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Side-by-side financial comparison of Arq, Inc. (ARQ) and NAPCO SECURITY TECHNOLOGIES, INC (NSSC). Click either name above to swap in a different company.

NAPCO SECURITY TECHNOLOGIES, INC is the larger business by last-quarter revenue ($48.2M vs $29.4M, roughly 1.6× Arq, Inc.). On growth, NAPCO SECURITY TECHNOLOGIES, INC posted the faster year-over-year revenue change (12.2% vs 8.8%). NAPCO SECURITY TECHNOLOGIES, INC produced more free cash flow last quarter ($14.5M vs $-3.5M). Over the past eight quarters, Arq, Inc.'s revenue compounded faster (16.4% CAGR vs -1.1%).

Arq, Inc. is a sustainable technology firm focused on processing coal mining waste to produce high-value, low-carbon solid fuels and industrial carbon products. It caters to customers across the energy, construction, and manufacturing sectors, with core markets in North America and major European regions, aiming to cut industrial waste and carbon footprints for its clients.

Napco Security Technologies, Inc. was set up in 1969 and now is based in Amityville, New York. The company focuses on security products, such as electronic locking devices, alarm systems, and building access control systems. The company was formerly known as Napco Security Systems, Inc.

ARQ vs NSSC — Head-to-Head

Bigger by revenue
NSSC
NSSC
1.6× larger
NSSC
$48.2M
$29.4M
ARQ
Growing faster (revenue YoY)
NSSC
NSSC
+3.4% gap
NSSC
12.2%
8.8%
ARQ
More free cash flow
NSSC
NSSC
$18.1M more FCF
NSSC
$14.5M
$-3.5M
ARQ
Faster 2-yr revenue CAGR
ARQ
ARQ
Annualised
ARQ
16.4%
-1.1%
NSSC

Income Statement — Q4 FY2025 vs Q2 FY2026

Metric
ARQ
ARQ
NSSC
NSSC
Revenue
$29.4M
$48.2M
Net Profit
$13.5M
Gross Margin
13.6%
58.6%
Operating Margin
-174.1%
30.6%
Net Margin
28.0%
Revenue YoY
8.8%
12.2%
Net Profit YoY
29.0%
EPS (diluted)
$-1.20
$0.38

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
ARQ
ARQ
NSSC
NSSC
Q4 25
$29.4M
$48.2M
Q3 25
$35.1M
$49.2M
Q2 25
$28.6M
$50.7M
Q1 25
$27.2M
$44.0M
Q4 24
$27.0M
$42.9M
Q3 24
$34.8M
$44.0M
Q2 24
$25.4M
$50.3M
Q1 24
$21.7M
$49.3M
Net Profit
ARQ
ARQ
NSSC
NSSC
Q4 25
$13.5M
Q3 25
$-653.0K
$12.2M
Q2 25
$-2.1M
$11.6M
Q1 25
$203.0K
$10.1M
Q4 24
$10.5M
Q3 24
$1.6M
$11.2M
Q2 24
$-2.0M
$13.5M
Q1 24
$-3.4M
$13.2M
Gross Margin
ARQ
ARQ
NSSC
NSSC
Q4 25
13.6%
58.6%
Q3 25
28.8%
56.6%
Q2 25
33.3%
52.8%
Q1 25
36.4%
57.2%
Q4 24
36.3%
57.0%
Q3 24
38.6%
55.9%
Q2 24
32.2%
55.3%
Q1 24
36.9%
53.8%
Operating Margin
ARQ
ARQ
NSSC
NSSC
Q4 25
-174.1%
30.6%
Q3 25
-2.4%
27.7%
Q2 25
-5.4%
23.8%
Q1 25
2.4%
25.4%
Q4 24
1.5%
26.0%
Q3 24
5.8%
26.9%
Q2 24
-5.6%
27.7%
Q1 24
-13.7%
29.4%
Net Margin
ARQ
ARQ
NSSC
NSSC
Q4 25
28.0%
Q3 25
-1.9%
24.7%
Q2 25
-7.5%
22.9%
Q1 25
0.7%
23.0%
Q4 24
24.4%
Q3 24
4.7%
25.4%
Q2 24
-7.7%
26.9%
Q1 24
-15.7%
26.8%
EPS (diluted)
ARQ
ARQ
NSSC
NSSC
Q4 25
$-1.20
$0.38
Q3 25
$-0.02
$0.34
Q2 25
$-0.05
$0.33
Q1 25
$0.00
$0.28
Q4 24
$-0.03
$0.28
Q3 24
$0.04
$0.30
Q2 24
$-0.06
$0.36
Q1 24
$-0.09
$0.36

Balance Sheet & Financial Strength

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

Metric
ARQ
ARQ
NSSC
NSSC
Cash + ST InvestmentsLiquidity on hand
$6.6M
$115.4M
Total DebtLower is stronger
$28.7M
Stockholders' EquityBook value
$168.0M
$184.8M
Total Assets
$230.6M
$212.8M
Debt / EquityLower = less leverage
0.17×

8-quarter trend — quarters aligned by calendar period.

