OFSI sanctions listing
Alexei Semenovich SEDOV
Alexei Semenovich SEDOV is an individual designated on the HM Treasury — Office of Financial Sanctions Implementation (OFSI) (OFSI) sanctions list under the Chemical Weapons programme, listed on 20/08/2021. Head of FSB 2nd Service. This page summarises the public designation — known aliases, identifying particulars, the stated reason for listing and linked parties — alongside an independent, transparent risk indicator.
Reason for listing
(UK Sanctions List Ref):CHW0024. (UK Statement of Reasons):Alexei Sedov is the Head of the "2nd Service" Unit in the Federal Security of the Russian Federation (FSB). There is reasonable grounds to suspect that the Federal Security Service of the Russian Federation was involved in the attempted assassination of Alexey Navalny using a toxic nerve agent. As Head of the "2nd Service" Unit, Sedov is responsible for, engaged in, provided support for, or promoted the activities conducted by this unit in the FSB. Alternatively, he is associated with those who did. This designation is part of a further package of designations targeting the FSB operatives directly involved in carrying out the operation. Russian opposition leader Alexey Navalny was the victim of an attempted assassination during his August 2020 visit to Siberia, in which a chemical weapon - a toxic nerve agent of the Novichok group - was used. The activities and movements of Alexey Navalny during his journey to Siberia, from where he intended to return to Moscow on 20th August 2020, were closely monitored by the Federal Security Service of the Russian Federation. Russia had the technical capability to carry out the attack. The Russian State has previously produced Novichoks and would still be capable of doing so. Within the last decade, Russia has produced and stockpiled small quantities of Novichok. It is unlikely that Novichoks could be made and deployed by non-state actors (e.g. a criminal or terrorist group). Russia had the operational experience to carry out the attack. Russia has a proven record of state-sponsored assassination. It is highly likely that the Russian state was responsible for the attempted assassination of Sergei Skripal in Salisbury in 2018 using a similar type of nerve agent. During the 2000s, Russia commenced a programme to test means of delivering chemical warfare agents, including investigation of ways of delivering nerve agents. Russia had the motive and opportunity to carry out the attack. Navalny is a high profile Russian opposition politician who vocally criticised the Russian administration and establishment. He was on Russian territory under surveillance by the Federal Security Service of the Russian Federation at the time of the attack. (Gender):Male
Statement of reasons as published by UK OFSI. This is the issuing authority's wording, reproduced for reference.
Designation record
| List / authority | UK OFSI (OFSI) — Chemical Weapons |
|---|---|
| Entity type | Person |
| Programmes / regime | Chemical Weapons |
| Date listed | 20/08/2021 |
| Source record ID | ofsi:14138 |
| Last updated (our copy) | 2026-06-04 |
Identity & particulars
| Position / role | Head of FSB 2nd Service |
|---|---|
| Date of birth | 00/00/1954 |
Deep-research dossier
Not yet deep-researched
The instant review above is drawn from the public lists. A deep-research dossier goes much further — an analyst-grade OSINT report: associate & co-investment network screening, structural / ownership opacity, a dated risk trajectory, an 8-factor scoring model, and numbered, source-linked evidence. See the format in the design system.
Clarifications & right of reply
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Source & provenance
| Issuing authority | HM Treasury — Office of Financial Sanctions Implementation (OFSI) |
|---|---|
| Source identifier | ofsi:14138 |
| Aggregated by | Sanctiometer (independent) — verify against the issuing authority's official list before acting. |