Atossa Therapeutics, Inc ATOS

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Atossa Therapeutics, Inc. - Common Stock · Company · Nasdaq

Paper trade (simulated — no real money)

Fill: USD 2.3000 · FX 1 USD = 1.289800 SGD · about SGD 2.9665 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 12.30 → 2.30 · -81.3%
17.7009.7251.750 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 29 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
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
29 · 424B5 Pre-market · 05:16 ET 424B5 ↗
2.8100 2.8100 2.5200 2.5900 1,419,900
28 · 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
27 · 8-K Pre-market · 04:45 ET 8-K ↗ 26 · 10-Q Pre-market · 04:30 ET 10-Q ↗ 25 · 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
24 · 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
23 · 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
22 · 10-K After market open · 13:21 ET 10-K ↗ 21 · 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
20 · 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
19 · 8-K After market open · 11:22 ET 8-K ↗ 18 · 424B5 After market open · 11:16 ET 424B5 ↗ 17 · 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
16 · 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
15 · 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
14 · 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
13 · 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
12 · 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
11 · 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
10 · 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
9 · 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
8 · 10-Q Pre-market · 03:45 ET 10-Q ↗ 7 · 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
13.9500 14.2500 13.5000 13.8000 32,093
14.5500 14.5500 13.5000 13.8000 90,440
15.0000 15.3000 14.4000 14.4000 43,267
15.0000 15.1500 14.7000 15.1500 40,260
Weekend
Weekend
15.1500 15.4500 14.2500 14.7000 80,567
15.7500 16.5000 15.0000 15.4500 70,827
15.6000 16.2000 15.4500 15.7500 54,553
15.3000 15.9000 14.4000 15.4500 102,133
6 · 8-K Pre-market · 03:50 ET 8-K ↗
16.8000 17.2500 15.6000 15.7500 103,413
Weekend
Weekend
17.5500 18.0000 15.7500 16.2000 162,287
16.9500 19.3500 16.8000 17.7000 291,527
15.1500 17.4000 15.1500 16.6500 275,467
15.0000 15.3000 14.7000 15.1500 72,160
15.1500 15.3000 14.5500 15.0000 86,433
Weekend
Weekend
13.9500 15.7500 13.8000 15.1500 201,853
13.8000 13.9500 13.3500 13.8000 54,433
12.9000 13.9500 12.9000 13.8000 77,847
13.2000 13.3500 12.9000 13.0500 24,907
13.0500 13.5000 12.9000 13.0500 61,260
Weekend
Weekend
5 · 8-K After market open · 13:12 ET 8-K ↗
12.3000 12.9000 12.3000 12.9000 31,013
12.4500 12.6000 12.3000 12.3000 22,093
12.4500 12.7500 12.3000 12.4500 26,713
12.7500 13.0500 12.3000 12.3000 63,847
12.6000 12.7500 12.3000 12.4500 31,240
Weekend
Weekend
13.2000 13.2000 12.4500 12.7500 50,033
12.6000 13.2000 12.4500 13.2000 69,533
12.1500 12.6000 12.1500 12.4500 33,007
12.1500 12.4500 12.1500 12.3000 37,120
12.4500 12.6000 12.1500 12.3000 39,500
Weekend
Weekend
12.4500 12.7500 12.4500 12.6000 32,927
12.0000 12.4500 12.0000 12.3000 44,407
12.1500 12.3000 11.8500 12.0000 28,107
11.7000 12.3000 11.7000 12.1500 35,847
12.0000 12.1500 11.7000 12.1500 50,547
4 · 8-K Pre-market · 04:36 ET 8-K ↗
Weekend
Weekend
11.7000 12.0000 11.5500 11.8500 37,247
11.7000 11.7000 11.4000 11.5500 15,240
11.4000 11.7000 11.4000 11.5500 36,980
11.2500 11.7000 11.2500 11.5500 25,180
No trading
Weekend
Weekend
11.5500 11.5500 11.2500 11.4000 20,040
11.4000 11.5500 11.2500 11.2500 23,793
11.5500 11.8500 11.4000 11.4000 30,480
11.5500 11.8500 11.5500 11.7000 22,033
11.8500 11.8500 11.4000 11.4000 29,813
Weekend
Weekend
11.4000 11.8500 11.1000 11.7000 31,467
3 · 8-K After market open · 12:05 ET 8-K ↗
11.1000 11.2500 10.9500 11.1000 24,067
11.2500 11.4000 10.9500 11.1000 32,073
11.7000 11.8500 11.2500 11.2500 49,967
11.5500 12.0000 11.5500 11.8500 35,107
Weekend
Weekend
11.7000 12.0000 11.7000 11.7000 39,293
11.8500 11.8500 11.5500 11.7000 30,193
11.5500 12.0000 11.4000 11.8500 45,967
11.4000 11.7000 11.4000 11.5500 47,007
2 · 10-Q Pre-market · 04:45 ET 10-Q ↗ 1 · 8-K Pre-market · 04:40 ET 8-K ↗
11.8500 12.0000 11.4000 11.4000 57,467
Weekend
Weekend
11.7000 12.0000 11.5500 11.8500 35,913
11.8500 12.1500 11.5500 11.5500 47,220
12.0000 12.3000 11.7000 11.8500 60,127
12.4500 12.7500 12.0000 12.1500 59,040
12.6000 12.6000 12.3000 12.4500 26,960
Weekend
Weekend
12.4500 12.7500 12.1500 12.3000 45,700
13.0500 13.0500 12.3000 12.4500 56,427
13.6500 14.1000 13.0500 13.0500 97,260
13.3500 14.7000 12.7500 13.8000 872,140
12.6000 12.7500 12.1500 12.3000 54,400
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.

