Transocean Ltd (Switzerland) RIG
Open calendar →Transocean Ltd (Switzerland) Common Stock · Company · NYSE
USD closing-price chart (daily close from yfinance · Last year)
USD 3.09 → 5.30 · 71.5%
Numbered dotted lines mark the filtered filings under Announcement Events below.
Price & SEC Filing History 23 Jul 2025 — 24 Jul 2026 (Last year)
Daily NYSE prices are sourced from yfinance. Yellow highlighting marks an intraday rise or a gap up between adjacent trading sessions. SEC acceptance times are converted to US Eastern time: pre-market filings appear below that day’s OHLCV row; filings accepted after the 09:30 ET open appear above it. The SEC does not publish an exact first-public-availability timestamp, so acceptance time is the best available proxy.
Date
Open
High
Low
Close
Volume
No data yet
No data yet
5.3500
5.3800
5.2500
5.3000
42,522,582
5.0800
5.2600
4.9800
5.2400
40,662,100
5.0900
5.2300
5.0000
5.0200
26,665,200
Weekend
Weekend
5.1800
5.1800
5.0600
5.1400
36,094,100
5.1900
5.2200
5.1000
5.1200
31,539,900
5.3600
5.3700
5.1000
5.2000
30,234,900
5.4700
5.5100
5.2500
5.3100
37,610,400
5.2900
5.4400
5.1900
5.3700
50,931,400
Weekend
Weekend
5.1800
5.2500
5.1200
5.2000
46,082,000
5.1600
5.1800
5.0500
5.1400
35,208,900
5.1700
5.2900
5.1100
5.2300
42,580,600
5.0100
5.1200
4.9100
5.0200
34,136,100
5.0100
5.1400
4.9300
4.9300
22,015,600
Weekend
Weekend
No trading
4.9500
5.1100
4.9300
5.0600
26,459,300
4.8700
5.0000
4.8000
4.8700
59,981,500
45 · DEFA14A
Pre-market · 09:02 ET
DEFA14A ↗
44 · 8-K
Pre-market · 09:01 ET
FORM 8-K ↗
5.0600
5.1800
4.8800
4.8900
61,601,900
5.1200
5.1900
5.0200
5.0400
36,439,900
Weekend
Weekend
5.1500
5.2200
5.0400
5.1100
48,993,300
5.0500
5.2200
4.9900
5.2100
31,914,200
5.2000
5.2000
5.0200
5.0400
42,327,500
5.3300
5.4100
5.2800
5.2900
23,147,700
5.3800
5.4100
5.2300
5.4100
30,886,900
Weekend
Weekend
No trading
5.5500
5.5700
5.1400
5.3100
67,158,400
5.5700
5.6400
5.5500
5.5800
26,175,600
43 · 8-K
After-hours · 17:06 ET
8-K ↗
5.7700
5.8000
5.5700
5.5900
29,113,800
5.8700
5.9600
5.8000
5.8300
33,231,200
Weekend
Weekend
6.0600
6.1200
6.0000
6.0400
17,979,900
6.0500
6.1700
5.9200
6.0300
26,154,500
5.9600
6.1200
5.9000
6.0100
23,387,600
6.1500
6.2000
5.8100
5.8700
24,183,600
6.0400
6.2200
6.0400
6.1700
19,388,100
Weekend
Weekend
6.2000
6.2100
5.9000
5.9500
24,231,800
6.1000
6.2900
6.0600
6.2500
22,289,500
6.3100
6.3600
6.0500
6.1800
36,990,700
6.2500
6.4300
6.2400
6.2500
36,995,800
6.2700
6.3900
6.2200
6.2500
31,369,600
Weekend
Weekend
6.2000
6.2800
6.1500
6.1900
26,956,300
6.2200
6.2600
6.1300
6.2200
34,221,500
6.2900
6.3000
6.1500
6.1800
33,049,400
42 · 8-K
After-hours · 17:10 ET
8-K ↗
6.7000
6.7300
6.4400
6.4800
34,780,000
No trading
Weekend
Weekend
6.8200
6.8600
