Atossa Therapeutics, Inc ATOS

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Atossa Therapeutics, Inc. - Common Stock · Company · Nasdaq · Healthcare / Biotechnology

Paper trade (simulated — no real money)

Fill: USD 2.6000 · FX 1 USD = 1.277900 SGD · about SGD 3.3225 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 13.95 → 2.60 · -81.4%
14.1007.9251.750 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 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
2.7400 2.8500 2.6000 2.6000 76,996
2.4900 2.7700 2.4600 2.7200 90,600
2.5300 2.5900 2.3800 2.5300 189,600
2.5400 2.6700 2.5100 2.5400 36,800
2.6600 2.7600 2.5100 2.5600 80,100
Weekend
Weekend
2.5900 2.9500 2.5100 2.9100 104,200
2.7800 3.1200 2.5300 2.6500 226,200
2.5200 2.8100 2.4500 2.7800 236,100
2.3500 2.6000 2.3000 2.5600 70,700
2.4400 2.5300 2.3400 2.3900 81,400
Weekend
Weekend
28 · 8-K After market open · 12:15 ET 8-K ↗
2.4500 2.7400 2.1200 2.4400 265,600
2.4600 2.4800 2.3900 2.4200 100,800
2.4100 2.4900 2.4100 2.4600 19,100
2.4600 2.5400 2.4300 2.4500 54,600
2.3800 2.5000 2.3400 2.4500 53,300
Weekend
Weekend
2.2300 2.3800 2.1700 2.3400 74,300
1.9600 2.3000 1.9600 2.2700 113,000
1.9900 2.1500 1.9500 1.9500 67,800
27 · 8-K After market open · 12:00 ET 8-K ↗
2.0600 2.1600 1.9600 1.9900 83,300
1.9100 2.0400 1.8200 1.9600 152,900
Weekend
Weekend
2.0600 2.0700 1.8900 1.9000 77,600
2.1500 2.2200 2.0500 2.0500 37,200
2.2500 2.2600 2.1500 2.1800 37,200
2.2500 2.4300 2.2500 2.2600 129,500
2.2500 2.3900 2.2500 2.2500 67,100
Weekend
Weekend
26 · 8-K After-hours · 17:00 ET 8-K ↗
2.3700 2.3800 2.2200 2.2200 39,600
2.4200 2.4300 2.3700 2.4000 33,300
2.3900 2.4800 2.3900 2.4200 45,800
2.4800 2.4900 2.3700 2.3700 43,800
2.5300 2.5600 2.4500 2.4800 35,000
Weekend
Weekend
2.3600 2.5400 2.3600 2.5100 58,600
2.3600 2.6100 2.3300 2.3400 47,200
2.5400 2.5400 2.4000 2.4000 24,800
2.4900 2.5900 2.4400 2.5200 41,300
No trading
Weekend
Weekend
2.5100 2.6000 2.5000 2.5200 28,000
2.5000 2.6000 2.4600 2.5300 56,700
2.4000 2.5100 2.3900 2.4600 44,800
2.4800 2.5000 2.3200 2.4200 91,800
2.5700 2.5900 2.5000 2.5000 53,200
Weekend
Weekend
2.6200 2.6200 2.5000 2.5800 48,200
2.6400 2.6900 2.5800 2.6400 23,100
2.6600 2.7000 2.6100 2.6500 26,300
2.6200 2.6900 2.5800 2.6800 49,700
2.5600 2.6500 2.4500 2.6400 57,000
Weekend
Weekend
2.5900 2.6200 2.5100 2.5400 25,600
2.6200 2.6200 2.4400 2.5900 71,000
2.5700 2.7600 2.5500 2.6400 62,200
2.7700 2.7800 2.5700 2.5900 58,300
2.6200 2.9700 2.5500 2.7900 192,400
Weekend
Weekend
2.5400 2.6900 2.4300 2.6000 95,900
2.3600 2.5600 2.3600 2.5600 83,100
2.3200 2.3700 2.2700 2.3500 31,300
2.3900 2.4500 2.2700 2.3600 56,700
2.2600 2.4500 2.2600 2.3700 68,900
Weekend
Weekend
2.3700 2.4500 2.2400 2.3600 78,000
25 · 8-K Pre-market · 08:45 ET 8-K ↗ 24 · 10-Q Pre-market · 08:30 ET 10-Q ↗
