KOSS Koss Corporation - Common Stock

NASDAQ · Consumer products · View on SEC EDGAR ↗
$3.61
Price · Aug 19, 2026
Fundamentals as of May 8, 2026

About Koss Corporation - Common Stock Company overview from Wikipedia

Koss Corporation is a company in Milwaukee, Wisconsin, US that manufactures headphones. The company created the first high-fidelity stereo headphones in 1958.

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Koss Corporation is a company in Milwaukee, Wisconsin, US that manufactures headphones. The company created the first high-fidelity stereo headphones in 1958.

History

John C. Koss founded the J.C. Koss Hospital Television Rental Company in 1953. After a short time Koss was looking for new ideas, and partnered with Martin Lange to eventually develop a stereo headphone. Based in Milwaukee, Wisconsin, United States, in 1991 Koss Audio & Video Electronics started producing and selling consumer electronics products as a separate company in Hazelwood, Missouri, United States. The Koss family owns more than 75% of the firm.

Having only a high school education, John C. Koss worked with Lange, an engineer, to develop the headphone that launched the company almost by accident, as they came upon the headphone idea as a result of an attempt to market a portable phonograph. What made this product unique was the privacy switch feature, which gave listeners the opportunity to listen to the first Koss SP/3 Stereophones. Initially, the product's purpose was to demonstrate to consumers the high-fidelity stereo sound of the portable phonograph.

Until then headphones had only been used in communications applications. In 1958 the design was introduced at a hi-fi trade show in Milwaukee, and audiences approved of it. Soon after the trade show, Koss went into business manufacturing and marketing stereophones from his basement apartment. The technology was imitated by competing manufacturers.

In the early 1970s, Koss worked out of two locations near each other. One was Koss TV-Rental, which also did electronics and musical instrument repairs; the second was the main facility two blocks to the east. At this time, Koss pioneered the high-end "electro-static" "ES series" headphone market. These headphones set the standard for wide-range frequency response. Being very durable, they required service for wear and tear on cords and earpads during their lifespan, by K&M Electronics (Klenworth & Midwest based in Minneapolis), working out of the TV Rental location. Koss headphones were easy and cost-effective to repair. At this site, a separate garage was set up to support the musical instrument and electronics repair business. The TV rental and repair site was managed by John's brother Pete Koss. Eventually, Koss dominated the headphone market, competing mainly with Telex. Koss was considered a higher quality unit at the time, offering a wide line of models.

In the late 1970s, to accommodate rapid growth, Koss moved to its present location on the north side of Milwaukee.

in the 1980s, Koss tried to diversify, unsuccessfully, into related areas of electronics; in 1984 the company filed for bankruptcy protection after a net loss that year of US$6 million (equivalent to $18.59 million in 2025). Koss emerged from Chapter 11 bankruptcy proceedings in 1985.

In 1991, Michael J. Koss, son of founder John C. Koss, took over as president and chief executive officer.

In December 2009, former vice president of finance Sujata "Sue" Sachdeva was charged in federal court with wire fraud after the firm discovered her embezzlement of US$34 million (equivalent to $51.02 million in 2025), and sentenced to eleven years in federal prison, of which she served six years. Koss was forced to restate five years of financials. It was able to recoup over US$12 million from its former auditor, from Sachdeva's credit card company, and by auctioning Sachdeva's stolen merchandise.

In 2020, Koss sued Apple, Bose, JLAB Audio, Plantronics Inc., and Skullcandy for patent infringement. In July 2022 Koss and Apple reached a settlement for an undisclosed amount regarding the alleged patent infringement on Koss' intellectual property.

During the 2021 GameStop short squeeze, the executives and directors of Koss earned US$40 million by selling company stock. This was more than the value of the Koss Corporation at the end of 2020.

Products

Koss headphones were also sold in RadioShack stores under their own brand. The Koss Plug and Koss Spark Plug are in-ear passive noise-isolating earphones; they can be adapted to take the high-end Etymotics ear tip, becoming the "Koss Hybrid". Other models include the Koss Porta Pro and well-regarded budget-priced headphones including the KSC series. Since 1989, all headphones manufactured in North America by KOSS come with a limited lifetime warranty covering normal use by the initial owner. Returning to the pre-Koss use of headphones, Koss produces communications headsets with microphone.