6.6500
6.8100
31,888,200
7.4600
7.5000
6.7900
6.8200
31,758,200
7.4500
7.6400
7.2400
7.3400
31,369,300
41 · DEFA14A
After-hours · 16:46 ET
DEFA14A ↗
40 · 8-K
After-hours · 16:44 ET
FORM 8-K ↗
7.6400
7.6600
7.3300
7.4500
37,851,200
6.9900
7.6400
6.9200
7.5800
61,589,700
Weekend
Weekend
6.8300
7.0600
6.7400
7.0400
30,467,600
6.6000
6.9300
6.6000
6.9100
28,600,400
6.6000
6.6700
6.5000
6.6200
26,458,000
6.5700
6.6400
6.4300
6.5400
24,651,500
6.4100
6.6400
6.4000
6.5500
32,588,900
Weekend
Weekend
6.2600
6.5000
6.1700
6.4000
31,209,300
6.1600
6.2200
6.0000
6.1700
33,872,000
5.9500
6.3900
5.9500
6.2300
46,340,800
39 · 10-Q
After-hours · 16:09 ET
10-Q ↗
6.3200
6.6900
6.2200
6.2500
65,009,300
38 · DEFA14A
Pre-market · 07:02 ET
DEFA14A ↗
37 · 8-K
Pre-market · 07:01 ET
FORM 8-K ↗
36 · 8-K
After-hours · 17:28 ET
8-K ↗
6.8200
6.9400
6.7200
6.8800
34,333,700
Weekend
Weekend
6.7400
6.8800
6.5800
6.8400
31,967,300
6.9000
6.9800
6.7400
6.8200
38,486,500
6.9200
6.9700
6.7400
6.9600
36,257,100
6.5700
6.8500
6.4600
6.7900
57,352,200
6.2200
6.5800
6.2200
6.5200
62,199,400
Weekend
Weekend
6.0900
6.1500
5.9900
6.1100
33,067,500
6.0300
6.1900
5.9700
6.0600
25,731,300
6.1400
6.1500
5.9600
6.0600
22,969,900
5.9100
6.0500
5.9000
6.0500
27,866,700
5.9500
5.9800
5.8200
5.8900
27,473,300
Weekend
Weekend
6.0300
6.0800
5.8500
5.9400
48,184,400
6.2100
6.3900
6.1600
6.3500
21,957,000
35 · 8-K
Pre-market · 06:25 ET
8-K ↗
6.1600
6.2700
6.0900
6.1500
25,003,900
6.5900
6.6100
6.1400
6.1700
30,358,000
34 · 8-K
Pre-market · 06:08 ET
8-K ↗
6.5600
6.7500
6.5400
6.6400
20,538,900
Weekend
Weekend
6.5500
6.6100
6.4800
6.5200
21,204,800
6.6800
6.8200
6.5200
6.5600
20,597,200
6.4100
6.7000
6.2900
6.7000
27,193,900
6.6100
6.7600
6.5300
6.6800
28,403,200
6.5200
6.6700
6.4900
6.5900
21,448,100
Weekend
Weekend
No trading
6.7400
7.0200
6.5200
6.5900
39,485,100
33 · 8-K
Pre-market · 06:19 ET
8-K ↗
6.5600
6.6800
6.4200
6.5000
44,224,600
32 · DEFA14A
After-hours · 16:35 ET
DEFA14A ↗
31 · DEF 14A
After-hours · 16:31 ET
DEF 14A ↗
6.6900
6.8900
6.4900
6.6300
36,529,300
7.0700
7.1400
6.6200
6.6500
42,145,500
Weekend
Weekend
6.8600
7.0400
6.8000
6.9300
38,369,600
6.7500
6.9500
6.7100
6.8900
31,589,800
6.6700
6.8500
6.6300
6.7700
34,625,200
6.5000
6.7200
6.4600
6.6300
35,576,700
6.1500
6.5100
6.1100
6.4600
47,645,700
Weekend
Weekend
30 · PRE 14A
After-hours · 16:15 ET
PRE 14A ↗
6.4400
6.5400
6.1900
6.2200
36,373,000
6.2100
6.6700
6.2000
6.4600
37,448,400
6.6100
6.6400
6.2300
6.2500
38,884,100
6.2500
6.6700
6.2500
6.5800
53,684,600
6.3400
6.3600
6.1400
6.2000
33,356,100
Weekend
Weekend
6.2800
6.4700
6.2600
6.3600
36,541,300
6.2700
6.3100
6.1500
6.2800
30,843,000
6.1000
6.3700
6.0500
6.3100
28,636,500
6.1500
6.3000
6.0700
6.1600
36,639,600
5.9400
