Griffiths Richard Ian has filed 65 insider transactions across 1 company since January 2025.
Most recent transaction: a sale of 2000 shares of Silence Therapeutics plc ($SLN) on October 27, 2025.
Activity breakdown: 63 open-market purchases and 2 sales.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Oct. 27, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | S | American Depositary Shares | 2000 | $0.00 | 11,819,861.0000 | 141,701,848 | 0.02% | 0.00% |
| Aug. 3, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 20000 | $0.00 | 11,825,861.0000 | 138,752,224 | 0.17% | 0.01% |
| Aug. 3, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | S | American Depositary Shares | 20000 | $0.00 | 11,805,861.0000 | 138,752,224 | 0.17% | 0.01% |
| Oct. 27, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 2000 | $0.00 | 11,825,861.0000 | 141,701,848 | 0.02% | 0.00% |
| Aug. 1, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 4034 | $0.00 | 11,825,861.0000 | 138,752,224 | 0.03% | 0.00% |
| July 31, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 14342 | $0.00 | 11,821,827.0000 | 138,752,224 | 0.12% | 0.01% |
| July 29, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 14559 | $0.00 | 11,798,562.0000 | 138,752,224 | 0.12% | 0.01% |
| July 30, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 8923 | $0.00 | 11,807,485.0000 | 138,752,224 | 0.08% | 0.01% |
| July 21, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 22435 | $0.00 | 11,781,093.0000 | 138,752,224 | 0.19% | 0.02% |
| July 22, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 2910 | $0.00 | 11,784,003.0000 | 138,752,224 | 0.02% | 0.00% |
| July 15, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 43293 | $0.00 | 23,474,023.0000 | 138,752,224 | 0.18% | 0.03% |
| July 11, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 28000 | $0.00 | 23,474,023.0000 | 138,752,224 | 0.12% | 0.02% |
| July 9, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 30133 | $0.00 | 11,687,365.0000 | 138,752,224 | 0.26% | 0.02% |
| July 8, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 24387 | $0.00 | 11,657,232.0000 | 138,752,224 | 0.21% | 0.02% |
| July 7, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 7937 | $0.00 | 11,632,845.0000 | 138,752,224 | 0.07% | 0.01% |
| June 26, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 65739 | $0.00 | 11,580,173.0000 | 138,752,224 | 0.57% | 0.05% |
| June 26, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 20735 | $0.00 | 11,600,908.0000 | 138,752,224 | 0.18% | 0.01% |
| June 27, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 24000 | $0.00 | 11,624,908.0000 | 138,752,224 | 0.21% | 0.02% |
| June 23, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 35005 | $0.00 | 11,487,810.0000 | 138,752,224 | 0.31% | 0.03% |
| June 24, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 26624 | $0.00 | 11,514,434.0000 | 138,752,224 | 0.23% | 0.02% |
| June 22, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 20977 | $0.00 | 11,452,805.0000 | 138,752,224 | 0.18% | 0.02% |
| June 18, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 39049 | $0.00 | 11,431,828.0000 | 138,752,224 | 0.34% | 0.03% |
| June 17, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 31399 | $0.00 | 11,392,779.0000 | 138,752,224 | 0.28% | 0.02% |
| June 12, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 39305 | $0.00 | 11,361,380.0000 | 138,752,224 | 0.35% | 0.03% |
| May 27, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 50000 | $0.00 | 11,312,906.0000 | 138,752,224 | 0.44% | 0.04% |
| May 28, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 9169 | $0.00 | 11,322,075.0000 | 138,752,224 | 0.08% | 0.01% |
| May 26, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 26669 | $0.00 | 11,262,906.0000 | 138,752,224 | 0.24% | 0.02% |
| May 23, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 17187 | $0.00 | 11,236,237.0000 | 138,752,224 | 0.15% | 0.01% |
| May 22, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 19174 | $0.00 | 11,219,050.0000 | 138,752,224 | 0.17% | 0.01% |
| May 18, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 37023 | $0.00 | 11,157,876.0000 | 138,752,224 | 0.33% | 0.03% |
| May 20, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 16000 | $0.00 | 11,199,876.0000 | 138,752,224 | 0.14% | 0.01% |
