SLN on Nasdaq

Silence Therapeutics plc

British pharmaceutical preparations company, incorporated in the United Kingdom.

Price unavailable

Last updated Oct 18, 2026.

Overview

Compare with Trevena Inc, Yarrow Bioscience, Inc. or Quantum Cyber N.V., or pick any stock.

  • TickerSLN on Nasdaq
  • IndustryPharmaceutical Preparations
  • HeadquartersX0
  • Incorporated inUnited Kingdom2
  • Business address12 Hammersmith Grove, Office 205, London, W6 7Ap2
  • Filer categoryNon-accelerated filer, Smaller reporting company2

Financials

From the company’s reports to the SEC. Every number links to the filing it came from.

Key numbers, fiscal 2025

61.5%Gross margin3
-16292.8%Operating margin3
-15851.9%Net margin3
-98.7%Revenue growth, 20253
-142.2%Return on equity3
-$62.3MFree cash flow3

Where the money goes

Where each dollar of revenue went, fiscal 2025

  • Cost of revenue0¢$215.0K
  • Research and development100¢$67.8M
  • Income tax0¢$11.0K

Out of $559.0K in revenue.3 The company lost money this year.

Financial statements

Revenue453$559.0K in 2025−89% since 2020
0$20.0M$40.0M$60.0M2020: $5.3M$5.3M20202022: $21.7M$21.7M2022+309%2023: $31.6M$31.6M2023+46%2024: $43.3M$43.3M2024+37%2025: $559.0K$559.0K2025−99%
Gross profit64753$344.0K in 2025+41% since 2019
0$10.0M$20.0M$30.0M$40.0M2019: $244.0K$244.0K20192020: $1.7M$1.7M2020+604%2021: $5.0M$5.0M2021+189%2022: $8.2M$8.2M2022+65%2023: $18.8M$18.8M2023+129%2024: $31.4M$31.4M2024+67%2025: $344.0K$344.0K2025−99%
Operating income64753-$91.1M in 2025+301% since 2019
-$100.0M-$75.0M-$50.0M-$25.0M02019: -$22.7M-$22.7M20192020: -$35.8M-$35.8M2020+58%2021: -$45.8M-$45.8M2021+28%2022: -$61.0M-$61.0M2022+33%2023: -$64.4M-$64.4M2023+5%2024: -$63.3M-$63.3M2024−2%2025: -$91.1M-$91.1M2025+44%
Net income64753-$88.6M in 2025+353% since 2019
-$100.0M-$75.0M-$50.0M-$25.0M02019: -$19.6M-$19.6M20192020: -$32.5M-$32.5M2020+66%2021: -$39.4M-$39.4M2021+21%2022: -$50.3M-$50.3M2022+28%2023: -$54.2M-$54.2M2023+8%2024: -$45.3M-$45.3M2024−16%2025: -$88.6M-$88.6M2025+96%

Every line of the income statement as filed: the last 3 fiscal years, latest first.3

Period ending2025-12-312024-12-312023-12-31
Revenue$559.0K$43.3M$31.6M
Cost of sales-$215.0K-$11.8M
Gross profit$344.0K$31.4M
Research and development costs-$67.8M-$67.9M
General and administrative expenses-$22.3M-$26.9M
Restructuring charges-$1.3M$0
Operating loss-$91.1M-$63.3M
Foreign currency (loss)/gain, net-$8.5M$646.0K
Other income, net$3.5M$4.5M
Benefit from R&D credit$7.5M$13.7M
Loss before income tax expense-$88.6M-$44.5M
Income tax expense-$11.0K-$845.0K
Net Loss-$88.6M-$45.3M
Loss per share basic-$0.63-$0.33
Loss per share diluted-$0.63-$0.33
Weighted-average shares outstanding basic141.7M shares138.8M shares
Weighted-average shares outstanding diluted141.7M shares138.8M shares

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Leadership

Who has led Silence Therapeutics plc, and when. Pick a name to see everywhere that person has worked.