6.2300
5.8600
6.1700
41,090,700
Weekend
Weekend
6.0100
6.1100
5.8500
5.9300
38,509,100
6.3400
6.3800
5.9500
6.1300
37,751,400
6.1500
6.4400
6.1200
6.3700
34,082,800
6.1200
6.2000
5.9400
6.1100
43,847,000
6.7200
6.7200
6.1500
6.2500
53,371,500
Weekend
Weekend
6.4600
6.5500
6.3600
6.4800
35,526,500
6.2900
6.4500
6.1600
6.3800
32,315,500
6.5900
6.6200
6.3200
6.4100
24,064,400
6.4600
6.6200
6.3400
6.5400
35,984,800
29 · 8-K
After-hours · 17:08 ET
8-K ↗
28 · 10-K
After-hours · 16:52 ET
10-K ↗
6.5700
6.9600
6.3700
6.3900
54,189,800
Weekend
Weekend
6.1500
6.5300
6.1100
6.5200
53,181,800
27 · 8-K
Next filing day · accepted 19 Feb, 19:54 ET
8-K ↗
6.2800
6.3900
6.1800
6.3600
67,266,800
6.2400
6.2700
6.1000
6.2200
73,354,100
6.4500
6.5100
6.0100
6.1400
83,287,200
26 · DEFA14A
Next filing day · accepted 13 Feb, 21:41 ET
DEFA14A ↗
No trading
Weekend
Weekend
6.0100
6.5700
5.8600
6.5400
98,174,700
5.9300
6.1300
5.7600
6.0300
106,866,300
5.6200
6.0500
5.5800
6.0000
130,711,400
25 · 8-K
Pre-market · 06:21 ET
8-K ↗
24 · DEFA14A
Next filing day · accepted 10 Feb, 20:37 ET
DEFA14A ↗
5.6000
5.6000
5.1800
5.4400
119,349,000
23 · DEFA14A
Pre-market · 08:58 ET
DEFA14A ↗
22 · 8-K
Pre-market · 08:57 ET
FORM 8-K ↗
5.2200
5.7700
5.1800
5.7100
183,262,100
21 · DEFA14A
Pre-market · 08:19 ET
DEFA14A ↗
20 · 8-K
Pre-market · 08:15 ET
FORM 8-K ↗
Weekend
Weekend
4.9800
5.4000
4.9600
5.3900
39,956,700
5.1000
5.1900
4.8700
4.9400
38,949,700
4.9800
5.3600
4.9800
5.3400
47,758,400
4.8500
5.0100
4.7900
4.9800
35,757,100
4.8300
4.9800
4.7500
4.8200
46,916,500
Weekend
Weekend
4.8700
5.0100
4.8500
4.9700
41,834,500
5.0000
5.1700
4.8000
4.9200
40,806,300
5.0500
5.1000
4.7800
4.8700
40,924,500
4.9300
5.0300
4.9000
4.9600
35,572,200
4.9300
5.0100
4.7800
4.9100
35,959,000
Weekend
Weekend
4.7600
4.9800
4.7200
4.8300
35,859,900
4.5600
4.7000
4.5400
4.7000
32,281,500
4.3700
4.7200
4.3500
4.6300
49,375,900
4.1500
4.3100
4.1500
4.3000
29,862,900
No trading
Weekend
Weekend
4.3600
4.3900
4.2300
4.2300
20,345,200
4.3200
4.4000
4.2900
4.3400
26,672,800
4.3000
4.4400
4.3000
4.3800
36,498,500
4.3400
4.4000
4.2500
4.2900
40,793,100
4.2300
4.3400
4.1900
4.2700
28,277,700
Weekend
Weekend
4.2900
4.3600
4.1600
4.2500
27,394,000
4.2300
4.3100
4.1700
4.2700
42,899,500
4.2700
4.3200
4.1500
4.2100
29,119,100
4.4000
4.4600
4.3000
4.3300
30,838,900
4.4300
4.4300
4.1000
4.3100
42,728,600
19 · 8-K
Pre-market · 06:59 ET
8-K ↗
Weekend
Weekend
4.1500
4.2900
4.0800
4.2400
25,841,100
No trading
4.1300
4.2100
4.1100
4.1300
23,176,800
4.1000
4.1800
4.0900
4.1300
24,077,400
4.0200
4.1500
4.0200
4.0700
23,293,800
Weekend
Weekend
4.0200
4.0400
3.9700
4.0200
18,758,800
No trading
4.0300
4.0600
3.9900
4.0100
14,709,400
4.0200
4.0500
3.9300
4.0300
27,081,300
4.0800
