ClearSign Technologies Corporation CLIR

Open calendar →

ClearSign Technologies Corporation - Common Stock · Company · Nasdaq · Industrials / Pollution & Treatment Controls

Paper trade (simulated — no real money)

Fill: USD 2.3100 · FX 1 USD = 1.277900 SGD · about SGD 2.9519 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 8.90 → 2.31 · -74.0%
9.3005.8052.310 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 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
2.4000 2.4800 2.1700 2.3100 16,259
2.5100 2.5100 2.2200 2.4500 3,100
2.5000 2.5400 2.3200 2.4400 9,500
2.4300 2.5200 2.4300 2.4900 11,800
2.5000 2.5600 2.1200 2.3400 47,700
Weekend
Weekend
2.5400 2.6900 2.3600 2.4000 28,000
2.7700 2.7800 2.3500 2.4500 24,800
2.8300 2.8500 2.6200 2.6400 19,000
3.0100 3.1300 2.8600 2.8800 33,300
3.2000 3.2300 2.9200 2.9600 22,900
Weekend
Weekend
3.1200 3.3200 3.1200 3.2100 25,600
3.2700 3.4300 3.1100 3.1100 13,800
3.2400 3.3900 3.2400 3.3000 9,700
3.3000 3.7700 3.2900 3.3000 9,100
3.5300 3.7400 3.3000 3.3000 41,700
Weekend
Weekend
3.5700 3.6400 3.4100 3.5100 28,400
3.3300 3.7600 3.2600 3.5500 14,000
3.7600 3.8600 3.5500 3.5500 7,800
3.6500 3.9000 3.6500 3.7300 6,800
3.5000 3.7100 3.2900 3.6500 31,800
Weekend
Weekend
3.5900 3.6000 3.3800 3.4500 11,700
3.5200 3.7300 3.4100 3.4600 17,400
3.7600 4.0100 3.4700 3.5400 36,900
3.7700 3.9600 3.7500 3.7500 6,100
3.8500 4.0500 3.7900 3.7900 10,800
Weekend
Weekend
3.7100 3.9000 3.7100 3.8500 19,200
3.6000 3.7500 3.6000 3.6100 8,700
3.8800 3.9800 3.5000 3.5200 72,000
3.8000 4.1800 3.7900 4.0400 5,900
3.9700 4.2700 3.8000 3.8500 23,800
30 · 8-K Pre-market · 08:45 ET FORM 8-K ↗
Weekend
Weekend
4.0900 4.1800 3.7400 4.0300 68,700
4.1500 4.2800 3.9000 4.0400 49,900
4.4100 4.4100 4.2200 4.2200 3,300
4.0000 4.7200 4.0000 4.3100 19,500
No trading
Weekend
Weekend
3.9800 4.1500 3.9000 3.9100 9,200
4.2700 4.3200 3.9500 4.1000 42,200
4.2200 4.4500 4.1000 4.2500 10,700
4.2000 4.2000 4.1500 4.1500 1,600
4.3500 4.3600 4.2200 4.2600 5,000
Weekend
Weekend
4.5800 4.7500 4.4700 4.4700 4,900
4.7000 4.8100 4.5000 4.5300 7,100
4.6700 4.8000 4.5700 4.6600 8,600
4.8800 4.9400 4.6100 4.7000 29,300
4.4300 4.8900 4.3500 4.8400 30,200
Weekend
Weekend
4.2000 4.5600 4.0900 4.4800 23,100
29 · 8-K After-hours · 16:15 ET FORM 8-K ↗
4.5300 4.9600 3.8600 4.6900 31,800
4.7100 4.7700 4.2900 4.4000 22,600
4.6900 4.8500 4.4000 4.6700 13,800
4.6700 5.0000 4.3100 4.5600 20,900
Weekend
Weekend
4.1000 4.7000 4.1000 4.6500 27,200
28 · 10-Q Pre-market · 09:00 ET 10-Q ↗
4.1100 4.2500 4.1100 4.2500 3,500
4.0600 4.2000 4.0600 4.1300 2,700
3.9500 4.1700 3.8600 4.1700 25,800
27 · 8-K Pre-market · 07:45 ET FORM 8-K ↗
3.8100 3.9500 3.6600 3.9100 15,500
Weekend
Weekend
3.7900 3.7900 3.7500 3.7500 3,500
3.8800 3.9100 3.7300 3.8400 10,000
3.9800 4.1100 3.8300 3.8900 4,500
3.9600 4.0300 3.9600 4.0000 3,000
3.8700 4.3300 3.8600 3.9600 18,300
