ARQQ: Ritchie Garth sold $3K of stock

By AlphaYouPublished Oct 8, 2026Form 4

Stocks in this disclosure

Reported activity

Ritchie Garth

Reporting filer

Ritchie Garth reported selling 127 shares of Arqit Quantum Inc. for about $3K ($23.78 a share on average). Form 4 filed Oct 7, 2026 lists 9 entries.

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Disclosed: Oct 7, 2026

Reported details

9 entries

All validated entries in this disclosure
Security	Owner	Date	Code	Action	Quantity	Price	Following holdings	Reporting delay	Filed terms and references
Ordinary Shares	Ritchie Garth	2026-10-05	M	Exercise or conversion	16	0	105,847	2 days	Filed terms security Title: Ordinary Shares transaction Date: 2026-10-05 transaction Form Type: 4 transaction Code: M equity Swap Involved: 0 transaction Timeliness: transaction Shares: 16 transaction Price Per Share: 0 id: F1 transaction Acquired Disposed Code: A shares Owned Following Transaction: 105847 direct Or Indirect Ownership: D
Ordinary Shares	Ritchie Garth	2026-10-05	M	Exercise or conversion	66	0	105,913	2 days	Filed terms security Title: Ordinary Shares transaction Date: 2026-10-05 transaction Form Type: 4 transaction Code: M equity Swap Involved: 0 transaction Timeliness: transaction Shares: 66 transaction Price Per Share: 0 id: F1 transaction Acquired Disposed Code: A shares Owned Following Transaction: 105913 direct Or Indirect Ownership: D
Ordinary Shares	Ritchie Garth	2026-10-05	M	Exercise or conversion	83	0	105,996	2 days	Filed terms security Title: Ordinary Shares transaction Date: 2026-10-05 transaction Form Type: 4 transaction Code: M equity Swap Involved: 0 transaction Timeliness: transaction Shares: 83 transaction Price Per Share: 0 id: F1 transaction Acquired Disposed Code: A shares Owned Following Transaction: 105996 direct Or Indirect Ownership: D
Ordinary Shares	Ritchie Garth	2026-10-05	M	Exercise or conversion	83	0	106,079	2 days	Filed terms security Title: Ordinary Shares transaction Date: 2026-10-05 transaction Form Type: 4 transaction Code: M equity Swap Involved: 0 transaction Timeliness: transaction Shares: 83 transaction Price Per Share: 0 id: F1 transaction Acquired Disposed Code: A shares Owned Following Transaction: 106079 direct Or Indirect Ownership: D
Ordinary Shares	Ritchie Garth	2026-10-05	S	Sale	127	23.7847	105,952	2 days	Filed terms security Title: Ordinary Shares transaction Date: 2026-10-05 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 transaction Timeliness: transaction Shares: 127 transaction Price Per Share: 23.7847 transaction Acquired Disposed Code: D shares Owned Following Transaction: 105952 direct Or Indirect Ownership: D
Restricted Share Units (derivative)	Ritchie Garth	2026-10-05	M	Exercise or conversion	16	0	816	2 days	Filed terms security Title: Restricted Share Units id: F2 transaction Date: 2026-10-05 transaction Form Type: 4 transaction Code: M equity Swap Involved: 0 transaction Timeliness: transaction Shares: 16 transaction Price Per Share: 0 transaction Acquired Disposed Code: D id: F2 id: F2 underlying Security Title: Ordinary Shares underlying Security Shares: 16 shares Owned Following Transaction: 816 direct Or Indirect Ownership: D
Restricted Share Units (derivative)	Ritchie Garth	2026-10-05	M	Exercise or conversion	66	0	750	2 days	Filed terms security Title: Restricted Share Units id: F2 transaction Date: 2026-10-05 transaction Form Type: 4 transaction Code: M equity Swap Involved: 0 transaction Timeliness: transaction Shares: 66 transaction Price Per Share: 0 transaction Acquired Disposed Code: D id: F2 id: F2 underlying Security Title: Ordinary Shares underlying Security Shares: 66 shares Owned Following Transaction: 750 direct Or Indirect Ownership: D
Restricted Share Units (derivative)	Ritchie Garth	2026-10-05	M	Exercise or conversion	83	0	1,001	2 days	Filed terms security Title: Restricted Share Units id: F3 transaction Date: 2026-10-05 transaction Form Type: 4 transaction Code: M equity Swap Involved: 0 transaction Timeliness: transaction Shares: 83 transaction Price Per Share: 0 transaction Acquired Disposed Code: D id: F3 id: F3 underlying Security Title: Ordinary Shares underlying Security Shares: 83 shares Owned Following Transaction: 1001 direct Or Indirect Ownership: D
Restricted Share Units (derivative)	Ritchie Garth	2026-10-05	M	Exercise or conversion	83	0	2,000	2 days	Filed terms security Title: Restricted Share Units id: F4 transaction Date: 2026-10-05 transaction Form Type: 4 transaction Code: M equity Swap Involved: 0 transaction Timeliness: transaction Shares: 83 transaction Price Per Share: 0 transaction Acquired Disposed Code: D id: F4 id: F4 underlying Security Title: Ordinary Shares underlying Security Shares: 83 shares Owned Following Transaction: 2000 direct Or Indirect Ownership: D

