STRR Stock: Insider Activity, Filings & Research
Star Equity Holdings, Inc. (STRR) — Drillr’s hub for STRR insider activity, SEC filings, earnings signals and AI research. Over the trailing 3 months, STRR insiders filed 19 open-market buys and 4 sales (SEC Form 4).
STRR insider trading activity (SEC Form 4)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Jun 3, 2026 | Fruhbeis Todd Michaeldirector | Buy | 700 | $11.72 |
| Jun 2, 2026 | Parks Louis A.director | Buy | 1,000 | $11.60 |
| Jun 1, 2026 | Diamond Matthew Kofficer: Chief Accounting Officer | Tax | 763 | $11.62 |
| Jun 1, 2026 | Eberwein Jeffrey E.director, 10 percent owner, officer: Chief Executive Officer | Buy | 310 | $11.69 |
| Jun 1, 2026 | Eberwein Jeffrey E.director, 10 percent owner, officer: Chief Executive Officer | Buy | 3,663 | $11.61 |
| Jun 1, 2026 | Eberwein Jeffrey E.director, 10 percent owner, officer: Chief Executive Officer | Buy | 11,201 | $11.81 |
| Jun 1, 2026 | Eberwein Jeffrey E.director, 10 percent owner, officer: Chief Executive Officer | Buy | 1,482 | $11.59 |
| May 28, 2026 | Fruhbeis Todd Michaeldirector | Grant | 5,504 | — |
| May 28, 2026 | Pearse Robert G.director | Grant | 5,504 | — |
| May 28, 2026 | Nelson Connia Mdirector | Grant | 5,504 | — |
| May 28, 2026 | Drake Mimi Kdirector | Grant | 5,504 | — |
| May 28, 2026 | Parks Louis A.director | Grant | 5,504 | — |
| May 28, 2026 | Palmer Jenniferdirector | Grant | 5,504 | — |
| May 27, 2026 | Eberwein Jeffrey E.director, 10 percent owner, officer: Chief Executive Officer | Buy | 694 | $11.06 |
| May 27, 2026 | Eberwein Jeffrey E.director, 10 percent owner, officer: Chief Executive Officer | Buy | 2,288 | $11.76 |
Source: STRR SEC Form 4 filings, latest Jun 3, 2026. For informational purposes only — not investment advice.
Star Equity Holdings, Inc. company profile
Overview
Star Equity Holdings, Inc. (NASDAQ:STRR) is a diversified holding company founded in 1985 and headquartered in Old Greenwich, Connecticut. Originally established as Digirad Corporation, the company changed its name to Star Equity Holdings in December 2020 to better reflect its evolution from a medical device company into a multi-segment investment holding company. The company has undergone significant transformation over the past few years, divesting its legacy healthcare assets and pivoting toward building solutions, energy services, and strategic investments across various industries.
Business
Star Equity Holdings operates as a diversified holding company with three primary business segments that generate revenue through distinct market channels. The Building Solutions division represents the company's largest revenue generator, accounting for approximately 85-90% of total revenues based on recent financial performance. This segment operates through several subsidiaries including Glenbrook Building Supply, EdgeBuilder, KBS (modular construction), and the recently acquired Timber Technologies. The division manufactures and distributes engineered wood products, modular housing units, structural wall panels, and permanent wood foundation systems. Factory-built construction, which this division specializes in, represents a growing segment of the construction industry that has expanded from traditional mobile homes to sophisticated modular buildings for workforce housing, affordable housing, educational dormitories, and environmentally sustainable construction projects. The division also operates as a building materials distributor, supplying general contractors with lumber and other construction materials. The Energy Services division is the company's newest segment, established in 2024 through the acquisition of Alliance Drilling Tools (ADT). This division provides specialized equipment rental services to the oil and gas drilling industry, offering mission-critical, project-based equipment that typically can be used 5-10 times before requiring replacement. The energy services sector operates on high-margin, project-based contracts where equipment downtime can be extremely costly for drilling operations, making reliable equipment suppliers essential partners. The Investments division manages the company's portfolio of public equity securities and strategic investments, including a 20% stake in Enservco (an energy services and transportation company) and various other equity holdings. This segment represented approximately $3.1 million in assets as of Q1 2025, down from $3.4 million at the end of 2024.