4.1900
3.9900
4.0100
21,694,600
Weekend
Weekend
3.9400
4.0100
3.9300
3.9700
42,318,000
3.9900
4.0100
3.8700
3.9200
28,585,400
3.8800
3.9800
3.8400
3.9500
35,688,600
4.0000
4.0100
3.7900
3.8400
44,566,600
4.1500
4.1600
4.0400
4.0800
30,968,100
Weekend
Weekend
4.3000
4.3700
4.1300
4.1300
33,739,100
4.2500
4.3800
4.2200
4.2800
31,128,900
4.3700
4.3900
4.1600
4.3000
50,756,300
4.4100
4.5600
4.4000
4.4500
25,334,500
18 · 8-K
After-hours · 17:26 ET
8-K ↗
4.4200
4.5100
4.3700
4.4400
18,603,700
Weekend
Weekend
4.4500
4.5500
4.4300
4.4400
20,598,100
4.5000
4.5000
4.3800
4.4300
22,811,800
4.3800
4.5000
4.3500
4.4500
31,726,100
4.3400
4.3900
4.2200
4.3100
27,410,900
4.3800
4.4900
4.3400
4.3500
32,912,000
Weekend
Weekend
4.3300
4.4300
4.2400
4.4100
19,312,500
No trading
4.1800
4.3600
4.0300
4.3000
35,923,800
4.0300
4.1000
3.9000
4.0500
37,720,600
3.9100
4.0700
3.8800
4.0200
34,240,800
Weekend
Weekend
3.8000
3.9200
3.6800
3.8900
39,422,300
4.1500
4.2200
3.8200
3.8400
45,377,800
4.0200
4.1400
3.9800
4.1000
29,122,600
4.0300
4.2000
3.9700
4.1300
39,681,500
17 · 8-K
Pre-market · 07:13 ET
8-K ↗
4.0200
4.2000
3.9500
4.0800
49,373,400
Weekend
Weekend
4.0100
4.1300
3.9600
4.0100
29,364,300
4.1300
4.2300
3.9800
4.0100
41,391,300
4.1800
4.2200
4.0900
4.1300
37,931,300
4.2300
4.3900
4.2200
4.2300
53,935,700
4.0400
4.2500
3.9700
4.2000
55,337,300
Weekend
Weekend
3.8900
3.9900
3.7900
3.9800
38,766,900
3.9100
3.9900
3.7600
3.9000
38,135,600
3.8600
3.9800
3.8600
3.9000
41,843,000
3.8100
3.9200
3.7500
3.9000
37,095,000
3.7800
4.0200
3.7200
3.9600
56,887,500
Weekend
Weekend
3.9200
3.9600
3.8300
3.8400
69,559,300
16 · 10-Q
After-hours · 16:56 ET
10-Q ↗
3.7800
4.0000
3.7200
3.9100
59,227,200
15 · 8-K
After-hours · 17:11 ET
8-K ↗
3.7500
3.9000
3.7300
3.8300
64,222,000
3.7800
3.8300
3.7300
3.7500
53,738,300
3.9200
3.9500
3.7800
3.8600
55,260,900
Weekend
Weekend
3.9000
4.0700
3.8700
3.9000
78,302,500
3.5300
3.9600
3.5000
3.8900
132,214,100
3.3300
3.4700
3.3200
3.4200
77,396,600
3.2900
3.3800
3.2200
3.3100
61,272,900
3.2800
3.4100
3.2600
3.2900
48,533,400
Weekend
Weekend
3.2100
3.2600
3.1400
3.2600
50,271,200
3.3300
3.3900
3.2000
3.2300
64,137,100
14 · 8-K
After-hours · 16:48 ET
8-K ↗
13 · 8-K
After-hours · 16:16 ET
8-K ↗
3.1600
3.3100
3.1500
3.3100
66,805,900
3.1500
3.1900
3.1000
3.1200
62,533,900
3.1700
3.2000
3.0800
3.2000
44,221,500
Weekend
Weekend
3.2700
3.3100
3.0700
3.0800
52,229,800
3.4100
3.4900
3.2800
3.3300
45,740,700
3.4500
3.4900
3.3500
3.4000
50,826,300
3.4300
3.4900
3.3600
3.4600
45,917,000
3.4500
3.5200
3.3700
3.4300
55,098,500
Weekend
Weekend
3.3000
3.4200
3.3000
3.3700
46,829,300
3.2300
3.3400
3.2200
3.3000
45,261,600
12 · 8-K
After-hours · 16:38 ET
8-K ↗
3.1400
3.2400
3.1100
3.2300
43,004,600
3.0500
3.1400
