Silence Therapeutics plc (SLN) Insider Trading

Over the last 3 months, SLN insiders made 0 open-market buys and 6 sales, a net sale of -$16.4M (SEC Form 4). Over the last 6 months, 42 institutions increased and 28 reduced their position (13F).

Insider Activity

Sentiment
0/100
Buys (3m)
0
Sells (3m)
6
Net (3m)
-$16.4M
Insider trades by month Buys Sells
May
Jun
Jul
Aug
Feb
Jul
Context3-month price +73.5%Institutions accumulating (13F)
DateInsiderTypeSharesPrice
Jul 7, 2026Griffiths Richard Ian10 percent ownerSell79,180$10.62
Jul 7, 2026Griffiths Richard Ian10 percent ownerSell50,082$10.47
Jul 7, 2026Griffiths Richard Ian10 percent ownerSell865,112$10.53
Jul 7, 2026Griffiths Richard Ian10 percent ownerSell169,928$10.76
Jul 7, 2026Griffiths Richard Ian10 percent ownerSell330,072$10.69
Jul 7, 2026Griffiths Richard Ian10 percent ownerSell50,000$10.62
Feb 13, 2026Griffiths Richard Ian10 percent ownerSell2,000$7.75
Feb 13, 2026Griffiths Richard Ian10 percent ownerBuy20,000$5.45
Feb 13, 2026Griffiths Richard Ian10 percent ownerBuy2,000$7.75
Feb 13, 2026Griffiths Richard Ian10 percent ownerSell20,000$5.45
Jan 6, 2026MCINERNEY TIMOTHYdirectorGrant90,000$2.05
Jan 6, 2026Ede-Golightly JamesdirectorGrant90,000$2.05
Jan 6, 2026Romano Steven J.officer: EVP and Chief R&D OfficerGrant300,000$2.05
Jan 6, 2026HELLUMS RHONDA LYNETTEdirector, officer: Chief Financial OfficerGrant375,000$2.05
Jan 6, 2026Lemus DaviddirectorGrant90,000$2.05
Dec 22, 2025Ross Iaindirector, officer: Interim PEOGrant900,000$2.08
Dec 22, 2025Ede-Golightly JamesdirectorGrant90,000$2.15
Aug 4, 2025Griffiths Richard Ian10 percent ownerBuy4,034$6.14
Aug 4, 2025Griffiths Richard Ian10 percent ownerBuy14,342$6.18
Jul 31, 2025Griffiths Richard Ian10 percent ownerBuy8,923$6.14
Jul 31, 2025Griffiths Richard Ian10 percent ownerBuy14,559$6.20
Jul 23, 2025Griffiths Richard Ian10 percent ownerBuy2,910$6.09
Jul 23, 2025Griffiths Richard Ian10 percent ownerBuy22,435$6.04
Jul 16, 2025Griffiths Richard Ian10 percent ownerBuy43,293$6.40
Jul 16, 2025Griffiths Richard Ian10 percent ownerBuy28,000$6.43
Jul 10, 2025Griffiths Richard Ian10 percent ownerBuy24,387$5.94
Jul 10, 2025Griffiths Richard Ian10 percent ownerBuy7,937$5.65
Jul 10, 2025Griffiths Richard Ian10 percent ownerBuy30,133$6.00
Jun 30, 2025Griffiths Richard Ian10 percent ownerBuy20,735$5.67
Jun 30, 2025Griffiths Richard Ian10 percent ownerBuy65,739$5.91

Source: SLN SEC Form 4 filings, latest Jul 7, 2026. For informational purposes only — not investment advice.

Institutional activity (13F)

How institutions changed their SLN positions over the last 6 months (SEC Form 13F).

Increased
42
New positions
19
Reduced
28
Sold out
19
Largest moves
InstitutionActionSharesFiled
TCG CROSSOVER MANAGEMENT, LLCUnchanged3.0MFeb 17, 2026
TCG CROSSOVER MANAGEMENT, LLCUnchanged3.0MMay 15, 2026
SIREN, L.L.C.Unchanged2.9MFeb 13, 2026
SIREN, L.L.C.Unchanged2.9MMay 14, 2026
REDMILE GROUP, LLCUnchanged2.2MFeb 17, 2026
REDMILE GROUP, LLCUnchanged2.2MMay 15, 2026
NANTAHALA CAPITAL MANAGEMENT, LLCIncreased2.1MMay 15, 2026
NANTAHALA CAPITAL MANAGEMENT, LLCIncreased1.5MFeb 13, 2026
CITADEL ADVISORS LLCIncreased1.2MMay 15, 2026
VIVO CAPITAL, LLCUnchanged1.1MFeb 13, 2026
MILLENNIUM MANAGEMENT LLCIncreased1.1MMay 15, 2026
GREAT POINT PARTNERS LLCIncreased1.0MMay 15, 2026
NEXTECH INVEST, LTD.Unchanged952KFeb 17, 2026
NEXTECH INVEST, LTD.Unchanged952KMay 15, 2026
IKARIAN CAPITAL, LLCUnchanged866KMay 15, 2026

Source: SEC Form 13F filings. For informational purposes only — not investment advice.