Richard Ian Griffiths - 10 Aug 2026 Form 4 Insider Report for Silence Therapeutics plc (SLN)

Reporting relationship: 10%+ Owner
Issuer ticker: SLN
Reported as of: 10 Aug 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 13 Aug 2026, 10:07:24 UTC
Prior SEC filing: 07 Jul 2026
Source filing: View source filing
Reporting owner signature: /s/ Richard Ian Griffiths

Key filing fact

Richard Ian Griffiths filed Form 4 for Silence Therapeutics plc (SLN) on 13 Aug 2026.

Key facts

This page summarizes Richard Ian Griffiths's Form 4 filing for Silence Therapeutics plc (SLN).
11 reported transactions and 11 derivative rows are listed below.
Accepted by SEC: 13 Aug 2026, 10:07.

Change

Previous filing in this sequence was filed on 07 Jul 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001846370 Primary reporting owner

Griffiths Richard Ian

Relationship: 10%+ Owner
Address: ST HELIER, JERSEY
Signature: /s/ Richard Ian Griffiths
Signature date: 13 Aug 2026

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

SLN transaction Derivative

American Depositary Shares

Sale

Transaction value
Shares: +2,792,826
Change %: +59%
Price
Shares after: 7,488,660
Date: 10 Aug 2026
Ownership: See footnote
Underlying class: Ordinary Shares
Underlying amount: 8,378,478
Exercise price: $16.00
Footnotes: F1, F2

SLN transaction Derivative

American Depositary Shares

Sale

Transaction value
Shares: +100,000
Change %: +1.4%
Price
Shares after: 7,388,660
Date: 10 Aug 2026
Ownership: See footnote
Underlying class: Ordinary Shares
Underlying amount: 300,000
Exercise price: $15.58
Footnotes: F1, F2

SLN transaction Derivative

American Depositary Shares

Sale

Transaction value
Shares: +50,000
Change %: +0.69%
Price
Shares after: 7,338,660
Date: 10 Aug 2026
Ownership: See footnote
Underlying class: Ordinary Shares
Underlying amount: 150,000
Exercise price: $16.09
Footnotes: F1, F2

SLN transaction Derivative

American Depositary Shares

Sale

Transaction value
Shares: +3,500
Change %: +0.05%
Price
Shares after: 7,335,160
Date: 10 Aug 2026
Ownership: See footnote
Underlying class: Ordinary Shares
Underlying amount: 10,500
Exercise price: $16.35
Footnotes: F1, F2

SLN transaction Derivative

American Depositary Shares

Sale

Transaction value
Shares: +800,000
Change %: +14%
Price
Shares after: 6,535,160
Date: 10 Aug 2026
Ownership: See footnote
Underlying class: Ordinary Shares
Underlying amount: 2,400,000
Exercise price: $16.00
Footnotes: F1, F2

SLN transaction Derivative

American Depositary Shares

Sale

Transaction value
Shares: +382,000
Change %: +6.6%
Price
Shares after: 6,153,160
Date: 10 Aug 2026
Ownership: See footnote
Underlying class: Ordinary Shares
Underlying amount: 1,146,000
Exercise price: $16.00
Footnotes: F1, F2

SLN transaction Derivative

American Depositary Shares

Sale

Transaction value
Shares: +470,820
Change %: +9%
Price
Shares after: 5,682,340
Date: 10 Aug 2026
Ownership: See footnote
Underlying class: Ordinary Shares
Underlying amount: 1,412,460
Exercise price: $16.09
Footnotes: F1, F2

SLN transaction Derivative

American Depositary Shares

Sale

Transaction value
Shares: +605,174
Change %: +14%
Price
Shares after: 5,077,166
Date: 10 Aug 2026
Ownership: See footnote
Underlying class: Ordinary Shares
Underlying amount: 1,815,522
Exercise price: $16.00
Footnotes: F1, F2

SLN transaction Derivative

American Depositary Shares

Sale

Transaction value
Shares: +120,000
Change %: +2.5%
Price
Shares after: 4,957,166
Date: 10 Aug 2026
Ownership: See footnote
Underlying class: Ordinary Shares
Underlying amount: 360,000
Exercise price: $16.00
Footnotes: F1, F2

SLN transaction Derivative

American Depositary Shares

Sale

Transaction value
Shares: +60,000
Change %: +1.2%
Price
Shares after: 4,897,166
Date: 10 Aug 2026
Ownership: See footnote
Underlying class: Ordinary Shares
Underlying amount: 180,000
Exercise price: $16.35
Footnotes: F1, F2

SLN transaction Derivative

American Depositary Shares

Sale

Transaction value
Shares: +100,000
Change %: +2.1%
Price
Shares after: 4,797,166
Date: 10 Aug 2026
Ownership: See footnote
Underlying class: Ordinary Shares
Underlying amount: 300,000
Exercise price: $16.00
Footnotes: F1, F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

Each American Depositary Share ("ADS") is immediately convertible into three ordinary shares for no consideration and has no expiration date.

Footnote F2

The securities were sold by Cream Capital Limited ("CCL"), Blake Holdings Limited ("BHL"), Ora Ventures Limited ("OVL"), Ora Capital Limited ("OCL), Sarossa Plc ("SAR"), Pinkeys Limited ("PKL") and Mr. Griffiths personally. Mr Griffiths is a director and the controlling shareholder of CCL, BHL, OVL and OCL and the controlling shareholder of SAR and PKL. Mr. Griffiths disclaims beneficial ownership of these securities except to the extent of his proportionate pecuniary interest therein.