2.3900 2.4400 2.2600 2.4200 30,700
2.3700 2.3900 2.2700 2.3900 36,800
2.1800 2.3400 2.1800 2.3100 55,000
2.1000 2.1900 2.0700 2.1700 24,300
Weekend
Weekend
2.1900 2.1900 2.0500 2.0700 79,000
2.2900 2.3000 2.1800 2.1900 32,000
2.3700 2.3900 2.2800 2.3100 40,600
2.3600 2.4900 2.3300 2.4200 45,900
2.3000 2.4500 2.3000 2.3600 36,700
Weekend
Weekend
2.4100 2.4600 2.2500 2.3000 40,600
2.4400 2.5500 2.4100 2.4100 37,200
2.4300 2.4900 2.3700 2.4300 26,300
2.4600 2.6000 2.3900 2.4000 106,000
2.4800 2.5800 2.4000 2.4900 117,300
Weekend
Weekend
2.3900 2.5000 2.2700 2.4900 47,800
2.4200 2.4600 2.3400 2.3900 68,900
2.2900 2.4400 2.2300 2.4400 97,200
2.3500 2.3600 2.2300 2.2600 157,700
2.3700 2.4200 2.2100 2.4000 177,600
Weekend
Weekend
2.3700 2.3900 2.2200 2.3700 65,700
2.4200 2.4200 2.2700 2.3600 144,100
2.5100 2.5400 2.3800 2.4500 128,000
2.3700 2.6000 2.1900 2.4900 426,400
2.1400 2.4100 2.1400 2.2800 228,500
Weekend
Weekend
No trading
2.0300 2.1900 2.0300 2.1200 116,500
1.9500 2.0600 1.9200 2.0400 144,200
1.9800 2.0100 1.9300 1.9300 73,900
1.9000 2.0400 1.8900 1.9800 181,700
Weekend
Weekend
1.7600 1.9100 1.7300 1.8800 377,700
1.7700 1.7800 1.7000 1.7700 143,500
1.8900 1.8900 1.7500 1.7500 304,000
1.8200 1.9600 1.7800 1.9000 534,900
2.0300 2.0300 1.8100 1.8300 469,900
Weekend
Weekend
No trading
2.0100 2.0300 1.9500 2.0100 193,500
2.2100 2.2100 1.9500 1.9900 696,600
2.3600 2.3800 2.1600 2.2200 310,100
2.5100 2.5100 2.3100 2.3500 477,300
Weekend
Weekend
2.5700 2.7000 2.4500 2.4600 644,400
23 · 424B5 Pre-market · 05:16 ET 424B5 ↗
2.8100 2.8100 2.5200 2.5900 1,419,900
22 · 8-K Pre-market · 04:00 ET 8-K ↗
4.3900 4.5900 4.3600 4.4000 29,900
4.5500 4.5900 4.3600 4.4100 53,900
4.5600 4.5600 4.3500 4.5500 36,000
Weekend
Weekend
4.7800 4.8000 4.4000 4.4700 80,900
4.6700 4.8700 4.6500 4.8500 46,800
4.8000 4.8000 4.6800 4.7000 45,100
5.0600 5.1500 4.8000 4.8500 77,700
5.1400 5.2000 4.9300 5.1100 58,500
Weekend
Weekend
5.2100 5.3000 5.0000 5.2300 42,900
5.1900 5.2500 4.9800 5.1900 51,700
4.9500 5.1800 4.8600 5.1200 39,800
4.9500 5.0600 4.8600 4.9500 30,300
No trading
Weekend
Weekend
4.9300 5.1000 4.8400 4.9600 28,200
4.7900 5.0600 4.6600 4.9700 55,000
4.7100 4.9600 4.6600 4.8400 38,800
4.8000 4.9200 4.6600 4.7500 50,600
4.8500 4.9500 4.7000 4.7800 42,700
Weekend
Weekend
5.1100 5.1100 4.8500 4.8500 46,200
5.1600 5.1600 4.9500 5.1500 29,900
5.2300 5.3100 5.1500 5.1600 32,000
5.4300 5.4300 5.0800 5.1600 60,000
5.5800 5.7100 5.4500 5.5000 37,700
Weekend
Weekend
5.4200 5.6500 5.4200 5.6000 31,400
21 · 8-K Pre-market · 04:45 ET 8-K ↗ 20 · 10-Q Pre-market · 04:30 ET 10-Q ↗ 19 · 8-K Pre-market · 04:00 ET 8-K ↗
5.8100 5.8300 5.6100 5.6700 47,800
5.5300 5.8900 5.4900 5.8000 60,200
5.8600 6.1800 5.2400 5.5800 199,100
5.3300 5.9700 5.3300 5.8600 98,400