Source: Wikipedia, CC BY-SA 4.0 · View on Wikipedia ↗

Wikidata ↗

KOSS Stock Snapshot Price, market cap, P/E, EPS, ROE, debt/equity, 52-week range

Price
$3.60
Market Cap
$34M
P/E (TTM)
-40.1
EPS (TTM)
$-0.09
Revenue (TTM)
$13M
Div Yield
ROE
-2.8%
Debt/Equity
52W Range
$4 – $7

KOSS Stock Price Chart Daily OHLCV with technical indicators — pan, zoom, and customize your view

10-Year Performance Revenue, net income, margins and EPS trends

Revenue & Net Income $13M
10-point trend, -51.4%
2016-06-30 2025-06-30
EPS $-0.09
10-point trend, -147.4%
2016-06-30 2025-06-30
Free Cash Flow $-705.6K
10-point trend, -422.0%
2016-06-30 2025-06-30
Margins -6.9%
10-point trend, +9.9%
2016-06-30 2025-06-30

Valuation P/E, P/S, P/B, EV/EBITDA ratios — is the stock expensive or cheap?

Metric
5Y trend
KOSS
Peer Median
P/E (TTM)
5-point trend, -112.2%
-40.1
34.0
P/S (TTM)
5-point trend, -62.6%
2.7
1.3
P/B
5-point trend, -84.6%
1.1
2.3
Price / FCF
5-point trend, +91.4%
-48.4

Profitability Gross, operating and net margins; ROE, ROA, ROIC

Metric
5Y trend
KOSS
Peer Median
Gross Margin
5-point trend, +9.8%
37.8%
29.3%
Operating Margin
5-point trend, -588.0%
-13.8%
Net Profit Margin
5-point trend, -373.9%
-6.9%
-6.8%
ROA
5-point trend, -216.3%
-2.4%
-7.1%
ROE
5-point trend, -210.5%
-2.8%
-13.4%
ROIC
5-point trend, -192.4%
-5.8%

Financial Health Debt, liquidity, solvency — balance sheet strength

Metric
5Y trend
KOSS
Peer Median
Current Ratio
5-point trend, +53.8%
11.7
1.6
Quick Ratio
5-point trend, +93.7%
8.7

Growth Revenue, EPS and net income growth: YoY, 3Y CAGR, 5Y CAGR

Metric
5Y trend
KOSS
Peer Median
Revenue YoY
5-point trend, -35.4%
2.9%
Revenue CAGR 3Y
5-point trend, -35.4%
-10.7%
Revenue CAGR 5Y
5-point trend, -35.4%
-7.2%

Per Share Metrics EPS, book value per share, cash flow per share, dividend per share

Metric
5Y trend
KOSS
Peer Median
EPS (Diluted)
5-point trend, -280.0%
$-0.09

Capital Efficiency Asset turnover, inventory turnover, receivables turnover

Metric
5Y trend
KOSS
Peer Median

Dividends Yield, payout ratio, dividend history, 5Y CAGR

Dividend Yield
Payout Ratio
5Y Div CAGR
Ex-dateAmount
March 27, 2014$0.0600
Dec. 26, 2013$0.0600
Sept. 26, 2013$0.0600
June 26, 2013$0.0600
March 26, 2013$0.0600
Dec. 12, 2012$0.0600
Sept. 26, 2012$0.0600
June 27, 2012$0.0600
March 28, 2012$0.0600
Dec. 28, 2011$0.0600
Sept. 28, 2011$0.0600
June 28, 2011$0.0600
March 29, 2011$0.0600
Dec. 29, 2010$0.0600
Sept. 28, 2010$0.0600
June 28, 2010$0.0600
March 29, 2010$0.0600
Dec. 29, 2009$0.0600
Sept. 28, 2009$0.0650
June 26, 2009$0.0650