Cash + ST Investments
ARQ
ARQ
NSSC
NSSC
Q4 25
$6.6M
$115.4M
Q3 25
$7.0M
$105.8M
Q2 25
$7.0M
$99.2M
Q1 25
$6.3M
$89.3M
Q4 24
$13.5M
$99.2M
Q3 24
$48.7M
$91.3M
Q2 24
$28.5M
$70.7M
Q1 24
$35.2M
$60.9M
Total Debt
ARQ
ARQ
NSSC
NSSC
Q4 25
$28.7M
Q3 25
$26.1M
Q2 25
$28.9M
Q1 25
$27.1M
Q4 24
$25.1M
Q3 24
$21.6M
Q2 24
$22.2M
Q1 24
$22.6M
Stockholders' Equity
ARQ
ARQ
NSSC
NSSC
Q4 25
$168.0M
$184.8M
Q3 25
$217.2M
$176.1M
Q2 25
$216.8M
$168.6M
Q1 25
$218.2M
$161.5M
Q4 24
$217.3M
$174.2M
Q3 24
$218.1M
$178.6M
Q2 24
$189.6M
$178.9M
Q1 24
$175.2M
$168.2M
Total Assets
ARQ
ARQ
NSSC
NSSC
Q4 25
$230.6M
$212.8M
Q3 25
$277.9M
$206.0M
Q2 25
$284.5M
$198.1M
Q1 25
$283.7M
$190.9M
Q4 24
$284.4M
$202.7M
Q3 24
$280.0M
$209.9M
Q2 24
$248.6M
$207.8M
Q1 24
$229.8M
$194.8M
Debt / Equity
ARQ
ARQ
NSSC
NSSC
Q4 25
0.17×
Q3 25
0.12×
Q2 25
0.13×
Q1 25
0.12×
Q4 24
0.12×
Q3 24
0.10×
Q2 24
0.12×
Q1 24
0.13×

Cash Flow & Capital Efficiency

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

Metric
ARQ
ARQ
NSSC
NSSC
Operating Cash FlowLast quarter
$-2.8M
$15.1M
Free Cash FlowOCF − Capex
$-3.5M
$14.5M
FCF MarginFCF / Revenue
-12.0%
30.1%
Capex IntensityCapex / Revenue
2.7%
1.2%
Cash ConversionOCF / Net Profit
1.12×
TTM Free Cash FlowTrailing 4 quarters
$-11.3M
$53.7M

8-quarter trend — quarters aligned by calendar period.

Operating Cash Flow
ARQ
ARQ
NSSC
NSSC
Q4 25
$-2.8M
$15.1M
Q3 25
$5.3M
$11.6M
Q2 25
$527.0K
$14.6M
Q1 25
$-5.8M
$13.4M
Q4 24
$5.2M
$13.5M
Q3 24
$7.7M
$12.0M
Q2 24
$-3.0M
$14.3M
Q1 24
$526.0K
$12.3M
Free Cash Flow
ARQ
ARQ
NSSC
NSSC
Q4 25
$-3.5M
$14.5M
Q3 25
$3.1M
$11.4M
Q2 25
$-1.4M
$14.4M
Q1 25
$-9.5M
$13.3M
Q4 24
$-37.8M
$12.4M
Q3 24
$-5.8M
$11.3M
Q2 24
$-22.1M
$13.8M
Q1 24
$-9.1M
$12.0M
FCF Margin
ARQ
ARQ
NSSC
NSSC
Q4 25
-12.0%
30.1%
Q3 25
8.8%
23.3%
Q2 25
-4.7%
28.4%
Q1 25
-34.9%
30.3%
Q4 24
-139.6%
28.8%
Q3 24
-16.5%
25.8%
Q2 24
-87.1%
27.4%
Q1 24
-41.7%
24.3%
Capex Intensity
ARQ
ARQ
NSSC
NSSC
Q4 25
2.7%
1.2%
Q3 25
6.3%
0.4%
Q2 25
6.6%
0.5%
Q1 25
13.6%
0.1%
Q4 24
158.9%
2.6%
Q3 24
38.7%
1.5%
Q2 24
75.5%
1.1%
Q1 24
44.1%
0.7%
Cash Conversion
ARQ
ARQ
NSSC
NSSC
Q4 25
1.12×
Q3 25
0.96×
Q2 25
1.26×
Q1 25
-28.59×
1.32×
Q4 24
1.29×
Q3 24
4.76×
1.08×
Q2 24
1.06×
Q1 24
0.94×

Financial Flow Comparison

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

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