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Side-by-side financial comparison of KOSS CORP (KOSS) and SES AI Corp (SES). Click either name above to swap in a different company.

SES AI Corp is the larger business by last-quarter revenue ($4.6M vs $2.9M, roughly 1.6× KOSS CORP). KOSS CORP runs the higher net margin — -19.8% vs -373.5%, a 353.7% gap on every dollar of revenue. KOSS CORP produced more free cash flow last quarter ($-1.1M vs $-11.1M).

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

SES S.A. is a Luxembourgish communications satellite operator supplying video and data connectivity worldwide to broadcasters, content and internet service providers, mobile and fixed network operators, governments and institutions.

KOSS vs SES — Head-to-Head

Bigger by revenue
SES
SES
1.6× larger
SES
$4.6M
$2.9M
KOSS
Higher net margin
KOSS
KOSS
353.7% more per $
KOSS
-19.8%
-373.5%
SES
More free cash flow
KOSS
KOSS
$10.0M more FCF
KOSS
$-1.1M
$-11.1M
SES

Income Statement — Q2 FY2026 vs Q4 FY2025

Metric
KOSS
KOSS
SES
SES
Revenue
$2.9M
$4.6M
Net Profit
$-565.4K
$-17.0M
Gross Margin
29.0%
11.3%
Operating Margin
-35.5%
-387.7%
Net Margin
-19.8%
-373.5%
Revenue YoY
-19.6%
Net Profit YoY
-700.6%
50.7%
EPS (diluted)
$-0.06
$-0.05

Green = leading value per metric. Periods may differ when fiscal calendars don't align.

8-Quarter Revenue & Profit Trend

Side-by-side quarterly history. Quarters aligned by calendar period so offset fiscal years line up.

Revenue
KOSS
KOSS
SES
SES
Q4 25
$2.9M
$4.6M
Q3 25
$4.1M
$7.1M
Q2 25
$3.1M
$3.5M
Q1 25
$2.8M
$5.8M
Q4 24
$3.6M
Q3 24
$3.2M
Q2 24
$2.9M
Q1 24
$2.6M
Net Profit
KOSS
KOSS
SES
SES
Q4 25
$-565.4K
$-17.0M
Q3 25
$243.7K
$-20.9M
Q2 25
$-232.7K
$-22.7M
Q1 25
$-316.7K
$-12.4M
Q4 24
$94.1K
Q3 24
$-419.5K
Q2 24
$-110.4K
Q1 24
$-313.8K
Gross Margin
KOSS
KOSS
SES
SES
Q4 25
29.0%
11.3%
Q3 25
40.0%
51.1%
Q2 25
36.0%
73.7%
Q1 25
39.0%
78.7%
Q4 24
39.5%
Q3 24
36.6%
Q2 24
40.4%
Q1 24
31.9%
Operating Margin
KOSS
KOSS
SES
SES
Q4 25
-35.5%
-387.7%
Q3 25
-1.1%
-262.0%
Q2 25
-14.2%
-652.3%
Q1 25
-18.7%
-401.7%
Q4 24
-4.0%
Q3 24
-19.9%
Q2 24
-11.0%
Q1 24
-23.1%
Net Margin
KOSS
KOSS
SES
SES
Q4 25
-19.8%
-373.5%
Q3 25
6.0%
-293.9%
Q2 25
-7.5%
-642.2%
Q1 25
-11.4%
-214.6%
Q4 24
2.6%
Q3 24
-13.1%
Q2 24
-3.8%
Q1 24
-11.9%
EPS (diluted)
KOSS
KOSS
SES
SES
Q4 25
$-0.06
$-0.05
Q3 25
$0.03
$-0.06
Q2 25
$-0.02
$-0.07
Q1 25
$-0.03
$-0.04
Q4 24
$0.01
Q3 24
$-0.05
Q2 24
$-0.01
Q1 24
$-0.03

Balance Sheet & Financial Strength

Snapshot of each company's liquidity, leverage and book value from the latest quarter.

