Silence Therapeutics plc (SLN) has 9 known insider and institutional holders on record. The largest holder is Griffiths Richard Ian with 11,805,861 shares. Other notable holders include TOOMAN CRAIG A and Ross Iain.
Over the last 12 months, insiders have made 54 transactions in SLN stock — 52 buys (valued at $11.8M) and 0 sells (valued at RSU Award). Insider buying has outpaced selling during this period, which may signal confidence in the company's prospects.
SLN Insider Ownership
Top Holder
Griffiths Richard Ian
11,805,861 shares
Buys (12 mo)
52
$11.8M value
Sells (12 mo)
0
$0.00 value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Griffiths Richard Ian |
10 Percent Owner |
11,805,861 |
2026-02-13 |
|
| 2 |
Tooman Craig A |
President and CEO |
900,000 |
2025-01-06 |
|
| 3 |
Ross Iain |
Interim Peo |
900,000 |
2025-12-22 |
|
| 4 |
Hellums Rhonda Lynette |
Chief Financial Officer |
375,000 |
2026-01-06 |
|
| 5 |
Romano Steven J. |
EVP and Chief R&d Officer |
300,000 |
2026-01-06 |
|
| 6 |
Lemus David |
Director |
90,000 |
2026-01-06 |
|
| 7 |
Ede-golightly James |
Director |
90,000 |
2026-01-06 |
|
| 8 |
Mcinerney Timothy |
Director |
90,000 |
2026-01-06 |
|
| 9 |
Davidson Michael H. |
Director |
48,000 |
2025-01-06 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2025-10-27 |
Griffiths Richard Ian |
10 Percent Owner |
Informative Buy |
2,000 |
$7.75 |
$15.5K |
| 2025-08-03 |
Griffiths Richard Ian |
10 Percent Owner |
Informative Buy |
20,000 |
$5.45 |
$109K |
| 2026-01-02 |
Ede-golightly James |
Director |
RSU Award |
90,000 |
$2.05 |
$184.5K |
| 2026-01-02 |
Hellums Rhonda Lynette |
Chief Financial Officer |
RSU Award |
375,000 |
$2.05 |
$768.75K |
| 2026-01-02 |
Lemus David |
Director |
RSU Award |
90,000 |
$2.05 |
$184.5K |
| 2026-01-02 |
Romano Steven J. |
EVP and Chief R&d Officer |
RSU Award |
300,000 |
$2.05 |
$615K |
| 2026-01-02 |
Mcinerney Timothy |
Director |
RSU Award |
90,000 |
$2.05 |
$184.5K |
| 2025-12-22 |
Ede-golightly James |
Director |
RSU Award |
90,000 |
$2.15 |
$193.5K |
| 2025-12-14 |
Ede-golightly James |
Director |
Unknown |
27,999 |
$5.13 |
$143.63K |
| 2025-12-18 |
Ross Iain |
Interim Peo |
RSU Award |
900,000 |
$2.08 |
$1.87M |
| 2025-08-01 |
Griffiths Richard Ian |
10 Percent Owner |
Informative Buy |
4,034 |
$6.14 |
$24.77K |
| 2025-07-31 |
Griffiths Richard Ian |
10 Percent Owner |
Informative Buy |
14,342 |
$6.18 |
$88.63K |
| 2025-07-30 |
Griffiths Richard Ian |
10 Percent Owner |
Informative Buy |
8,923 |
$6.14 |
$54.79K |
| 2025-07-29 |
Griffiths Richard Ian |
10 Percent Owner |
Informative Buy |
14,559 |
$6.20 |
$90.27K |
| 2025-07-22 |
Griffiths Richard Ian |
10 Percent Owner |
Informative Buy |
2,910 |
$6.09 |
$17.72K |
| 2025-07-21 |
Griffiths Richard Ian |
10 Percent Owner |
Informative Buy |
22,435 |
$6.04 |
$135.51K |
| 2025-07-15 |
Griffiths Richard Ian |
10 Percent Owner |
Informative Buy |
43,293 |
$6.40 |
$277.08K |
| 2025-07-11 |
Griffiths Richard Ian |
10 Percent Owner |
Informative Buy |
28,000 |
$6.43 |
$180.04K |
| 2025-07-09 |
Griffiths Richard Ian |
10 Percent Owner |
Informative Buy |
30,133 |
$6.00 |
$180.8K |
| 2025-07-08 |
Griffiths Richard Ian |
10 Percent Owner |
Informative Buy |
24,387 |
$5.94 |
$144.86K |
| 2025-07-07 |
Griffiths Richard Ian |
10 Percent Owner |
Informative Buy |
7,937 |
$5.65 |
$44.84K |
| 2025-06-27 |
Griffiths Richard Ian |
10 Percent Owner |
Informative Buy |
24,000 |
$5.82 |
$139.68K |
| 2025-06-26 |
Griffiths Richard Ian |
10 Percent Owner |
Informative Buy |
65,739 |
$5.91 |
$388.52K |
| 2025-06-24 |
Griffiths Richard Ian |
10 Percent Owner |
Informative Buy |
26,624 |
$6.12 |
$162.94K |
| 2025-06-23 |
Griffiths Richard Ian |
10 Percent Owner |
Informative Buy |
35,005 |
$5.88 |
$205.83K |
