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Transocean Ltd.

RIG
Exchange
NYSE
Industry
Drilling Oil & Gas Wells
SEC CIK
0001451505

In the last 90 days, Transocean Ltd. insiders filed 1 open-market purchase and 0 sales; 547 institutions reported holding it in 13F filings for Q2 2026, worth $5.31B in total; superinvestors Pabrai Investment Funds and Elliott Investment Management hold it.

Open-market trades, last 90 days

Open-market purchases (P) and sales (S) by Transocean Ltd. insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.

Open-market buys
1 filing
1 insider, $173.3K in total
Open-market sells
0 filings
Insiders trading
1
Net value
+$173.3K
Purchases minus sales

Insider roster

Directors, officers and 10% owners who have filed a Form 4 for Transocean Ltd., current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.

Insider roster for Transocean Ltd.
NameTitleLast reported holdingLast filingFilings, past year
Deaton Chad CDirector237,421Jul 7, 20262
Chang Vanessa C LDirector59,200May 27, 20261
Intrieri Vincent JDirector–May 27, 20261
Merksamer Samuel J.Director–May 27, 20261
Dell'Osso Domenic J JrDirector–May 27, 20261
Barker Glyn AnthonyDirector–May 27, 20261
Curado Frederico F.Director–May 27, 20261
Mohn Frederik WilhelmDirector78,904May 27, 20263
Lacey William F.Director61,419May 27, 20261
Long Brady KEVP & Chief Legal Officer1,125,438May 22, 20265
Adamson KeelanPRESIDENT AND CEO1,600,884May 5, 20266
Mackenzie Roderick JamesEVP, Chief Commercial Officer268,025Mar 5, 20265
Thigpen Jeremy DExecutive Chair2,614,548Mar 3, 20263
Vayda Robert ThaddeusEVP, Chief Financial Officer352,635Mar 3, 20263
Pack JasonSVP, Chief Accounting Officer262,103Mar 3, 20262
PerestroikaDirector96,574,894IndirectNov 25, 20252
Perestroika (Cyprus) LtdDirector96,574,894Nov 25, 20252
Oevrum MargarethDirector–May 17, 20240
Davis Howard EEVP, CAO & CIO1,427,231Mar 5, 20240
Tonnel David ASVP - CHIEF ACCOUNTING OFFICER727,088Mar 5, 20240
Mey Mark-Anthony LovellEVP & CFO1,595,750Mar 5, 20240
Muller Edward RDirector–May 15, 20230
de Saint Victor DianeDirector–May 17, 20220

Insider trades

Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.

Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Jul 7, 2026 (view filing)4:22 PM ETJul 25 daysDeaton Chad CDirectorPPurchaseRegistered Shares+35.0K$4.95+$173.3K+17.3%237.4K after
May 22, 2026 (view filing)May 211 dayLong Brady KEVP & Chief Legal OfficerSSaleRegistered Shares−81.7K$7.45−$609.0K−6.8%1.13M after
Mar 5, 2026 (view filing)Mar 41 dayMackenzie Roderick JamesEVP, Chief Commercial OfficerSSaleRegistered Shares−78.4K$6.36−$498.4K−22.6%268.0K after
Jan 28, 2026 (view filing)Jan 26-272 daysAdamson KeelanPRESIDENT AND CEOSSaleRegistered Shares−81.5K$5.00−$407.7K−6.3%1.22M after2 lots10b5-1
Jan 28, 2026 (view filing)Jan 26-272 daysLong Brady KEVP & Chief Legal OfficerSSaleRegistered Shares−115.4K$5.00−$576.9K−9.9%1.05M after2 lots10b5-1
Dec 8, 2025 (view filing)Dec 4-54 daysAdamson KeelanPRESIDENT AND CEOSSaleRegistered Shares−66.4K$4.50−$299.0K−4.8%1.30M after2 lots10b5-1
Dec 5, 2025 (view filing)Dec 32 daysMackenzie Roderick JamesEVP, Chief Commercial OfficerSSaleRegistered Shares−35.0K$4.48−$156.8K−14.2%212.1K after
Dec 1, 2025 (view filing)Nov 265 daysVayda Robert ThaddeusEVP, Chief Financial OfficerSSaleRegistered Shares−30.0K$4.29−$128.7K−11.3%235.2K after
Dec 1, 2025 (view filing)Nov 265 daysThigpen Jeremy DExecutive ChairSSaleRegistered Shares−500.0K$4.32−$2.16M−19.0%2.14M after
Nov 25, 2025 (view filing)Nov 241 dayPerestroika (Cyprus) LtdDirectorPPurchaseRegistered Shares+1.50M$4.02+$6.03M+1.6%96.6M afterDuplicate filing
Nov 25, 2025 (view filing)Nov 241 dayMohn Frederik WilhelmDirectorPPurchaseRegistered Shares+1.50M$4.02+$6.03M+1.6%96.6M afterDuplicate filing
Nov 25, 2025 (view filing)Nov 241 dayPerestroikaDirectorPPurchaseRegistered Shares+1.50M$4.02+$6.03M+1.6%96.6M after
Nov 4, 2025 (view filing)Oct 314 daysMackenzie Roderick JamesEVP, Chief Commercial OfficerSSaleRegistered Shares−53.8K$3.86−$207.5K−17.9%247.1K after
Oct 28, 2025 (view filing)Oct 244 daysAdamson KeelanPRESIDENT AND CEOSSaleRegistered Shares−40.9K$4.00−$163.8K−2.9%1.37M after10b5-1
Oct 28, 2025 (view filing)Oct 244 daysLong Brady KEVP & Chief Legal OfficerSSaleRegistered Shares−97.1K$4.00−$388.4K−7.7%1.16M after10b5-1
Sep 30, 2025 (view filing)Sep 264 daysPerestroika (Cyprus) LtdDirector, 10% OwnerPPurchaseRegistered Shares+4.00M$3.05+$12.2M+4.4%95.1M afterDuplicate filing
Sep 30, 2025 (view filing)Sep 264 daysMohn Frederik WilhelmDirector, 10% OwnerPPurchaseRegistered Shares+4.00M$3.05+$12.2M+4.4%95.1M afterDuplicate filing
Sep 30, 2025 (view filing)Sep 264 daysPerestroikaDirector, 10% OwnerPPurchaseRegistered Shares+4.00M$3.05+$12.2M+4.4%95.1M after
Jun 16, 2025 (view filing)Jun 133 daysMackenzie Roderick JamesEVP, Chief Commercial OfficerSSaleRegistered Shares−40.0K$3.26−$130.4K−11.7%300.8K after
May 12, 2025 (view filing)May 12Same dayMackenzie Roderick JamesEVP, Chief Commercial OfficerSSaleRegistered Shares−22.0K$2.78−$61.2K−6.1%340.8K after10b5-1
May 2, 2025 (view filing)Apr 302 daysChang Vanessa C LDirectorPPurchaseRegistered Shares+10.0K$2.14+$21.4K+20.3%59.2K after
Apr 14, 2025 (view filing)Apr 113 daysMackenzie Roderick JamesEVP, Chief Commercial OfficerSSaleRegistered Shares−22.0K$2.23−$49.1K−5.7%362.8K after10b5-1
Mar 12, 2025 (view filing)Mar 111 dayMackenzie Roderick JamesEVP, Chief Commercial OfficerSSaleRegistered Shares−22.0K$2.94−$64.7K−5.4%384.8K after10b5-1
Feb 13, 2025 (view filing)Feb 112 daysMackenzie Roderick JamesEVP, Chief Commercial OfficerSSaleRegistered Shares−22.0K$3.85−$84.7K−6.6%313.1K after10b5-1
Jan 14, 2025 (view filing)Jan 104 daysMackenzie Roderick JamesEVP, Chief Commercial OfficerSSaleRegistered Shares−22.0K$4.05−$89.1K−8.7%229.6K after10b5-1
