Security key
H8817H100
Transocean Ltd. - Shares, $0.10 par value (RIG)
CUSIP: H8817H100
Q2 2026 13F Holders as of 30 Jun 2026
- Security type / class
- Equity / Shares, $0.10 par value
- Total 13F shares
- 193,771,739
- Total 13F value
- $949,476,926
- Share change
- +22,011,828
- Put/Call ratio
- 91%
- SEC-reported price per share
- $4.89
- Number of holders
- 240
- Value change
- +$102,164,189
- Number of buys
- 104
- Number of sells
- 96
- Shares outstanding
- 1,101,344,330
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q2 2026
Institutions
240
Top holders
10
RIG full security history
Ownership snapshot
Full 13F holder table
Transocean Ltd. SEC filings
Transocean Ltd. company facts
Transocean Ltd. 13D/G history
Broader feeds
Ownership snapshot
Top reported holders of RIG - Transocean Ltd. - Shares, $0.10 par value (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Frederik W. Mohn
Disclosed value leader
BlackRock, Inc.
Comparable rows
15/15
Latest evidence
31 Mar 2026
13D/G
3/4/5
13F
Lead comparable stake: 8.8%
13D/G row: Frederik W. Mohn
Showing 1-6 of 15 holder rows.
Quick read
Frederik W. Mohn leads the comparable SEC ownership view at 8.8%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Frederik W. Mohn's linked filing trail.
Comparable ownership
Top 5
Frederik W. Mohn
8.8%
BlackRock, Inc.
6.4%
Capital World Investors
4.6%
PRIMECAP MANAGEMENT CO/CA/
1.5%
DIMENSIONAL FUND ADVISORS LP
4.4%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Frederik W. Mohn |
13D/G
3/4/5
Director
|
8.8%
|
$400,272,583
96,918,301 shares
|
+$6,195,000 | 09 Feb 2026 |
| BlackRock, Inc. |
13F
13D/G
Company
|
6.4%
from 13D/G
|
$585,901,378
88,371,248 shares
|
— | 31 Mar 2026 |
| Capital World Investors |
13F
13D/G
Company
|
4.6%
from 13D/G
|
$196,085,426
29,575,479 shares
|
— | 31 Mar 2026 |
| PRIMECAP MANAGEMENT CO/CA/ |
13D/G
13F
Company
|
1.5%
|
$37,542,425
13,126,722 shares
|
$0 | 30 Jun 2025 |
| DIMENSIONAL FUND ADVISORS LP |
13F
Company
|
4.4%
|
$323,682,016
48,819,576 shares
|
— | 31 Mar 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC |
13F
Company
|
4.3%
|
$310,699,900
46,862,730 shares
|
— | 31 Mar 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q2 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
240
Shares
193,771,739
Rows available
240
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q2 2026 vs Q1 2026 Across Filers
Q1 2026 holders
536
Q2 2026 holders
240
Holder diff
-296
| Investor | Q1 2026 Shares | Q2 2026 Shares | Share Diff | Share Chg % | Q1 2026 value | Q2 2026 value | Value change | Value Chg % |
|---|