Arqit director-linked entity sells 188 warrants

Arqit Quantum Inc. director-linked entity sells a small number of warrants.

Rhea-AI Filing Summary

Arqit Quantum Inc. director-linked entity sells a small number of warrants. An entity associated with director Lefebvre d'Ovidio Manfredi, Heritage Assets SCSp, sold a total of 188 Business Combination Warrants in open-market transactions, including 116 warrants at $1.60 and 72 warrants at $1.90 per warrant.

The reporting person beneficially owns 602,306 Business Combination Warrants, which, if fully exercised at an exercise price of $11.50 per warrant, would be equivalent to 24,092.24 Arqit ordinary shares on a post-reverse split basis. Each warrant entitles the holder to purchase 0.04 of an ordinary share, and holders must exercise 25 warrants to receive one whole share.

Insider Trade Summary

Net Seller: 188 shares

Net Sell 2 txns

Insider Lefebvre d'Ovidio Manfredi

Role Director

Sold 188 shs ($322.40)

Type	Security	Shares	Price	Value
Sale	Business Combination Warrants (right to buy)	72	$1.90	$136.80
Sale	Business Combination Warrants (right to buy)	116	$1.60	$185.60

Holdings After Transaction: Business Combination Warrants (right to buy) — 24,092.24 contracts (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 602,306 Business Combination Warrants, which, if exercised in full, would be equivalent to 24,092.24 ARQQ ordinary shares on a post-reverse stock split basis.

Key Figures

Warrants sold at $1.60: 116 Business Combination Warrants Warrants sold at $1.90: 72 Business Combination Warrants Total warrants sold: 188 Business Combination Warrants +5 more

8 metrics

Warrants sold at $1.60 116 Business Combination Warrants Open-market sale at $1.60 per warrant on 2026-05-19

Warrants sold at $1.90 72 Business Combination Warrants Open-market sale at $1.90 per warrant on 2026-05-20

Total warrants sold 188 Business Combination Warrants Net-sell transactions reported in this Form 4

Warrants beneficially owned 602,306 Business Combination Warrants Beneficially owned through Heritage Assets SCSp

Share equivalent of warrants 24,092.24 ordinary shares Equivalent if all 602,306 warrants are exercised

Warrant exercise price $11.50 per warrant Exercise price for each Business Combination Warrant

Reverse split ratio 25-to-1 reverse stock split Every 25 ordinary shares consolidated into one share

Warrants per whole share 25 warrants per share Number of warrants required to receive one whole share

Key Terms

Business Combination Warrants, reverse stock split, beneficially owns, exercise price, +1 more

5 terms

Business Combination Warrants financial

"The reporting person beneficially owns 602,306 Business Combination Warrants, which, if exercised in full..."

reverse stock split financial

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

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 602,306 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.

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.

indirect ownership financial

"Beneficially owned through Heritage Assets SCSp appears as the nature of ownership for these warrants..."

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transactions did Arqit Quantum Inc. (ARQQ) report in this Form 4?

The filing reports two open-market sales of Business Combination Warrants totaling 188 warrants. These included 116 warrants sold at $1.60 each and 72 warrants sold at $1.90 each, all indirectly held through Heritage Assets SCSp linked to director Lefebvre d'Ovidio Manfredi.

Who is the reporting person in the Arqit Quantum Inc. (ARQQ) Form 4 filing?

The reporting person is director Lefebvre d'Ovidio Manfredi. The transactions involve warrants beneficially owned indirectly through Heritage Assets SCSp, meaning the holdings are attributed to an affiliated entity rather than being held directly in the director's personal name.

What type of security did Arqit Quantum Inc. (ARQQ) insider trade in this Form 4?

The transactions involve Business Combination Warrants, which are derivative securities giving the right to buy Arqit ordinary shares. Each warrant can be exercised at $11.50 to purchase 0.04 of an ordinary share on a post-reverse stock split basis.

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

The reporting person beneficially owns 602,306 Business Combination Warrants. If all these warrants were exercised at the stated terms, they would be equivalent to 24,092.24 Arqit ordinary shares on a post-reverse stock split basis according to the disclosure.

How did Arqit Quantum Inc. (ARQQ)’s reverse stock split affect its warrants?

Arqit implemented a 25-for-1 reverse stock split of its ordinary shares. Following this change, each Business Combination Warrant now entitles the holder to purchase 0.04 of one ordinary share, requiring 25 warrants to receive one whole share at an aggregate exercise price of $287.50.

What were the prices of the Arqit Quantum Inc. (ARQQ) warrant sales reported in the Form 4?

The reported open-market warrant sales occurred at two prices. One transaction involved 116 Business Combination Warrants sold at $1.60 per warrant, and the other involved 72 warrants sold at $1.90 per warrant, as disclosed in the filing’s transaction details.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/21/2026 - 04:05 PM Learn about SEC filing dates

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 X0 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)
05/19/2026

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)
			Code	V	Amount	(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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Business Combination Warrants (right to buy)	(1)	05/19/2026		S			116	(1)	09/03/2026	Ordinary Shares	116	$1.6	24,164.24	I	Beneficially owned through Heritage Assets SCSp
Business Combination Warrants (right to buy)	(1)	05/20/2026		S			72	(1)	09/03/2026	Ordinary Shares	72	$1.9	24,092.24	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 602,306 Business Combination Warrants, which, if exercised in full, would be equivalent to 24,092.24 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	05/21/2026
	** 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)