Koss Corporation KOSS

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Koss Corporation - Common Stock · Company · Nasdaq · Technology / Consumer Electronics

Paper trade (simulated — no real money)

Fill: USD 3.4550 · FX 1 USD = 1.277900 SGD · about SGD 4.4151 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 5.19 → 3.46 · -33.4%
5.1904.2753.360 1 2 3 4 5 6 7 8,9,10 11 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
3.5000 3.5500 3.4300 3.4550 18,394
3.6900 3.6900 3.4200 3.4800 19,800
3.5900 3.6200 3.4600 3.4700 28,500
3.6200 3.7200 3.5000 3.5600 31,400
3.6900 3.7300 3.5000 3.5600 23,400
Weekend
Weekend
11 · 8-K After market open · 14:12 ET 8-K ↗
3.7500 3.7700 3.6500 3.6600 23,400
3.7200 3.8500 3.6700 3.7400 22,300
3.8100 3.8900 3.7300 3.7900 24,100
3.8700 3.9400 3.8000 3.8300 22,100
3.8200 3.9500 3.6600 3.8400 18,100
Weekend
Weekend
3.7900 3.8900 3.6500 3.8400 21,500
3.7700 3.8800 3.6100 3.6900 35,500
3.8300 3.8300 3.7100 3.7300 22,000
3.8800 3.9300 3.7600 3.8400 27,300
3.8100 4.1000 3.8000 3.9000 43,400
Weekend
Weekend
3.9500 3.9500 3.7800 3.8600 23,500
4.0700 4.0700 3.9200 3.9400 24,000
3.9700 4.0300 3.9100 4.0200 16,300
4.0500 4.1200 3.8600 3.9800 40,100
4.0100 4.2000 3.9900 4.0800 99,800
Weekend
Weekend
4.3400 4.3400 3.8100 4.0000 78,900
4.0100 4.4400 3.9400 4.2000 263,400
3.5700 4.3300 3.4900 3.9500 470,900
3.4700 3.5400 3.4600 3.5000 38,400
3.5900 3.6200 3.4200 3.4700 19,200
Weekend
Weekend
3.5400 3.6200 3.4200 3.5900 29,600
3.4200 3.5900 3.4000 3.5300 18,300
3.4300 3.4800 3.3500 3.3600 14,000
3.6200 3.6200 3.3700 3.4000 5,700
3.4800 3.6200 3.4000 3.4300 18,200
Weekend
Weekend
3.3900 3.6300 3.3900 3.4100 26,200
3.4700 3.4800 3.3000 3.4000 9,400
3.5000 3.5000 3.4300 3.4600 7,400
3.6000 3.6000 3.4800 3.5500 9,000
No trading
Weekend
Weekend
3.4500 3.6500 3.4500 3.5800 17,000
3.5700 3.5700 3.4100 3.5400 14,900
3.4500 3.5300 3.4100 3.5000 25,400
3.4300 3.5500 3.3700 3.4400 20,300
3.5100 3.6000 3.4000 3.4600 12,500
Weekend
Weekend
3.4500 3.6500 3.3800 3.5000 21,200
10 · DEFA14A Next filing day · accepted 27 Aug, 18:14 ET DEFA14A ↗ 9 · DEF 14A Next filing day · accepted 27 Aug, 18:10 ET DEF 14A ↗ 8 · 10-K Next filing day · accepted 27 Aug, 18:01 ET 10-K ↗ 7 · 8-K After-hours · 17:19 ET 8-K ↗
3.4000 3.5100 3.3700 3.4200 31,200
3.4700 3.5500 3.4000 3.4400 16,300
3.5000 3.5200 3.4000 3.4500 17,200
3.5500 3.5900 3.5000 3.5000 14,900
Weekend
Weekend
3.5000 3.6100 3.5000 3.5700 16,100
3.5500 3.6600 3.4400 3.4400 17,800
3.6300 3.6300 3.5600 3.5600 9,800
3.7100 3.7100 3.5200 3.5800 22,100
3.6800 3.7800 3.6800 3.7000 8,600
Weekend
Weekend
3.7300 3.7500 3.7000 3.7500 19,200
3.7300 3.7300 3.6500 3.6700 13,300
3.7100 3.7600 3.6500 3.6500 5,700
3.7500 3.7800 3.7000 3.7400 11,100
3.7300 3.8300 3.7300 3.7800 6,800
Weekend
Weekend
3.6400 3.7800 3.6400 3.7200 7,500
3.6800 3.7700 3.6800 3.7300 7,300
3.7500 3.7800 3.6900 3.7300 15,800
3.7300 3.7500 3.7000 3.7000 16,900
3.7900 3.7900 3.6800 3.7300 47,300
Weekend
Weekend
3.7100 3.8100 3.6800 3.6800 12,600
3.6800 3.7900 3.6600 3.6800 12,200
3.6800 3.7400 3.6300 3.6300 20,100
3.6900 3.8000 3.6600 3.7200 15,500
3.7600 3.7700 3.6600 3.6600 13,900
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
6 · 10-Q Next filing day · accepted 07 May, 18:07 ET 10-Q ↗ 5 · 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
4 · 10-Q Next filing day · accepted 29 Jan, 18:10 ET 10-Q ↗ 3 · 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
2 · 10-Q Next filing day · accepted 30 Oct, 18:23 ET 10-Q ↗ 1 · 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

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 8-K 8-K (opens SEC filing in a new tab) After market open · 14:12 ET Summarise
10 DEFA14A DEFA14A (opens SEC filing in a new tab) Next filing day · accepted 27 Aug, 18:14 ET Summarise
9 DEF 14A DEF 14A (opens SEC filing in a new tab) Next filing day · accepted 27 Aug, 18:10 ET Summarise
8 10-K 10-K (opens SEC filing in a new tab) Next filing day · accepted 27 Aug, 18:01 ET Summarise
7 8-K 8-K (opens SEC filing in a new tab) After-hours · 17:19 ET Summarise
6 10-Q 10-Q (opens SEC filing in a new tab) Next filing day · accepted 07 May, 18:07 ET Summarise
5 8-K 8-K (opens SEC filing in a new tab) After-hours · 17:19 ET Summarise
4 10-Q 10-Q (opens SEC filing in a new tab) Next filing day · accepted 29 Jan, 18:10 ET Summarise
3 8-K 8-K (opens SEC filing in a new tab) After-hours · 17:18 ET Summarise
2 10-Q 10-Q (opens SEC filing in a new tab) Next filing day · accepted 30 Oct, 18:23 ET Summarise
1 8-K 8-K (opens SEC filing in a new tab) After-hours · 17:20 ET Summarise