The results for the fourth quarter ended 31 December 2021 will be published on Monday 28 February 2022 at 16:00 (CET) on the Oslo Stock Exchange (ticker code: SIOFF) and on Siem Offshore Inc.'s website www.siemoffshore.com.

Aconference call will be held on Tuesday 01 March 2022 at 09:00 (CET) to reviewthe presentation and discuss the fourth quarter 2021 release.

The call will be hosted by Bernt Omdal - CEO, Siem Offshore Inc. and Vidar Jerstad- CFO, Siem Offshore Inc.

To join the audio conference, please click the link below to join the webinar: https://us02web.zoom.us/webinar/register/WN_FNVvQD_JSMi9_KeMIg19Bg

The conference call will be recorded and made available on www.siemoffshore.com

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