Quartzsea Acquisition Corporation QSEA

Open calendar →

Quartzsea Acquisition Corporation - Ordinary Shares · Company · Nasdaq · Financial Services / Shell Companies

Paper trade (simulated — no real money)

Fill: USD 10.7100 · FX 1 USD = 1.277900 SGD · about SGD 13.6863 per unit

Sign in to practise with simulated trades before investing real money. 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 10.17 → 10.71 · 5.3%
10.74010.44010.140 1 2 3 4 5 6,7 8 9,10 11 12 13 14 15 16 17 18 19 20 Oct 25Jan 26Apr 26Jul 26Oct 26

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

Price & SEC Filing History 24 Oct 2025 — 25 Oct 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.

Weekend
Weekend
10.7100 10.7100 10.7100 10.7100 2,488
10.7100 10.7250 10.7100 10.7250 1,000
10.7400 10.7400 10.7400 10.7400 400
20 · 8-K After-hours · 20:50 ET 8-K ↗
10.7200 10.7200 10.7200 10.7200 0
19 · 8-K After market open · 13:02 ET 8-K ↗
10.6900 10.7500 10.6800 10.7200 17,200
Weekend
Weekend
10.6600 10.6600 10.6600 10.6600 0
10.6600 10.6600 10.6600 10.6600 0
10.7100 10.7100 10.6600 10.6600 4,600
10.7100 10.7100 10.7100 10.7100 100
10.6600 10.6600 10.6600 10.6600 300
Weekend
Weekend
18 · 10-Q After-hours · 20:39 ET 10-Q ↗
10.7100 10.7100 10.6700 10.7100 800
10.7000 10.7000 10.6800 10.6800 1,300
10.6700 10.7100 10.6700 10.7100 116,700
10.7200 10.7200 10.7200 10.7200 0
10.7200 10.7200 10.7200 10.7200 200
Weekend
Weekend
10.7000 10.7000 10.6800 10.6950 15,000
10.7200 10.7200 10.7100 10.7100 4,600
10.7000 10.7100 10.6800 10.6800 16,100
10.6400 10.6900 10.6400 10.6900 86,800
17 · DEF 14A Pre-market · 01:59 ET DEF 14A ↗
10.6600 10.6600 10.6600 10.6600 400
Weekend
Weekend
10.6400 10.6400 10.6400 10.6400 1,000
10.6500 10.6500 10.6400 10.6500 1,100
10.6400 10.6500 10.6400 10.6500 2,200
10.6400 10.6400 10.6400 10.6400 43,500
16 · 8-K After-hours · 16:30 ET 8-K ↗
10.6400 10.6400 10.6400 10.6400 1,200
Weekend
Weekend
10.6500 10.6600 10.6500 10.6500 3,900
10.6390 10.6500 10.6350 10.6450 2,100
15 · PRE 14A Next filing day · accepted 16 Sep, 21:28 ET PRE 14A ↗
10.6300 10.6300 10.6300 10.6300 300
10.6200 10.6400 10.6200 10.6400 4,800
10.6300 10.6300 10.6300 10.6300 4,700
Weekend
Weekend
10.6400 10.6400 10.6400 10.6400 0
10.6300 10.6400 10.6300 10.6400 2,200
10.6100 10.6100 10.6100 10.6100 0
10.6100 10.6100 10.6100 10.6100 0
No trading
Weekend
Weekend
10.6100 10.6100 10.6100 10.6100 0
10.6100 10.6100 10.6100 10.6100 0
10.6100 10.6100 10.6100 10.6100 0
10.6100 10.6100 10.6100 10.6100 0
10.6100 10.6100 10.6100 10.6100 0
Weekend
Weekend
10.6200 10.6250 10.6100 10.6100 3,100
10.6000 10.6000 10.6000 10.6000 0
10.6000 10.6000 10.6000 10.6000 0
14 · 8-K After-hours · 17:30 ET 8-K ↗
10.6000 10.6000 10.6000 10.6000 1,000
10.6200 10.6200 10.6200 10.6200 0
Weekend
Weekend
10.6200 10.6200 10.6200 10.6200 0
10.6200 10.6200 10.6200 10.6200 0
10.6200 10.6200 10.6200 10.6200 0
10.6400 10.6400 10.5800 10.6200 5,200
10.6500 10.6500 10.6500 10.6500 0
Weekend
Weekend
