C3is Inc CISS

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C3is Inc. - Common Stock · Company · Nasdaq

Paper trade (simulated — no real money)

Fill: USD 0.5200 · FX 1 USD = 1.290100 SGD · about SGD 0.6709 per unit

Sign in to place simulated trades. USD fills are converted into the SGD portfolio at the displayed rate.

Announcement types: (default: consequential filings)
Results & current reports
Capital markets
Ownership & governance

USD closing-price chart (daily close from yfinance · Last year)

USD 462.98 → 0.52 · -99.9%
569.800285.1600.520 1 2,3,4,5 6 7 8,9 10 11 12 13 14 15,16,17,18,19 20,21,22,23,24 25,26,27,28,29 30,31,32,33,34 35,36,37,38,39 40,41,42,43,44,45 46 47 48 49,50,51,52,53 54 55,56 57 Jul 25Oct 25Jan 26Apr 26Jul 26

Numbered dotted lines mark the filtered filings under Announcement Events below.

Price & SEC Filing History 26 Jul 2025 — 27 Jul 2026 (Last year)

Daily Nasdaq 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.

No data yet
Weekend
Weekend
0.8900 0.8900 0.4110 0.5200 5,041,900
57 · F-1/A After-hours · 16:02 ET F-1/A ↗
1.2800 1.3760 0.9500 0.9620 930,800
56 · F-1 After-hours · 17:16 ET F-1 ↗ 55 · 6-K After-hours · 17:01 ET 6-K ↗
1.6600 1.6800 1.6200 1.6300 108,700
1.6300 1.8300 1.5900 1.6200 44,200
1.6900 1.6900 1.5500 1.6700 34,100
Weekend
Weekend
1.7500 1.7900 1.6600 1.7100 24,000
1.7100 1.8400 1.6600 1.7700 76,200
1.5300 1.7200 1.5000 1.6800 83,000
1.6800 1.7400 1.5200 1.5700 451,800
1.8100 1.8160 1.5600 1.6100 58,800
Weekend
Weekend
1.7100 1.8000 1.7000 1.7500 27,600
1.7300 1.7500 1.6700 1.7500 17,800
1.7800 1.7800 1.6400 1.7000 37,600
1.8800 1.8800 1.7200 1.7200 73,900
1.8200 1.8800 1.7400 1.8800 55,900
Weekend
Weekend
No trading
1.7000 1.8100 1.6500 1.7900 261,200
1.7100 1.8200 1.6700 1.7300 59,600
1.6300 1.7200 1.5600 1.6600 59,900
1.7500 1.7500 1.6500 1.6500 32,800
Weekend
Weekend
1.6600 1.8600 1.6400 1.6800 132,600
1.6900 1.7200 1.5800 1.6400 111,700
1.8100 1.8100 1.5400 1.7200 220,100
2.0000 2.0000 1.7800 1.8700 197,100
54 · 6-K After-hours · 17:00 ET 6-K ↗
2.1800 2.1800 2.0500 2.1200 114,300
Weekend
Weekend
No trading
2.2000 2.2500 2.1300 2.2000 188,600
2.1800 2.2400 2.0700 2.2200 193,800
2.2700 2.3500 2.1900 2.2700 334,200
2.1700 2.3600 2.0800 2.2500 457,300
Weekend
Weekend
2.2700 2.3900 1.9100 2.0800 526,000
2.1700 2.2900 2.1200 2.2700 324,100
2.2100 2.2900 2.1300 2.2300 203,700
2.1000 2.3100 2.0820 2.2400 436,000
2.0800 2.2200 2.0700 2.1200 119,700
Weekend
Weekend
2.0900 2.1700 2.0100 2.1400 75,400
2.0300 2.2600 2.0300 2.1800 213,400
2.4500 2.5700 1.9000 2.2100 6,555,600
2.3400 2.3400 2.1700 2.2000 270,600
2.3400 2.3900 2.2100 2.2200 83,300
Weekend
Weekend
2.3500 2.4100 2.1900 2.2800 126,900
2.2400 2.3400 2.1600 2.3200 132,900
2.3700 2.4000 2.2200 2.2300 87,000
