Koss Corporation KOSS

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Koss Corporation - Common Stock · Company · Nasdaq

Paper trade (simulated — no real money)

Fill: USD 3.7500 · FX 1 USD = 1.289800 SGD · about SGD 4.8368 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 5.57 → 3.75 · -32.7%
6.5105.0053.500 1 2,3,4 5 6 7 8 9 10 11 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
3.8400 3.8400 3.6500 3.7500 18,700
3.8000 3.8600 3.7100 3.7600 12,800
3.8400 3.8600 3.7300 3.8600 14,100
3.8000 3.8300 3.7300 3.8000 18,900
3.7800 3.8600 3.7400 3.7600 13,000
Weekend
Weekend
3.8200 3.9000 3.7800 3.8000 23,500
3.9300 4.0300 3.8000 3.8600 19,600
3.8200 3.9700 3.8200 3.9700 12,600
3.9000 3.9500 3.7400 3.7900 46,900
3.9300 3.9700 3.9000 3.9000 5,100
Weekend
Weekend
3.8800 3.9500 3.8200 3.9500 18,200
3.8000 3.9900 3.7900 3.8700 17,600
3.8900 3.9500 3.7900 3.8200 20,600
4.0900 4.0900 3.9200 3.9200 23,600
4.0300 4.1300 3.8900 4.0900 46,400
Weekend
Weekend
No trading
3.9500 4.0200 3.8600 3.9700 4,600
4.0000 4.0800 3.9000 3.9000 25,000
3.9500 4.1500 3.9500 4.0100 12,400
3.9800 3.9900 3.9100 3.9900 6,000
Weekend
Weekend
3.9700 3.9900 3.9000 3.9900 24,600
3.9400 4.0000 3.8100 3.9500 26,900
3.9300 4.0600 3.9300 4.0100 16,600
3.9300 3.9900 3.8500 3.9800 17,000
3.9600 3.9900 3.8700 3.9300 18,900
Weekend
Weekend
No trading
4.0500 4.1200 3.9700 4.0300 45,500
4.0000 4.0800 3.8900 3.9500 23,900
3.9000 4.0300 3.8500 3.9800 20,700
3.9600 4.1000 3.8000 3.8000 35,200
Weekend
Weekend
3.9700 4.0100 3.9100 3.9100 16,100
3.9800 4.0100 3.9100 4.0100 19,700
3.9800 4.0400 3.9100 3.9100 41,400
4.1000 4.1600 3.9800 3.9800 24,600
3.9800 4.1000 3.9200 4.0900 23,000
Weekend
Weekend
4.0400 4.0800 3.9200 3.9800 19,700
3.9900 4.1000 3.9900 4.0700 15,400
4.0700 4.0800 3.9900 4.0400 15,900
4.1600 4.2500 4.0500 4.0700 27,300
4.0800 4.2400 3.9800 4.2300 38,200
Weekend
Weekend
4.0200 4.1600 4.0200 4.0800 14,200
4.0600 4.1500 4.0300 4.0800 12,800
4.1500 4.2000 4.0200 4.0200 20,000
3.9700 4.2600 3.9700 4.1900 48,700
No trading
Weekend
Weekend
4.1500 4.1900 3.9700 3.9700 35,600
4.0000 4.1200 3.8700 4.1200 17,700
3.9200 4.1000 3.8600 4.0000 18,400
3.9700 3.9900 3.8800 3.9300 12,000
3.9600 4.0300 3.8600 3.9600 14,200
Weekend
Weekend
3.8900 4.1100 3.8200 3.8600 26,800
3.8100 3.9500 3.8100 3.8700 13,600
3.8500 3.9300 3.7900 3.8000 23,000
3.8500 3.9400 3.7500 3.9400 35,200
4.1300 4.1300 3.7500 3.9000 81,700
Weekend
Weekend
4.2200 4.3200 4.1300 4.1600 21,300
11 · 10-Q Next filing day · accepted 07 May, 18:07 ET 10-Q ↗ 10 · 8-K After-hours · 17:19 ET 8-K ↗
4.4000 4.4000 4.1800 4.1800 12,200
4.3600 4.4500 4.3000 4.3000 13,800
4.2800 4.4100 4.2000 4.4100 29,700
4.4200 4.5700 4.2000 4.2200 33,100
Weekend
Weekend
4.2200 4.4700 4.1500 4.3600 18,000
4.1900 4.3300 4.1100 4.3300 10,400
4.3000 4.3000 4.0600 4.1800 22,600
4.1200 4.3700 4.1200 4.3000 8,100
4.4100 4.4400 4.1300 4.3500 12,200
Weekend
Weekend