Weekend
Weekend
3.8800 3.9600 3.8500 3.8600 1,200
3.8000 3.9700 3.8000 3.9000 2,700
3.9100 4.0400 3.8500 4.0200 2,800
3.8900 4.0400 3.8000 4.0400 7,600
3.7400 4.0000 3.7400 3.9800 18,400
Weekend
Weekend
3.3400 3.4900 3.3400 3.4900 32,500
3.2000 3.7200 3.2000 3.3500 62,300
26 · 8-K Pre-market · 08:45 ET FORM 8-K ↗
3.3500 3.4000 3.1600 3.2500 7,400
3.4000 3.4300 3.3500 3.3500 3,400
3.5500 3.5500 3.3200 3.3700 13,600
Weekend
Weekend
3.6500 3.6600 3.5200 3.6200 3,800
3.6400 3.6900 3.6400 3.6400 2,800
3.6000 3.7200 3.6000 3.7200 3,600
3.6800 3.8700 3.6800 3.7100 10,600
3.7100 3.7900 3.6100 3.6200 16,700
Weekend
Weekend
3.7500 3.7500 3.6600 3.7200 6,200
3.7200 3.8000 3.7000 3.7500 6,000
3.9100 3.9100 3.6100 3.7000 6,000
4.0800 4.1400 3.8200 3.8400 13,000
25 · 8-K After-hours · 16:06 ET FORM 8-K ↗ 24 · 424B5 After-hours · 16:05 ET 424B5 ↗
4.0300 4.1000 3.9500 4.1000 10,100
Weekend
Weekend
No trading
4.0800 4.2400 4.0600 4.0600 9,500
3.7900 4.2700 3.7600 4.1200 34,100
3.6100 3.8800 3.5800 3.6700 17,500
3.5500 3.6900 3.5000 3.6400 6,300
Weekend
Weekend
3.4000 3.7000 3.3900 3.6200 14,700
3.5400 3.6300 3.3900 3.3900 14,400
3.6900 3.8600 3.5200 3.5200 5,200
3.6700 3.7700 3.5900 3.7100 4,900
3.8900 3.9400 3.6200 3.7200 19,000
Weekend
Weekend
No trading
23 · 8-K After-hours · 16:15 ET FORM 8-K ↗
4.1000 4.1000 3.7100 3.7900 34,000
4.1400 4.1400 4.0200 4.0500 14,000
4.3300 4.3300 4.0700 4.1200 25,800
4.2800 4.2800 4.0800 4.1400 12,500
Weekend
Weekend
4.1800 4.2900 4.0800 4.0800 11,000
4.3200 4.3200 4.0700 4.1700 16,100
4.2800 4.3400 4.0700 4.1900 18,200
22 · 8-K After-hours · 16:30 ET FORM 8-K ↗
4.2500 4.4300 4.0700 4.1600 22,800
3.9300 4.2500 3.9300 4.1500 19,700
Weekend
Weekend
4.3100 4.4000 3.9400 3.9400 9,500
4.3500 4.4800 4.2800 4.2800 17,500
4.4000 4.4700 4.3800 4.3800 11,000
4.4500 4.5500 4.3600 4.4600 9,700
4.5500 4.6600 3.7300 4.4700 7,900
21 · 8-K Pre-market · 08:30 ET FORM 8-K ↗ 20 · 424B5 Pre-market · 08:25 ET 424B5 ↗
Weekend
Weekend
4.3900 4.6900 4.2700 4.6300 58,000
19 · 424B5 After-hours · 16:31 ET 424B5 ↗ 18 · 8-K After-hours · 16:19 ET FORM 8-K ↗
4.4500 4.7500 4.4100 4.5600 43,400
4.4000 4.6500 4.4000 4.4500 14,500
4.6100 4.8800 4.6000 4.6300 51,500
No trading
Weekend
Weekend
4.7400 4.8900 4.6100 4.8500 17,900
17 · 8-K After-hours · 16:30 ET FORM 8-K ↗
4.7300 5.0100 4.5900 5.0100 8,100
4.6100 5.0900 4.5100 4.9000 16,900
4.4700 4.6500 4.4600 4.6000 6,200
4.7100 4.8200 4.4100 4.4100 25,400
Weekend
Weekend
4.8600 5.0700 4.6200 4.7100 21,700
16 · 10-Q Pre-market · 09:20 ET 10-Q ↗
4.6100 5.5600 4.5700 5.2100 29,300
4.4900 4.7400 4.3500 4.4500 16,100
4.3800 4.7500 4.3700 4.5500 17,300
4.6100 4.6100 4.1800 4.3600 22,500
Weekend
Weekend
4.8000 4.8000 4.2100 4.5400 26,200
4.9700 4.9800 4.6200 4.8300 16,300
4.9100 5.0100 4.8000 4.9100 15,700
4.9400 4.9900 4.8800 4.9100 5,000
5.0300 5.1000 4.5700 5.0600 16,100