10.6500 10.6500 10.6500 10.6500 0
10.6500 10.6500 10.6500 10.6500 0
10.6500 10.6500 10.6500 10.6500 0
10.6500 10.6500 10.6500 10.6500 0
10.6500 10.6500 10.6500 10.6500 0
Weekend
Weekend
10.6500 10.6500 10.5700 10.6500 7,000
10.6200 10.6200 10.6200 10.6200 0
10.6200 10.6200 10.6200 10.6200 0
10.6150 10.6200 10.6150 10.6200 51,000
10.6300 10.6300 10.6300 10.6300 75,600
Weekend
Weekend
10.5860 10.6200 10.5860 10.6200 1,800
10.6600 10.6600 10.6600 10.6600 0
10.5750 10.6600 10.5700 10.6600 16,500
10.5700 10.5800 10.5700 10.5700 5,700
10.5800 10.5800 10.5800 10.5800 0
Weekend
Weekend
10.5800 10.5800 10.5800 10.5800 200
10.5600 10.5600 10.5600 10.5600 1,100
10.5600 10.5600 10.5600 10.5600 0
10.5400 10.5600 10.5400 10.5600 25,300
10.5360 10.5360 10.5360 10.5360 200
Weekend
Weekend
10.5400 10.5400 10.5400 10.5400 1,100
10.5600 10.5700 10.5600 10.5670 3,300
10.5600 10.5600 10.5600 10.5600 1,000
10.5300 10.5400 10.5250 10.5300 7,000
13 · 10-Q Next filing day · accepted 13 Jul, 18:11 ET 10-Q ↗
10.5460 10.5460 10.5460 10.5460 0
Weekend
Weekend
10.5460 10.5460 10.5460 10.5460 0
10.5460 10.5460 10.5460 10.5460 200
10.5300 10.5300 10.5300 10.5300 0
10.5300 10.5300 10.5300 10.5300 0
10.5300 10.5300 10.5300 10.5300 500
Weekend
Weekend
No trading
10.5500 10.5500 10.5500 10.5500 0
10.3900 10.5500 10.3900 10.5500 110,000
10.5200 10.5200 10.5200 10.5200 6,700
10.5500 10.5500 10.5500 10.5500 0
Weekend
Weekend
10.5500 10.5500 10.5500 10.5500 0
10.5700 10.5700 10.5200 10.5500 43,100
10.5200 10.5400 10.5200 10.5200 55,000
12 · 8-K Next filing day · accepted 23 Jun, 19:52 ET 8-K ↗
10.5200 10.5200 10.5200 10.5200 0
10.5300 10.5800 10.5000 10.5200 13,400
Weekend
Weekend
No trading
10.5000 10.5200 10.5000 10.5200 800
11 · 8-K Next filing day · accepted 17 Jun, 17:54 ET 8-K ↗
10.5600 10.5600 10.5150 10.5150 4,600
10 · 8-K/A After-hours · 17:20 ET 8-K/A ↗ 9 · 8-K After market open · 11:09 ET 8-K ↗
10.4900 10.5200 10.4900 10.5000 500
10.5200 10.5200 10.5150 10.5200 1,500
Weekend
Weekend
10.5100 10.5100 10.5100 10.5100 600
10.5400 10.5400 10.4900 10.4900 28,300
10.5000 10.5400 10.4900 10.4900 257,500
10.5000 10.5000 10.4920 10.5000 900
10.4800 10.5000 10.4800 10.5000 1,600
Weekend
Weekend
10.5000 10.5000 10.4900 10.5000 19,500
10.4900 10.5000 10.4900 10.5000 6,000
10.4900 10.5000 10.4900 10.5000 5,600
10.4800 10.5000 10.4800 10.5000 7,100
10.5300 10.5300 10.4800 10.4900 697,600
Weekend
Weekend
10.4700 10.8550 10.4450 10.4900 116,700
8 · DEF 14A Pre-market · 06:02 ET DEF 14A ↗
10.4450 10.4700 10.4450 10.4450 501,900
10.4700 10.4700 10.4700 10.4700 0
10.4100 10.4700 10.4100 10.4700 400
No trading
Weekend
Weekend
10.4600 10.4600 10.4600 10.4600 0
10.4600 10.4700 10.4600 10.4600 12,200
10.4500 10.4500 10.4500 10.4500 600,100
10.4500 10.4500 10.4500 10.4500 17,300
10.4500 10.4500 10.4300 10.4300 23,800
Weekend
Weekend
7 · PRE 14A After-hours · 17:08 ET PRE 14A ↗
10.4100 10.4500 10.4100 10.4500 300
6 · 8-K Next filing day · accepted 14 May, 21:29 ET 8-K ↗
