The United States market has experienced a robust climb, advancing 5.5% in the last week and rising 21% over the past year, with earnings projected to grow by 17% annually. In this dynamic environment, identifying small-cap stocks that are perceived as undervalued and show insider buying can offer intriguing opportunities for investors seeking potential growth.

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

Name	PE	PS	Discount to Fair Value	Value Rating
Chain Bridge Bancorp	11.7x	4.8x	49.79%	★★★★★☆
Kingstone Companies	9.5x	1.3x	34.90%	★★★★☆☆
Angel Oak Mortgage REIT	11.1x	5.7x	20.88%	★★★★☆☆
Onterris	184.8x	1.0x	22.64%	★★★★☆☆
Auburn National Bancorporation	10.9x	2.7x	11.83%	★★★☆☆☆
Bank of Marin Bancorp	NA	7.7x	27.43%	★★★☆☆☆
Bank of the James Financial Group	10.7x	2.4x	28.31%	★★★☆☆☆
Union Bankshares	9.1x	1.9x	14.98%	★★★☆☆☆
Orion Group Holdings	116.1x	0.5x	41.76%	★★★☆☆☆
Via Transportation	NA	3.7x	48.42%	★★★☆☆☆

Let's dive into some prime choices out of from the screener.

Gibraltar Industries (ROCK)

Simply Wall St Value Rating: ★★★☆☆☆

Overview: Gibraltar Industries is a manufacturer and provider of products and services for the renewable energy, residential, agtech, and infrastructure markets with a market cap of approximately $1.76 billion.

Operations: ROCK generates revenue primarily through its sales, with a notable gross profit margin reaching 29.46% as of September 2024. The company's cost structure is heavily influenced by the cost of goods sold (COGS) and operating expenses, which have consistently impacted its net income over time.

PE: 26.9x

Gibraltar Industries, a company with a focus on building products, has seen insider confidence through share purchases by their CEO, who acquired 19,735 shares valued at approximately US$739K. Despite recent challenges in earnings—second-quarter net income dropped to US$8.19 million from last year's US$26 million—the company maintains robust sales growth with second-quarter sales reaching US$509.55 million compared to US$309.52 million previously. They project annual sales between $1.76 billion and $1.83 billion for 2026, indicating potential resilience amid market fluctuations and highlighting the company's ongoing efforts to navigate financial hurdles while aiming for profitability improvements in the future.

Centerspace (CSR)

Simply Wall St Value Rating: ★★★☆☆☆

Overview: Centerspace is a real estate investment trust focused on owning, managing, and developing multifamily apartment communities with a market cap of approximately $1.12 billion.

Operations: The primary revenue stream originates from the Multifamily segment, contributing $257.45 million. The company's gross profit margin has shown a notable trend, reaching 59.31% in recent periods.

PE: 44.7x

Centerspace, a multifamily real estate company, is navigating its small-cap status with strategic maneuvers aimed at enhancing shareholder value. Despite a net loss of US$0.96 million in Q2 2026, down from US$14.36 million the previous year, they project an annual net income per share between US$6.42 and US$6.82 for 2026. Recent insider confidence was evident as the company repurchased 45,310 shares from April to June 2026 for US$2.52 million under its buyback plan initiated in August 2025. Their portfolio optimization and deleveraging strategy involves selling approximately $240-$245 million in assets by year's end to strengthen their balance sheet amidst high-risk funding challenges due to external borrowing reliance while aiming for long-term success as market fundamentals recover post-oversupply period (2023-2025).

Orion Group Holdings (ORN)

Simply Wall St Value Rating: ★★★☆☆☆

Overview: Orion Group Holdings is a construction company specializing in marine and concrete services, with a market cap of approximately $0.19 billion.

Operations: Orion Group Holdings generates revenue primarily from its Marine and Concrete segments, with Marine contributing $523.34 million and Concrete $373.16 million. The company's gross profit margin has shown significant fluctuations, reaching 13.02% in September 2025 before slightly decreasing to 11.78% by June 2026. Operating expenses are a notable factor, consistently impacting net income across the periods analyzed.

PE: 116.1x

Orion Group Holdings, a smaller U.S. company, has recently caught attention with insider confidence shown through share purchases in the past year. Despite being removed from several indices in June 2026, Orion's revenue for the second quarter rose to US$221.88 million from US$205.29 million year-over-year, although it posted a net loss of US$4.15 million compared to last year's profit. The company anticipates annual revenue between US$900 million and US$950 million by the end of 2026, reflecting potential growth despite current challenges like low profit margins and reliance on external borrowing for funding.

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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.