Earnings History EPS actual vs estimate, surprise %, beat rate, next earnings date

Next Report
Aug 20, 2026
Period EPS Actual EPS Est Surprise
Sept. 30, 2026 $-0.06
June 30, 2026 $-0.06
Sept. 30, 2025 $-0.03
Sept. 30, 2024 $-0.03
June 30, 2024 $-0.03

Peer comparison (GICS sub-industry) Key metrics vs sector peers

Ticker Market Cap P/E Rev YoY Net Margin ROE Gross Margin
KOSS $48M -56.7 2.9% -6.9% -2.8% 37.8%
SONO $1.84B -30.0 -4.9% -4.2% -16.6% 43.7%
GPRO -2.4 -18.6% -14.3% -107.2% 33.6%
UEIC $94M -2.6 -6.7% -5.1% -12.4% 28.9%
RIME $3M -0.2 1378.5% -361.4% -3341.3% -29.9%

Full Fundamentals All metrics by year — income statement, balance sheet, cash flow

Income Statement 17
Annual Income Statement data for KOSS
Metric Trend 202520242023202220212020201920182017201620152014
Revenue 12-point trend, -47.0% $13M $12M $13M $18M $20M $18M $22M $24M $24M $26M $24M $24M
Cost of Revenue 12-point trend, -55.9% $8M $8M $9M $11M $13M $13M $15M $17M $17M $17M $16M $18M
Gross Profit 12-point trend, +1793.9% $5M $4M $4M $7M $7M $6M $7M $7M $7M $9M $8M $-281.8K
R&D Expense 11-point trend, -79.1% $213.9K $238.1K $288.2K $285.2K $410.6K $397.4K · $427.0K $213.7K $91.3K $0 $1M
SG&A Expense 12-point trend, -37.8% $7M $6M $29M $6M $7M $6M $7M $7M $8M $8M $8M $10M
Operating Expenses 2-point trend, -18.4% · · · · · · · · · · $8M $10M
Operating Income 10-point trend, +82.6% $-2M $-2M $-25M $902.0K $-390.5K $-484.0K $276.3K $-364.2K · · $512.8K $-10M
Interest Expense 4-point trend, -59.3% · · · · · · · $5.2K $964 $6.1K $12.8K ·
Other Non-op 3-point trend, +3626.7% · · $33M $362.4K $885.5K · · · · · · ·
Pretax Income 12-point trend, +91.4% $-857.3K $-1M $9M $1M $497.7K $-463.9K $279.5K $-369.4K $-773.1K $2M $500.0K $-10M
Income Tax 12-point trend, +100.4% $17.5K $-73.6K $317.4K $7.5K $4.1K $1.7K $-26.5K $3M $190.5K $874.0K $17.4K $-4M
Net Income 12-point trend, +84.2% $-874.8K $-950.9K $8M $1M $493.6K $-465.6K $306.0K $-3M $-963.6K $1M $482.6K $-6M
EPS (Basic) 12-point trend, +88.0% $-0.09 $-0.10 $0.90 $0.14 $0.06 $-0.06 $0.04 $-0.46 $-0.13 $0.19 $0.07 $-0.75
EPS (Diluted) 12-point trend, +88.0% $-0.09 $-0.10 $0.85 $0.13 $0.05 $-0.06 $0.04 $-0.46 $-0.13 $0.19 $0.07 $-0.75
Shares (Basic) 12-point trend, +26.8% 9,363,117 9,251,373 9,192,799 9,070,277 7,864,688 7,404,831 7,401,030 7,382,706 7,382,706 7,382,706 7,382,706 7,382,706
Shares (Diluted) 8-point trend, +26.8% 9,363,117 9,251,373 9,753,760 9,985,662 9,639,273 7,404,831 7,407,827 7,382,706 · · · ·
EBITDA 12-point trend, +81.3% $-2M $-2M $-25M $1M $-87.9K $-153.4K $834.2K $526.3K $503.6K $487.1K $1M $-9M
Balance Sheet 25
Annual Balance Sheet data for KOSS
Metric Trend 202520242023202220212020201920182017201620152014