| May 19, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 26000 | $0.00 | 11,183,876.0000 | 138,752,224 | 0.23% | 0.02% |
| May 13, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 94234 | $0.00 | 11,065,087.0000 | 138,752,224 | 0.86% | 0.07% |
| May 14, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 55766 | $0.00 | 11,120,853.0000 | 138,752,224 | 0.50% | 0.04% |
| May 7, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 50000 | $0.00 | 10,970,853.0000 | 138,752,224 | 0.46% | 0.04% |
| May 5, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 100000 | $0.00 | 10,820,853.0000 | 138,752,224 | 0.93% | 0.07% |
| May 6, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 100000 | $0.00 | 10,920,850.0000 | 138,752,224 | 0.92% | 0.07% |
| April 30, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 34309 | $0.00 | 10,645,587.0000 | 138,752,224 | 0.32% | 0.02% |
| May 1, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 75266 | $0.00 | 10,720,853.0000 | 138,752,224 | 0.71% | 0.05% |
| April 28, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 95211 | $0.00 | 10,556,510.0000 | 138,752,224 | 0.91% | 0.07% |
| April 29, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 54768 | $0.00 | 10,611,278.0000 | 138,752,224 | 0.52% | 0.04% |
| April 24, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 90432 | $0.00 | 10,401,731.0000 | 138,752,224 | 0.88% | 0.07% |
| April 25, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 59568 | $0.00 | 10,461,299.0000 | 138,752,224 | 0.57% | 0.04% |
| April 22, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 50000 | $0.00 | 10,261,299.0000 | 138,752,224 | 0.49% | 0.04% |
| April 23, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 50000 | $0.00 | 10,311,299.0000 | 138,752,224 | 0.49% | 0.04% |
| April 17, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 50000 | $0.00 | 10,111,299.0000 | 138,752,224 | 0.50% | 0.04% |
| April 21, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 100000 | $0.00 | 10,211,299.0000 | 138,752,224 | 0.99% | 0.07% |
| April 15, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 27918 | $0.00 | 10,061,299.0000 | 138,752,224 | 0.28% | 0.02% |
| April 10, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 25193 | $0.00 | 9,886,492.0000 | 138,752,224 | 0.26% | 0.02% |
| April 11, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 56480 | $0.00 | 9,942,972.0000 | 138,752,224 | 0.57% | 0.04% |
| April 14, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 40409 | $0.00 | 9,983,381.0000 | 138,752,224 | 0.41% | 0.03% |
| April 14, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 50000 | $0.00 | 10,033,381.0000 | 138,752,224 | 0.50% | 0.04% |
| March 31, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 100000 | $0.00 | 9,861,299.0000 | 138,752,224 | 1.02% | 0.07% |
| March 31, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 100000 | $0.00 | 9,761,299.0000 | 138,752,224 | 1.04% | 0.07% |
| March 27, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 50000 | $0.00 | 9,611,299.0000 | 138,752,224 | 0.52% | 0.04% |
| March 28, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 50000 | $0.00 | 9,661,299.0000 | 138,752,224 | 0.52% | 0.04% |
| March 5, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 22632 | $0.00 | 9,561,299.0000 | 138,752,224 | 0.24% | 0.02% |
| Jan. 23, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 12226 | $0.00 | 18,864,560.0000 | 138,752,224 | 0.06% | 0.01% |
| Feb. 13, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 92774 | $0.00 | 18,957,334.0000 | 138,752,224 | 0.49% | 0.07% |
| Feb. 13, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 60000 | $0.00 | 18,897,334.0000 | 138,752,224 | 0.32% | 0.04% |
| Feb. 18, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 60000 | $0.00 | 18,957,334.0000 | 138,752,224 | 0.32% | 0.04% |
| Jan. 21, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 20000 | $0.00 | 18,852,334.0000 | 138,752,224 | 0.11% | 0.01% |
| Jan. 21, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 25000 | $0.00 | 18,832,334.0000 | 138,752,224 | 0.13% | 0.02% |
| Jan. 17, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 150000 | $0.00 | 18,807,334.0000 | 138,752,224 | 0.80% | 0.11% |
| Jan. 8, 2025 | Silence Therapeutics plc | $SLN | Griffiths Richard Ian | TenPercentOwner | P | American Depositary Shares | 30000 | $0.00 | 18,537,334.0000 | 138,752,224 | 0.16% | 0.02% |