Arqit Quantum director sells 415 warrants

Arqit Quantum Inc. director Lefebvre d'Ovidio Manfredi, through Heritage Assets SCSp, reported open-market sales of 415 Business Combination Warrants linked to Arqit ordinary shares.

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Form Type

Rhea-AI Filing Summary

Arqit Quantum Inc. director Lefebvre d'Ovidio Manfredi, through Heritage Assets SCSp, reported open-market sales of 415 Business Combination Warrants linked to Arqit ordinary shares. The warrants were sold on two days at $2.20 each.

Each Business Combination Warrant carries an exercise price of $11.50 and entitles the holder to purchase 0.04 of an Arqit ordinary share on a post–reverse stock split basis. After these sales, Heritage Assets SCSp beneficially owns 623,249 Business Combination Warrants, equivalent to 24,929.96 Arqit ordinary shares following a 25‑for‑1 reverse stock split implemented on September 19, 2024.

Insider Trade Summary

Net Seller: 415 shares

Net Sell 2 txns

Insider Lefebvre d'Ovidio Manfredi

Role Director

Sold 415 shs ($913.00)

Type	Security	Shares	Price	Value
Sale	Business Combination Warrants (right to buy)	11	$2.20	$24.20
Sale	Business Combination Warrants (right to buy)	404	$2.20	$888.80

Holdings After Transaction: Business Combination Warrants (right to buy) — 49,871.24 contracts (Indirect, Beneficially owned through Heritage Assets SCSp)

Footnotes (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 623,249 Business Combination Warrants, which, if exercised in full, would be equivalent to 24,929.96 ARQQ ordinary shares on a post-reverse stock split basis.

Key Figures

Warrants sold: 415 Business Combination Warrants Sale price: $2.20 per warrant Warrants remaining: 623,249 warrants +5 more

8 metrics

Warrants sold 415 Business Combination Warrants Open-market sales reported on May 6–7, 2026

Sale price $2.20 per warrant Transaction price per warrant in both sales

Warrants remaining 623,249 warrants Beneficially owned through Heritage Assets SCSp after transactions

Share equivalent 24,929.96 ordinary shares Equivalent if all 623,249 warrants are exercised post-split

Warrant exercise price $11.50 per warrant Exercise price to purchase underlying Arqit ordinary shares

Reverse split ratio 25-for-1 Reverse stock split implemented on September 19, 2024

Share per warrant 0.04 ordinary share Underlying Arqit share per warrant after reverse split

Aggregate exercise price per whole share $287.50 per ordinary share 25 warrants required to receive one whole share

Key Terms

reverse stock split, Business Combination Warrants, beneficially owns, par value, +1 more

5 terms

reverse stock split financial

"announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated"

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.

Business Combination Warrants financial

"The reporting person beneficially owns 623,249 Business Combination Warrants, which, if exercised in full"

beneficially owns financial

"The reporting person beneficially owns 623,249 Business Combination Warrants, which, if exercised in full"

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.

par value financial

"one ordinary share, par value $0.0025 per share"

Par value is the fixed amount printed on a bond or stock that represents its original value when issued. It’s like the face value of a coin or bill—what the issuer promises to pay back or the starting price of a stock—though it often doesn’t change with market prices. It matters because it helps determine certain financial details, like how much the company will pay back at maturity.

exercise price financial

"Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time"

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.

FAQ

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

Arqit Quantum reported that director Lefebvre d'Ovidio Manfredi, via Heritage Assets SCSp, sold 415 Business Combination Warrants in open-market transactions at $2.20 each. These derivative securities are rights to buy Arqit ordinary shares under specified terms and prices.

How many Arqit Quantum Business Combination Warrants does the reporting person still hold?

Following the reported sales, Heritage Assets SCSp beneficially owns 623,249 Business Combination Warrants. If fully exercised, these warrants would be equivalent to 24,929.96 Arqit Quantum ordinary shares on a post–reverse stock split basis, according to the filing’s detailed footnote disclosure.

What are the key terms of Arqit Quantum’s Business Combination Warrants?

Each Business Combination Warrant has an exercise price of $11.50 and can be exercised to purchase 0.04 of an Arqit ordinary share. Warrants cannot be exercised for fractional shares, so at least 25 warrants are needed to receive one whole ordinary share.

How did Arqit Quantum’s reverse stock split affect these warrants?

Arqit Quantum implemented a 25‑for‑1 reverse stock split on September 19, 2024, consolidating every 25 ordinary shares into one share. After this, each warrant entitles the holder to 0.04 of a post‑split share, requiring 25 warrants to obtain one whole ordinary share.

Who actually owns the Arqit Quantum warrants reported in this filing?

The warrants are beneficially owned through Heritage Assets SCSp, as stated in the filing. Director Lefebvre d'Ovidio Manfredi is the reporting person, but the ownership is indirect, reflecting the position held by this associated investment vehicle rather than direct personal holdings.

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Accepted by SEC EDGAR 05/08/2026 - 04:05 PM EDT

SEC Form 4

FORM 4

UNITED 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)

LONDON

SW1H 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)

X	Director	10% Owner
	Officer (give title below)	Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/06/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form 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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)

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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Business Combination Warrants (right to buy)	⁽¹⁾	05/06/2026		S			404	⁽¹⁾	09/03/2026	Ordinary Shares	404	$2.2	24,941.28	I	Beneficially owned through Heritage Assets SCSp
Business Combination Warrants (right to buy)	⁽¹⁾	05/07/2026		S			11	⁽¹⁾	09/03/2026	Ordinary Shares	11	$2.2	24,929.96	I	Beneficially 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 623,249 Business Combination Warrants, which, if exercised in full, would be equivalent to 24,929.96 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-Fact	05/08/2026
	** Signature of Reporting Person	Date
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