4.5400 4.5600 4.2600 4.4200 28,600
4.4200 4.8300 4.4100 4.4800 74,700
4.1800 4.4500 4.1500 4.3300 67,800
4.1300 4.2600 4.0400 4.2300 99,200
4.1300 4.1900 3.9900 4.1300 34,500
Weekend
Weekend
4.1500 4.1900 4.0200 4.1700 36,600
4.1900 4.2600 4.0700 4.1000 53,200
3.7900 4.0200 3.7900 4.0200 27,500
3.8200 3.9200 3.8200 3.9200 9,900
3.8800 3.9000 3.8500 3.8600 10,800
Weekend
Weekend
3.8800 3.8800 3.8300 3.8600 5,600
3.8900 3.9400 3.8000 3.8600 20,800
3.8500 4.0000 3.7000 3.8000 24,400
3.7900 3.8300 3.6700 3.7700 11,200
3.6400 3.8900 3.6400 3.8000 12,100
Weekend
Weekend
No trading
3.6200 3.7500 3.5800 3.6800 7,900
3.6900 3.8300 3.6900 3.7400 12,700
3.5200 3.8000 3.5200 3.5800 8,800
3.6700 3.6700 3.5000 3.5000 21,800
Weekend
Weekend
3.7700 3.8300 3.5600 3.6000 11,500
3.9500 3.9600 3.7300 3.7400 17,700
4.0100 4.0100 3.8900 3.9300 6,700
4.0100 4.0600 3.9500 3.9700 19,600
3.6900 4.0600 3.6100 4.0100 38,700
Weekend
Weekend
3.9500 3.9500 3.6100 3.6200 46,000
3.9900 3.9900 3.7500 3.9000 52,900
3.9500 4.0000 3.9200 3.9200 9,500
3.9900 4.1300 3.9600 3.9600 29,600
3.9800 4.0600 3.9100 3.9200 27,000
Weekend
Weekend
3.9300 3.9900 3.9100 3.9100 26,900
4.0500 4.0900 3.9000 3.9200 34,100
4.1500 4.1500 4.0800 4.0800 20,300
4.0500 4.1900 4.0500 4.1000 14,900
4.0700 4.1500 4.0100 4.0600 25,000
Weekend
Weekend
4.0600 4.1500 4.0600 4.1100 11,000
4.1400 4.2000 4.0600 4.0700 14,300
4.1400 4.2100 4.1300 4.2000 11,400
4.1000 4.2100 4.1000 4.1700 19,600
4.1200 4.1600 4.0600 4.1000 8,300
Weekend
Weekend
4.0800 4.1300 4.0100 4.1300 26,200
4.1800 4.2200 4.0800 4.0800 17,500
4.2600 4.2700 4.1000 4.1800 22,100
4.1900 4.3300 4.1900 4.2600 11,300
4.2700 4.3900 4.1600 4.1800 8,400
Weekend
Weekend
4.1600 4.3500 4.1300 4.2600 13,100
4.1900 4.2200 4.0900 4.1700 19,900
4.1600 4.2900 4.1400 4.1600 19,300
4.3500 4.4100 4.1300 4.1500 65,400
No trading
Weekend
Weekend
4.3400 4.4600 4.3000 4.3800 10,100
4.3900 4.4800 4.3000 4.3300 15,900
4.5800 4.5800 4.3700 4.4000 19,200
4.6100 4.6500 4.5500 4.5500 23,300
4.5500 4.6400 4.5500 4.5800 28,300
Weekend
Weekend
4.6100 4.7500 4.5600 4.6800 19,100
4.7500 4.9500 4.5000 4.5700 61,800
4.6000 4.8400 4.6000 4.7900 18,800
4.8400 4.9000 4.5000 4.6200 61,500
4.3200 4.8500 4.3100 4.8200 105,300
Weekend
Weekend
4.5200 4.5500 4.3100 4.3300 20,100
9 · 10-Q Next filing day · accepted 29 Jan, 18:10 ET 10-Q ↗ 8 · 8-K After-hours · 17:18 ET 8-K ↗
4.3500 4.7300 4.3300 4.4900 99,500
4.3600 4.4600 4.3100 4.3500 16,000
4.5100 4.5200 4.3200 4.3900 21,800
4.4200 4.6600 4.2800 4.5000 69,900
Weekend
Weekend
4.5200 4.6900 4.4100 4.4200 26,500
4.5500 4.7100 4.4500 4.4900 53,300
4.3200 4.5200 4.3200 4.5200 29,000
4.3800 4.4700 4.2800 4.2800 11,400
No trading
Weekend
Weekend
4.4500 4.5600 4.3500 4.4700 46,300
4.3400 4.4700 4.3400 4.3900 19,700
4.3100 4.4600 4.2500 4.3400 21,700
4.5300 4.6200 4.2400 4.3200 48,700
4.3400 4.6800 4.3400 4.5300 46,000
Weekend
Weekend
4.3100 4.6700 4.2100 4.3700 188,400