2.3500 2.4900 2.2500 2.3600 135,700
No trading
Weekend
Weekend
2.5400 2.5890 2.3550 2.3600 122,300
2.6100 2.7200 2.5100 2.5400 85,300
2.5000 2.7800 2.3600 2.6300 182,900
2.8400 2.8500 2.3600 2.5700 603,700
4.8850 6.0600 3.0600 3.1700 28,934,400
53 · 424B3 Pre-market · 09:17 ET 424B3 ↗ 52 · 424B3 Pre-market · 09:15 ET 424B3 ↗ 51 · 424B3 Pre-market · 09:14 ET 424B3 ↗ 50 · 424B3 Pre-market · 09:13 ET 424B3 ↗ 49 · 6-K Pre-market · 09:11 ET 6-K ↗
Weekend
Weekend
3.1600 3.2700 3.0500 3.0500 29,800
3.2000 3.2750 3.1720 3.1900 11,900
3.2700 3.2700 3.1800 3.2300 18,400
3.3700 3.3800 3.2800 3.3100 11,300
3.3100 3.3930 3.2150 3.3200 20,700
Weekend
Weekend
3.3300 3.3700 3.2300 3.2900 14,300
3.4100 3.4250 3.2500 3.3200 33,000
3.3500 3.5000 3.3100 3.4600 38,000
3.4700 3.4700 3.2800 3.3700 37,900
3.2600 3.6300 3.1700 3.4800 72,000
Weekend
Weekend
3.3500 3.4100 3.2300 3.3000 89,000
3.2200 3.4100 2.8100 3.4100 64,500
3.5000 3.5640 3.1700 3.2200 48,300
3.3000 3.6500 3.0200 3.5900 160,300
48 · 6-K After-hours · 16:01 ET 6-K ↗
2.8400 3.4900 2.7000 3.4210 102,400
Weekend
Weekend
3.1780 3.1780 2.8910 2.9540 79,757
47 · 6-K After-hours · 16:15 ET 6-K ↗
5.1100 5.1100 2.8700 3.0100 332,029
46 · 20-F After-hours · 16:15 ET 20-F ↗
5.6280 5.6840 5.3900 5.5160 11,029
5.8730 5.8800 5.5510 5.6630 11,243
5.7400 5.8450 5.6000 5.7680 11,414
Weekend
Weekend
5.9010 6.0970 5.6000 5.6140 12,486
6.0900 6.1320 5.6700 5.8100 19,571
5.6910 5.9640 5.6560 5.9080 16,786
5.7610 5.9640 5.6420 5.7540 14,586
5.5160 5.7400 5.3970 5.7400 20,786
Weekend
Weekend
5.4600 5.8590 5.4600 5.7330 14,329
5.3760 5.8030 5.3760 5.5720 14,171
5.5300 5.7330 5.5300 5.5370 7,671
5.6000 5.6980 5.3200 5.5300 18,029
5.8800 5.8800 5.6700 5.7470 9,557
Weekend
Weekend
No trading
5.4600 5.8940 5.4110 5.7120 11,271
5.6350 5.8100 5.5860 5.7260 11,414
5.6700 5.8100 5.5300 5.7890 11,543
5.6000 5.7400 5.4600 5.5650 15,829
Weekend
Weekend
5.8800 6.0900 5.5650 5.6000 16,800
5.9850 6.2230 5.6840 5.7470 14,200
6.0830 6.2230 5.6770 5.9920 10,743
5.7470 6.3000 5.6700 5.9850 29,686
5.9080 6.3000 5.4600 5.8940 31,629
Weekend
Weekend
6.0200 6.3770 5.8450 5.9360 34,214
6.6570 6.6990 5.8100 6.0550 1,056,757
5.4320 6.1880 5.3200 5.6000 137,914
6.4400 6.4400 5.2500 5.2500 73,443
7.8400 7.8400 6.3000 6.5310 76,429
Weekend
Weekend
7.7350 7.9100 7.7000 7.8400 19,157
7.9100 8.0500 7.6650 7.7700 39,557
8.1900 8.4700 7.8400 7.9100 49,771
8.3300 9.9400 7.6300 7.9800 380,671
8.4000 8.6800 7.9800 8.2600 57,886
Weekend
Weekend
9.8000 9.8700 8.4700 8.6800 120,714
10.1500 11.0600 9.8700 10.0100 204,314
10.3600 10.9760 10.1500 10.1500 162,514
11.6900 12.2500 10.4300 11.4100 1,094,286
11.7600 11.8300 10.4300 10.7800 470,929
Weekend
Weekend
10.5700 11.0600 10.5700 10.7800 37,300
10.8500 11.0600 10.4300 10.5000 65,529