Cash & Equivalents 12-point trend, +47.8% $3M $3M $3M $9M $7M $4M $2M $1M $432.3K $735.4K $1M $2M
Short-term Investments 3-point trend, -24.5% $13M $12M $17M · · · · · · · · ·
Receivables 12-point trend, -64.1% $1M $1M $1M $2M $2M $2M $4M $5M $4M $4M $3M $3M
Inventory 12-point trend, -30.8% $5M $4M $6M $9M $6M $6M $7M $6M $8M $9M $7M $7M
Prepaid Expense 12-point trend, +398.2% $738.3K $1M $1M $188.5K $456.0K $267.6K $133.9K $206.8K $206.4K $281.1K $348.0K $148.2K
Current Assets 12-point trend, +41.7% $23M $22M $29M $20M $16M $12M $13M $12M $13M $14M $12M $16M
PP&E (Net) 12-point trend, -19.8% $1M $1M $953.9K $1M $1M $983.6K $890.1K $1M $1M $2M $2M $2M
PP&E (Gross) 12-point trend, +0.4% $9M $8M $9M $9M $10M $9M $9M $8M $9M $9M $9M $9M
Accum. Depreciation 12-point trend, +5.6% $7M $7M $8M $8M $8M $8M $8M $7M $8M $7M $8M $7M
Other Non-current Assets 12-point trend, +98.5% $13M $14M $9M $9M $9M $9M $9M $9M $9M $9M $7M $7M
Total Assets 12-point trend, +52.5% $37M $37M $39M $30M $26M $23M $23M $23M $23M $24M $22M $24M
Accounts Payable 12-point trend, -66.8% $819.3K $329.8K $267.5K $796.2K $398.4K $827.7K $1M $1M $2M $2M $2M $2M
Accrued Liabilities 12-point trend, -84.9% $582.1K $462.9K $1M $560.4K $665.6K $580.1K $650.5K $789.0K $1M $2M $2M $4M
Short-term Debt · · · · · $506.7K · · · · · ·
Current Liabilities 12-point trend, -70.1% $2M $1M $2M $2M $2M $3M $3M $3M $3M $4M $4M $6M
Capital Leases 8-point trend, -19.6% $2M $3M $3M $3M $2M $2M $3M $3M · · · ·
Other Non-current Liabilities 4-point trend, -51.2% · · · · · · · · $164.4K $178.3K $219.2K $336.8K
Total Liabilities 12-point trend, -28.1% $7M $6M $7M $7M $7M $7M $8M $9M $6M $6M $6M $9M
Total Debt · · · · · $506.7K · · · · · ·
Common Stock 12-point trend, +28.1% $47.3K $46.5K $46.2K $45.7K $43.0K $37.0K $37.0K $36.9K $36.9K $36.9K $36.9K $36.9K
Paid-in Capital · · · · · · $6M · · · · ·
Retained Earnings 12-point trend, +50.1% $17M $18M $19M $10M $9M $8M $9M $8M $12M $13M $12M $11M
Stockholders' Equity 12-point trend, +100.9% $31M $31M $32M $23M $20M $15M $15M $14M $18M $18M $16M $15M
Liabilities + Equity 12-point trend, +52.5% $37M $37M $39M $30M $26M $23M $23M $23M $23M $24M $22M $24M
Shares Outstanding 12-point trend, +28.1% 9,456,438 9,299,795 9,234,795 9,147,795 8,608,706 7,404,831 7,404,831 7,382,706 7,382,706 7,382,706 7,382,706 7,382,706
Cash Flow 16
Annual Cash Flow data for KOSS
Metric Trend 202520242023202220212020201920182017201620152014
D&A 9-point trend, -60.1% · · · $293.5K $302.6K $330.6K $429.8K $526.3K $503.6K $487.1K $559.6K $734.7K
Stock-based Comp 8-point trend, -90.4% $31.8K $155.8K $289.7K $463.6K $619.1K $549.6K $515.7K $331.6K · · · ·
Deferred Tax 7-point trend, +100.5% · · · · · $13.3K $-13.3K $3M $170.3K $702.0K $284.8K $-3M