10.5000 10.5000 10.4100 10.4300 1,101,000
10.4000 10.4600 10.4000 10.4600 3,200
10.4100 10.4100 10.4100 10.4100 23,800
10.4100 10.4500 10.4100 10.4500 3,600
Weekend
Weekend
10.4100 10.4200 10.4100 10.4200 53,100
10.4100 10.4200 10.4100 10.4200 1,900
10.4100 10.4200 10.4100 10.4200 29,500
10.4100 10.4300 10.3900 10.4200 2,100
10.3900 10.4100 10.3800 10.4100 1,700
Weekend
Weekend
10.3800 10.4000 10.3800 10.4000 9,100
10.3800 10.4100 10.3800 10.4100 1,400
10.4000 10.4100 10.3900 10.4000 26,800
10.3800 10.3880 10.3800 10.3880 1,000
10.3800 10.3800 10.3800 10.3800 800
Weekend
Weekend
10.3900 10.4000 10.3800 10.4000 2,000
5 · 10-Q After market open · 13:21 ET 10-Q ↗
10.3700 10.4100 10.3700 10.4000 3,800
10.4200 10.4200 10.3700 10.3700 1,100
10.3700 10.4100 10.3700 10.4100 2,100
10.3900 10.3900 10.3900 10.3900 0
Weekend
Weekend
10.3700 10.4000 10.3700 10.3900 9,400
10.3700 10.3900 10.3700 10.3900 1,400
10.3900 10.3900 10.3850 10.3850 2,100
10.3800 10.3800 10.3700 10.3700 2,900
10.3700 10.3700 10.3700 10.3700 1,100
Weekend
Weekend
10.3600 10.3700 10.3600 10.3700 1,200
10.3600 10.3900 10.3600 10.3900 1,700
4 · 10-K/A Next filing day · accepted 08 Apr, 18:26 ET 10-K/A ↗
10.3600 10.3700 10.3600 10.3700 5,300
10.3600 10.3700 10.3600 10.3700 2,200
10.3600 10.3700 10.3600 10.3600 1,600
Weekend
Weekend
No trading
10.3700 10.3700 10.3700 10.3700 5,100
10.3700 10.3700 10.3700 10.3700 1,600
10.3700 10.3700 10.3600 10.3700 17,800
10.3600 10.3600 10.3600 10.3600 1,400
Weekend
Weekend
10.3650 10.3650 10.3650 10.3650 4,000
10.3400 10.3650 10.3400 10.3650 2,000
10.3600 10.3600 10.3600 10.3600 1,700
10.3400 10.3600 10.3400 10.3600 36,200
10.3300 10.3500 10.3300 10.3300 2,000
Weekend
Weekend
10.3500 10.3600 10.3500 10.3600 2,300
10.3600 10.3600 10.3300 10.3540 1,900
3 · 8-K After-hours · 16:05 ET 8-K ↗
10.2900 10.3500 10.2700 10.3500 26,400
10.3500 10.3500 10.3300 10.3300 1,200
2 · 10-K After-hours · 17:12 ET 10-K ↗
10.3300 10.3400 10.3300 10.3400 1,300
Weekend
Weekend
10.3300 10.3300 10.3300 10.3300 2,400
10.3300 10.3300 10.3300 10.3300 300
1 · 8-K After market open · 13:55 ET 8-K ↗
10.3300 10.3300 10.3300 10.3300 400
10.3200 10.3300 10.3200 10.3300 3,100
10.3300 10.3300 10.3300 10.3300 400
Weekend
Weekend
10.3200 10.3350 10.3200 10.3350 600
10.3200 10.3200 10.3200 10.3200 800
10.3200 10.3200 10.3200 10.3200 400
10.3200 10.3200 10.3200 10.3200 500
10.3000 10.3000 10.3000 10.3000 500
Weekend
Weekend
10.3100 10.3100 10.3100 10.3100 1,000
10.3100 10.3100 10.3100 10.3100 600
10.2900 10.3300 10.2900 10.3300 800
10.3400 10.3400 10.2900 10.3100 19,900
10.2900 10.2900 10.2900 10.2900 300
Weekend
Weekend
10.3100 10.3100 10.3100 10.3100 100
10.3100 10.3100 10.3100 10.3100 200
10.3100 10.3100 10.3100 10.3100 200
10.2900 10.3000 10.2900 10.3000 800
No trading
Weekend
Weekend
10.2900 10.2900 10.2900 10.2900 300
10.2900 10.2900 10.2900 10.2900 100
10.2900 10.3000 10.2900 10.3000 1,500
10.2900 10.2900 10.2900 10.2900 100
10.2900 10.2900 10.2900 10.2900 300
