/01/2026		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
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
Business Combination Warrants (right to buy)(1)06/01/2026S106 (1)09/03/2026Ordinary Shares106$1.621,517.36IBeneficially owned through Heritage Assets SCSp
Business Combination Warrants (right to buy)(1)06/02/2026S132 (1)09/03/2026Ordinary Shares132$1.621,385.36IBeneficially owned through Heritage Assets SCSp
Explanation of Responses:
1. On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 534,634 Business Combination Warrants, which, if exercised in full, would be equivalent to 21,385.36 ARQQ ordinary shares on a post-reverse stock split basis.
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/ Amir Heyat, as Attorney-in-Fact06/03/2026
** 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

FAQ

What insider activity did Arqit Quantum (ARQQ) report in this Form 4?

The filing reports two small open-market sales of Business Combination Warrants linked to Arqit Quantum Inc. A total of 238 warrants were sold across two days at $1.60 per warrant by an entity associated with director Lefebvre d'Ovidio Manfredi.

Who conducted the warrant sales reported for Arqit Quantum (ARQQ)?

The sales are attributed to Heritage Assets SCSp, an entity through which director Lefebvre d'Ovidio Manfredi beneficially owns Arqit Business Combination Warrants. The Form 4 shows the ownership as indirect, reflecting that the warrants are held via this related investment vehicle.

How many Arqit (ARQQ) Business Combination Warrants were sold and at what price?

Heritage Assets SCSp sold 132 Business Combination Warrants on June 2, 2026 and 106 on June 1, 2026. Each transaction was executed at a price of $1.60 per warrant in open-market or private transactions, according to the Form 4 disclosure.

How many Arqit (ARQQ) warrants does the reporting person still beneficially own?

The footnote states the reporting person beneficially owns 534,634 Business Combination Warrants after the reported transactions. If all were exercised under current terms, they would be equivalent to 21,385.36 Arqit ordinary shares on a post–reverse stock split basis.

What are the key terms of Arqit (ARQQ) Business Combination Warrants in this filing?

Each Business Combination Warrant has an exercise price of $11.50 and entitles the holder to purchase 0.04 of an Arqit ordinary share. Warrants cannot be exercised for fractional shares and are exercisable until September 3, 2026 on a post–reverse stock split basis.

How did Arqit’s reverse stock split affect these Business Combination Warrants?

Arqit implemented a 25‑for‑1 reverse stock split of its ordinary shares. Following this, each Business Combination Warrant became exercisable for 0.04 of a post-split share, requiring at least 25 warrants to receive one whole ordinary share at an aggregate $287.50 exercise price.