Amort. of Intangibles 2-point trend, -100.0% · · · · · · · · · · $0 $364.5K
Other Non-cash 9-point trend, -119.5% · · · $-3M $-1M $1M $172.9K $1M $811.1K $-5M $-4M $15M
Operating Cash Flow 12-point trend, -106.0% $-214.9K $-190.5K $11M $-942.5K $348.7K $2M $1M $1M $234.3K $314.6K $-340.6K $4M
CapEx 12-point trend, -8.4% $490.7K $461.8K $98.4K $108.2K $600.2K $424.2K $187.8K $250.6K $403.4K $449.8K $326.6K $535.9K
Investing Cash Flow 8-point trend, +68.5% $-120.3K $-198.4K $-17M $2M $-704.2K $-537.3K $-311.0K $-381.8K · · · ·
Debt Issued · · · · · $506.7K · · · · · ·
Net Debt Issued · · · · · $506.7K · · · · · ·
Dividends Paid 2-point trend, -100.0% · · · · · · · · · · $0 $2M
Financing Cash Flow 7-point trend, +555.4% $305.9K $135.0K $171.3K $1M $3M $506.7K $46.7K · · · · ·
Net Change in Cash 3-point trend, +172.8% · · · · · $2M $1M $649.2K · · · ·
Taxes Paid 9-point trend, -99.7% $4.8K $-67.4K $320.1K · · · $1.6K $3.2K $-523.3K $558.2K $-985.6K $2M
Free Cash Flow 12-point trend, -123.1% $-705.6K $-652.3K $11M $-1M $-251.4K $1M $1M $780.5K $-169.2K $-135.2K $-667.2K $3M
Levered FCF 3-point trend, +624.8% · · · · · · · $729.0K $-170.4K $-138.9K · ·
Profitability 8
Annual Profitability data for KOSS
Metric Trend 202520242023202220212020201920182017201620152014
Gross Margin 12-point trend, +3304.2% 37.8% 34.1% 34.0% 37.6% 34.4% 30.9% 31.2% 28.0% 28.7% 34.4% 34.9% -1.2%
Operating Margin 9-point trend, +67.2% -13.8% -15.3% -190.1% 5.1% -2.0% -2.6% 1.8% · · · 2.1% -42.0%
Net Margin 12-point trend, +70.2% -6.9% -7.8% 63.4% 7.2% 2.5% -2.5% 2.0% -14.4% -4.0% 5.3% 2.0% -23.3%
Pretax Margin 12-point trend, +83.7% -6.8% -8.3% 65.8% 7.2% 2.5% -2.5% 1.9% -1.5% -3.2% 8.7% 2.1% -41.8%
EBITDA Margin 12-point trend, +64.6% -13.8% -15.3% -190.1% 6.8% -0.45% -0.84% 3.8% 2.2% 2.1% 1.9% 4.4% -38.9%
ROA 12-point trend, +87.4% -2.4% -2.5% 24.3% 4.5% 2.0% -2.0% 1.9% -15.7% -4.0% 6.0% 2.1% -18.6%
ROE 12-point trend, +90.6% -2.8% -3.0% 26.2% 5.7% 2.6% -3.1% 2.9% -21.1% -5.4% 8.0% 3.1% -30.3%
ROIC 9-point trend, +84.2% -5.8% -5.6% -76.2% 4.0% -2.0% -3.1% 2.9% · · · 3.0% -36.6%
Liquidity & Solvency 3
Annual Liquidity & Solvency data for KOSS
Metric Trend 202520242023202220212020201920182017201620152014
Current Ratio 12-point trend, +374.5% 11.7 16.9 14.1 9.3 7.6 4.6 4.3 4.7 3.8 3.8 3.6 2.5
Quick Ratio 12-point trend, +1013.0% 8.7 12.4 10.7 5.2 4.5 2.4 2.0 2.2 1.3 1.2 1.0 0.8
Debt / Equity · · · · · 0.0 · · · · · ·
Efficiency 3
Annual Efficiency data for KOSS
Metric Trend 202520242023202220212020201920182017201620152014
Asset Turnover 12-point trend, -57.6% 0.3 0.3 0.4 0.6 0.8 0.8 0.9 1.1 1.0 1.1 1.0 0.8