Ordinary Shares

Owner: Ritchie Garth
Date: 2026-10-05
Code: M
Action: Exercise or conversion
Quantity: 16
Price: 0
Following holdings: 105,847
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Ordinary Shares
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 16
transaction Price Per Share: 0
id: F1
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 105847
direct Or Indirect Ownership: D

Ordinary Shares

Owner: Ritchie Garth
Date: 2026-10-05
Code: M
Action: Exercise or conversion
Quantity: 66
Price: 0
Following holdings: 105,913
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Ordinary Shares
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 66
transaction Price Per Share: 0
id: F1
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 105913
direct Or Indirect Ownership: D

Ordinary Shares

Owner: Ritchie Garth
Date: 2026-10-05
Code: M
Action: Exercise or conversion
Quantity: 83
Price: 0
Following holdings: 105,996
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Ordinary Shares
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 83
transaction Price Per Share: 0
id: F1
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 105996
direct Or Indirect Ownership: D

Ordinary Shares

Owner: Ritchie Garth
Date: 2026-10-05
Code: M
Action: Exercise or conversion
Quantity: 83
Price: 0
Following holdings: 106,079
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Ordinary Shares
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 83
transaction Price Per Share: 0
id: F1
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 106079
direct Or Indirect Ownership: D

Ordinary Shares

Owner: Ritchie Garth
Date: 2026-10-05
Code: S
Action: Sale
Quantity: 127
Price: 23.7847
Following holdings: 105,952
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Ordinary Shares
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 127
transaction Price Per Share: 23.7847
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 105952
direct Or Indirect Ownership: D

Restricted Share Units (derivative)

Owner: Ritchie Garth
Date: 2026-10-05
Code: M
Action: Exercise or conversion
Quantity: 16
Price: 0
Following holdings: 816
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Restricted Share Units
id: F2
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 16
transaction Price Per Share: 0
transaction Acquired Disposed Code: D
id: F2
id: F2
underlying Security Title: Ordinary Shares
underlying Security Shares: 16
shares Owned Following Transaction: 816
direct Or Indirect Ownership: D

Restricted Share Units (derivative)

Owner: Ritchie Garth
Date: 2026-10-05
Code: M
Action: Exercise or conversion
Quantity: 66
Price: 0
Following holdings: 750
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Restricted Share Units
id: F2
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 66
transaction Price Per Share: 0
transaction Acquired Disposed Code: D
id: F2
id: F2
underlying Security Title: Ordinary Shares
underlying Security Shares: 66
shares Owned Following Transaction: 750
direct Or Indirect Ownership: D

Restricted Share Units (derivative)

Owner: Ritchie Garth
Date: 2026-10-05
Code: M
Action: Exercise or conversion
Quantity: 83
Price: 0
Following holdings: 1,001
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Restricted Share Units
id: F3
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 83
transaction Price Per Share: 0
transaction Acquired Disposed Code: D
id: F3
id: F3
underlying Security Title: Ordinary Shares
underlying Security Shares: 83
shares Owned Following Transaction: 1001
direct Or Indirect Ownership: D

