Borr Drilling Prospector 5 sank; five unaccounted for

Borr Drilling activated its onshore emergency response team and is working with local authorities and BW Energy.

Rhea-AI Filing Summary

Borr Drilling Limited (BORR) reported that its Prospector 5 drilling rig sank after an incident during jacking operations offshore Gabon on October 24, 2026. Preliminary information indicates the rig experienced a punch through event during preload activities, resulting in loss of stability and the subsequent sinking. The rig was preparing for a planned drilling campaign and was contracted to support BW Energy’s drilling operations.

There were 115 personnel onboard: 110 have been safely accounted for and five remain unaccounted for, with search-and-rescue operations ongoing. Borr Drilling activated its onshore emergency response team and is working with local authorities and BW Energy to respond to the incident and support those affected.

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0 major · 1 point

How the balance works

Positive

• None.

Negative

• Moderate pointProspector 5 sank, with five personnel still unaccounted for.

Filing Explained

Borr says it owned and operated Prospector 5; its sinking removes a company-owned rig from service.

Key Figures

Incident date: October 24, 2026 Incident time: Approximately 20:37 local time Personnel onboard: 115 personnel +2 more

5 metrics

Incident date October 24, 2026 Prospector 5 incident

Incident time Approximately 20:37 local time Prospector 5 incident

Personnel onboard 115 personnel At the time of the incident

Personnel safely accounted for 110 individuals After the incident

Personnel unaccounted for Five individuals Search-and-rescue operations ongoing

Key Terms

punch through event, preload activities, jacking operations

3 terms

punch through event technical

"experienced a punch through event during preload activities"

preload activities technical

"during preload activities"

Preparatory tasks carried out before the main phase of a clinical study, product launch, or operational program begins. In clinical trials, preload activities commonly include screening and consent, baseline measurements, patient run‑in or 'preloading' with a medication to reach a target level or wash out prior treatments, site activation, staff training, and logistics like shipping investigational product; these steps are separate from the trial's primary dosing or efficacy period and are intended to ensure subjects, sites, and materials are ready for the core study or rollout.

jacking operations technical

"while conducting jacking operations offshore Gabon"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What happened to BORR’s Prospector 5 rig?

The Prospector 5 drilling rig sank on October 24, 2026, during jacking operations offshore Gabon. Preliminary information indicates a punch through event during preload activities led to loss of stability. The rig was preparing for a planned drilling campaign.

How many people are unaccounted for after the BORR rig incident?

There were 115 personnel onboard; 110 have been safely accounted for and five remain unaccounted for. Search-and-rescue operations are ongoing.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 6-K: How Foreign Companies Report to the SEC →

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Available on EDGAR 10/26/2026 - 06:02 AM EDT Accepted by SEC EDGAR 10/26/2026 - 06:01 AM EDT Learn about SEC filing dates

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

OF THE SECURITIES EXCHANGE ACT OF 1934

October 26, 2026

Commission File Number 001-39007

Borr Drilling Limited

S. E. Pearman Building

2nd Floor 9 Par-la-Ville Road

Hamilton HM11

Bermuda

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F:

Form 20-F ☒ Form 40-F ☐

Indicate by check mark if the registrant is submitting the Form 6-K on paper as permitted by Regulation S-T Rule 101(b)(1): ☐

Indicate by check mark if the registrant is submitting the Form 6-K on paper as permitted by Regulation S-T Rule 101(b)(7): ☐

Exhibits

99.1 Press Release

 SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	BORR DRILLING LIMITED
Date: October 26, 2026	By:	/s/ Mi Hong Yoon
	Name:	Mi Hong Yoon
	Title:	Director

Exhibit 99.1

PRESS RELEASE

Borr Drilling Limited – Prospector 5 Rig Incident

Hamilton, Bermuda, October 25, 2026 - Borr Drilling Limited (NYSE and OSE: BORR) (“Borr Drilling”) confirms that an incident occurred at approximately 20:37 local time on 24 October 2026 involving the Prospector 5 drilling rig while conducting jacking operations offshore Gabon in preparation for a planned drilling campaign. The Prospector 5 is owned and operated by Borr Drilling and is contracted to support BW Energy’s drilling operations offshore Gabon. Preliminary information indicates that the rig experienced a punch through event during preload activities, resulting in loss of stability and the subsequent sinking of the rig.

Borr Drilling’s onshore emergency response team has been activated, and we are working with local authorities and our customer, BW Energy, to respond to the incident, support those affected, and search for missing personnel. At the time of the incident, there were 115 personnel onboard the rig. A total of 110 individuals have been safely accounted for. Five individuals remain unaccounted for, with extensive search and rescue operations ongoing.

Borr Drilling’s immediate and overriding priority is the safety and wellbeing of all personnel affected by this incident. Family members whom are still seeking information or assistance may contact the team at +44 (0)1224 087026.

Bruno Morand CEO of Borr Drilling said:

“We are deeply concerned for those who remain unaccounted for and everyone affected by this incident. Our immediate priority is supporting the ongoing search and rescue efforts and the welfare of all personnel involved.”

Media enquiries: +44 (0)1224 900626

This information is subject to the disclosure requirements pursuant to section 5-12 of the Norwegian Securities Trading Act.

Filing Exhibits & Attachments

1 document

Press Releases

• EX-99.1 EXHIBIT 99.1 3.6 KB