Dec 13, 2024 (view filing)Dec 121 dayMackenzie Roderick JamesEVP, Chief Commercial OfficerSSaleRegistered Shares−22.0K$3.95−$86.9K−8.0%251.6K after10b5-1
Nov 22, 2024 (view filing)Nov 22Same dayMackenzie Roderick JamesEVP, Chief Commercial OfficerSSaleRegistered Shares−37.3K$4.38−$163.2K−12.0%273.6K after
Nov 20, 2024 (view filing)Nov 182 daysMackenzie Roderick JamesEVP, Chief Commercial OfficerSSaleRegistered Shares−20.0K$4.29−$85.8K−6.0%310.9K after
Sep 13, 2024 (view filing)Sep 121 dayPerestroikaDirector, 10% OwnerPPurchaseRegistered Shares+1.50M$4.13+$6.20M+1.7%91.1M afterDuplicate filing
Sep 13, 2024 (view filing)Sep 121 dayPerestroika (Cyprus) LtdDirector, 10% OwnerPPurchaseRegistered Shares+1.50M$4.13+$6.20M+1.7%91.1M afterDuplicate filing
Sep 13, 2024 (view filing)Sep 121 dayMohn Frederik WilhelmDirector, 10% OwnerPPurchaseRegistered Shares+1.50M$4.13+$6.20M+1.7%91.1M after
Aug 5, 2024 (view filing)Aug 23 daysPerestroika (Cyprus) LtdDirector, 10% OwnerPPurchaseRegistered Shares+2.00M$5.23+$10.5M+2.3%89.6M afterDuplicate filing
Aug 5, 2024 (view filing)Aug 23 daysPerestroikaDirector, 10% OwnerPPurchaseRegistered Shares+2.00M$5.23+$10.5M+2.3%89.6M afterDuplicate filing
Aug 5, 2024 (view filing)Aug 23 daysMohn Frederik WilhelmDirector, 10% OwnerPPurchaseRegistered Shares+2.00M$5.23+$10.5M+2.3%89.6M after
May 17, 2024 (view filing)May 152 daysPerestroika (Cyprus) LtdDirector, 10% OwnerPPurchaseRegistered Shares+2.00M$6.01+$12.0M+2.3%87.6M afterDuplicate filing
May 17, 2024 (view filing)May 152 daysPerestroikaDirector, 10% OwnerPPurchaseRegistered Shares+2.00M$6.01+$12.0M+2.3%87.6M afterDuplicate filing
May 17, 2024 (view filing)May 152 daysMohn Frederik WilhelmDirector, 10% OwnerPPurchaseRegistered Shares+2.00M$6.01+$12.0M+2.3%87.6M after
Feb 29, 2024 (view filing)Feb 272 daysPerestroika (Cyprus) LtdDirector, 10% OwnerPPurchaseRegistered Shares+1.00M$4.89+$4.89M+1.2%85.6M afterDuplicate filing
Feb 29, 2024 (view filing)Feb 272 daysPerestroikaDirector, 10% OwnerPPurchaseRegistered Shares+1.00M$4.89+$4.89M+1.2%85.6M afterDuplicate filing
Feb 29, 2024 (view filing)Feb 272 daysMohn Frederik WilhelmDirector, 10% OwnerPPurchaseRegistered Shares+1.00M$4.89+$4.89M+1.2%85.6M after
Sep 19, 2023 (view filing)Sep 154 daysPerestroika (Cyprus) LtdDirector, 10% OwnerPPurchaseRegistered Shares+1.98M––+2.4%84.6M afterDuplicate filing
Sep 19, 2023 (view filing)Sep 154 daysPerestroikaDirector, 10% OwnerPPurchaseRegistered Shares+1.98M––+2.4%84.6M afterDuplicate filing
Sep 19, 2023 (view filing)Sep 154 daysMohn Frederik WilhelmDirector, 10% OwnerPPurchaseRegistered Shares+1.98M––+2.4%84.6M after
Sep 5, 2023 (view filing)Aug 315 daysTonnel David ASVP - CHIEF ACCOUNTING OFFICERSSaleRegistered Shares−57.3K$8.22−$470.7K−12.1%417.8K after
Aug 4, 2023 (view filing)Aug 31 dayMey Mark-Anthony LovellEVP & CFOSSaleRegistered Shares−396.2K$8.50−$3.37M−28.7%984.3K after
Jul 20, 2023 (view filing)Jul 182 daysTonnel David ASVP - CHIEF ACCOUNTING OFFICERSSaleRegistered Shares−1.75K$8.76−$15.4K−0.4%475.0K after10b5-1
Apr 25, 2023 (view filing)May 13, 2022347 daysPerestroikaDirector, 10% OwnerPPurchaseRegistered Shares+2.00M$3.75+$7.50M+15.5%14.9M afterAmendedDuplicate filing
Apr 25, 2023 (view filing)May 13, 2022347 daysMohn Frederik WilhelmDirector, 10% OwnerPPurchaseRegistered Shares+2.00M$3.75+$7.50M+15.5%14.9M afterAmended
Apr 19, 2023 (view filing)Apr 172 daysTonnel David ASVP - CHIEF ACCOUNTING OFFICERSSaleRegistered Shares−12.0K$6.53−$78.4K−2.5%476.8K after10b5-1
Mar 6, 2023 (view filing)Mar 24 daysDeaton Chad CDirectorPPurchaseRegistered Shares+30.0K$7.40+$222.0K+27.0%141.0K after