Chief executive

  1. Craig A. Tooman2025

Chief financial officer

  1. Rhonda Lynette Hellums2025–now
Board members and other officers (9)

Timeline

  1. Jan 2, 2025New chief executive Craig A. Tooman becomes CEO10

Filings

205 filings to the SEC since October 2021: 6 annual reports, 5 quarterly reports, 22 major events, 52 insider forms, 35 large holders, 85 other. The latest 20:

  1. Oct 13, 2026SCHEDULE 13G/A EDGAR
  2. Oct 13, 2026SCHEDULE 13G EDGAR
  3. Aug 13, 2026SCHEDULE 13G/A EDGAR
  4. Aug 13, 2026SCHEDULE 13D/A EDGAR
  5. Aug 13, 20264 OWNERSHIP DOCUMENT EDGAR
  6. Aug 12, 20268-K EDGAR
  7. Aug 12, 2026424B5 EDGAR
  8. Aug 11, 2026S-3MEF EDGAR
  9. Aug 10, 2026424B5 EDGAR
  10. Aug 10, 20268-K EDGAR
  11. Aug 10, 202610-Q EDGAR
  12. Aug 10, 20268-K EDGAR
  13. Jul 16, 20268-K/A EDGAR
  14. Jul 8, 2026SCHEDULE 13D/A EDGAR
  15. Jul 7, 20264 OWNERSHIP DOCUMENT EDGAR
  16. Jun 23, 20268-K EDGAR
  17. Jun 16, 20268-K EDGAR
  18. Jun 11, 20268-K EDGAR
  19. May 27, 2026EFFECT EDGAR
  20. May 27, 2026424B5 EDGAR

The 205 filings since October 2021 can be filtered by form type and year here when JavaScript is on.

Every filing from the last three years, summarized. The full record is on SEC EDGAR.

Insider trades and holders

Large holders

Investors who own more than 5% must tell the SEC: a 13D if they may seek to influence the company, a 13G if they hold passively. 35 such filings since October 2021, the latest 10:

  1. Oct 13, 2026SCHEDULE 13G/A
  2. Oct 13, 2026SCHEDULE 13G
  3. Aug 13, 2026SCHEDULE 13G/A
  4. Aug 13, 2026SCHEDULE 13D/A
  5. Jul 8, 2026SCHEDULE 13D/A
  6. Feb 9, 2026SCHEDULE 13G/A
  7. Jun 25, 2025SCHEDULE 13D/A
  8. May 15, 2025SCHEDULE 13G/A
  9. May 8, 2025SCHEDULE 13D/A
  10. Apr 24, 2025SCHEDULE 13D/A

From Forms 4 and Schedules 13D and 13G filed with the SEC.

Held by these funds

The largest holders among investment managers' 13F reports for the quarter ending Jun 30, 2026, the top 25 of 72. Change is in shares since the quarter before.

FundSharesValueShare of the fundChange
Siren, L.L.C.3,311,438$36.4M0.7%+400,000
TCG Crossover Management, LLC3,033,560$33.3M0.8%No change
Nantahala Capital Management, LLC2,693,462$29.6M0.9%+546,731
Redmile Group, LLC2,164,777$23.8M1.6%No change
Citadel Advisors LLC1,329,625$14.6M0.0%+94,818
Nextech Invest Ltd.952,400$10.5M0.5%No change
Millennium Management LLC909,279$10.0M0.0%−164,912
Tetragon Partners GP Ltd764,256$8.4M1.4%+134,095
Soleus Capital Management, L.P.630,000$6.9M0.2%New
Balyasny Asset Management L.P.610,980$6.7M0.0%New
5AM Venture Management, LLC476,200$5.2M1.8%No change
Great Point Partners LLC450,000$4.9M1.2%−570,489
Morgan Stanley403,172$4.4M0.0%+337,686
Ameriprise Financial Inc370,052$4.1M0.0%New
Jane Street Group, LLC369,151$4.1M0.0%+268,224
ADAR1 Capital Management, LLC338,373$3.7M0.2%+166,216
SummitTX Capital, L.P.326,648$3.6M0.1%New
Schonfeld Strategic Advisors LLC269,348$3.0M0.0%New
UBS Group AG243,152$2.7M0.0%−3,785
Ishara Investments LP55,350$2.4M1.8%−85,150
BlackRock, Inc.219,917$2.4M0.0%+15,140
Bank Of Montreal /can/201,734$2.2M0.0%−1,167
Boothbay Fund Management, LLC198,347$2.2M0.0%−10,741
Propel Bio Management, LLC191,733$2.1M1.1%New
Susquehanna International Group, Llp184,519$2.0M0.0%+69,238

13F reports cover disclosed long positions in U.S. stocks only.