Weekend
Weekend
10.2900 10.2900 10.2900 10.2900 200
10.2900 10.2900 10.2900 10.2900 100
10.2800 10.3090 10.2800 10.3090 300
10.2700 10.2700 10.2700 10.2700 0
10.2700 10.2700 10.2700 10.2700 0
Weekend
Weekend
10.2900 10.2900 10.2700 10.2700 300
10.2700 10.2700 10.2700 10.2700 200
10.2700 10.2700 10.2700 10.2700 300
10.2800 10.2800 10.2800 10.2800 200
10.2700 10.2700 10.2700 10.2700 200
Weekend
Weekend
10.2700 10.2700 10.2700 10.2700 300
10.2700 10.2700 10.2700 10.2700 300
10.2600 10.2600 10.2600 10.2600 300
10.3000 10.3000 10.2600 10.3000 1,900
No trading
Weekend
Weekend
10.2500 10.2500 10.2500 10.2500 300
10.2500 10.2500 10.2500 10.2500 400
10.2500 10.2500 10.2500 10.2500 400
10.2400 10.2600 10.2400 10.2600 1,400
10.2400 10.2400 10.2400 10.2400 400
Weekend
Weekend
10.2500 10.2500 10.2500 10.2500 400
10.2500 10.2500 10.2500 10.2500 500
10.2500 10.2500 10.2500 10.2500 2,400
10.2200 10.2200 10.2200 10.2200 500
10.2500 10.2500 10.2500 10.2500 500
Weekend
Weekend
10.2300 10.2300 10.2300 10.2300 1,100
No trading
10.2300 10.2300 10.2300 10.2300 600
10.2300 10.2300 10.2300 10.2300 600
10.2400 10.2400 10.2300 10.2400 2,400
Weekend
Weekend
10.2300 10.2300 10.2300 10.2300 700
No trading
10.2300 10.2300 10.2300 10.2300 700
10.2200 10.2200 10.2200 10.2200 800
10.2200 10.2200 10.2200 10.2200 900
Weekend
Weekend
10.2200 10.2200 10.2200 10.2200 900
10.2200 10.2200 10.2200 10.2200 1,200
10.2500 10.2500 10.2200 10.2200 1,300
10.2200 10.2200 10.2200 10.2200 1,700
10.2500 10.2500 10.2100 10.2200 3,400
Weekend
Weekend
10.2400 10.2400 10.2100 10.2100 23,800
10.2100 10.2100 10.2100 10.2100 800
10.2250 10.2400 10.2100 10.2400 4,700
10.2100 10.2100 10.2100 10.2100 700
10.2000 10.2000 10.2000 10.2000 700
Weekend
Weekend
10.2000 10.2000 10.2000 10.2000 800
10.2000 10.2300 10.2000 10.2150 1,900
10.2000 10.2000 10.2000 10.2000 800
10.1900 10.1900 10.1900 10.1900 900
10.2000 10.2000 10.1900 10.1900 1,600
Weekend
Weekend
10.1300 10.1400 10.1200 10.1400 1,200
No trading
10.1300 10.2000 10.1200 10.2000 1,600
10.2000 10.2190 10.2000 10.2190 2,500
10.2000 10.2000 10.2000 10.2000 1,200
Weekend
Weekend
10.2000 10.2000 10.2000 10.2000 1,300
10.1900 10.1900 10.1900 10.1900 1,400
10.1900 10.2100 10.1900 10.2100 21,300
10.1900 10.1900 10.1900 10.1900 1,100
10.1900 10.1900 10.1900 10.1900 1,200
Weekend
Weekend
10.1900 10.1900 10.1900 10.1900 1,800
10.1900 10.1900 10.1900 10.1900 3,900
10.1900 10.1900 10.1800 10.1800 1,500
10.1900 10.1960 10.1900 10.1960 11,400
10.1800 10.1900 10.1800 10.1900 6,400
Weekend
Weekend
10.1800 10.1800 10.1800 10.1800 3,700
10.1900 10.1990 10.1800 10.1990 1,400
10.1800 10.1800 10.1800 10.1800 1,400
10.1800 10.1800 10.1800 10.1800 1,500
10.1800 10.1800 10.1800 10.1800 1,900
Weekend
Weekend
10.1700 10.1800 10.1700 10.1800 2,200
10.1700 10.1700 10.1700 10.1700 1,900
10.1700 10.1800 10.1700 10.1750 10,700
10.1700 10.1700 10.1700 10.1700 2,100
10.1600 10.1700 10.1600 10.1700 2,300
Weekend
Weekend
10.1600 10.1700 10.1600 10.1700 31,500

