How many ARQQ restricted share units were converted?

The director reported conversion of 1,364 restricted share units on October 1, 2026. The RSUs convert into ordinary shares on a one-for-one basis; the corresponding ordinary-share entries report $0.00 per share.

Arqit Quantum director converts grants to 1,364 shares

Q: How many ARQQ ordinary shares were held indirectly?

The reported indirect holding was 4,396,891 ordinary shares through Heritage Assets SCSP.

The director’s RSU footnotes describe quarterly vesting schedules through October 1, 2028; the reported indirect position is held through Heritage Assets SCSP.

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)How Sentiment works

Sentiment and the balance of points

Rhea-AI Sentiment reads the wording of the document, how positive or negative its language is on a 1 to 5 scale. The balance of points shown with the takes weighs what the document actually discloses, so the two can disagree, for example when a trial that missed its main goal is described in upbeat language.

How Sentiment works How the balance works

Form Type

Rhea-AI Filing Summary

Arqit Quantum Inc. (ARQQ) director d'Ovidio Manfredi Lefebvre reported conversion of 1,364 restricted share units into ordinary shares on October 1, 2026; the units convert on a one-for-one basis. The five RSU and ordinary-share entries were 1,112, 17, 67, 84 and 84 shares, and the ordinary-share entries report $0.00 per share. Separately, he reported 4,396,891 ordinary shares held indirectly through Heritage Assets SCSP. The RSUs have quarterly vesting schedules extending through October 1, 2028.

Insider Trade Summary

1,364 shares exercised/converted

Exercise 11 txns

Insider Lefebvre d'Ovidio Manfredi

Role Director

Type	Security	Shares	Price	Value
Exercise	Restricted Share Units ^{F2, F1}	1,112	--	--
Exercise	Restricted Share Units ^{F2, F1}	17	--	--
Exercise	Restricted Share Units ^{F2, F1}	67	--	--
Exercise	Restricted Share Units ^{F3, F1}	84	--	--
Exercise	Restricted Share Units ^{F4, F1}	84	--	--
Exercise	Ordinary Shares ^F1	1,112	$0.00	$0.00
Exercise	Ordinary Shares ^F1	17	$0.00	$0.00
Exercise	Ordinary Shares ^F1	67	$0.00	$0.00
Exercise	Ordinary Shares ^F1	84	$0.00	$0.00
Exercise	Ordinary Shares ^F1	84	$0.00	$0.00
holding	Ordinary Shares	--	--	--

Holdings After Transaction: Restricted Share Units — 16,465 contracts (Direct); Ordinary Shares — 50,387 shares (Direct); Ordinary Shares — 4,396,891 shares (Indirect, beneficially owned through Heritage Assets SCSP)

Footnotes (4)

F1. The Restricted Share Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis.
F2. The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, and July 1, 2027.
F3. The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, July 1, and October 1, 2027.
F4. The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, July 1, and October 1, 2027, and January 1, April 1, July 1, and October 1, 2028.

Key Figures

Restricted share units converted: 1,364 RSUs RSU tranche: 1,112 RSUs RSU tranche: 17 RSUs +3 more

6 metrics

Restricted share units converted 1,364 RSUs October 1, 2026

RSU tranche 1,112 RSUs October 1, 2026

RSU tranche 17 RSUs October 1, 2026

RSU tranche 67 RSUs October 1, 2026

RSU tranche 84 RSUs October 1, 2026

Indirect ordinary-share holding 4,396,891 ordinary shares Held through Heritage Assets SCSP

Key Terms

Restricted Share Units, one-for-one basis, vest quarterly in equal installments, beneficially owned

4 terms

one-for-one basis technical

"convert into ARQQ ordinary shares on a one-for-one basis"

vest quarterly in equal installments technical

"The RSUs vest quarterly in equal installments"

beneficially owned financial

"beneficially owned through Heritage Assets SCSP"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

FAQ

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

How many ARQQ ordinary shares were held indirectly?

The reported indirect holding was 4,396,891 ordinary shares through Heritage Assets SCSP.

What is the vesting schedule for the reported ARQQ RSUs?

The RSU footnotes describe quarterly equal installments. One schedule lists October 1, 2026, then January 1, April 1 and July 1, 2027; another continues through October 1, 2027; the longest continues on January 1, April 1, July 1 and October 1, 2028.

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

Form 4 Insider Transactions: What Each Field Means →

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google

Available on EDGAR 10/05/2026 - 08:27 PM Accepted by SEC EDGAR 10/05/2026 - 08:26 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)
10/01/2026

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)
Ordinary Shares	10/01/2026		M		1,112	A	$0⁽¹⁾	50,135	D
Ordinary Shares	10/01/2026		M		17	A	$0⁽¹⁾	50,152	D
Ordinary Shares	10/01/2026		M		67	A	$0⁽¹⁾	50,219	D
Ordinary Shares	10/01/2026		M		84	A	$0⁽¹⁾	50,303	D
Ordinary Shares	10/01/2026		M		84	A	$0⁽¹⁾	50,387	D
Ordinary Shares								4,396,891	I	beneficially owned through Heritage Assets SCSP

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)
Restricted Share Units	⁽²⁾	10/01/2026		M			1,112	⁽²⁾	⁽²⁾	Ordinary Shares	1,112	⁽¹⁾	13,216	D
Restricted Share Units	⁽²⁾	10/01/2026		M			17	⁽²⁾	⁽²⁾	Ordinary Shares	17	⁽¹⁾	13,199	D
Restricted Share Units	⁽²⁾	10/01/2026		M			67	⁽²⁾	⁽²⁾	Ordinary Shares	67	⁽¹⁾	13,132	D
Restricted Share Units	⁽³⁾	10/01/2026		M			84	⁽³⁾	⁽³⁾	Ordinary Shares	84	⁽¹⁾	1,167	D
Restricted Share Units	⁽⁴⁾	10/01/2026		M			84	⁽⁴⁾	⁽⁴⁾	Ordinary Shares	84	⁽¹⁾	2,166	D

Explanation of Responses:

1. The Restricted Share Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis.

2. The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, and July 1, 2027.

3. The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, July 1, and October 1, 2027.

4. The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, July 1, and October 1, 2027, and January 1, April 1, July 1, and October 1, 2028.

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. Ex.24 - Power of Attorney.

	/s/ Noleen McDonnell, as Attorney-in-Fact	10/05/2026
	** 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