Borr Drilling Limited
DE ˙ DB ˙ BMG1466R1732
4,30 € ↓ -0,03 (-0,60%)
2026-06-04
DEL PRIS
SecurityDE:B2W / Borr Drilling Limited
InstitutionCitadel Advisors Llc
ManagerKen Griffin
Latest Disclosed Ownership1,089,248 shares
Latest Disclosed Value $ 6,284,961
Citadel Advisors Llc ownership in B2W / Borr Drilling Limited

On May 15, 2026 - Citadel Advisors Llc filed a 13F-HR form disclosing ownership of 1,089,248 shares of Borr Drilling Limited (DE:B2W) valued at $5,385,242 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 1,600,048 shares of Borr Drilling Limited. This represents a change in shares of -31.92% during the quarter. The current value of the position is $4,679,409 USD.

Citadel Advisors 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 75,200 of underlying shares valued at $433,904 USD and put options representing 257,300 of underlying shares valued at $1,484,621 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.

Upgrade to unlock premium data and export to Excel .

Institutional Put/Call Ratios
(Premium Subscription Required)

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)
2026-05-15 2026-03-31 13F BORR DRILLING SHS G1466R173 1,089,248 -510,800 -31.92 6,285 -2.54 0.0009
2026-02-17 2025-12-31 13F BORR DRILLING SHS G1466R173 1,600,048 1,472,162 1,151.15 6,448 1,774.42 0.0010
2025-11-14 2025-09-30 13F BORR DRILLING SHS G1466R173 127,886 -4,029,112 -96.92 344 -95.48 0.0001
2025-08-14 2025-06-30 13F BORR DRILLING SHS G1466R173 4,156,998 2,082,869 100.42 7,607 67.48 0.0013
2025-05-15 2025-03-31 13F BORR DRILLING SHS G1466R173 2,074,129 673,859 48.12 4,542 -16.83 0.0009
2025-02-14 2024-12-31 13F BORR DRILLING SHS G1466R173 1,400,270 514,288 58.05 5,461 12.27 0.0009
2024-11-14 2024-09-30 13F BORR DRILLING SHS G1466R173 885,982 527,781 147.34 4,864 110.56 0.0009
2024-08-14 2024-06-30 13F BORR DRILLING SHS G1466R173 358,201 -69,049 -16.16 2,310 -21.05 0.0005
2024-05-15 2024-03-31 13F BORR DRILLING SHS G1466R173 427,250 125,103 41.40 2,927 31.62 0.0006
2024-02-14 2023-12-31 13F BORR DRILLING SHS G1466R173 302,147 113,320 60.01 2,224 65.90 0.0004
2023-11-14 2023-09-30 13F BORR DRILLING SHS G1466R173 188,827 159,020 533.50 1,341 498.21 0.0003
2023-08-14 2023-06-30 13F BORR DRILLING SHS G1466R173 29,807 -172,236 -85.25 224 -85.37 0.0000
2023-05-15 2023-03-31 13F BORR DRILLING SHS G1466R173 202,043 77,150 61.77 1,531 146.94 0.0003
2023-02-14 2022-12-31 13F BORR DRILLING SHS G1466R173 124,893 124,893 621 0.0001
2022-08-15 2022-06-30 13F BORR DRILLING SHS G1466R173 0 -13,364 -100.00 0 -100.00
2022-05-16 2022-03-31 13F BORR DRILLING SHS G1466R173 13,364 -25,725 -65.81 45 -44.44 0.0000
2022-02-14 2021-12-31 13F BORR DRILLING SHS G1466R173 39,089 -59,394 -60.31 81 -2.41 0.0000
2021-11-15 2021-09-30 13F BORR DRILLING Cmn G1466R207 98,483 -114,370 -53.73 83 -52.02 0.0000
