Arqit insider-linked entity sells 13 warrants

Arqit Quantum Inc. insider-linked entity reported a small open-market sale of Business Combination Warrants.

Rhea-AI Filing Summary

Arqit Quantum Inc. insider-linked entity reported a small open-market sale of Business Combination Warrants. On 2026-05-12, Heritage Assets SCSp, associated with director Lefebvre d'Ovidio Manfredi, sold 13 Business Combination Warrants at $1.80 each. These warrants are exercisable at $11.50 per warrant to purchase 0.04 of an Arqit ordinary share and expire on 2026-09-03. After this transaction, the reporting person beneficially owns 615,597 Business Combination Warrants, equivalent to 24,623.88 Arqit ordinary shares on a post-reverse stock split basis.

Insider Trade Summary

Net Seller: 13 shares

Net Sell 1 txn

Insider Lefebvre d'Ovidio Manfredi

Role Director

Sold 13 shs ($23.40)

Type	Security	Shares	Price	Value
Sale	Business Combination Warrants (right to buy)	13	$1.80	$23.40

Holdings After Transaction: Business Combination Warrants (right to buy) — 24,623.88 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 615,597 Business Combination Warrants, which, if exercised in full, would be equivalent to 24,623.88 ARQQ ordinary shares on a post-reverse stock split basis.

Key Figures

Warrants sold: 13 warrants Sale price per warrant: $1.80 per warrant Warrants remaining: 615,597 warrants +5 more

8 metrics

Warrants sold 13 warrants Business Combination Warrants sold on May 12, 2026

Sale price per warrant $1.80 per warrant Open-market sale of Business Combination Warrants

Warrants remaining 615,597 warrants Business Combination Warrants beneficially owned after transaction

Equivalent ordinary shares 24,623.88 shares Ordinary share equivalent if all warrants exercised post-split

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

Shares per warrant 0.04 share per warrant Post-reverse stock split underlying share ratio

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

Aggregate exercise price per share $287.50 per share Total exercise cost to receive one whole ordinary share

Key Terms

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

5 terms

Business Combination Warrants financial

"Entity sold 13 Business Combination Warrants at $1.80 each."

reverse stock split financial

"Arqit announced a reverse stock split consolidating every 25 shares into one."

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 615,597 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.

exercise price financial

"Each Business Combination Warrant has an exercise price of $11.50."

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.

aggregate exercise price financial

"25 warrants are required for one share at an aggregate exercise price of $287.50."

FAQ

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

What insider transaction did Arqit Quantum Inc. (ARQQ) disclose in this Form 4?

Arqit Quantum Inc. disclosed that an entity associated with director Lefebvre d'Ovidio Manfredi sold 13 Business Combination Warrants in an open-market sale at $1.80 per warrant, while retaining a much larger remaining warrant position.

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

The filing reports the sale of 13 Business Combination Warrants at a price of $1.80 per warrant. This is a very small portion of the reporting person’s overall warrant holdings disclosed in the same document.

How many Arqit (ARQQ) Business Combination Warrants does the reporting person still hold?

After the reported sale, the reporting person beneficially owns 615,597 Business Combination Warrants. If exercised in full, these warrants would be equivalent to 24,623.88 Arqit ordinary shares on a post-reverse stock split basis.

What are the key terms of Arqit (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. Holders must exercise at least 25 warrants to receive one whole ordinary share at an aggregate exercise price of $287.50.

How does Arqit’s reverse stock split affect these Business Combination Warrants?

Following a 25-for-1 reverse stock split of Arqit ordinary shares, each Business Combination Warrant now entitles the holder to 0.04 of a post-split share. As a result, 25 warrants are needed to receive one whole ordinary share under the new structure.

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

The warrants involved in this transaction expire on September 3, 2026. Until that date, holders may elect to exercise them at $11.50 per warrant, subject to the minimum of 25 warrants for each whole ordinary share received.

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

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Accepted by SEC EDGAR 05/13/2026 - 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 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)
05/12/2026

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)	05/12/2026		S			13	(1)	09/03/2026	Ordinary Shares	13	$1.8	24,623.88	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 615,597 Business Combination Warrants, which, if exercised in full, would be equivalent to 24,623.88 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	05/13/2026
	** 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)