45 · 424B3 After-hours · 16:37 ET 424B3 ↗ 44 · 424B3 After-hours · 16:36 ET 424B3 ↗ 43 · 424B3 After-hours · 16:35 ET 424B3 ↗ 42 · 424B3 After-hours · 16:34 ET 424B3 ↗ 41 · 6-K After-hours · 16:32 ET 6-K ↗ 40 · 424B5 After-hours · 16:29 ET 424B5 ↗
12.1100 12.7750 12.0400 12.3200 78,300
12.5300 12.7400 11.9700 12.3200 50,900
13.0200 13.8600 12.7260 13.0200 79,029
Weekend
Weekend
12.7400 13.9300 11.9070 13.5800 201,386
13.0900 19.2500 12.8800 15.3300 5,716,514
39 · 424B3 Pre-market · 09:26 ET 424B3 ↗ 38 · 424B3 Pre-market · 09:24 ET 424B3 ↗ 37 · 424B3 Pre-market · 09:23 ET 424B3 ↗ 36 · 424B3 Pre-market · 09:22 ET 424B3 ↗ 35 · 6-K Pre-market · 09:20 ET 6-K ↗
10.5000 12.0400 10.2200 11.6900 42,600
10.3600 11.1300 10.3600 10.6400 21,086
No trading
Weekend
Weekend
10.3600 10.7590 10.0800 10.5700 31,357
11.4100 11.5150 10.7100 10.8500 28,086
11.2700 12.7750 9.9400 11.5500 76,471
11.6900 12.3900 11.2000 11.8300 56,957
13.0900 13.9300 11.2000 11.6200 97,457
Weekend
Weekend
12.2500 13.3700 12.2500 12.9500 220,329
13.8600 17.0100 13.3000 13.7200 10,194,043
11.3400 11.5500 10.5140 10.6400 350,843
11.3400 13.0060 9.8000 11.6200 255,357
17.5700 20.0900 11.2000 13.6500 5,974,571
Weekend
Weekend
12.7400 16.1700 9.4150 12.8100 4,115,171
12.1100 12.1100 9.4500 10.0800 96,429
13.8250 14.7700 11.6900 12.2500 318,657
12.1100 13.4400 11.9700 13.0200 56,786
34 · 424B3 After-hours · 16:05 ET 424B3 ↗ 33 · 424B3 After-hours · 16:04 ET 424B3 ↗ 32 · 424B3 After-hours · 16:03 ET 424B3 ↗ 31 · 424B3 After-hours · 16:03 ET 424B3 ↗ 30 · 6-K After-hours · 16:01 ET 6-K ↗
11.6900 17.5000 11.4100 14.4200 166,514
Weekend
Weekend
11.9000 13.1600 11.4800 11.9000 95,257
13.1600 14.1400 11.4800 12.7400 172,007
29 · 424B3 Pre-market · 08:55 ET 424B3 ↗ 28 · 424B3 Pre-market · 08:53 ET 424B3 ↗ 27 · 424B3 Pre-market · 08:50 ET 424B3 ↗ 26 · 424B3 Pre-market · 08:47 ET 424B3 ↗ 25 · 6-K Pre-market · 08:43 ET 6-K ↗
17.5000 20.1600 16.9400 19.7400 30,343
24 · 424B3 After-hours · 16:59 ET 424B3 ↗ 23 · 424B3 After-hours · 16:57 ET 424B3 ↗ 22 · 424B3 After-hours · 16:55 ET 424B3 ↗ 21 · 424B3 After-hours · 16:54 ET 424B3 ↗ 20 · 6-K After-hours · 16:51 ET 6-K ↗
17.9200 19.4600 16.8000 18.2000 44,126
No trading
Weekend
Weekend
17.3600 18.6200 17.3600 17.9200 58,059
19.3200 19.6000 17.2200 19.1800 30,593
20.8600 21.2800 17.0800 19.3200 49,774
27.0200 27.4400 20.0200 20.8600 33,161
29.4000 30.6600 27.0200 27.1600 10,021
Weekend
Weekend
31.2200 32.2000 29.2600 30.6600 11,681
33.6000 33.7400 31.3600 31.9200 4,946
33.6000 34.4400 32.3400 33.1800 5,397
32.2000 34.4400 30.9400 33.0400 4,974
33.1800 33.1800 31.5000 32.3400 4,913
Weekend
Weekend
32.2000 33.1800 30.9400 31.5000 6,126
No trading
32.2000 32.2000 30.1000 32.2000 10,037
29.6800 34.3000 29.5400 32.2000 33,134
30.1000 30.3800 29.2600 30.1000 5,766
