Welcome to our dedicated page for Silence Therapeutics Plc SEC filings (Ticker: SLN), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
Silence Therapeutics plc filings document a foreign biotechnology issuer whose American Depositary Shares trade on Nasdaq under SLN, with each ADS representing three ordinary shares. The record includes 8-K reports furnishing quarterly and annual financial results, business highlights, Regulation FD presentations and other events tied to siRNA pipeline development.
The company’s disclosures also cover proxy materials for shareholder voting and governance, board composition, executive departures and appointments, committee changes, and the relationship between listed ADSs and ordinary shares. Clinical and business exhibits describe programs from the mRNAi GOLD platform, including SANRECO updates for divesiran in polycythemia vera and collaboration-related disclosures involving AstraZeneca.
Silence Therapeutics plc (SLN) – Form 4 insider transaction. 10% owner Richard Ian Griffiths reported a series of open-market purchases of the company’s American Depositary Shares (ADSs) between 22 and 24 June 2025.
- Griffiths bought 20,977 ADS at $5.84 on 22 Jun, 35,005 ADS at $5.88 on 23 Jun and 26,624 ADS at $6.12 on 24 Jun, totalling 82,606 ADS.
- At the stated prices, the aggregate consideration is approximately US $0.49 million.
- Each ADS represents three ordinary shares; the purchases therefore add about 247,818 ordinary shares to the insider’s economic exposure.
- Following the transactions, Griffiths’ direct holding increased to 11,514,434 ADS, equivalent to roughly 34.5 million ordinary shares, consolidating his status as a 10%+ shareholder.
- All transactions are coded “P” (open-market buy) and were made directly, with no derivative features other than the standard ADS-to-ordinary-share convertibility.
Insider buying by a large, long-term holder is typically interpreted as a positive sentiment signal, suggesting management or significant shareholders view current valuation as attractive. However, the dollar amount, while meaningful, is modest relative to the insider’s existing position, limiting immediate balance-sheet impact.
Silence Therapeutics plc (SLN) – Form 4 insider purchase
On 17 and 18 June 2025, 10% shareholder Richard Ian Griffiths disclosed open-market purchases totaling 70,448 American Depositary Shares (ADS), coded “P”. The transactions were executed at $5.29 and $5.69 per ADS, representing an estimated cash outlay of roughly $0.39 million.
Because each ADS is immediately convertible into three ordinary shares at no additional cost, the buys expand Griffiths’ economic exposure by about 211,344 ordinary shares. His directly held ADS position rose from 11,392,779 to 11,431,828.
The filing did not reference a Rule 10b5-1 trading plan, suggesting discretionary purchases. No insider sales or derivative exercises were reported.
For investors, clustered insider buying by a large, long-tenured holder often serves as a constructive sentiment indicator, especially when executed near multi-year lows (price context not specified in the filing). While modest relative to Griffiths’ total stake, the fresh capital deployment may signal confidence in Silence Therapeutics’ valuation and forthcoming catalysts.