Weekend
Weekend
5.4300 5.4300 5.1600 5.3300 35,700
5.2800 5.4600 5.1900 5.3700 24,700
5.4700 5.5100 5.2100 5.2800 28,900
5.4900 5.7400 5.3200 5.4900 29,600
5.6800 5.7800 5.3200 5.4500 36,800
Weekend
Weekend
5.7300 5.8000 5.5400 5.7000 42,700
5.9300 5.9300 5.6100 5.7300 39,400
5.8700 6.0200 5.7500 5.9500 40,200
6.2000 6.2000 5.7600 5.7700 91,400
5.8300 6.2800 5.8000 6.1700 127,700
Weekend
Weekend
5.8100 5.9400 5.6700 5.8300 54,700
5.6400 5.7800 5.5200 5.7700 33,900
18 · 8-K Pre-market · 04:30 ET 8-K ↗
5.3700 5.7600 5.3500 5.7400 100,100
5.3000 5.4400 5.2300 5.3500 35,500
4.9200 5.3600 4.9200 5.3100 71,400
Weekend
Weekend
4.9900 4.9900 4.8100 4.9400 30,100
4.8400 5.0500 4.7300 4.9800 42,900
5.0800 5.1400 4.7300 4.8200 77,000
5.1500 5.1500 4.7000 4.8800 81,500
5.4100 5.4100 5.1000 5.1500 54,700
Weekend
Weekend
No trading
5.0100 5.5600 5.0000 5.3700 71,500
5.2700 5.3600 5.0300 5.1100 63,300
4.7700 5.2600 4.7700 5.2600 42,700
17 · DEF 14A After market open · 13:30 ET DEF 14A ↗
4.7900 4.8700 4.5900 4.7100 39,200
Weekend
Weekend
4.6000 4.9300 4.6000 4.7200 64,900
5.1900 5.4700 4.6400 4.7100 124,100
16 · 10-K After market open · 13:21 ET 10-K ↗ 15 · 8-K After market open · 13:20 ET 8-K ↗
5.5700 6.0900 5.4000 5.4200 130,300
5.6100 5.6900 5.3900 5.5100 41,200
5.3700 5.7100 5.3500 5.6100 65,600
Weekend
Weekend
14 · PRE 14A After market open · 12:52 ET PRE 14A ↗
5.1700 5.9800 5.1200 5.3300 159,500
5.1100 5.3500 4.9700 5.1300 66,000
5.5000 5.5300 5.1000 5.1100 47,200
4.9800 5.5700 4.9800 5.4900 64,500
5.0600 5.1800 4.9000 4.9700 39,000
Weekend
Weekend
5.0800 5.2300 4.9500 5.0100 105,700
4.7300 5.3800 4.7100 5.0500 146,900
4.7300 4.8500 4.6100 4.7800 42,700
4.5800 4.8700 4.5600 4.7800 125,400
4.5300 4.6000 4.3600 4.5700 130,000
Weekend
Weekend
4.5600 4.6700 4.4400 4.5300 46,200
4.9200 5.0100 4.5200 4.6800 70,700
4.7900 5.1200 4.7100 4.9200 136,400
4.5400 4.9100 4.3100 4.7200 104,100
4.3500 4.5500 4.2300 4.5000 88,100
Weekend
Weekend
4.4300 4.5900 4.3500 4.4300 69,300
4.3600 4.6000 4.3000 4.4700 90,800
4.2300 4.4400 4.1500 4.2700 78,600
4.0100 4.2700 4.0000 4.2100 96,300
4.1100 4.1500 3.8400 3.9600 105,400
Weekend
Weekend
13 · 8-K After market open · 11:22 ET 8-K ↗ 12 · 424B5 After market open · 11:16 ET 424B5 ↗ 11 · 424B3 After market open · 11:07 ET 424B3 ↗
4.3800 4.4800 4.1500 4.2100 43,900
4.3500 4.5500 4.2000 4.4200 78,800
4.0600 4.5900 4.0600 4.3400 85,600
10 · 8-K After market open · 11:30 ET 8-K ↗
4.1400 4.2000 3.9700 4.1500 92,700
No trading
Weekend
Weekend
3.9200 4.4400 3.9100 4.2000 94,400
4.0500 4.1500 3.7600 3.9400 247,200
4.7600 4.7700 4.0300 4.0500 348,100
9 · 8-K Pre-market · 03:45 ET 8-K ↗
4.9100 5.0500 4.8000 4.8200 190,400
5.3200 5.3300 4.7800 4.9900 325,200
Weekend
Weekend
5.3300 5.5400 5.2100 5.3400 156,100
