Transocean LTD. (RIG)
NYSE: RIG · Drilling Oil & Gas Wells · Steinhausen, CH · filing with the SEC since 2008
Grade4.1
◀ Past 3.2● Present 4.2▶ Future 4.9
Who owns Transocean LTD.
As filed with the SECHolders of 5% or more
2
Frederik W. Mohn holds 8.8% of Shares, $0.10 par value, as its SCHEDULE 13D/A filed Feb 11, 2026 says.
Directors and officers
17
report now, of 28 people on the record since 2009. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 2 named at left.
Holders of 5% or moreshare of the class, as filed
Frederik W. Mohn
SCHEDULE 13D/A · filed Feb 11, 2026 · Shares, $0.10 par value · 10.1% in Sep 30, 2025
Blackrock, Inc.
SCHEDULE 13G/A · filed Apr 23, 2025 · Common Stock
Capital World Investors
SCHEDULE 13G/A · filed Feb 13, 2025 · Common Stock · reported falling below 5%, from 5.5% in Nov 13, 2024
Primecap Management Co/ca/
SCHEDULE 13G/A · filed Aug 14, 2025 · COM · reported falling below 5%
The Vanguard Group
SCHEDULE 13G/A · filed Mar 27, 2026 · Common Stock · reported falling below 5%
What RIG reports owning in othersstakes of 5% or more, and other ties
Valaris Limited VAL
SCHEDULE 13D · filed Feb 13, 2026 · Common Shares, $0.01 par value
Nauticus Robotics, Inc. KITT
SCHEDULE 13D/A · filed Dec 4, 2025 · Common stock, par value $0.0001 per share · reported falling below 5%
Other ties the annual report names
Liquila
A company bought · asset acquisition · owns, named in the 10-K filed Feb 23, 2026
Transocean Norge
A company bought · asset acquisition · owns, named in the 10-K filed Feb 23, 2026
Valaris Limited
A company bought · acquisition, legal entity · owns, named in the 10-K filed Feb 23, 2026
199 subsidiaries in 28 countries, from the list filed with the 10-K filed Feb 23, 2026.
Insider tradesForm 4
14sales
4purchases
8sales on a scheduled plan
5people selling
$5.6Msold, in dollars
$18.3Mbought, in dollars
Open-market trades on Form 4 from Sep 30, 2025 to Sep 30, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Sep 30, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window9 of 28 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Thigpen Jeremy D | Executive Chair | 1 | $2.2M | 0 | 0 | $0 |
| Long Brady K | EVP & Chief Legal Officer | 4 | $1.6M | 3 | 0 | $0 |
| Adamson Keelan | PRESIDENT AND CEO | 5 | $900,000 | 5 | 0 | $0 |
| Mackenzie Roderick James | EVP, Chief Commercial Officer | 3 | $900,000 | 0 | 0 | $0 |
| Vayda Robert Thaddeus | EVP, Chief Financial Officer | 1 | $100,000 | 0 | 0 | $0 |
| Deaton Chad C | director | 0 | $0 | 0 | 1 | $200,000 |
| Mohn Frederik Wilhelm | director | 0 | $0 | 0 | 1 | $6.0M |
| Perestroika | director | 0 | $0 | 0 | 1 | $6.0M |
| Perestroika (Cyprus) Ltd | director | 0 | $0 | 0 | 1 | $6.0M |