Inventory Turnover 12-point trend, -17.3% 1.7 1.5 1.1 1.5 2.2 2.0 2.3 2.3 2.0 2.2 2.2 2.0
Receivables Turnover 12-point trend, +246.7% 10.8 9.5 8.1 8.6 8.6 6.1 5.2 5.4 6.4 8.2 8.1 3.1
Per Share 6
Annual Per Share data for KOSS
Metric Trend 202520242023202220212020201920182017201620152014
Book Value / Share 12-point trend, +56.8% $3.24 $3.35 $3.41 $2.48 $2.27 $2.05 $2.04 $1.97 $2.38 $2.46 $2.21 $2.06
Revenue / Share 7-point trend, -54.3% $1.35 $1.33 $1.34 $1.76 $2.03 $2.47 $2.95 · · · · ·
Cash Flow / Share 7-point trend, -112.1% $-0.02 $-0.02 $1.10 $-0.09 $0.04 $0.24 $0.19 · · · · ·
Cash / Share 12-point trend, +15.4% $0.30 $0.31 $0.33 $1.01 $0.81 $0.54 $0.30 $0.15 $0.06 $0.10 $0.14 $0.26
Dividend / Share 2-point trend, -100.0% · · · · · · · · · · $0 $0
EPS (TTM) 12-point trend, +88.0% $-0.09 $-0.10 $0.85 $0.13 $0.05 $-0.06 $0.04 $-0.46 $-0.13 $0.19 $0.07 $-0.75
Growth Rates 5
Annual Growth Rates data for KOSS
Metric Trend 202520242023202220212020201920182017201620152014
Revenue YoY 5-point trend, -56.5% 2.9% -6.4% -26.0% -9.4% 6.7% · · · · · · ·
Revenue CAGR 3Y 3-point trend, -0.9% -10.7% -14.4% -10.6% · · · · · · · · ·
Revenue CAGR 5Y -7.2% · · · · · · · · · · ·
EPS YoY 2-point trend, +246.2% · · 553.9% 160.0% · · · · · · · ·
Net Income YoY 2-point trend, +254.1% · · 555.9% 157.0% · · · · · · · ·
Valuation (TTM) 17
Annual Valuation (TTM) data for KOSS
Metric Trend 202520242023202220212020201920182017201620152014
Revenue TTM 12-point trend, -47.0% $13M $12M $13M $18M $20M $18M $22M $24M $24M $26M $24M $24M
Net Income TTM 12-point trend, +84.2% $-874.8K $-950.9K $8M $1M $493.6K $-465.6K $306.0K $-3M $-963.6K $1M $482.6K $-6M
Market Cap 12-point trend, +104.8% $48M $41M $34M $64M $200M $10M $15M $17M $13M $15M $17M $24M
Enterprise Value · · · · · $7M · · · · · ·
P/E 12-point trend, -1232.3% -56.7 -44.5 4.4 53.5 464.4 -22.7 50.0 -5.1 -13.9 10.7 33.0 -4.3
P/S 12-point trend, +286.7% 3.8 3.4 2.6 3.6 10.2 0.5 0.7 0.7 0.6 0.6 0.7 1.0
P/B 12-point trend, +2.0% 1.6 1.3 1.1 2.8 10.2 0.7 1.0 1.2 0.8 0.8 1.0 1.5
P / Tangible Book 6-point trend, +137.1% 1.6 1.3 1.1 2.8 10.2 0.7 · · · · · ·
P / Cash Flow 12-point trend, -3522.2% -224.4 -217.2 3.2 -67.5 573.2 5.6 10.5 16.8 57.0 47.6 -50.1 6.6
P / FCF 12-point trend, -986.8% -68.3 -63.4 3.2 -60.5 -795.1 7.3 12.1 22.2 -79.0 -110.9 -25.6 7.7
EV / EBITDA · · · · · -42.9 · · · · · ·
EV / FCF · · · · · 4.8 · · · · · ·
EV / Revenue · · · · · 0.4 · · · · · ·
Dividend Yield 2-point trend, -100.0% · · · · · · · · · · 0.00% 7.5%
Earnings Yield 12-point trend, +92.5% -1.8% -2.2% 23.0% 1.9% 0.22% -4.4% 2.0% -19.6% -7.2% 9.4% 3.0% -23.5%
Payout Ratio 2-point trend, +100.0% · · · · · · · · · · 0.00% -31.9%
Annual Payout 2-point trend, -100.0% · · · · · · · · · · $0 $2M