4.2100 4.3700 4.2100 4.3100 47,800
4.3300 4.4100 4.1600 4.2800 35,600
4.4500 4.6500 4.2800 4.2800 124,400
4.2900 4.7000 4.2900 4.4800 132,400
Weekend
Weekend
4.1600 4.4000 4.1500 4.3400 31,400
No trading
4.1900 4.2500 4.1200 4.1400 41,900
4.3000 4.4200 4.2000 4.2000 43,300
4.4000 4.4100 4.3000 4.3100 26,400
Weekend
Weekend
4.4600 4.4900 4.4100 4.4900 16,900
No trading
4.4600 4.5000 4.4100 4.4600 6,200
4.4000 4.5000 4.3500 4.4700 26,000
4.3600 4.6000 4.3600 4.4200 48,200
Weekend
Weekend
4.5000 4.6400 4.2600 4.2800 72,000
4.5100 4.8000 4.4100 4.5400 146,800
4.5100 4.6200 4.4100 4.5000 40,200
4.5400 4.6500 4.5100 4.5100 14,900
4.6200 4.6500 4.5000 4.6000 32,700
Weekend
Weekend
4.7000 4.7200 4.5800 4.5800 16,000
4.6200 4.7600 4.6100 4.7200 12,600
4.7000 4.8600 4.6300 4.6500 21,900
4.5900 4.7700 4.5900 4.7700 24,800
4.9600 4.9600 4.5600 4.5900 83,700
Weekend
Weekend
4.8900 4.9000 4.8200 4.8200 19,100
4.8600 4.9300 4.8000 4.8500 18,300
4.9000 4.9700 4.8100 4.9400 21,700
4.9400 4.9900 4.8600 4.9000 19,800
4.9200 4.9800 4.8300 4.8500 11,300
Weekend
Weekend
4.7900 5.0600 4.7900 5.0600 25,000
No trading
4.8300 4.9200 4.7100 4.8100 28,400
4.7100 4.9100 4.6600 4.8000 23,100
4.6200 4.7400 4.6200 4.6200 24,400
Weekend
Weekend
4.5500 4.8200 4.5000 4.6600 56,500
4.6200 4.7200 4.5200 4.5700 14,700
4.6400 4.7000 4.5600 4.6200 12,800
4.7400 4.7400 4.6100 4.6400 12,600
4.8200 4.8700 4.6500 4.7500 17,400
Weekend
Weekend
4.7400 4.9900 4.7400 4.8200 11,000
4.9900 4.9900 4.7500 4.8000 21,500
4.9800 5.0700 4.8800 4.9200 22,800
5.0900 5.0900 4.8300 5.0100 33,600
4.5800 5.1000 4.5800 5.0900 71,600
Weekend
Weekend
4.4500 4.5500 4.3400 4.5000 34,300
4.7200 4.7800 4.4600 4.5400 25,000
4.6100 4.7600 4.6000 4.7100 26,600
4.7100 4.8800 4.5900 4.6100 52,000
4.8100 4.8500 4.7200 4.7800 18,400
Weekend
Weekend
5.1900 5.1900 4.8100 4.8300 41,500
7 · 10-Q Next filing day · accepted 30 Oct, 18:23 ET 10-Q ↗ 6 · 8-K After-hours · 17:20 ET 8-K ↗
4.9000 4.9000 4.7500 4.7900 29,900
5.0100 5.0200 4.8600 4.8900 26,700
5.0500 5.1600 5.0000 5.0600 26,900
5.1500 5.3000 5.0400 5.0800 54,600
Weekend
Weekend
5.1900 5.2100 5.0500 5.1900 33,100
4.9900 5.1200 4.9800 5.0400 29,600
5.4600 5.5900 4.8500 4.9700 153,800
5.0000 5.5000 5.0000 5.4800 122,000
5 · 8-K After market open · 10:37 ET 8-K ↗
4.9300 5.0600 4.9000 4.9900 27,000
Weekend
Weekend
5.1800 5.2700 4.7200 4.9100 87,700
5.3800 5.5100 5.1800 5.1800 31,200
5.1700 5.7000 5.1600 5.4000 241,500
4.8500 5.1500 4.8200 5.1100 21,400
4.9100 5.1000 4.8800 4.9400 30,700
Weekend
Weekend
4.9300 5.0300 4.8400 4.8600 40,100
4.9800 4.9900 4.8500 4.8900 55,100
5.0100 5.0900 4.9600 4.9600 32,000
5.0800 5.1800 4.9600 5.0300 30,500
5.2200 5.2200 5.1000 5.1300 32,900
Weekend
Weekend
5.2400 5.3200 5.1500 5.1900 40,500
5.2600 5.2600 5.1100 5.1800 42,900
5.0800 5.2500 5.0800 5.2200 29,600
5.2000 5.2500 5.0200 5.0800 29,100
5.2100 5.3000 5.1500 5.2000 29,600
Weekend
Weekend
5.3000 5.4300 5.1500 5.2600 29,200
