Nasdaq · KOSS · stock
Koss Corp. (KOSS) stock price history
Every Nasdaq trading session of Koss Corp. from Mar 17, 1980 to Sep 28, 2026: 11,728 daily bars, adjusted for splits and dividends, with minute bars from Jul 13, 2026 forward. The full series is served by the API: a free key covers the last year, paid plans the whole history and minute bars.
KOSS adjusted close, 1980 to 2026
- $64.00
- All time high, 2021
- $5.70
- 52 week high, $3.30 low
- 11,728
- Daily sessions since 1980
Last updated Sep 28, 2026, the last stored session. Refreshes after each trading day. Full 1980 to 2026 series and minute bars.
KOSS key facts
- Koss Corp. (KOSS) closed at $4.08 on Sep 28, 2026 on Nasdaq.
- KOSS's all time high close is $64.00, set on Jan 29, 2021; its all time low close is $0.0917 on Dec 31, 1984.
- KOSS's 52 week range is $3.30 to $5.70.
- KOSS returned -22.4% over the year to Sep 28, 2026 and -75.6% over five years.
- Over ten years KOSS returned +92%, +6.7% a year compounded.
- KOSS's deepest drawdown was -96.4% from Jan 29, 2021 to Apr 17, 2024.
- DataCedar holds 11,728 daily sessions of KOSS history from Mar 17, 1980 and minute bars from Jul 13, 2026, adjusted for splits and dividends, served by the API under a key.
KOSS price chart, 1980 to 2026
KOSS returns
Price return from the last close on or before the window start to Sep 28, 2026, on adjusted closes.
| Period | Return |
|---|---|
| 1 month | +16.6% |
| 3 months | +2.3% |
| 6 months | +13.3% |
| Year to date | -2.9% |
| 1 year | -22.4% |
| 3 years | +35.5% |
| 5 years | -75.6% |
| 10 years | +91.5% |
| Since Mar 17, 1980 | +1,217% |
| Compound annual growth, 46.5 years | +5.7% |
KOSS records
Measured on the stored closes; every figure is reproducible from the API series.
- All time high close
- $64.00 on Jan 29, 2021
- All time low close
- $0.0917 on Dec 31, 1984
- 52 week high
- $5.70 on Oct 15, 2025
- 52 week low
- $3.30 on Sep 10, 2026
- Deepest drawdown
- -96.4% from Jan 29, 2021 to Apr 17, 2024, not yet recovered
- Best single session
- +480.0% on Jan 27, 2021
- Worst single session
- -45.3% on Feb 1, 2021
- Volatility, 1 year annualised
- 47.8%
- Sessions closing higher, 1 year
- 44%
- Growth of 1 since 1980
- 13.2×
- Best calendar year
- 1986, +300%
- Worst calendar year
- 1984, -81%
KOSS price history by year
Open is the first session's open, high and low span the year, close is the last session's close, and the return is close over the previous year's close. 1980 starts on Mar 17, 1980; 2026 runs to Sep 28, 2026.
| Year | Open | High | Low | Close | Return | Volume | Sessions |
|---|---|---|---|---|---|---|---|
| 2026 | $4.16 | $4.95 | $3.30 | $4.08 | -1.4% | 5.7M | 185 |
| 2025 | $7.48 | $8.59 | $4.00 | $4.14 | -43.9% | 21.5M | 250 |
| 2024 | $3.36 | $18.73 | $2.27 | $7.38 | +120.3% | 268.3M | 252 |
| 2023 | $4.96 | $6.75 | $2.62 | $3.35 | -32.3% | 10.3M | 250 |
| 2022 | $10.93 | $13.26 | $4.44 | $4.95 | -53.7% | 51M | 251 |
| 2021 | $3.31 | $127.45 | $2.82 | $10.68 | +210.5% | 551.6M | 252 |
| 2020 | $1.50 | $5.10 | $0.8000 | $3.44 | +123.4% | 28.8M | 253 |
| 2019 | $1.93 | $2.90 | $1.30 | $1.54 | -19.4% | 4.1M | 252 |
| 2018 | $2.41 | $4.69 | $1.70 | $1.91 | -38.2% | 16.6M | 251 |
| 2017 | $2.31 | $3.58 | $1.40 | $3.09 | +35.5% | 19.2M | 251 |
| 2016 | $1.96 | $3.69 | $1.51 | $2.28 | +14.0% | 3.1M | 252 |
| 2015 | $1.84 | $3.50 | $1.80 | $2.00 | +14.3% | 3.4M | 252 |
| 2014 | $4.94 | $6.51 | $1.26 | $1.75 | -65.2% | 3.2M | 252 |
| 2013 | $4.71 | $5.22 | $3.80 | $5.04 | +12.6% | 974.3K | 252 |
| 2012 | $4.53 | $5.35 | $4.15 | $4.47 | -0.5% | 620.3K | 250 |
| 2011 | $4.23 | $6.74 | $4.23 | $4.49 | +4.1% | 1.1M | 252 |
| 2010 | $4.54 | $4.97 | $3.10 | $4.31 | -5.0% | 2.3M | 252 |
| 2009 | $3.70 | $6.62 | $3.70 | $4.54 | +23.6% | 413.2K | 252 |