Weekend
Weekend
30.3800 30.6600 29.4000 29.5400 4,493
No trading
30.8000 31.3600 30.1000 30.3800 2,952
31.9200 32.0600 30.8000 30.8000 5,971
32.9000 33.6000 30.1000 32.3400 8,456
Weekend
Weekend
19 · 424B3 After-hours · 17:13 ET 424B3 ↗ 18 · 424B3 After-hours · 17:06 ET 424B3 ↗ 17 · 424B3 After-hours · 17:04 ET 424B3 ↗ 16 · 424B3 After-hours · 17:00 ET 424B3 ↗ 15 · 6-K After-hours · 16:05 ET 6-K ↗
31.2200 31.9200 29.5400 31.0800 7,572
32.4800 33.6000 29.9600 31.9200 8,646
30.8000 30.9400 28.5600 30.1000 13,121
29.4000 39.2000 28.1400 32.2000 58,425
35.0000 35.0000 28.0000 29.8200 28,895
Weekend
Weekend
14 · 6-K After-hours · 16:30 ET 6-K ↗
42.0000 43.5400 32.7600 35.0000 41,497
13 · 424B4 After-hours · 17:01 ET 424B4 ↗
49.0000 56.0000 43.4000 46.2000 82,616
242.2000 256.2000 232.4000 239.4000 481
245.0000 257.3200 239.4000 245.0000 256
253.4000 264.1800 243.6000 246.4000 359
Weekend
Weekend
12 · F-1/A After-hours · 16:31 ET F-1/A ↗
267.4000 271.6000 257.6000 260.4000 330
247.8000 268.8000 246.4000 263.3400 618
250.6000 252.0000 247.8000 247.8000 221
240.8000 259.0000 239.4000 250.6000 384
247.8000 247.8000 238.0000 239.4000 299
Weekend
Weekend
238.0000 266.0000 235.9000 247.8000 258
No trading
229.6000 239.4000 228.2000 236.6000 179
231.0000 232.4000 225.4000 228.2000 365
218.4000 229.6000 215.6000 227.5000 238
Weekend
Weekend
205.8000 218.4000 205.8000 218.4000 136
226.8000 228.2000 204.4000 205.8000 249
245.0000 253.4000 221.2000 231.0000 284
11 · 6-K After-hours · 16:05 ET 6-K ↗
240.8000 245.0000 224.0000 235.2000 340
236.6000 246.9600 231.0000 235.2000 543
Weekend
Weekend
246.4000 253.4000 231.0000 231.0000 640
273.0000 282.8000 219.8000 247.8000 1,274
273.0000 277.2000 267.4000 273.0000 233
287.0000 287.0000 273.0000 277.2000 431
284.2000 284.2000 270.2000 273.0000 341
Weekend
Weekend
268.8000 282.8000 254.8000 277.2000 812
274.4000 276.6400 267.4000 275.1000 365
273.0000 278.6000 266.0000 273.0000 602
292.6000 295.6800 267.4000 270.2000 1,547
10 · F-1/A After-hours · 16:16 ET F-1/A ↗
298.2000 304.3600 292.6000 301.0000 536
Weekend
Weekend
299.6000 303.8000 292.6000 303.8000 644
302.4000 308.7000 295.4000 299.6000 276
312.2000 312.2000 292.6000 302.4000 894
289.8000 301.0000 289.8000 301.0000 3,792
295.4000 299.6000 294.0000 296.8000 331
Weekend
Weekend
295.4000 301.0000 294.0000 299.6000 529
294.0000 305.2000 287.0000 303.8000 1,580
302.4000 306.6000 298.2000 299.6000 690
303.8000 311.5000 289.8000 305.2000 1,186
302.4000 310.8000 299.6000 305.2000 1,206
Weekend
Weekend
301.0000 340.2000 284.2000 308.0000 13,986
298.2000 299.6000 288.4000 289.8000 800
303.8000 306.6000 288.4000 294.0000 2,136
312.2000 315.0000 302.4000 308.0000 1,228
329.0000 329.0000 302.4000 302.4000 1,456
Weekend
Weekend