2021-08-16 2021-06-30 13F BORR DRILLING SHS G1466R207 212,853 -105,046 -33.04 173 -43.65 0.0000
2021-05-21 2021-03-31 13F/A-1 BORR DRILLING SHS G1466R207 317,899 317,899 307 0.0001
2021-05-17 2021-03-31 13F BORR DRILLING SHS G1466R207 317,899 317,899 307 0.0001
2021-02-16 2020-12-31 13F BORR DRILLING SHS G1466R207 0 -60,692 -100.00 0 -100.00
2020-11-16 2020-09-30 13F BORR DRILLING SHS G1466R207 60,692 60,692 33 0.0000
2020-05-15 2020-03-31 13F BORR DRILLING Cmn G1466R207 0 -40,803 -100.00 0 -100.00
2020-02-14 2019-12-31 13F BORR DRILLING Cmn G1466R207 40,803 -8,548 -17.32 369 45.28 0.0002
2019-11-14 2019-09-30 13F BORR DRILLING Cmn G1466R207 49,351 49,351 254 0.0001
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
(%)
2026-05-15 2026-03-31 13F BORR DRILLING SHS Call 75,200 -10.37 434 28.11 n/a n/a n/a
2026-02-17 2025-12-31 13F BORR DRILLING SHS Call 83,900 77.38 338 166.14 n/a n/a n/a
2025-11-14 2025-09-30 13F BORR DRILLING SHS Call 47,300 59.26 127 135.19 n/a n/a n/a
2025-08-14 2025-06-30 13F BORR DRILLING SHS Call 29,700 -33.26 54 -44.33 n/a n/a n/a
2025-05-15 2025-03-31 13F BORR DRILLING SHS Call 44,500 117.07 97 22.78 n/a n/a n/a
2025-02-14 2024-12-31 13F BORR DRILLING SHS Call 20,500 1,476.92 80 1,028.57 n/a n/a n/a
2024-11-14 2024-09-30 13F BORR DRILLING SHS Call 1,300 0.00 7 -12.50 n/a n/a n/a
2024-08-14 2024-06-30 13F BORR DRILLING SHS Call 1,300 18.18 8 14.29 n/a n/a n/a
2024-05-15 2024-03-31 13F BORR DRILLING SHS Call 1,100 8 n/a n/a n/a
2023-11-14 2023-09-30 13F BORR DRILLING SHS Call 0 -100.00 0 -100.00 n/a n/a n/a
2023-08-14 2023-06-30 13F BORR DRILLING SHS Call 2,900 22 n/a n/a n/a
2023-05-15 2023-03-31 13F BORR DRILLING SHS Call 0 -100.00 0 -100.00 n/a n/a n/a
2023-02-14 2022-12-31 13F BORR DRILLING SHS Call 800 4 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
(%)
2026-05-15 2026-03-31 13F BORR DRILLING SHS Put 257,300 26.00 1,485 80.54 n/a n/a n/a
2026-02-17 2025-12-31 13F BORR DRILLING SHS Put 204,200 170.82 823 306.93 n/a n/a n/a
2025-11-14 2025-09-30 13F BORR DRILLING SHS Put 75,400 185.61 203 320.83 n/a n/a n/a
2025-08-14 2025-06-30 13F BORR DRILLING SHS Put 26,400 -45.00 48 -54.29 n/a n/a n/a
2025-05-15 2025-03-31 13F BORR DRILLING SHS Put 48,000 31.87 105 -25.53 n/a n/a n/a
2025-02-14 2024-12-31 13F BORR DRILLING SHS Put 36,400 -35.80 142 -54.66 n/a n/a n/a
2024-11-14 2024-09-30 13F BORR DRILLING SHS Put 56,700 -37.00 311 -46.38 n/a n/a n/a
2024-08-14 2024-06-30 13F BORR DRILLING SHS Put 90,000 378.72 580 353.13 n/a n/a n/a
2024-05-15 2024-03-31 13F BORR DRILLING SHS Put 18,800 84.31 129 70.67 n/a n/a n/a
2024-02-14 2023-12-31 13F BORR DRILLING SHS Put 10,200 410.00 75 435.71 n/a n/a n/a
2023-11-14 2023-09-30 13F BORR DRILLING SHS Put 2,000 14 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.