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Individual

Last Updated: April 19, 2026

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  3. Personal Information

Last Updated: April 19, 2026

Individual

Siarhei Uladzimiravich KASTSIANOK

Aliases

Sergey Vladimirovich KOSTENOK

Nationality

Belarus

DoB

1984-12-10

Address

Belarus

Reg. ID

3101284C003PB0, National ID No.; MC3337847, Passport

Official reason

Belarusian manufacturers LLC AlYurTekh (AlYurTekh) and its Deputy Director, Aleksey Nikolaevich Yavorski (Yavorski), a Belarusian national; ALC Diskoms (Diskoms) and its Deputy Director, Arkady Samuilovich Dimenshtein (Dimenshtein), a Belarusian national; LLC MOT (MOT) and its Commercial Director, Viktoriya Orestovna Savruk (Savruk), a Ukrainian national; LLC Grosver Grup (Grosver Grup) and its representative, Siarhei Uladzimiravich Kastsianok (Kastsianok), a Belarusian national; and Limited Liability Company Tochnaya Mekhanika (Tochnaya Mekhanika) and its Director, Aleksandr Mikolaevich Leschanka (Leschanka), a Belarusian national, have all signed contracts committing the respective companies to supply Peleng with goods or services. FAC is designating Kastsianok pursuant to E.O. 14038 for having acted or is purported to have acted for or on behalf of, directly or indirectly, Grosver Grup, an entity whose property and interests are blocked pursuant to E.O. 14038. OFAC is designating Leschanka pursuant to E.O. 14038 for having been a leader, official, senior executive officer, or member of the board of directors of Tochnaya Mekhanika, an entity whose property and interests are blocked pursuant to E.O. 14038.

Other Information

https://home.treasury.gov/news/press-releases/jy2533

Date of listing

2024-08-09

Program information
Program information
Authority

US

Program

Executive Order 14038 Blocking Property of Additional Persons Contributing to the Situation in Belarus

Regime

OFAC country specific

Target State

Belarus

Measures

Blocking Property, Suspending Entry, Trade sanctions

Official Information

E.O. 14038. On August 9, 2021, the President, invoking the authority of, inter alia, the International Emergency Economic Powers Act (50 U.S.C. 1701 et seq.) (IEEPA), issued E.O. 14038. In E.O. 14038, the President expanded the scope of the national emergency declared in E.O. 13405, finding that the Belarusian regime's harmful activities and long-standing abuses aimed at suppressing democracy and the exercise of human rights and fundamental freedoms in Belarus including illicit and oppressive activities stemming from the August 9, 2020, fraudulent Belarusian presidential election and its aftermath, such as the elimination of political opposition and civil society organizations and the regime's disruption and endangering of international civil air travel—constituted an unusual and extraordinary threat to the national security and foreign policy of the United States.

Additional Details

SDN

Program URL
  • https://www.federalregister.gov/documents/2023/03/27/2023-06170/belarus-sanctions-regulations

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