345.8000 362.6000 294.0000 312.2000 3,832
368.2000 375.7600 341.6000 343.0000 3,454
9 · 6-K Pre-market · 07:38 ET 6-K ↗ 8 · 424B5 Pre-market · 07:36 ET 424B5 ↗
380.8000 413.0000 348.6000 361.2000 15,326
450.8000 831.6000 429.8000 569.8000 667,551
317.8000 317.8000 299.6000 309.4000 450
Weekend
Weekend
315.0000 322.0000 310.8000 313.6000 266
302.4000 313.6000 302.4000 312.2000 236
299.6000 308.0000 292.6000 304.5000 338
293.7200 312.0600 292.6000 300.1600 209
291.2000 315.0000 280.0000 298.2000 926
7 · 6-K Pre-market · 08:00 ET 6-K ↗
Weekend
Weekend
301.0000 305.9000 299.6000 301.0000 165
310.8000 310.8000 298.2000 301.0000 341
305.2000 322.0000 301.0000 309.4000 727
313.6000 313.6000 301.0000 301.0000 377
313.6000 322.0000 296.8000 320.6000 1,512
Weekend
Weekend
316.4000 327.6000 309.4000 320.6000 974
341.6000 341.6000 309.4000 329.0000 2,649
322.0000 357.0000 315.0000 340.2000 67,591
316.4000 390.6000 309.4000 371.0000 2,328
317.8000 327.6000 304.5000 316.4000 286
Weekend
Weekend
319.2000 319.2000 308.5600 317.8000 222
306.6000 319.2000 303.8000 319.2000 486
298.2000 305.2000 292.6000 303.8000 1,164
295.4000 295.4000 285.6000 287.0000 3,990
292.6000 299.6000 284.2000 295.4000 398
Weekend
Weekend
305.2000 308.0000 291.2000 292.6000 603
345.8000 379.4000 301.0000 302.4000 1,090
6 · F-1 After-hours · 16:31 ET F-1 ↗
387.8000 408.8000 387.8000 401.8000 313
5 · 424B3 After-hours · 16:07 ET 424B3 ↗ 4 · 424B3 After-hours · 16:06 ET 424B3 ↗ 3 · 424B3 After-hours · 16:05 ET 424B3 ↗ 2 · 6-K After-hours · 16:01 ET 6-K ↗
417.2000 417.2000 387.8000 408.1000 396
No trading
Weekend
Weekend
404.6000 422.1000 404.6000 421.8200 96
1 · 6-K Pre-market · 06:05 ET 6-K ↗
431.2000 431.2000 418.6000 418.6000 114
420.0000 432.6000 420.0000 420.2800 121
429.8000 435.9600 413.0000 420.0000 133
424.2000 441.7000 413.8400 429.8000 201
Weekend
Weekend
432.6000 446.4600 422.8000 424.2000 308
474.6000 474.6000 403.2000 428.4000 1,165
473.2000 506.8000 436.8000 485.8000 1,145
480.2000 532.0000 442.8200 483.0000 31,474
458.5000 464.8000 453.6000 462.0000 59
Weekend
Weekend
457.8000 471.8000 450.8000 462.0000 96
457.8000 457.8000 439.6000 449.4000 176
459.2000 459.2000 441.0000 452.2000 46
435.4000 470.4000 435.4000 446.6000 574
443.8000 448.0000 434.0000 435.4000 179
Weekend
Weekend
483.0000 483.0000 443.8000 448.0000 214
488.6000 494.2000 476.0000 477.4000 70
464.8000 522.2000 455.0000 491.4000 437
451.5000 485.5200 442.4000 465.5000 244
441.0000 466.2000 441.0000 442.4000 116
Weekend
Weekend
448.0000 450.8000 441.0000 443.8000 164
446.6000 453.6000 441.0000 448.0000 174
442.4000 454.5800 442.4000 450.8000 72
467.6000 467.6000 448.0000 450.8000 114
469.0000 472.7800 457.8000 462.9800 144
Weekend
Weekend

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.