Restricted Share Units (derivative)

Owner: Ritchie Garth
Date: 2026-10-05
Code: M
Action: Exercise or conversion
Quantity: 83
Price: 0
Following holdings: 2,000
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Restricted Share Units
id: F4
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 83
transaction Price Per Share: 0
transaction Acquired Disposed Code: D
id: F4
id: F4
underlying Security Title: Ordinary Shares
underlying Security Shares: 83
shares Owned Following Transaction: 2000
direct Or Indirect Ownership: D

Purchases, sales, grants and option exercises are different transactions. The reported code identifies the action; it does not establish a motive.

Filing context

Quantities and prices are shown in the units filed. No trade value is inferred from their product.
Ritchie Garth: Director.
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.

Original sources

SEC ownership filing

Prepared automatically from public filing data. Report a correction.

Security

Owner

Date

Code

Action

Quantity

Price

Following holdings

Reporting delay

Filed terms and references

Ordinary Shares

Ritchie Garth

2026-10-05

Exercise or conversion

105,847

2 days

Filed terms

security Title: Ordinary Shares
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 16
transaction Price Per Share: 0
id: F1
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 105847
direct Or Indirect Ownership: D

Ordinary Shares

Ritchie Garth

2026-10-05

Exercise or conversion

105,913

2 days

Filed terms

security Title: Ordinary Shares
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 66
transaction Price Per Share: 0
id: F1
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 105913
direct Or Indirect Ownership: D

Ordinary Shares

Ritchie Garth

2026-10-05

Exercise or conversion

105,996

2 days

Filed terms

security Title: Ordinary Shares
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 83
transaction Price Per Share: 0
id: F1
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 105996
direct Or Indirect Ownership: D

Ordinary Shares

Ritchie Garth

2026-10-05

Exercise or conversion

106,079

2 days

Filed terms

security Title: Ordinary Shares
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 83
transaction Price Per Share: 0
id: F1
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 106079
direct Or Indirect Ownership: D

Ordinary Shares

Ritchie Garth

2026-10-05

Sale

127

23.7847

105,952

2 days

Filed terms

security Title: Ordinary Shares
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 127
transaction Price Per Share: 23.7847
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 105952
direct Or Indirect Ownership: D

Restricted Share Units (derivative)

Ritchie Garth

2026-10-05

Exercise or conversion

816

2 days

Filed terms

security Title: Restricted Share Units
id: F2
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 16
transaction Price Per Share: 0
transaction Acquired Disposed Code: D
id: F2
id: F2
underlying Security Title: Ordinary Shares
underlying Security Shares: 16
shares Owned Following Transaction: 816
direct Or Indirect Ownership: D

Restricted Share Units (derivative)

Ritchie Garth

2026-10-05

Exercise or conversion

750

2 days

Filed terms

security Title: Restricted Share Units
id: F2
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 66
transaction Price Per Share: 0
transaction Acquired Disposed Code: D
id: F2
id: F2
underlying Security Title: Ordinary Shares
underlying Security Shares: 66
shares Owned Following Transaction: 750
direct Or Indirect Ownership: D

Restricted Share Units (derivative)

Ritchie Garth

2026-10-05

Exercise or conversion

1,001

2 days

Filed terms

security Title: Restricted Share Units
id: F3
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 83
transaction Price Per Share: 0
transaction Acquired Disposed Code: D
id: F3
id: F3
underlying Security Title: Ordinary Shares
underlying Security Shares: 83
shares Owned Following Transaction: 1001
direct Or Indirect Ownership: D

Restricted Share Units (derivative)

Ritchie Garth

2026-10-05

Exercise or conversion

2,000

2 days

Filed terms

security Title: Restricted Share Units
id: F4
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 83
transaction Price Per Share: 0
transaction Acquired Disposed Code: D
id: F4
id: F4
underlying Security Title: Ordinary Shares
underlying Security Shares: 83
shares Owned Following Transaction: 2000
direct Or Indirect Ownership: D

Filing context

Quantities and prices are shown in the units filed. No trade value is inferred from their product.

Ritchie Garth: Director.

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.