Richard Ian Griffiths

CIK: 0001846370

Transaction Breakdown

Open Market Buys (P)63 (76.8%)

High conviction signal

Open Market Sales (S)19 (23.2%)

Position reduction

Option Exercises (M)0 (0.0%)

Derivative conversions

Awards (A)0 (0.0%)

Compensation grants

Other (G, F, J, C, D, …)0 (0.0%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

SLN

Silence Therapeutics plc

10% Owner

Discretionary Trading P&L

Holdings

Transaction History (82 total)

SLN
Silence Therapeutics plc
Aug 10, 2026
Sale(S)
American Depositary Shares
Indirect
50K shares-
SLN
Silence Therapeutics plc
Aug 10, 2026
Sale(S)
American Depositary Shares
Indirect
382K shares-
SLN
Silence Therapeutics plc
Aug 10, 2026
Sale(S)
American Depositary Shares
Indirect
100K shares-
SLN
Silence Therapeutics plc
Aug 10, 2026
Sale(S)
American Depositary Shares
Indirect
470.8K shares-
SLN
Silence Therapeutics plc
Aug 10, 2026
Sale(S)
American Depositary Shares
Indirect
800K shares-
SLN
Silence Therapeutics plc
Aug 10, 2026
Sale(S)
American Depositary Shares
Indirect
120K shares-
SLN
Silence Therapeutics plc
Aug 10, 2026
Sale(S)
American Depositary Shares
Indirect
2.8M shares-
SLN
Silence Therapeutics plc
Aug 10, 2026
Sale(S)
American Depositary Shares
Indirect
605.2K shares-
SLN
Silence Therapeutics plc
Aug 10, 2026
Sale(S)
American Depositary Shares
Indirect
60K shares-
SLN
Silence Therapeutics plc
Aug 10, 2026
Sale(S)
American Depositary Shares
Indirect
3.5K shares-
SLN
Silence Therapeutics plc
Aug 10, 2026
Sale(S)
American Depositary Shares
Indirect
100K shares-
SLN
Silence Therapeutics plc
Jul 6, 2026
Sale(S)
American Depositary Shares
Indirect
865.1K shares-
SLN
Silence Therapeutics plc
Jul 2, 2026
Sale(S)
American Depositary Shares
Indirect
50.1K shares-
SLN
Silence Therapeutics plc
Jul 1, 2026
Sale(S)
American Depositary Shares
Indirect
79.2K shares-
SLN
Silence Therapeutics plc
Jul 1, 2026
Sale(S)
American Depositary Shares
Indirect
50K shares-
SLN
Silence Therapeutics plc
Jun 30, 2026
Sale(S)
American Depositary Shares
Indirect
169.9K shares-
SLN
Silence Therapeutics plc
Jun 29, 2026
Sale(S)
American Depositary Shares
Indirect
330.1K shares-
SLN
Silence Therapeutics plc
Oct 27, 2025
Sale(S)
American Depositary Shares
Indirect
2K shares-
SLN
Silence Therapeutics plc
Oct 27, 2025
Purchase(P)
American Depositary Shares
Indirect
2K shares-
SLN
Silence Therapeutics plc
Aug 3, 2025
Sale(S)
American Depositary Shares
Indirect
20K shares-
SLN
Silence Therapeutics plc
Aug 3, 2025
Purchase(P)
American Depositary Shares
Indirect
20K shares-
SLN
Silence Therapeutics plc
Aug 1, 2025
Purchase(P)
American Depositary Shares
Indirect
4K shares-
SLN
Silence Therapeutics plc
Jul 31, 2025
Purchase(P)
American Depositary Shares
Indirect
14.3K shares-
SLN
Silence Therapeutics plc
Jul 30, 2025
Purchase(P)
American Depositary Shares
Indirect
8.9K shares-
SLN
Silence Therapeutics plc
Jul 29, 2025
Purchase(P)
American Depositary Shares
Indirect
14.6K shares-