Metric
KOSS
KOSS
SES
SES
Cash + ST InvestmentsLiquidity on hand
$15.5M
$29.5M
Total DebtLower is stronger
Stockholders' EquityBook value
$30.3M
$214.8M
Total Assets
$36.8M
$272.6M
Debt / EquityLower = less leverage

8-quarter trend — quarters aligned by calendar period.

Cash + ST Investments
KOSS
KOSS
SES
SES
Q4 25
$15.5M
$29.5M
Q3 25
$16.5M
$35.3M
Q2 25
$15.7M
$11.8M
Q1 25
$13.0M
$56.1M
Q4 24
$9.7M
Q3 24
$11.9M
Q2 24
$14.9M
Q1 24
$9.9M
Stockholders' Equity
KOSS
KOSS
SES
SES
Q4 25
$30.3M
$214.8M
Q3 25
$30.9M
$228.2M
Q2 25
$30.6M
$249.2M
Q1 25
$30.7M
$269.9M
Q4 24
$31.0M
Q3 24
$30.8M
Q2 24
$31.1M
Q1 24
$31.1M
Total Assets
KOSS
KOSS
SES
SES
Q4 25
$36.8M
$272.6M
Q3 25
$37.7M
$288.8M
Q2 25
$37.2M
$290.5M
Q1 25
$37.3M
$306.0M
Q4 24
$37.4M
Q3 24
$38.1M
Q2 24
$37.2M
Q1 24
$37.6M

Cash Flow & Capital Efficiency

How much cash each business actually produces after reinvestment. Cash flow is harder to manipulate than net income.

Metric
KOSS
KOSS
SES
SES
Operating Cash FlowLast quarter
$-760.8K
$-10.4M
Free Cash FlowOCF − Capex
$-1.1M
$-11.1M
FCF MarginFCF / Revenue
-37.5%
-243.7%
Capex IntensityCapex / Revenue
10.9%
15.6%
Cash ConversionOCF / Net Profit
TTM Free Cash FlowTrailing 4 quarters
$-546.7K
$-61.2M

8-quarter trend — quarters aligned by calendar period.

Operating Cash Flow
KOSS
KOSS
SES
SES
Q4 25
$-760.8K
$-10.4M
Q3 25
$762.6K
$-14.3M
Q2 25
$-534.9K
$-10.8M
Q1 25
$370.4K
$-22.8M
Q4 24
$-252.0K
Q3 24
$201.6K
Q2 24
$-174.0K
Q1 24
$328.6K
Free Cash Flow
KOSS
KOSS
SES
SES
Q4 25
$-1.1M
$-11.1M
Q3 25
$761.5K
$-14.7M
Q2 25
$-541.8K
$-11.6M
Q1 25
$306.2K
$-23.7M
Q4 24
$-314.3K
Q3 24
$-155.6K
Q2 24
$-174.8K
Q1 24
$269.3K
FCF Margin
KOSS
KOSS
SES
SES
Q4 25
-37.5%
-243.7%
Q3 25
18.7%
-206.9%
Q2 25
-17.6%
-329.6%
Q1 25
11.0%
-410.0%
Q4 24
-8.8%
Q3 24
-4.9%
Q2 24
-6.0%
Q1 24
10.2%
Capex Intensity
KOSS
KOSS
SES
SES
Q4 25
10.9%
15.6%
Q3 25
0.0%
6.0%
Q2 25
0.2%
22.8%
Q1 25
2.3%
15.8%
Q4 24
1.8%
Q3 24
11.2%
Q2 24
0.0%
Q1 24
2.3%
Cash Conversion
KOSS
KOSS
SES
SES
Q4 25
Q3 25
3.13×
Q2 25
Q1 25
Q4 24
-2.68×
Q3 24
Q2 24
Q1 24

Financial Flow Comparison

Revenue → gross profit → operating profit → net profit for each company.

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