Borr Drilling Limited
DE ˙ DB ˙ BMG1466R1732
4,30 € ↓ -0,03 (-0,60%)
2026-06-04
DEL PRIS
SecurityDE:B2W / Borr Drilling Limited
InstitutionJane Street Group, Llc
Latest Disclosed Ownership625,064 shares
Latest Disclosed Value $ 3,606,619
Jane Street Group, Llc ownership in B2W / Borr Drilling Limited

On May 12, 2026 - Jane Street Group, Llc filed a 13F-HR form disclosing ownership of 625,064 shares of Borr Drilling Limited (DE:B2W) valued at $3,090,316 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 1,239,056 shares of Borr Drilling Limited. This represents a change in shares of -49.55% during the quarter. The current value of the position is $2,685,275 USD.

Jane Street Group, Llc has a history of taking positions in derivatives of the underlying security (B2W) in the form of stock options. The firm currently holds call options representing 39,200 of underlying shares valued at $226,184 USD and put options representing 17,300 of underlying shares valued at $99,821 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

DE:B2W / Borr Drilling Limited Historical Put/Call Ratio
Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-05-12 2026-03-31 13F BORR DRILLING SHS G1466R173 625,064 -613,992 -49.55 3,607 -27.78 0.0002
2026-02-12 2025-12-31 13F BORR DRILLING SHS G1466R173 1,239,056 857,532 224.76 4,993 386.65 0.0008
2025-11-14 2025-09-30 13F BORR DRILLING SHS G1466R173 381,524 -687,381 -64.31 1,026 -47.55 0.0002
2025-08-14 2025-06-30 13F BORR DRILLING SHS G1466R173 1,068,905 -523,561 -32.88 1,956 -43.91 0.0004
2025-05-19 2025-03-31 13F/A-1 BORR DRILLING SHS G1466R173 1,592,466 -357,042 -18.31 3,488 -54.14 0.0009
2025-05-14 2025-03-31 13F BORR DRILLING SHS G1466R173 1,592,466 -357,042 3,488 0.0007
2025-02-14 2024-12-31 13F BORR DRILLING SHS G1466R173 1,949,508 1,728,570 782.38 7,603 525.76 0.0017
2024-11-15 2024-09-30 13F BORR DRILLING SHS G1466R173 220,938 -168,857 -43.32 1,215 -51.54 0.0003
2024-08-15 2024-06-30 13F BORR DRILLING SHS G1466R173 389,795 186,331 91.58 2,507 93.44 0.0006
2024-05-16 2024-03-31 13F BORR DRILLING SHS G1466R173 203,464 51,652 34.02 1,296 14.49 0.0003
2024-02-15 2023-12-31 13F BORR DRILLING SHS G1466R173 151,812 -750,715 -83.18 1,132 -82.14 0.0003
2023-11-15 2023-09-30 13F BORR DRILLING SHS G1466R173 902,527 483,783 115.53 6,338 106.65 0.0020
2023-08-14 2023-06-30 13F BORR DRILLING SHS G1466R173 418,744 236,544 129.83 3,068 120.33 0.0010
2023-05-16 2023-03-31 13F BORR DRILLING SHS G1466R173 182,200 101,645 126.18 1,392 217.81 0.0006
2023-02-15 2022-12-31 13F BORR DRILLING SHS G1466R173 80,555 -416,401 -83.79 438 -73.94 0.0002
2022-11-15 2022-09-30 13F BORR DRILLING SHS G1466R173 496,956 344,754 226.51 1,681 147.21 0.0007
2022-08-16 2022-06-30 13F BORR DRILLING SHS G1466R173 152,202 103,313 211.32 680 312.12 0.0003
2022-05-17 2022-03-31 13F BORR DRILLING SHS G1466R173 48,889 27,627 129.94 165 266.67 0.0001
2022-02-15 2021-12-31 13F BORR DRILLING SHS G1466R173 21,262 21,262 45 0.0000
2021-11-16 2021-09-30 13F BORR DRILLING SHS G1466R207 0 -671,338 -100.00 0 -100.00
2021-08-16 2021-06-30 13F BORR DRILLING SHS G1466R207 671,338 -163,383 -19.57 555 -33.29 0.0002
2021-05-18 2021-03-31 13F BORR DRILLING SHS G1466R207 834,721 810,461 3,340.73 832 3,861.90 0.0004
2021-02-17 2020-12-31 13F BORR DRILLING SHS G1466R207 24,260 -53,479 -68.79 21 -52.27 0.0000
2020-11-17 2020-09-30 13F BORR DRILLING SHS G1466R207 77,739 -93,339 -54.56 44 -76.60 0.0000
2020-08-17 2020-06-30 13F BORR DRILLING SHS G1466R207 171,078 114,344 201.54 188 596.30 0.0001
2020-05-15 2020-03-31 13F BORR DRILLING SHS G1466R207 56,734 56,734 27 0.0000
2020-02-14 2019-12-31 13F BORR DRILLING SHS G1466R207 0 -31,755 -100.00 0 -100.00
2019-11-14 2019-09-30 13F BORR DRILLING SHS G1466R207 31,755 31,755 164 0.0003
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-12 2026-03-31 13F BORR DRILLING SHS Call 39,200 5.95 226 51.68 n/a n/a n/a
2026-02-12 2025-12-31 13F BORR DRILLING SHS Call 37,000 120.24 149 231.11 n/a n/a n/a
2025-11-14 2025-09-30 13F BORR DRILLING SHS Call 16,800 -47.83 45 -22.41 n/a n/a n/a
2025-08-14 2025-06-30 13F BORR DRILLING SHS Call 32,200 5.57 59 -12.12 n/a n/a n/a
2025-05-19 2025-03-31 13F/A BORR DRILLING SHS Call 30,500 67 n/a n/a n/a
2025-05-14 2025-03-31 13F BORR DRILLING SHS Call 30,500 67 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-12 2026-03-31 13F BORR DRILLING SHS Put 17,300 -62.72 100 -46.77 n/a n/a n/a
2026-02-12 2025-12-31 13F BORR DRILLING SHS Put 46,400 114.81 187 220.69 n/a n/a n/a
2025-11-14 2025-09-30 13F BORR DRILLING SHS Put 21,600 58 n/a n/a n/a
2025-08-14 2025-06-30 13F BORR DRILLING SHS Put 0 -100.00 0 -100.00 n/a n/a n/a
2025-05-19 2025-03-31 13F/A BORR DRILLING SHS Put 13,600 30 n/a n/a n/a
2025-05-14 2025-03-31 13F BORR DRILLING SHS Put 13,600 30 n/a n/a n/a
2025-02-14 2024-12-31 13F BORR DRILLING SHS Put 0 -100.00 0 -100.00 n/a n/a n/a
2024-11-15 2024-09-30 13F BORR DRILLING SHS Put 14,100 78 n/a n/a n/a
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.