| 2008 | $6.67 | $7.58 | $3.66 | $3.68 | -45.8% | 463.2K | 253 |
| 2007 | $8.28 | $8.43 | $6.23 | $6.78 | -18.1% | 654.2K | 251 |
| 2006 | $8.39 | $10.26 | $6.44 | $8.28 | -4.5% | 1.4M | 251 |
| 2005 | $6.29 | $8.91 | $5.30 | $8.68 | +37.9% | 553.6K | 252 |
| 2004 | $6.52 | $8.37 | $5.82 | $6.29 | -3.5% | 526.2K | 252 |
| 2003 | $5.73 | $6.66 | $4.58 | $6.52 | +13.7% | 740.6K | 252 |
| 2002 | $4.43 | $5.80 | $4.19 | $5.73 | +34.9% | 680.2K | 252 |
| 2001 | $3.41 | $5.87 | $2.97 | $4.25 | +20.1% | 4M | 248 |
| 2000 | $2.02 | $4.66 | $1.91 | $3.54 | +62.2% | 4.6M | 252 |
| 1999 | $1.62 | $2.31 | $1.34 | $2.18 | +35.2% | 5.1M | 252 |
| 1998 | $1.76 | $2.24 | $1.36 | $1.61 | -4.3% | 4.7M | 252 |
| 1997 | $0.9168 | $2.22 | $0.9168 | $1.69 | +70.4% | 10.9M | 253 |
| 1996 | $0.8137 | $1.08 | $0.7335 | $0.9902 | +12.5% | 6.8M | 254 |
| 1995 | $1.54 | $1.60 | $0.7335 | $0.8802 | -44.2% | 10M | 252 |
| 1994 | $2.02 | $2.24 | $1.17 | $1.58 | -21.8% | 14.1M | 252 |
| 1993 | $0.7335 | $3.04 | $0.7151 | $2.02 | +161.9% | 28.9M | 253 |
| 1992 | $0.3301 | $0.8251 | $0.2934 | $0.7701 | +110.0% | 4.8M | 254 |
| 1991 | $0.2567 | $0.4217 | $0.2200 | $0.3667 | +42.9% | 1.9M | 253 |
| 1990 | $0.6418 | $0.6418 | $0.2017 | $0.2567 | -60.0% | 3.1M | 253 |
| 1989 | $0.5684 | $0.7335 | $0.4401 | $0.6418 | +12.9% | 6.6M | 252 |
| 1988 | $0.5134 | $0.8251 | $0.4584 | $0.5684 | +10.7% | 7.6M | 253 |
| 1987 | $0.6601 | $0.9352 | $0.4034 | $0.5134 | -22.2% | 8.1M | 253 |
| 1986 | $0.1650 | $0.7518 | $0.1650 | $0.6601 | +300.0% | 4.6M | 253 |
| 1985 | $0.1100 | $0.2750 | $0.0917 | $0.1650 | +80.0% | 1.6M | 252 |
| 1984 | $0.4951 | $0.5868 | $0.0917 | $0.0917 | -81.5% | 3.5M | 253 |
| 1983 | $0.6785 | $1.03 | $0.4401 | $0.4951 | -27.0% | 6.1M | 253 |
| 1982 | $0.9535 | $1.10 | $0.4401 | $0.6785 | -28.8% | 5.8M | 253 |
| 1981 | $0.5012 | $1.63 | $0.4645 | $0.9535 | +90.2% | 10.3M | 253 |
| 1980 | $0.3097 | $0.6031 | $0.2771 | $0.5012 | n/a | 3.9M | 201 |
KOSS monthly closes, last 12 months
| Month | Month end close | Change |
|---|---|---|
| September 2026 | $4.08 | +17.9% |
| August 2026 | $3.46 | -6.0% |
| July 2026 | $3.68 | -8.2% |
| June 2026 | $4.01 | -1.7% |
| May 2026 | $4.08 | -5.8% |
| April 2026 | $4.33 | +20.9% |
| March 2026 | $3.58 | -13.3% |
| February 2026 | $4.13 | -4.6% |
| January 2026 | $4.33 | +4.6% |
| December 2025 | $4.14 | -18.2% |
| November 2025 | $5.06 | +4.8% |
| October 2025 | $4.83 | -4.9% |
About the KOSS data
Daily bars. 11,728 sessions from Mar 17, 1980 to Sep 28, 2026, one row per Nasdaq trading day with open, high, low, close and volume. Prices are adjusted for splits and cash dividends so the series is comparable across its whole length; the API also serves the raw, split only and dividend only views.
Minute bars. Stored from Jul 13, 2026 forward, most recent session Sep 28, 2026. Minute history is captured from the day collection began and is never backfilled, so this start date is exact. Five minute, fifteen minute and hourly bars are derived from these minutes.
Time and currency. Session dates are Nasdaq trading days; minute timestamps are UTC. Prices are in USD. Volume is shares traded on the session.
Get the data. The REST endpoint returns the daily series as JSON with pagination; a free key serves the last year, Quant and above the full history back to Mar 17, 1980, and minute bars come with the paid windows. It takes timeframe (1Min, 5Min, 15Min, 1Hour, 1Day), adjustment, start and end. See the bars endpoint and authentication, and pricing for the plan windows.
curl "https://api.datacedar.com/v3/stocks/KOSS/bars?timeframe=1Day&adjustment=all&limit=50000" \
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Common questions
KOSS share price history