3.0300
3.1200
54,976,300
11 · 8-K
Pre-market · 08:53 ET
8-K ↗
3.1600
3.1700
3.0900
3.1100
59,647,600
Weekend
Weekend
3.1700
3.2400
3.1400
3.1900
71,885,000
10 · 8-K
Next filing day · accepted 25 Sep, 21:45 ET
8-K ↗
9 · 424B5
Next filing day · accepted 25 Sep, 21:37 ET
424B5 ↗
3.0600
3.2000
3.0600
3.1600
201,890,800
8 · 8-K
Next filing day · accepted 24 Sep, 21:39 ET
8-K ↗
7 · 424B5
After-hours · 16:06 ET
424B5 ↗
6 · 8-K
After-hours · 16:04 ET
8-K ↗
3.6500
3.7900
3.6200
3.6400
39,731,200
3.4500
3.8100
3.4400
3.5400
56,810,500
3.3200
3.4500
3.2700
3.3900
28,119,500
Weekend
Weekend
3.4700
3.4900
3.2800
3.3200
43,977,600
3.4500
3.4900
3.3600
3.4600
26,327,300
3.4500
3.5700
3.3800
3.4000
32,565,600
3.3600
3.4800
3.3300
3.4700
27,109,900
3.3500
3.4400
3.3000
3.3100
38,605,500
Weekend
Weekend
3.2800
3.3300
3.2400
3.3000
25,775,800
3.2000
3.2700
3.2000
3.2600
19,440,900
3.1500
3.2500
3.1200
3.2400
24,291,200
3.1800
3.2400
3.1200
3.1400
18,648,200
3.1100
3.2200
3.0100
3.1600
28,133,200
Weekend
Weekend
3.0700
3.1400
3.0300
3.0700
20,104,300
2.9600
3.1100
2.9300
3.1000
25,638,700
3.0200
3.0800
2.9600
2.9900
24,023,200
3.0100
3.1000
2.9900
3.0600
26,504,800
No trading
Weekend
Weekend
3.0900
3.1200
3.0200
3.0300
24,473,200
3.2000
3.2000
3.0700
3.1000
24,238,500
5 · 8-K
After-hours · 16:16 ET
8-K ↗
3.0200
3.2100
3.0200
3.1700
28,351,500
3.0800
3.1300
3.0200
3.0400
14,627,600
3.0800
3.1300
3.0500
3.1000
19,229,300
Weekend
Weekend
2.8600
3.0900
2.8500
3.0400
29,762,500
2.7800
2.8600
2.7600
2.8300
15,638,900
2.8500
2.8600
2.7700
2.8000
20,988,400
4 · 8-K
After-hours · 16:21 ET
8-K ↗
2.9500
2.9900
2.8200
2.8400
13,790,400
2.9400
2.9600
2.8800
2.9500
17,714,200
Weekend
Weekend
3.0200
3.0200
2.9400
2.9500
14,576,200
2.9600
3.0500
2.9000
3.0100
24,304,100
2.9600
3.0200
2.9100
3.0100
19,485,700
2.9300
3.0000
2.9000
2.9400
17,663,200
3.1000
3.1300
2.9000
2.9100
20,806,700
3 · 8-K
Pre-market · 07:41 ET
8-K ↗
Weekend
Weekend
3.0000
3.1200
2.9600
3.1000
24,031,200
3.1000
3.1300
2.9100
2.9500
23,248,900
2.9700
3.1600
2.9600
3.0300
38,921,700
2 · 10-Q
After-hours · 16:20 ET
10-Q ↗
2.8600
2.9400
2.7700
2.9100
29,165,700
1 · 8-K
After-hours · 16:37 ET
8-K ↗
2.8000
2.8400
2.7500
2.8100
21,780,100
Weekend
Weekend
2.8500
2.8500
2.7200
2.8200
28,499,200
2.9000
3.0000
2.8800
2.9200
24,100,700
3.0200
3.0300
2.8800
2.9500
25,105,700
3.0500
3.0600
2.9200
3.0400
32,202,200
3.0300
3.0800
3.0000
3.0600
24,326,300
Weekend
Weekend
3.0800
3.0900
2.9600
3.0000
21,536,200
3.0600
3.1400
3.0200
3.0800
30,821,500
2.9100
3.1000
2.9100
3.0900
35,556,300
Announcement Events
Each title opens the filing on the SEC website. Registered users can summarise the filing and up to seven relevant exhibits linked within the same SEC submission.