Financial Statements Income statement, balance sheet, cash flow — annual, last 5 years

Income Statement
2025-06-302024-06-302023-06-302022-06-302021-06-30
Revenue $13M$12M$13M$18M$20M
Gross Margin % 37.8%34.1%34.0%37.6%34.4%
Operating Margin % -13.8%-15.3%-190.1%5.1%-2.0%
Net Income $-874.8K$-950.9K$8M$1M$493.6K
Diluted EPS $-0.09$-0.10$0.85$0.13$0.05
Balance Sheet
2025-06-302024-06-302023-06-302022-06-302021-06-30
Current Ratio 11.716.914.19.37.6
Quick Ratio 8.712.410.75.24.5
Cash Flow
2025-06-302024-06-302023-06-302022-06-302021-06-30
Free Cash Flow $-705.6K$-652.3K$11M$-1M$-251.4K

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Institutional owners (13F) 24 filers · $1.7M total · As of June 30, 2026

Institutions that report holding this stock in their quarterly SEC Form 13F. Long positions only; a single filer may appear twice for separate option legs. Large offsetting put/call legs typically reflect market-making or hedged inventory, not directional conviction.

Institutional activity — Q2 2026 vs prior quarter
New positions Exited positions Increased Decreased Net shares change
6 (+4 vs prior Q) 3 (0 vs prior Q) 2 (-1 vs prior Q) 4 (-1 vs prior Q) +240K

Compared to Q1 2026. SEC Form 13F filings are due within 45 days of quarter-end plus a short buffer for late filers — quarters still inside that window are skipped in favor of the most recent fully-reported pair.

Institution Value Shares % of tracked 13F Type
VANGUARD CAPITAL MANAGEMENT LLC $760,324 189,607 44.72% Shares
GEODE CAPITAL MANAGEMENT, LLC $185,680 46,294 10.92% Shares
CITADEL ADVISORS LLC $132,563 33,058 7.80% Shares
VANGUARD GROUP INC $129,764 31,344 7.63% Shares
VANGUARD FIDUCIARY TRUST CO $123,267 30,740 7.25% Shares
DIMENSIONAL FUND ADVISORS LP $97,976 24,433 5.76% Shares
STATE STREET CORP $72,076 17,974 4.24% Shares
JAMES INVESTMENT RESEARCH, INC. $62,055 15,475 3.65% Shares
NewEdge Advisors, LLC $62,055 15,475 3.65% Shares
NORTHERN TRUST CORP $41,251 10,287 2.43% Shares
Vanguard Global Advisers, LLC $8,180 2,040 0.48% Shares
UBS Group AG $7,451 1,858 0.44% Shares
BlackRock, Inc. $4,231 1,055 0.25% Shares
Activest Wealth Management $4,010 1,000 0.24% Shares
N.E.W. Advisory Services LLC $4,010 1,000 0.24% Shares
Tower Research Capital LLC (TRC) $2,695 672 0.16% Shares
CREATIVE FINANCIAL DESIGNS INC /ADV $1,203 300 0.07% Shares
SBI Securities Co., Ltd. $481 120 0.03% Shares
MORGAN STANLEY $321 80 0.02% Shares
OSAIC HOLDINGS, INC. $200 50 0.01% Shares
BARCLAYS PLC $92 23 0.01% Shares
Crewe Advisors LLC $81 20 0.00% Shares
Parallel Advisors, LLC $36 9 0.00% Shares
Caitong International Asset Management Co., Ltd $8 2 0.00% Shares