Weekend
Weekend
5.0500 5.2200 5.0100 5.1200 14,600
5.3300 5.3300 5.0000 5.0000 9,100
5.3300 5.5600 5.3300 5.3700 2,900
15 · DEFA14A After-hours · 16:05 ET DEFA14A ↗ 14 · DEF 14A After market open · 11:09 ET DEF 14A ↗
5.3200 5.5100 5.3200 5.3300 9,400
4.8800 5.3300 4.7300 5.2300 14,700
Weekend
Weekend
5.0800 5.2600 5.0000 5.0000 5,700
5.4800 5.5000 5.0600 5.1600 15,200
5.4800 5.8000 5.4800 5.5900 13,000
5.4400 5.5300 5.2100 5.4000 11,900
5.5600 5.6600 5.1900 5.4100 56,000
Weekend
Weekend
5.3300 5.6800 5.3300 5.4500 21,200
5.9000 6.1400 5.2200 5.3300 17,500
5.6000 5.9600 5.6000 5.8400 17,700
5.4700 5.6000 5.2600 5.3800 18,700
5.2900 5.3900 4.9300 5.3900 47,800
Weekend
Weekend
13 · 8-K After-hours · 16:15 ET FORM 8-K ↗
6.2800 6.5900 4.7300 5.2900 133,100
6.3000 6.8700 5.9900 6.1800 58,100
6.5800 6.5900 5.9900 6.4700 40,200
6.4500 6.9800 5.5500 6.1500 76,900
4.8500 7.5600 4.8000 6.9400 691,000
Weekend
Weekend
No trading
4.7200 4.9400 4.3100 4.8300 8,400
4.3900 4.7100 4.3500 4.7100 13,600
12 · 10-K After-hours · 16:05 ET 10-K ↗
3.6900 4.4600 3.6900 4.3600 10,700
11 · 8-K After-hours · 17:29 ET FORM 8-K ↗
3.7800 4.0400 3.6000 3.8500 43,900
Weekend
Weekend
3.7100 3.7600 3.2400 3.7400 9,800
3.5000 4.0600 3.5000 3.7200 19,400
3.6500 3.7300 3.5700 3.5700 7,100
3.5300 3.7100 3.5300 3.5300 8,000
3.7800 3.8400 3.5200 3.6000 14,700
Weekend
Weekend
3.6300 3.9600 3.3700 3.4600 33,100
3.6600 3.8300 3.5600 3.6100 16,500
4.0000 4.0300 3.6700 3.7300 28,700
4.2600 4.3400 4.0100 4.0400 25,800
4.6200 4.7500 4.2600 4.3600 24,900
Weekend
Weekend
4.2000 4.4000 3.9000 4.3000 32,170
4.8000 5.0000 4.4000 4.4000 32,570
5.1000 5.1000 4.4000 4.5000 61,920
10 · 8-K After-hours · 16:20 ET FORM 8-K ↗
5.4000 6.4000 5.4000 5.7000 63,670
5.6000 5.6000 5.2000 5.4000 6,300
Weekend
Weekend
5.2000 5.8000 5.2000 5.4000 19,330
5.2000 5.4000 5.2000 5.2000 9,280
9 · 8-K After-hours · 17:00 ET FORM 8-K ↗
5.5000 5.5000 5.1000 5.4000 18,930
5.4000 5.6000 5.4000 5.5000 2,530
5.7000 5.8000 5.6000 5.6000 5,860
Weekend
Weekend
5.4000 5.7000 5.4000 5.6000 4,400
5.5000 5.8000 5.5000 5.6000 6,700
8 · 8-K After-hours · 17:15 ET FORM 8-K ↗
5.7000 5.9000 5.6000 5.8000 6,790
6.0000 6.1000 5.5000 5.9000 7,690
5.9000 6.0000 5.8000 5.9000 4,690
Weekend
Weekend
6.2000 6.4000 5.9000 5.9000 3,720
6.2000 6.4000 6.1000 6.2000 7,340
6.2000 6.5000 6.0000 6.1000 4,250
6.1000 6.3000 5.9000 6.3000 2,220
No trading
Weekend
Weekend
6.0000 6.3000 5.9000 6.1000 12,360
5.9000 6.1000 5.6000 6.1000 8,170
6.1000 6.3000 5.8000 5.8000 8,440
6.5000 6.5000 6.1000 6.1000 6,610
6.2000 7.0000 5.9000 6.6000 24,760
Weekend
Weekend
5.8000 5.9000 5.5000 5.8000 5,430
5.7000 5.9000 5.6000 5.7000 8,670
6.0000 6.1000 5.7000 5.9000 8,270
5.7000 6.2000 5.6000 6.1000 6,860
7 · DEF 14A After-hours · 16:05 ET DEF 14A ↗
5.9000 6.5000 5.4000 6.0000 16,100
Weekend
Weekend
6.1000 6.5000 6.0000 6.0000 130,620
