Arqit Quantum director entity sells 1,788 warrants

Arqit Quantum Inc. director Lefebvre d'Ovidio Manfredi reported indirect open-market sales of Business Combination Warrants beneficially owned through Heritage Assets SCSp.

Rhea-AI Filing Summary

Arqit Quantum Inc. director Lefebvre d'Ovidio Manfredi reported indirect open-market sales of Business Combination Warrants beneficially owned through Heritage Assets SCSp. On May 21 and May 22, the entity sold a total of 1,788 warrants at prices of $2.10 and $1.90 per warrant.

After these transactions, the reporting person continues to beneficially own 557,584 Business Combination Warrants, which the footnote states are equivalent to 22,303.36 ordinary shares on a post-reverse stock split basis. Each warrant has an exercise price of $11.50 and can be exercised until September 3, 2026.

Insider Trade Summary

Net Seller: 1,788 shares

Net Sell 2 txns

Insider Lefebvre d'Ovidio Manfredi

Role Director

Sold 1,788 shs ($4K)

Type	Security	Shares	Price	Value
Sale	Business Combination Warrants (right to buy)	1,001	$1.90	$2K
Sale	Business Combination Warrants (right to buy)	787	$2.10	$2K

Holdings After Transaction: Business Combination Warrants (right to buy) — 45,608.16 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 557,584 Business Combination Warrants, which, if exercised in full, would be equivalent to 22,303.36 ARQQ ordinary shares on a post-reverse stock split basis.

Key Figures

Warrants sold May 22: 1,001 warrants at $1.90 Warrants sold May 21: 787 warrants at $2.10 Total warrants sold: 1,788 warrants +5 more

8 metrics

Warrants sold May 22 1,001 warrants at $1.90 Open-market sale of Business Combination Warrants on May 22, 2026

Warrants sold May 21 787 warrants at $2.10 Open-market sale of Business Combination Warrants on May 21, 2026

Total warrants sold 1,788 warrants Net sell transactions reported in this Form 4

Warrants remaining 557,584 warrants Beneficially owned after transactions, per footnote

Share equivalent 22,303.36 shares Ordinary share equivalent of 557,584 warrants post-reverse split

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

Exercise ratio 0.04 share per warrant Post-reverse split entitlement per Business Combination Warrant

Warrant expiration September 3, 2026 Expiration date of the Business Combination Warrants

Key Terms

Business Combination Warrants, reverse stock split, exercise price, ordinary shares

4 terms

Business Combination Warrants financial

"The reporting person beneficially owns 557,584 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.

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.

ordinary shares financial

"would be equivalent to 22,303.36 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.

FAQ

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

What did the Arqit Quantum Inc. (ARQQ) Form 4 insider sell?

The Form 4 shows indirect open-market sales of Business Combination Warrants beneficially owned through Heritage Assets SCSp. These derivative securities give the holder the right to buy Arqit ordinary shares under specified terms, including a fixed exercise price and expiration date.

How many Arqit Quantum (ARQQ) warrants were sold and at what prices?

Two indirect open-market sales occurred, totaling 1,788 Business Combination Warrants. On May 21, 787 warrants sold at $2.10 each, and on May 22, 1,001 warrants sold at $1.90 each, according to the reported transaction details in the filing.

How many Arqit Quantum (ARQQ) warrants does the insider still beneficially own?

The footnote states the reporting person beneficially owns 557,584 Business Combination Warrants. On a post-reverse stock split basis, this position would be equivalent to 22,303.36 Arqit ordinary shares if all warrants were exercised in full under the stated terms.

What are the key terms of Arqit Quantum (ARQQ) 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 post-reverse split. Holders must exercise at least 25 warrants to receive one whole ordinary share, per the disclosed footnote.

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

Arqit implemented a reverse stock split where every 25 ordinary shares became one share. Following this, each Business Combination Warrant entitles the holder to 0.04 of an ordinary share, requiring 25 warrants to receive one whole share at a total exercise price of $287.50.

When do the reported Arqit Quantum (ARQQ) Business Combination Warrants expire?

The transactions involve Business Combination Warrants with an expiration date of September 3, 2026. Until that date, warrant holders may elect to exercise under the stated terms, including the $11.50 exercise price and minimum quantity required for a whole ordinary share.

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

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Accepted by SEC EDGAR 05/26/2026 - 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)
05/21/2026

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)	05/21/2026		S			787	(1)	09/03/2026	Ordinary Shares	787	$2.1	23,304.8	I	Beneficially owned through Heritage Assets SCSp
Business Combination Warrants (right to buy)	(1)	05/22/2026		S			1,001	(1)	09/03/2026	Ordinary Shares	1,001	$1.9	22,303.36	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 557,584 Business Combination Warrants, which, if exercised in full, would be equivalent to 22,303.36 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-Fact	05/26/2026
	** 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)