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.

20 8-K 8-K (opens SEC filing in a new tab) After-hours · 20:50 ET Summarise
19 8-K 8-K (opens SEC filing in a new tab) After market open · 13:02 ET Summarise
18 10-Q 10-Q (opens SEC filing in a new tab) After-hours · 20:39 ET Summarise
17 DEF 14A DEF 14A (opens SEC filing in a new tab) Pre-market · 01:59 ET Summarise
16 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:30 ET Summarise
15 PRE 14A PRE 14A (opens SEC filing in a new tab) Next filing day · accepted 16 Sep, 21:28 ET Summarise
14 8-K 8-K (opens SEC filing in a new tab) After-hours · 17:30 ET Summarise
13 10-Q 10-Q (opens SEC filing in a new tab) Next filing day · accepted 13 Jul, 18:11 ET Summarise
12 8-K 8-K (opens SEC filing in a new tab) Next filing day · accepted 23 Jun, 19:52 ET Summarise
11 8-K 8-K (opens SEC filing in a new tab) Next filing day · accepted 17 Jun, 17:54 ET Summarise
10 8-K/A 8-K/A (opens SEC filing in a new tab) After-hours · 17:20 ET Summarise
9 8-K 8-K (opens SEC filing in a new tab) After market open · 11:09 ET Summarise
8 DEF 14A DEF 14A (opens SEC filing in a new tab) Pre-market · 06:02 ET Summarise
7 PRE 14A PRE 14A (opens SEC filing in a new tab) After-hours · 17:08 ET Summarise
6 8-K 8-K (opens SEC filing in a new tab) Next filing day · accepted 14 May, 21:29 ET Summarise
5 10-Q 10-Q (opens SEC filing in a new tab) After market open · 13:21 ET Summarise
4 10-K/A 10-K/A (opens SEC filing in a new tab) Next filing day · accepted 08 Apr, 18:26 ET Summarise
3 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:05 ET Summarise
2 10-K 10-K (opens SEC filing in a new tab) After-hours · 17:12 ET Summarise
1 8-K 8-K (opens SEC filing in a new tab) After market open · 13:55 ET Summarise