Company insiders 20 insiders · 8 officers · 8 directors

Insider Role Last activity Shares owned Buys 12m Sells 12m Net 12m
Michael J Koss President and CEO Feb. 17, 2026 J 0 0 0 $0
Kim M. Schulte Chief Financial Officer May 6, 2026 A 0 0 $0
David Donnan Smith Chief Financial Officer Nov. 2, 2021 M 0 0 0 $0
Michael J Koss Jr Executive Vice President May 6, 2026 A 26,000 0 0 $0
John C Koss JR Vice President - Sales June 12, 2025 M 196,028 0 0 $0
Elizabeth A Uecker Secretary July 25, 2018 A 0 0 $0
Sujata Sachdeva VP-Finance, Secretary June 6, 2006 S 0 0 0 $0
Christopher Gantz VP, Communication Products May 14, 2004 S 10,900 0 0 $0
Lenore Lillie Director Dec. 2, 2025 P 2,500 1 0 $12,400
William Jesse Sweasy Director June 2, 2022 P 20,000 0 0 $0
Theodore Nixon Director May 28, 2021 M 0 0 0 $0
Thomas L. Doerr Director May 18, 2021 M 0 0 0 $0
Steven A Leveen Director Feb. 1, 2021 S 0 0 0 $0
Lawrence S. Mattson Director Feb. 1, 2012 A 0 0 $0
John J Stollenwerk Director Feb. 1, 2012 A 32,562 0 0 $0
Koss Family Trust, Dated 9/11/12 10% owner March 23, 2022 Z 0 0 0 $0
KFT Corp 10% owner March 23, 2022 Z 0 0 0 $0
Nancy Koss 2012 Trust, Dated 12/20/12 10% owner Feb. 2, 2021 S 757,949 0 0 $0
John C Koss May 29, 2013 P 4,000 0 0 $0
Jill Mccurdy Oct. 19, 2004 M 0 0 0 $0

Insiders from SEC Form 3/4/5 filings; net = open-market P/S only

Activists & 5%+ owners 4 positions

Investors who filed SEC Schedule 13D — beneficial ownership above 5% with an intent to influence the issuer (activist stakes, board campaigns, M&A). Each row shows the most recent known state of that filer's position.

Filer Filed Stake Status Purpose Filing
John C. Koss Jr. ×5 filings June 3, 2022 Initial filing Passive investment SEC
Michael J. Koss, Koss Family Trust, Dated 9/11/12, K.F.T. Corporation, Nancy L. Koss 2012 Trust, Dated 12/20/12 ×6 filings June 3, 2022 Initial filing Passive investment SEC
Nancy L. Koss, Nancy L Koss 2012 Trust, Dated 12/20/12 Oct. 15, 2013 Initial filing Passive investment SEC
John C. Koss, Koss Family Trust, Dated 9/11/12, K.F.T. Corporation Oct. 15, 2013 Initial filing Passive investment SEC

Purpose is an automated classification of the filer's own stated purpose (SEC Item 4) — not investment advice. "—" means no clear purpose was stated or the text could not be classified.

ETF ownership Held by 6 ETFs

Weight reflects direct equity holdings (N-PORT) only; leveraged or derivative-based funds may hold additional swap exposure not shown.

Fund Weight Units As of Source
IWC · iShares Trust 0.00% 19,211 SH Aug. 8, 2026 Daily
DFSU · Dimensional ETF Trust 0.00% 2,021 NS April 30, 2026 N-PORT
DCOR · Dimensional ETF Trust 0.00% 1,996 NS April 30, 2026 N-PORT
VXF · VANGUARD INDEX FUNDS 0.00% 67,462 SH Aug. 8, 2026 Daily
VTI · VANGUARD INDEX FUNDS 0.00% 122,145 SH Aug. 8, 2026 Daily
DFAC · Dimensional ETF Trust 0.00% 1,849 NS April 30, 2026 N-PORT