		Type	Shares	Price		Ownership
Aug 10, 2026	SLN Silence Therapeutics plc	Sale(S) American Depositary Shares	50,000	-	-	Indirect
Aug 10, 2026	SLN Silence Therapeutics plc	Sale(S) American Depositary Shares	382,000	-	-	Indirect
Aug 10, 2026	SLN Silence Therapeutics plc	Sale(S) American Depositary Shares	100,000	-	-	Indirect
Aug 10, 2026	SLN Silence Therapeutics plc	Sale(S) American Depositary Shares	470,820	-	-	Indirect
Aug 10, 2026	SLN Silence Therapeutics plc	Sale(S) American Depositary Shares	800,000	-	-	Indirect
Aug 10, 2026	SLN Silence Therapeutics plc	Sale(S) American Depositary Shares	120,000	-	-	Indirect
Aug 10, 2026	SLN Silence Therapeutics plc	Sale(S) American Depositary Shares	2,792,826	-	-	Indirect
Aug 10, 2026	SLN Silence Therapeutics plc	Sale(S) American Depositary Shares	605,174	-	-	Indirect
Aug 10, 2026	SLN Silence Therapeutics plc	Sale(S) American Depositary Shares	60,000	-	-	Indirect
Aug 10, 2026	SLN Silence Therapeutics plc	Sale(S) American Depositary Shares	3,500	-	-	Indirect
Aug 10, 2026	SLN Silence Therapeutics plc	Sale(S) American Depositary Shares	100,000	-	-	Indirect
Jul 6, 2026	SLN Silence Therapeutics plc	Sale(S) American Depositary Shares	865,112	-	-	Indirect
Jul 2, 2026	SLN Silence Therapeutics plc	Sale(S) American Depositary Shares	50,082	-	-	Indirect
Jul 1, 2026	SLN Silence Therapeutics plc	Sale(S) American Depositary Shares	79,180	-	-	Indirect
Jul 1, 2026	SLN Silence Therapeutics plc	Sale(S) American Depositary Shares	50,000	-	-	Indirect
Jun 30, 2026	SLN Silence Therapeutics plc	Sale(S) American Depositary Shares	169,928	-	-	Indirect
Jun 29, 2026	SLN Silence Therapeutics plc	Sale(S) American Depositary Shares	330,072	-	-	Indirect
Oct 27, 2025	SLN Silence Therapeutics plc	Sale(S) American Depositary Shares	2,000	-	-	Indirect
Oct 27, 2025	SLN Silence Therapeutics plc	Purchase(P) American Depositary Shares	2,000	-	-	Indirect
Aug 3, 2025	SLN Silence Therapeutics plc	Sale(S) American Depositary Shares	20,000	-	-	Indirect
Aug 3, 2025	SLN Silence Therapeutics plc	Purchase(P) American Depositary Shares	20,000	-	-	Indirect
Aug 1, 2025	SLN Silence Therapeutics plc	Purchase(P) American Depositary Shares	4,034	-	-	Indirect
Jul 31, 2025	SLN Silence Therapeutics plc	Purchase(P) American Depositary Shares	14,342	-	-	Indirect
Jul 30, 2025	SLN Silence Therapeutics plc	Purchase(P) American Depositary Shares	8,923	-	-	Indirect
Jul 29, 2025	SLN Silence Therapeutics plc	Purchase(P) American Depositary Shares	14,559	-	-	Indirect

1-25 of 82 transactions

About Griffiths Richard Ian

Griffiths Richard Ian (SEC CIK 0001846370) files insider reports with the SEC as 10% Owner of Silence Therapeutics plc (SLN).

Signal8 holds 28 ownership filings by Griffiths Richard Ian (1 Form 3, 27 Form 4), filed between Jan 2, 2025 and Aug 13, 2026. Those filings report 82 transactions, from Jan 8, 2025 to Aug 10, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Griffiths Richard Ian's filings is in ST HELIER.

Recent filings by Griffiths Richard Ian

Aug 10, 2026: Open-market sales of SLN derivative securities (11 lines, Form 4, code S).
Jul 6, 2026: Open-market sale of SLN derivative securities (Form 4, code S).
Jul 2, 2026: Open-market sale of SLN derivative securities (Form 4, code S).
Jul 1, 2026: Open-market sales of SLN derivative securities (2 lines, Form 4, code S).
Jun 30, 2026: Open-market sale of SLN derivative securities (Form 4, code S).

Other insiders filing for Silence Therapeutics plc (SLN)

Ede-Golightly James, Director
MCINERNEY TIMOTHY, Director
Romano Steven J., EVP and Chief R&D Officer
HELLUMS RHONDA LYNETTE, Chief Financial Officer
Lemus David, Director
Ross Iain, Director

How to read Form 4 transaction codes