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

Arqit Quantum (ARQQ) director-linked entity sells 430 warrants

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

Rhea-AI Filing Summary

Arqit Quantum Inc. director Lefebvre d'Ovidio Manfredi, through indirect holdings in Heritage Assets SCSp, reported open-market sales of Arqit Business Combination Warrants. The entity sold 317 warrants on June 26, 2026 at $1.20 each and 113 warrants on June 29, 2026 at $1.50 each, totaling 430 warrants.

According to the footnote, the reporting person beneficially owns 374,669 Business Combination Warrants, which, if exercised in full, would be equivalent to 14,986.76 Arqit ordinary shares on a post-reverse stock split basis.

Positive

  • None.

Negative

  • None.
Insider Lefebvre d'Ovidio Manfredi
Role Director
Sold 430 shs ($549.90)
Type Security Shares Price Value
Sale Business Combination Warrants (right to buy) 113 $1.50 $169.50
Sale Business Combination Warrants (right to buy) 317 $1.20 $380.40
Holdings After Transaction: Business Combination Warrants (right to buy) — 30,086.08 shares (Indirect, Beneficially owned through Heritage Assets SCSp)
Footnotes (1)
  1. F1. 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 374,669 Business Combination Warrants, which, if exercised in full, would be equivalent to 14,986.76 ARQQ ordinary shares on a post-reverse stock split basis.
Warrants sold June 26, 2026 317 warrants at $1.20 Open-market sale of Business Combination Warrants
Warrants sold June 29, 2026 113 warrants at $1.50 Open-market sale of Business Combination Warrants
Total warrants sold 430 Business Combination Warrants Net-sell across two derivative transactions
Beneficially owned warrants 374,669 Business Combination Warrants If fully exercised, equivalent to 14,986.76 ordinary shares post-split
Share equivalent of warrants 14,986.76 ordinary shares Full exercise of 374,669 warrants post-reverse stock split
Warrant exercise price $11.50 per warrant Exercise price for Business Combination Warrants
Reverse split ratio 1-for-25 reverse stock split Every 25 ordinary shares consolidated into one
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 reduces a company's number of outstanding shares while raising the price per share proportionally, so the total value of each investor's holding is unchanged; a 1-for-10 split turns 100 shares worth $1 each into 10 shares worth $10 each. Companies often do this to regain compliance with an exchange's minimum price rule or to attract investors who avoid very low-priced stocks.
beneficially owns financial
"The reporting person beneficially owns 374,669 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.
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 securities financial
"transaction_type": "derivative""
Financial contracts whose value is tied to the price or performance of another asset, such as a stock, bond, commodity, index, or currency; examples include options, futures and swaps. They matter to investors because they let you protect against price swings, bet on future moves or gain larger exposure with less upfront cash—like using a lever or insurance policy on an investment—so they can amplify gains and losses and help manage portfolio risk.

FAQ

What insider transactions did Arqit Quantum (ARQQ) report in this Form 4?
Arqit Quantum reported two insider warrant sales by an entity associated with director Lefebvre d'Ovidio Manfredi. Heritage Assets SCSp sold 317 Business Combination Warrants at $1.20 and 113 warrants at $1.50, for a total of 430 warrants disposed.

Who carried out the Arqit Quantum (ARQQ) warrant sales disclosed here?
The warrant sales were made through Heritage Assets SCSp, an entity through which director Lefebvre d'Ovidio Manfredi has indirect beneficial ownership. The filing classifies the holdings as indirect, with transactions coded as open-market sales of derivative securities.

At what prices were Arqit Quantum (ARQQ) Business Combination Warrants sold?
The warrants were sold at two price levels. On June 26, 2026, 317 Business Combination Warrants were sold at $1.20 each. On June 29, 2026, 113 warrants were sold at $1.50 each, reflecting open-market sale transactions.

How many Arqit Quantum (ARQQ) warrants does the insider still beneficially own?
The reporting person beneficially owns 374,669 Business Combination Warrants. The footnote explains that, if exercised in full after the company’s 1-for-25 reverse stock split, these warrants would be equivalent to 14,986.76 Arqit ordinary shares on a post-split basis.

How do Arqit Quantum (ARQQ) Business Combination Warrants convert into ordinary shares?
Each Business Combination Warrant has an $11.50 exercise price and can be exercised to purchase 0.04 of an Arqit ordinary share post-reverse split. Holders must exercise at least 25 warrants to receive one whole ordinary share at a total exercise price of $287.50.

What reverse stock split affected Arqit Quantum (ARQQ) warrant terms?
Arqit implemented a 1-for-25 reverse stock split of its ordinary shares, consolidating every 25 shares into one. Following this, each Business Combination Warrant entitles the holder to 0.04 of a post-split ordinary share, changing how many warrants are needed for one whole share.

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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)
06/26/2026		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)06/26/2026S317 (1)09/03/2026Ordinary Shares317$1.215,099.32IBeneficially owned through Heritage Assets SCSp
Business Combination Warrants (right to buy)(1)06/29/2026S113 (1)09/03/2026Ordinary Shares113$1.514,986.76IBeneficially 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 374,669 Business Combination Warrants, which, if exercised in full, would be equivalent to 14,986.76 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-Fact06/30/2026
** 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