Transocean's top three insider shareholders as of September 29, 2026 are Perestroika (Director, 96.57Mn shares), Frederik Wilhelm Mohn (Director, 96.57Mn shares), (Cyprus) Ltd Perestroika (Director, 96.57Mn shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | (Cyprus) Ltd Perestroika | Director | 96,574,894 | 0 | 96,574,894 | 47.4% | 25 Nov, 2025 |
| 2 | Perestroika | Director | 0 | 96,574,894 | 96,574,894 | 47.4% | 25 Nov, 2025 |
| 3 | Jeremy D Thigpen | Executive Chair | 2,614,548 | 0 | 2,614,548 | 1.3% | 03 Mar, 2026 |
| 4 | Keelan Adamson | President And Ceo | 1,600,884 | 0 | 1,600,884 | 0.8% | 05 May, 2026 |
| 5 | Mark-Anthony Lovell Mey | Evp Cfo | 1,595,750 | 0 | 1,595,750 | 0.8% | 05 Mar, 2024 |
| 6 | Howard E Davis | Evp, Cao Cio | 1,427,231 | 0 | 1,427,231 | 0.7% | 05 Mar, 2024 |
| 7 | Brady K Long | Evp Chief Legal Officer | 1,125,438 | 0 | 1,125,438 | 0.6% | 22 May, 2026 |
| 8 | David A Tonnel | Svp Chief Accounting Officer | 727,088 | 0 | 727,088 | 0.4% | 05 Mar, 2024 |
| 9 | Robert Thaddeus Vayda | Evp, Chief Financial Officer | 352,635 | 0 | 352,635 | 0.2% | 03 Mar, 2026 |
| 10 | Roderick James Mackenzie | Evp, Chief Commercial Officer | 268,025 | 0 | 268,025 | 0.1% | 05 Mar, 2026 |
| 11 | Jason Pack | Svp, Chief Accounting Officer | 262,103 | 0 | 262,103 | 0.1% | 03 Mar, 2026 |
| 12 | Chad C Deaton | Director | 237,421 | 0 | 237,421 | 0.1% | 07 Jul, 2026 |
| 13 | Frederik Wilhelm Mohn | Director | 78,904 | 0 | 78,904 | 0.0% | 27 May, 2026 |
| 14 | William F. Lacey | Director | 61,419 | 0 | 61,419 | 0.0% | 27 May, 2026 |
| 15 | Vanessa C L Chang | Director | 59,200 | 0 | 59,200 | 0.0% | 02 May, 2025 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 02 Jul, 2026 | Chad C Deaton | Director | Acquired P | 35,000 | $4.95 | $173.25K | 237,421 | Direct |
| 22 May, 2026 | Frederico F. Curado | Director | Acquired A | 30,435 | $0.00 | $0 | 30,435 | Direct |
| 22 May, 2026 | Vanessa C L Chang | Director | Acquired A | 30,435 | $0.00 | $0 | 30,435 | Direct |
| 22 May, 2026 | Glyn Anthony Barker | Director | Acquired A | 30,435 | $0.00 | $0 | 30,435 | Direct |
| 22 May, 2026 | Chad C Deaton | Director | Acquired M | 82,353 | $6.81 | $560.82K | 223,353 | Direct |
| 22 May, 2026 | William F. Lacey | Director | Acquired M | 82,353 | $6.81 | $560.82K | 82,353 | Direct |
| 22 May, 2026 | Domenic J Jr Dell'Osso | Director | Acquired A | 30,435 | $0.00 | $0 | 30,435 | Direct |
| 22 May, 2026 | Samuel J. Merksamer | Director | Acquired A | 30,435 | $0.00 | $0 | 30,435 | Direct |
| 22 May, 2026 | Vincent J Intrieri | Director | Acquired A | 30,435 | $0.00 | $0 | 30,435 | Direct |
| 22 May, 2026 | Frederik Wilhelm Mohn | Director | Acquired M | 82,353 | $6.81 | $560.82K | 104,501 | Direct |
| 26 May, 2026 | Chad C Deaton | Director | Disposed F | 20,932 | $6.70 | $140.24K | 202,421 | Direct |
| 26 May, 2026 | Frederik Wilhelm Mohn | Director | Disposed F | 25,597 | $6.70 | $171.50K | 78,904 | Direct |
| 26 May, 2026 | William F. Lacey | Director | Disposed F | 20,934 | $6.70 | $140.26K | 61,419 | Direct |
| 22 May, 2026 | William F. Lacey | Director | Acquired A | 30,435 | $0.00 | $0 | 30,435 | Direct |
| 22 May, 2026 | Chad C Deaton | Director | Acquired A | 30,435 | $0.00 | $0 | 30,435 | Direct |
| 22 May, 2026 | Frederik Wilhelm Mohn | Director | Acquired A | 30,435 | $0.00 | $0 | 30,435 | Direct |
| 21 May, 2026 | Brady K Long | Evp Chief Legal Officer | Disposed S | 81,741 | $7.45 | $608.97K | 1,125,438 | Direct |
| 01 May, 2026 | Keelan Adamson | President And Ceo | Acquired M | 180,931 | $0.00 | $0 | 1,672,440 | Direct |
| 04 May, 2026 | Keelan Adamson | President And Ceo | Disposed F | 71,556 | $6.82 | $488.01K | 1,600,884 | Direct |
| 04 Mar, 2026 | Roderick James Mackenzie | Evp, Chief Commercial Officer | Disposed S | 78,370 | $6.36 | $498.43K | 268,025 | Direct |