5.0300 5.4700 5.0100 5.3300 186,700
5.4100 5.5100 4.9200 5.2900 282,900
5.6000 5.8500 4.9100 5.5300 639,800
7.2300 7.5600 5.4000 5.5900 678,200
Weekend
Weekend
9.0000 9.0000 7.9500 8.5500 189,393
9.3000 9.3000 8.5500 9.0000 118,360
10.0500 10.3500 9.1500 9.3000 141,433
10.5000 10.9500 9.9000 10.2000 124,893
9.4500 10.6500 9.0000 10.3500 211,373
8 · 8-K Pre-market · 03:00 ET 8-K ↗
Weekend
Weekend
9.9000 9.9000 9.4500 9.6000 50,140
9.3000 9.9000 8.8500 9.7500 77,700
9.0000 9.3000 8.8500 9.0000 60,967
9.9000 9.9000 8.7000 9.0000 262,987
No trading
Weekend
Weekend
9.1500 9.6000 8.8500 9.3000 776,060
9.1500 9.1500 8.5500 8.7000 107,020
9.4500 9.4500 9.0000 9.0000 109,600
9.9000 10.0500 9.4500 9.6000 35,907
9.6000 9.9000 9.3000 9.7500 48,440
Weekend
Weekend
9.9000 10.0500 9.4500 9.7500 59,553
7 · 8-K Pre-market · 03:15 ET 8-K ↗
10.0500 10.2000 9.6000 9.7500 60,260
10.0500 10.5000 9.9000 10.0500 44,540
9.1500 10.2000 9.1500 9.9000 157,127
6 · 8-K Pre-market · 03:30 ET 8-K ↗
9.7500 9.7500 9.0000 9.3000 78,020
Weekend
Weekend
8.8500 9.4500 8.8500 9.4500 103,153
No trading
9.0000 9.1500 8.2500 8.8500 247,867
9.7500 9.7500 9.3000 9.3000 110,973
9.6000 10.3500 9.6000 9.9000 70,720
Weekend
Weekend
10.2000 10.3500 9.7500 9.9000 65,167
No trading
10.2000 10.5000 10.0500 10.3500 45,707
10.5000 10.6500 10.0500 10.2000 152,540
10.9500 11.2500 10.6500 10.8000 42,893
5 · DEF 14A Pre-market · 03:30 ET DEF 14A ↗
Weekend
Weekend
10.6500 11.1000 10.5000 10.9500 63,053
10.6500 11.1000 10.5000 10.5000 41,907
11.1000 11.2500 10.6500 10.6500 32,133
10.5000 11.1000 10.5000 10.8000 39,640
11.1000 11.5500 10.5000 10.6500 193,387
Weekend
Weekend
4 · PRE 14A After market open · 12:00 ET PRE 14A ↗
13.2000 13.6500 12.3000 12.4500 97,133
14.4000 14.8500 13.3500 13.5000 388,287
12.3000 13.0500 12.0000 12.7500 68,380
11.7000 12.3000 11.7000 12.1500 38,707
12.3000 12.3000 11.5500 11.7000 30,700
Weekend
Weekend
11.7000 12.1500 11.5500 12.0000 56,260
11.1000 11.5500 10.9500 11.4000 47,213
3 · 8-K Pre-market · 03:15 ET 8-K ↗
10.6500 11.1000 10.5000 11.1000 41,473
10.9500 11.2500 10.2000 10.5000 80,973
11.8500 12.0000 11.1000 11.1000 49,787
Weekend
Weekend
11.8500 11.8500 11.5500 11.7000 15,893
No trading
11.7000 12.1500 11.5500 11.7000 41,907
11.4000 11.7000 11.2500 11.5500 15,800
12.0000 12.3000 11.2500 11.2500 52,853
Weekend
Weekend
11.2500 11.7000 11.1000 11.7000 39,687
11.4000 12.0000 11.2500 11.2500 33,133
11.8500 12.0000 11.4000 11.4000 30,227
11.5500 12.3000 11.5500 11.8500 28,520
12.1500 12.7500 11.5500 11.8500 50,780
Weekend
Weekend
11.8500 12.3000 11.7000 12.0000 32,200
12.0000 12.4500 11.5500 12.0000 52,127
12.4500 12.7500 11.8500 12.1500 41,540
2 · 10-Q Pre-market · 03:45 ET 10-Q ↗ 1 · 8-K Pre-market · 03:40 ET 8-K ↗
12.6000 12.7500 12.1500 12.4500 15,727
