Top 10 Security & Protection Services Stocks
Marvin's rules rank 10 Security & Protection Services stocks, led by Brady Corporation, Napco Security Technologies and MSA Safety. Scores compare each company with others in its industry as of November 2026.
This list covers 10 companies in the Security & Protection Services industry, ranked by Marvin's Overall score. The industry is broad. It groups together companies with quite different business models, so their financial figures vary a lot.
Each pick below shows a few figures: growth, profit margins, return on equity and debt. These help show how a company is run, but they are only a snapshot of the last fiscal year. A missing figure means the data was not available for that company.
Keep in mind that Marvin's scores only compare a company with others in its industry today. A high score is not a prediction, and a lower-ranked company can still have strengths in some areas.
The list
How Marvin ranked these stocks
Marvin includes companies above a minimum size threshold and ranks them by Overall score, highest first, within the Security & Protection Services industry. Scores are relative to each company's own industry, so they show how a company compares with its industry peers, not with every stock in the market. The data is as of November 2026.
Companies above about $300 million in size, ranked by Marvin scores (0-100, relative to each company's own industry). The Security & Protection Services industry, highest Overall score first.
The stocks, one by one
Brady Corporation BRC
Brady Corporation has the top Overall score, 93, helped by a quality score of 87. An operating margin of 15.9% and debt-to-equity of 0.06 suggest solid profitability with very little debt. Caution: its opportunity score of 64 is lower than its quality score.
Napco Security Technologies, Inc. NSSC
Napco Security Technologies has a quality score of 94, with an operating margin of 22.6% and a free cash flow margin of 29.3%. Those suggest strong profits and cash generation. Caution: its opportunity score is only 28, and no debt-to-equity figure is available.
MSA Safety Incorporated MSA
MSA Safety shows an operating margin of 21.2% and a return on equity of 22.4%, pointing to healthy profitability. Debt-to-equity of 0.46 looks moderate. Caution: revenue growth of 3.7% last fiscal year was fairly modest.
ADT Inc. ADT
ADT has a strong operating margin of 25.0% and a free cash flow margin of 38.1%, and its opportunity score is 78. Caution: debt-to-equity of 2.28 is high compared with most names on this list, and gross margin is not available.
CoreCivic, Inc. CXW
CoreCivic grew revenue by 12.7% last fiscal year, one of the faster rates on this list, with a return on equity of 8.9%. Caution: its free cash flow margin of 2.4% is thin, and operating margin is not available.
The GEO Group, Inc. GEO
The GEO Group has a high opportunity score of 93 but a quality score of just 42. Its operating margin is 11.2% and its return on equity is 19.2%. Caution: the free cash flow margin of 0.9% is very thin.
The Brink's Company BCO
The Brink's Company posts a return on equity of 58.3% and an operating margin of 10.5%, with growth of 5.0%. Caution: debt-to-equity of 14.67 is very high, which can inflate return on equity, and free cash flow margin is not available.
Mistras Group, Inc. MG
Mistras Group has an operating margin of 6.9% and a free cash flow margin of 3.9%, both on the low side. Caution: revenue changed by -0.8% last fiscal year, meaning slight shrinkage, so growth is a weak spot.
NLI Holdings, Inc. NL
NLI Holdings grew revenue by 8.5% and has an opportunity score of 86, but its quality score is only 27. Caution: return on equity is -7.0%, a negative figure, and no debt-to-equity figure is available.
Evolv Technologies Holdings, Inc. EVLV
Evolv Technologies grew revenue by 40.5%, the fastest on this list, with a gross margin of 49.9%. Caution: its operating margin of -20.8% and return on equity of -4.4% are negative, and free cash flow margin is not available.
Common questions
What does Marvin's Overall score mean?
It is a summary score that shows how a company compares with others in its own industry today. It is not a forecast and not a recommendation. The quality and opportunity scores give more detail behind it.
Why do some stocks have a high opportunity score but a low Overall score?
The Overall score blends several factors. A company can score well on opportunity yet rank lower overall if its quality score is weak. GEO and NL on this list are examples of that pattern.
Is a high return on equity always a good sign?
Not always. Return on equity can look large when a company has a lot of debt and little shareholder equity. It helps to read it alongside the debt-to-equity ratio, as with The Brink's Company here.
Keep reading
- Top 15 Small-Cap Industrials Stocks by Marvin Score
- Top 15 Industrials Stocks With Low Debt
- Top 15 Industrials Stocks Ranked by Marvin Scores
- Top 20 Good Stocks With the Least Debt
Free account. Build your own AI-made watchlists, follow Marvin's scores and share lists.
Create a free account
Marvin's scores (0-100) compare each company with others in its industry today. Growth and margin figures come from SEC filings. This is general information, not personal investment advice or a recommendation to buy or sell anything. Do your own research.