6.4000 6.5000 5.8000 6.0000 11,850
6.5000 6.9000 6.1000 6.2000 13,560
6.9000 7.2000 6.7000 6.7000 14,630
7.2000 7.2000 7.0000 7.0000 5,390
Weekend
Weekend
6 · PRE 14A After-hours · 17:11 ET PRE 14A ↗
7.2000 7.5000 7.0000 7.0000 3,180
6.8000 7.5000 6.7000 7.2000 23,790
7.5000 7.7000 6.3000 6.8000 22,650
7.8000 7.9000 7.5000 7.5000 7,360
No trading
Weekend
Weekend
7.9000 8.1000 7.6000 7.6000 9,370
7.5000 8.1000 7.5000 7.9000 24,910
7.7000 7.8000 7.5000 7.5000 3,520
7.3000 7.7000 7.0000 7.7000 10,720
7.8000 7.8000 7.0000 7.4000 22,540
Weekend
Weekend
7.7000 8.1000 7.4000 7.8000 26,430
7.7000 7.9000 6.9000 7.3000 12,510
5 · 8-K After-hours · 16:05 ET FORM 8-K ↗
6.5000 7.9000 6.0000 7.7000 43,760
6.9000 6.9000 5.8000 6.0000 25,850
6.0000 6.9000 5.8000 6.4000 18,140
Weekend
Weekend
5.6000 5.9000 5.5000 5.7000 11,170
No trading
5.6000 5.7000 5.5000 5.6000 13,410
5.5000 5.8000 5.5000 5.6000 8,160
5.9000 6.0000 5.6000 5.8000 15,810
Weekend
Weekend
6.1000 6.5000 6.0000 6.1000 7,030
No trading
6.0000 6.3000 5.9000 6.3000 2,140
5.6000 6.0000 5.6000 6.0000 3,320
5.7000 6.0000 5.7000 5.8000 6,190
Weekend
Weekend
6.1000 6.3000 5.5000 5.7000 17,640
6.4000 6.7000 5.8000 5.9000 10,950
5.8000 5.9000 5.5000 5.5000 21,670
5.8000 6.3000 5.8000 5.9000 5,920
6.4000 6.6000 5.8000 5.8000 32,240
Weekend
Weekend
7.0000 7.4000 6.5000 6.6000 31,410
6.8000 6.8000 5.8000 6.1000 30,290
7.5000 7.8000 6.8000 6.8000 18,130
7.7000 7.8000 7.5000 7.5000 3,040
4 · 8-K After-hours · 16:30 ET FORM 8-K ↗
7.5000 7.8000 7.4000 7.5000 3,250
Weekend
Weekend
7.7000 7.7000 7.5000 7.7000 2,570
7.7000 7.8000 7.5000 7.6000 1,980
7.2000 8.0000 7.2000 7.7000 8,730
7.0000 7.2000 7.0000 7.2000 3,370
7.3000 7.4000 6.7000 7.2000 8,160
Weekend
Weekend
7.4000 7.5000 7.4000 7.4000 4,490
No trading
7.5000 7.5000 7.3000 7.4000 6,120
7.7000 7.8000 6.8000 7.5000 20,020
8.2000 8.2000 7.5000 7.8000 10,100
Weekend
Weekend
3 · 8-K After-hours · 16:05 ET FORM 8-K ↗
8.4000 8.5000 7.9000 8.1000 8,820
8.7000 8.7000 8.2000 8.2000 3,400
8.0000 8.7000 8.0000 8.6000 7,260
8.4000 8.4000 7.9000 8.3000 3,260
2 · 8-K After-hours · 17:05 ET FORM 8-K ↗
8.6000 8.8000 7.9000 8.3000 11,250
Weekend
Weekend
1 · 10-Q After-hours · 16:06 ET 10-Q ↗
8.6000 9.8000 7.8000 8.8000 26,570
8.3000 9.7000 7.5000 8.7000 44,610
8.5000 8.9000 8.3000 8.3000 7,540
9.5000 9.5000 8.5000 8.6000 13,590
9.5000 9.6000 9.1000 9.3000 4,310
Weekend
Weekend
9.2000 9.3000 9.0000 9.3000 11,200
9.3000 9.4000 8.8000 9.0000 3,580
8.5000 9.6000 8.4000 9.2000 16,460
8.8000 9.1000 8.4000 8.6000 14,230
8.9000 8.9000 8.3000 8.5000 3,960
Weekend
Weekend
9.0000 9.2000 8.5000 8.7000 7,000
9.0000 9.4000 8.6000 8.8000 4,710
9.1000 9.2000 9.0000 9.0000 11,080
8.7000 10.2000 8.7000 9.1000 39,930
8.8000 8.9000 8.1000 8.4000 18,440
Weekend
Weekend
9.5000 9.5000 8.6000 8.9000 21,120

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.