29 424B5 424B5 (opens SEC filing in a new tab) Pre-market · 05:16 ET Summarise
28 8-K 8-K (opens SEC filing in a new tab) Pre-market · 04:00 ET Summarise
27 8-K 8-K (opens SEC filing in a new tab) Pre-market · 04:45 ET Summarise
26 10-Q 10-Q (opens SEC filing in a new tab) Pre-market · 04:30 ET Summarise
25 8-K 8-K (opens SEC filing in a new tab) Pre-market · 04:00 ET Summarise
24 8-K 8-K (opens SEC filing in a new tab) Pre-market · 04:30 ET Summarise
23 DEF 14A DEF 14A (opens SEC filing in a new tab) After market open · 13:30 ET Summarise
22 10-K 10-K (opens SEC filing in a new tab) After market open · 13:21 ET Summarise
21 8-K 8-K (opens SEC filing in a new tab) After market open · 13:20 ET Summarise
20 PRE 14A PRE 14A (opens SEC filing in a new tab) After market open · 12:52 ET Summarise
19 8-K 8-K (opens SEC filing in a new tab) After market open · 11:22 ET Summarise
18 424B5 424B5 (opens SEC filing in a new tab) After market open · 11:16 ET Summarise
17 424B3 424B3 (opens SEC filing in a new tab) After market open · 11:07 ET Summarise
16 8-K 8-K (opens SEC filing in a new tab) After market open · 11:30 ET Summarise
15 8-K 8-K (opens SEC filing in a new tab) Pre-market · 03:45 ET Summarise
14 8-K 8-K (opens SEC filing in a new tab) Pre-market · 03:00 ET Summarise
13 8-K 8-K (opens SEC filing in a new tab) Pre-market · 03:15 ET Summarise
12 8-K 8-K (opens SEC filing in a new tab) Pre-market · 03:30 ET Summarise
11 DEF 14A DEF 14A (opens SEC filing in a new tab) Pre-market · 03:30 ET Summarise
10 PRE 14A PRE 14A (opens SEC filing in a new tab) After market open · 12:00 ET Summarise
9 8-K 8-K (opens SEC filing in a new tab) Pre-market · 03:15 ET Summarise
8 10-Q 10-Q (opens SEC filing in a new tab) Pre-market · 03:45 ET Summarise
7 8-K 8-K (opens SEC filing in a new tab) Pre-market · 03:40 ET Summarise
6 8-K 8-K (opens SEC filing in a new tab) Pre-market · 03:50 ET Summarise
5 8-K 8-K (opens SEC filing in a new tab) After market open · 13:12 ET Summarise
4 8-K 8-K (opens SEC filing in a new tab) Pre-market · 04:36 ET Summarise
3 8-K 8-K (opens SEC filing in a new tab) After market open · 12:05 ET Summarise
2 10-Q 10-Q (opens SEC filing in a new tab) Pre-market · 04:45 ET Summarise
1 8-K 8-K (opens SEC filing in a new tab) Pre-market · 04:40 ET Summarise