Arqit Quantum (ARQQ) director sells 493 business combination warrants

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

Arqit Quantum Inc. director Lefebvre d'Ovidio Manfredi, through Heritage Assets SCSp, reported open-market sales of Business Combination Warrants tied to ARQQ ordinary shares. The entity sold 402 warrants on May 1, 2026 at $2.10 and 91 warrants on April 30, 2026 at $2.30.

These warrants each have a $11.50 exercise price and, after a 25-for-1 reverse stock split, entitle the holder to purchase 0.04 ARQQ ordinary share, requiring 25 warrants for one whole share. The reporting person beneficially owns 643,533 Business Combination Warrants, which are equivalent to 25,741.32 ARQQ ordinary shares if exercised in full.

Insider Trade Summary

Net Seller: 493 shares ($1,054)

Net Sell 2 txns

Insider Lefebvre d'Ovidio Manfredi

Role null

Sold 493 shs ($1K)

Type	Security	Shares	Price	Value
Sale	Business Combination Warrants (right to buy)	402	$2.10	$844.20
Sale	Business Combination Warrants (right to buy)	91	$2.30	$209.30

Holdings After Transaction: Business Combination Warrants (right to buy) — 25,741.32 shares (Indirect, Beneficially owned through Heritage Assets SCSp)

Footnotes (1)

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Key Figures

Warrants sold May 1, 2026: 402 warrants at $2.10 Warrants sold April 30, 2026: 91 warrants at $2.30 Total warrants sold: 493 Business Combination Warrants +5 more

8 metrics

Warrants sold May 1, 2026 402 warrants at $2.10 Open-market sale of Business Combination Warrants

Warrants sold April 30, 2026 91 warrants at $2.30 Open-market sale of Business Combination Warrants

Total warrants sold 493 Business Combination Warrants Net-sell across two derivative transactions

Beneficially owned warrants 643,533 warrants Equivalent to 25,741.32 ARQQ ordinary shares if fully exercised

Reverse stock split ratio 25-for-1 Every 25 ARQQ ordinary shares consolidated into one

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

Share per warrant 0.04 ordinary share Post-reverse split entitlement per warrant

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

Key Terms

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

5 terms

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 643,533 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.

aggregate exercise price financial

"an aggregate exercise price of $287.50 per whole ARQQ ordinary share"

ordinary shares financial

"would be equivalent to 25,741.32 ARQQ ordinary shares on a post-reverse"

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.

Form 4 Insider Transactions: What Each Field Means →

05/04/2026 - 04:05 PM

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)
04/30/2026

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⁾	04/30/2026		S			91	⁽¹⁾	09/03/2026	Ordinary Shares	91	$2.3	26,142.92	I	Beneficially owned through Heritage Assets SCSp
Business Combination Warrants (right to buy)	⁽¹⁾	05/01/2026		S			402	⁽¹⁾	09/03/2026	Ordinary Shares	402	$2.1	25,741.32	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 643,533 Business Combination Warrants, which, if exercised in full, would be equivalent to 25,741.32 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	05/04/2026
	** 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

FAQ

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

The filing reports that a director, through Heritage Assets SCSp, sold 493 Business Combination Warrants in open-market transactions. These derivative securities are linked to ARQQ ordinary shares and represent only a small portion of the warrants beneficially owned.

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

Heritage Assets SCSp sold 402 Business Combination Warrants on May 1, 2026 at $2.10 each and 91 warrants on April 30, 2026 at $2.30 each. Both transactions are recorded as open-market sales of derivative securities.

What does the Arqit Quantum (ARQQ) warrant structure look like after the reverse split?

Each Business Combination Warrant has an $11.50 exercise price and now entitles the holder to purchase 0.04 ARQQ ordinary share. Holders must exercise 25 warrants to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50.

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

The reporting person beneficially owns 643,533 Business Combination Warrants through Heritage Assets SCSp. If exercised in full, these warrants would be equivalent to 25,741.32 ARQQ ordinary shares on a post-reverse stock split basis, according to the disclosure.

How is the Arqit Quantum (ARQQ) director’s ownership held for these warrant transactions?

The Form 4 shows the warrants as indirectly owned, with the nature of ownership described as beneficially owned through Heritage Assets SCSp. The reported open-market sales therefore relate to this associated entity rather than direct personal holdings.