12.4500 13.2000 12.4500 12.6000 31,880
Weekend
Weekend
12.0000 12.4500 11.7000 12.3000 58,760
12.4500 12.6000 12.1500 12.1500 21,800
12.6000 12.7500 12.4500 12.4500 24,340
12.9000 13.3500 12.6000 12.7500 40,360
13.5000 13.6500 12.7500 12.9000 35,573
Weekend
Weekend
13.0500 13.6500 13.0500 13.3500 29,633
13.0500 13.5000 12.9000 13.2000 37,100
13.9500 14.1000 12.9000 13.2000 55,833
14.1000 14.4000 13.9500 14.1000 23,527
13.9500 14.4000 13.8000 14.1000 37,273
Weekend
Weekend
13.8000 14.1000 13.6500 13.9500 42,467

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.

28 8-K 8-K (opens SEC filing in a new tab) After market open · 12:15 ET Summarise
27 8-K 8-K (opens SEC filing in a new tab) After market open · 12:00 ET Summarise
26 8-K 8-K (opens SEC filing in a new tab) After-hours · 17:00 ET Summarise
25 8-K 8-K (opens SEC filing in a new tab) Pre-market · 08:45 ET Summarise
24 10-Q 10-Q (opens SEC filing in a new tab) Pre-market · 08:30 ET Summarise
23 424B5 424B5 (opens SEC filing in a new tab) Pre-market · 05:16 ET Summarise
22 8-K 8-K (opens SEC filing in a new tab) Pre-market · 04:00 ET Summarise
21 8-K 8-K (opens SEC filing in a new tab) Pre-market · 04:45 ET Summarise
20 10-Q 10-Q (opens SEC filing in a new tab) Pre-market · 04:30 ET Summarise
19 8-K 8-K (opens SEC filing in a new tab) Pre-market · 04:00 ET Summarise
18 8-K 8-K (opens SEC filing in a new tab) Pre-market · 04:30 ET Summarise
17 DEF 14A DEF 14A (opens SEC filing in a new tab) After market open · 13:30 ET Summarise
16 10-K 10-K (opens SEC filing in a new tab) After market open · 13:21 ET Summarise
15 8-K 8-K (opens SEC filing in a new tab) After market open · 13:20 ET Summarise
14 PRE 14A PRE 14A (opens SEC filing in a new tab) After market open · 12:52 ET Summarise
13 8-K 8-K (opens SEC filing in a new tab) After market open · 11:22 ET Summarise
12 424B5 424B5 (opens SEC filing in a new tab) After market open · 11:16 ET Summarise
11 424B3 424B3 (opens SEC filing in a new tab) After market open · 11:07 ET Summarise
10 8-K 8-K (opens SEC filing in a new tab) After market open · 11:30 ET Summarise
9 8-K 8-K (opens SEC filing in a new tab) Pre-market · 03:45 ET Summarise
8 8-K 8-K (opens SEC filing in a new tab) Pre-market · 03:00 ET Summarise
7 8-K 8-K (opens SEC filing in a new tab) Pre-market · 03:15 ET Summarise
6 8-K 8-K (opens SEC filing in a new tab) Pre-market · 03:30 ET Summarise
5 DEF 14A DEF 14A (opens SEC filing in a new tab) Pre-market · 03:30 ET Summarise
4 PRE 14A PRE 14A (opens SEC filing in a new tab) After market open · 12:00 ET Summarise
3 8-K 8-K (opens SEC filing in a new tab) Pre-market · 03:15 ET Summarise
2 10-Q 10-Q (opens SEC filing in a new tab) Pre-market · 03:45 ET Summarise
1 8-K 8-K (opens SEC filing in a new tab) Pre-market · 03:40 ET Summarise