30 8-K FORM 8-K (opens SEC filing in a new tab) Pre-market · 08:45 ET Summarise
29 8-K FORM 8-K (opens SEC filing in a new tab) After-hours · 16:15 ET Summarise
28 10-Q 10-Q (opens SEC filing in a new tab) Pre-market · 09:00 ET Summarise
27 8-K FORM 8-K (opens SEC filing in a new tab) Pre-market · 07:45 ET Summarise
26 8-K FORM 8-K (opens SEC filing in a new tab) Pre-market · 08:45 ET Summarise
25 8-K FORM 8-K (opens SEC filing in a new tab) After-hours · 16:06 ET Summarise
24 424B5 424B5 (opens SEC filing in a new tab) After-hours · 16:05 ET Summarise
23 8-K FORM 8-K (opens SEC filing in a new tab) After-hours · 16:15 ET Summarise
22 8-K FORM 8-K (opens SEC filing in a new tab) After-hours · 16:30 ET Summarise
21 8-K FORM 8-K (opens SEC filing in a new tab) Pre-market · 08:30 ET Summarise
20 424B5 424B5 (opens SEC filing in a new tab) Pre-market · 08:25 ET Summarise
19 424B5 424B5 (opens SEC filing in a new tab) After-hours · 16:31 ET Summarise
18 8-K FORM 8-K (opens SEC filing in a new tab) After-hours · 16:19 ET Summarise
17 8-K FORM 8-K (opens SEC filing in a new tab) After-hours · 16:30 ET Summarise
16 10-Q 10-Q (opens SEC filing in a new tab) Pre-market · 09:20 ET Summarise
15 DEFA14A DEFA14A (opens SEC filing in a new tab) After-hours · 16:05 ET Summarise
14 DEF 14A DEF 14A (opens SEC filing in a new tab) After market open · 11:09 ET Summarise
13 8-K FORM 8-K (opens SEC filing in a new tab) After-hours · 16:15 ET Summarise
12 10-K 10-K (opens SEC filing in a new tab) After-hours · 16:05 ET Summarise
11 8-K FORM 8-K (opens SEC filing in a new tab) After-hours · 17:29 ET Summarise
10 8-K FORM 8-K (opens SEC filing in a new tab) After-hours · 16:20 ET Summarise
9 8-K FORM 8-K (opens SEC filing in a new tab) After-hours · 17:00 ET Summarise
8 8-K FORM 8-K (opens SEC filing in a new tab) After-hours · 17:15 ET Summarise
7 DEF 14A DEF 14A (opens SEC filing in a new tab) After-hours · 16:05 ET Summarise
6 PRE 14A PRE 14A (opens SEC filing in a new tab) After-hours · 17:11 ET Summarise
5 8-K FORM 8-K (opens SEC filing in a new tab) After-hours · 16:05 ET Summarise
4 8-K FORM 8-K (opens SEC filing in a new tab) After-hours · 16:30 ET Summarise
3 8-K FORM 8-K (opens SEC filing in a new tab) After-hours · 16:05 ET Summarise
2 8-K FORM 8-K (opens SEC filing in a new tab) After-hours · 17:05 ET Summarise
1 10-Q 10-Q (opens SEC filing in a new tab) After-hours · 16:06 ET Summarise