5.4100 5.4600 5.2200 5.2600 20,800
5.5000 5.6300 5.3800 5.4500 26,600
5.6200 5.7000 5.5000 5.5000 33,200
5.6400 5.8500 5.6100 5.6700 32,700
Weekend
Weekend
5.7200 5.7600 5.6000 5.6700 30,900
5.7300 5.7900 5.7000 5.7700 22,400
5.7000 5.8800 5.5900 5.6800 31,100
5.7700 5.8000 5.6000 5.7000 32,800
5.6900 5.9100 5.6900 5.8000 75,900
Weekend
Weekend
5.7000 5.7600 5.6000 5.6900 31,700
5.8200 5.8700 5.7000 5.7200 51,300
6.0800 6.1200 5.7200 5.7800 81,800
6.0200 6.1300 5.9700 6.0700 51,500
6.2500 6.2900 6.0200 6.0600 41,500
Weekend
Weekend
6.1000 6.2400 5.9500 6.1500 23,500
6.1800 6.1800 6.0200 6.0700 25,200
6.2700 6.3300 6.1300 6.2000 40,300
6.1000 6.3100 6.0300 6.2300 40,500
No trading
Weekend
Weekend
6.3800 6.3900 6.1000 6.2000 32,800
4 · DEFA14A Next filing day · accepted 28 Aug, 18:30 ET DEFA14A ↗ 3 · DEF 14A Next filing day · accepted 28 Aug, 18:06 ET DEF 14A ↗ 2 · 10-K Next filing day · accepted 28 Aug, 17:55 ET 10-K ↗ 1 · 8-K After-hours · 17:20 ET 8-K ↗
6.3900 6.3900 6.1400 6.2100 59,500
6.5500 6.6800 6.3400 6.4100 47,000
6.1200 6.8500 6.0600 6.5100 154,300
6.4800 6.5500 6.3000 6.3600 90,500
Weekend
Weekend
6.2500 6.6000 6.2200 6.4800 60,100
6.0800 6.2900 6.0000 6.1600 33,500
6.5000 6.5600 6.0000 6.1000 84,100
6.9000 6.9300 6.2000 6.4800 378,400
5.7400 6.2000 5.7000 6.1400 149,000
Weekend
Weekend
5.5400 5.8000 5.5200 5.6900 66,400
5.3500 5.5900 5.3300 5.4700 35,100
5.4600 5.5000 5.3000 5.4800 40,600
5.3100 5.5400 5.3100 5.3600 23,700
5.5500 5.5800 5.2200 5.3300 37,700
Weekend
Weekend
5.4900 5.5800 5.3500 5.4800 28,400
5.7600 5.7600 5.4300 5.5600 36,600
5.7200 5.9300 5.6500 5.7300 26,300
5.4400 5.7800 5.4100 5.7200 68,600
5.3500 5.5500 5.3000 5.4200 31,100
Weekend
Weekend
5.2700 5.3900 5.1100 5.3900 48,600
5.4200 5.4200 5.2700 5.2800 38,700
5.5900 5.6500 5.3500 5.3500 94,200
5.6200 5.7700 5.3000 5.5800 94,800
5.5300 5.6600 5.3100 5.5700 70,300
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.

11 10-Q 10-Q (opens SEC filing in a new tab) Next filing day · accepted 07 May, 18:07 ET Summarise
10 8-K 8-K (opens SEC filing in a new tab) After-hours · 17:19 ET Summarise
9 10-Q 10-Q (opens SEC filing in a new tab) Next filing day · accepted 29 Jan, 18:10 ET Summarise
8 8-K 8-K (opens SEC filing in a new tab) After-hours · 17:18 ET Summarise
7 10-Q 10-Q (opens SEC filing in a new tab) Next filing day · accepted 30 Oct, 18:23 ET Summarise
6 8-K 8-K (opens SEC filing in a new tab) After-hours · 17:20 ET Summarise
5 8-K 8-K (opens SEC filing in a new tab) After market open · 10:37 ET Summarise
4 DEFA14A DEFA14A (opens SEC filing in a new tab) Next filing day · accepted 28 Aug, 18:30 ET Summarise
3 DEF 14A DEF 14A (opens SEC filing in a new tab) Next filing day · accepted 28 Aug, 18:06 ET Summarise
2 10-K 10-K (opens SEC filing in a new tab) Next filing day · accepted 28 Aug, 17:55 ET Summarise
1 8-K 8-K (opens SEC filing in a new tab) After-hours · 17:20 ET Summarise