Undervalued Small Caps With Insider Buying To Watch Globally In September 2026

In the last week, the United States market has been flat, yet it has shown a robust 12% increase over the past year with earnings projected to grow by 17% annually. In this context, identifying small-cap stocks that are potentially undervalued and exhibit insider buying can be an intriguing strategy for investors seeking opportunities in a dynamic market environment.

Top 10 Undervalued Small Caps With Insider Buying In The United States

Name	PE	PS	Discount to Fair Value	Value Rating
Cardinal Infrastructure Group	NA	1.0x	36.11%	★★★★★★
Surgery Partners	NA	0.5x	27.75%	★★★★★★
Financial Institutions	9.9x	3.3x	21.71%	★★★★★☆
Enovis	NA	0.5x	44.82%	★★★★★☆
Bank of the James Financial Group	10.8x	2.4x	27.29%	★★★★☆☆
Union Bankshares	9.8x	2.1x	44.97%	★★★★☆☆
Shore Bancshares	11.7x	3.4x	36.34%	★★★★☆☆
New Peoples Bankshares	9.5x	2.6x	10.72%	★★★☆☆☆
Hanover Bancorp	20.3x	2.8x	35.57%	★★★☆☆☆
Orion Group Holdings	101.7x	0.4x	45.72%	★★★☆☆☆

Click here to see the full list of 67 stocks from our Undervalued US Small Caps With Insider Buying screener.

We'll examine a selection from our screener results.

Oak Valley Bancorp (OVLY)

Simply Wall St Value Rating: ★★★☆☆☆

Overview: Oak Valley Bancorp operates as a bank holding company providing commercial banking services, with a market cap of $0.21 billion.

Operations: Oak Valley Bancorp generates revenue primarily through its banking operations, with a recent quarterly revenue of $83.07 million. The company consistently achieves a gross profit margin of 100%, indicating no cost of goods sold is reported in the financial data provided. Operating expenses, including general and administrative costs, are significant components impacting net income margins which have shown variability across periods, with the latest being 28.23%.

PE: 12.2x

Oak Valley Bancorp, a smaller player in the banking sector, recently reported net interest income of US$18.94 million for Q2 2026, up from US$18.15 million the previous year. However, net income dipped to US$5.11 million from US$5.59 million. Insider confidence is evident as Gary Strong purchased 2,000 shares valued at US$65,000 in September 2026, reflecting a significant 16% increase in their holdings. The firm declared a semi-annual dividend of US$0.375 per share payable on August 14, 2026.

• Click here and access our complete valuation analysis report to understand the dynamics of Oak Valley Bancorp.

• Evaluate Oak Valley Bancorp's historical performance by accessing our past performance report.

SNDL (SNDL)

Simply Wall St Value Rating: ★★★☆☆☆

Overview: SNDL is a company engaged in liquor retail, cannabis retail, and cannabis operations, with a market capitalization of CA$1.22 billion.

Operations: SNDL generates revenue primarily from liquor retail, cannabis retail, and cannabis operations. The company has shown a gross profit margin of 26.24% as of the latest period, reflecting its ability to manage costs relative to sales.

PE: -22.0x

SNDL, a smaller player in the U.S. market, is actively seeking strategic investments and acquisitions to enhance its competitive edge, particularly in Florida and Texas. Despite reporting a net loss of CAD 7.82 million for Q2 2026, insider confidence is evident as J. Mills purchased 50,000 shares worth US$69,700 in August 2026. The company recently completed a significant share buyback of over 16 million shares for CAD 32.73 million since November 2025, indicating commitment to shareholder value amidst ongoing challenges with profitability forecasts remaining bleak for the next three years due to reliance on external borrowing sources.

• Take a closer look at SNDL's potential here in our valuation report.

• Learn about SNDL's historical performance.

Bank of Marin Bancorp (BMRC)

Simply Wall St Value Rating: ★★★★☆☆

Overview: Bank of Marin Bancorp operates as a community banking institution, providing financial services primarily through its network of branches in California, with a market capitalization of approximately $0.3 billion.

Operations: The company generates revenue primarily through community banking, with a recent revenue figure of $60.42 million. Operating expenses have consistently exceeded revenues in recent periods, leading to negative net income margins such as -23.60%. Net income has fluctuated significantly over time, reaching a low of -$35.68 million in late 2025 and showing some recovery thereafter.

PE: -31.7x

Bank of Marin Bancorp, a smaller player in the banking sector, recently joined the S&P Regional Banks Select Industry Index, signaling increased recognition. Their Q2 2026 results showed net interest income jumping to US$30.78 million from US$24.97 million year-on-year, with net income turning positive at US$9.25 million from a loss previously. Insider confidence is evident with recent share purchases by insiders, suggesting optimism about future growth prospects as earnings are projected to grow significantly annually.

• Click to explore a detailed breakdown of our findings in Bank of Marin Bancorp's valuation report.

• Understand Bank of Marin Bancorp's track record by examining our Past report.

Taking Advantage

• Reveal the 67 hidden gems among our Undervalued US Small Caps With Insider Buying screener with a single click here.
• Invested in any of these stocks? Simplify your portfolio management with Simply Wall St and stay ahead with our alerts for any critical updates on your stocks.
• Invest smarter with the free Simply Wall St app providing detailed insights into every stock market around the globe.

Want To Explore Some Alternatives?

• Explore high-performing small cap companies that haven't yet garnered significant analyst attention.
• Fuel your portfolio with companies showing strong growth potential, backed by optimistic outlooks both from analysts and management.
• Find companies with promising cash flow potential yet trading below their fair value.

This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.

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