Revenue model
Star Equity Holdings generates revenue through multiple business models across its diversified portfolio. The Building Solutions division operates primarily on a product sales model, manufacturing and selling modular housing units, engineered wood products, and building materials to general contractors, developers, and construction companies. Revenue is recognized upon delivery of completed projects, which can range from individual housing units to large commercial developments worth several million dollars. The division also operates building supply distribution centers that generate revenue through wholesale margins on lumber and construction materials. The Energy Services division operates on an equipment rental and service fee model, providing specialized drilling equipment to oil and gas companies on a project basis. This segment generates high-margin revenue through short-term equipment rentals where customers pay premium rates for mission-critical equipment that prevents costly drilling downtime. The Investments division generates returns through capital appreciation and dividend income from its portfolio of public and private equity investments. This includes both passive investments in publicly traded securities and strategic investments like the Enservco stake, where Star Equity holds board representation. Several factors significantly impact the company's margins and profitability. In Building Solutions, lumber price volatility represents a major input cost risk, though the company has implemented contract mechanisms to hedge and pass through price changes to customers. Interest rate sensitivity affects customer financing availability, as evidenced by project delays during periods of credit tightening in 2023-2024. The company benefits from economies of scale as higher revenue volumes allow fixed costs to be spread across a broader base, improving gross margins. Seasonal construction patterns and permitting delays can cause revenue timing fluctuations, while the shift toward factory-built construction (now representing 6% of new construction starts, up from historical levels) provides a secular tailwind for the Building Solutions division.
Competitive moat
Star Equity Holdings operates in competitive markets with limited sustainable moats across its business segments. The Building Solutions division benefits from some operational advantages including established customer relationships, manufacturing capabilities, and regional market presence, but faces significant competition from other modular construction companies and traditional building methods. The company's focus on niche markets like workforce housing and educational dormitories provides some differentiation, but these advantages are not insurmountable barriers to entry. The Energy Services division through Alliance Drilling Tools may possess a stronger competitive position due to the mission-critical nature of drilling equipment where reliability and availability often outweigh price considerations. The specialized nature of drilling equipment and the high cost of downtime can create customer stickiness, though this advantage is limited by the cyclical nature of the energy sector and the presence of other equipment rental companies. The company's most significant competitive challenge is its small scale relative to larger competitors in each segment. With a market capitalization under $7 million, Star Equity lacks the financial resources to compete aggressively on pricing or invest heavily in new technologies. The company's diversified structure, while providing some risk mitigation, also prevents it from achieving dominant positions in any single market. Potential disruption could come from larger construction companies integrating modular capabilities in-house, new technologies in construction methods, or consolidation in the energy services sector. The company's investment-focused approach and willingness to divest underperforming assets provides some strategic flexibility, but the lack of strong competitive moats makes the business vulnerable to economic downturns and competitive pressures.
Risks & safety
Star Equity Holdings presents a mixed margin of safety profile with both concerning and positive financial indicators. **Cash Position and Liquidity:** - Cash and short-term investments: $1.9 million (Q1 2025), down from $4.0 million at year-end 2024 - Current ratio: 1.42, indicating adequate short-term liquidity - Quick ratio: 0.88, suggesting potential working capital pressure - Free cash flow: $200,000 positive in Q1 2025, improved from negative $8.0 million in FY 2024 **Debt and Solvency:** - Total debt: Approximately $11-12 million based on recent financials - Debt-to-equity ratio: 0.37, representing moderate leverage - Recent financing: $3.6 million credit facilities for Alliance Drilling Tools acquisition - Interest coverage appears manageable given recent EBITDA improvements **Valuation Metrics:** - Price-to-book ratio: 0.12, suggesting potential asset value - Enterprise value appears reasonable relative to revenue base - Market cap of $6.8 million represents significant discount to book value - Graham Net-Net: Negative, indicating stock trades below liquidation value **Other Considerations:** - Volatile earnings with recent losses but improving operational trends - Strong backlog of $27.9 million provides near-term revenue visibility - Asset base of $94.8 million significantly exceeds market capitalization
Recent development
Star Equity Holdings has undergone dramatic strategic transformation over the past several years, evolving from a healthcare-focused company into a diversified holding company. The most significant pivot occurred with the divestiture of the legacy Digirad healthcare business, which provided substantial cash proceeds that enabled the company's acquisition strategy. The company has aggressively pursued acquisitions in the building solutions sector, acquiring Big Lake Lumber in Q4 2023, Timber Technologies in Q2 2024, and most recently Alliance Drilling Tools in March 2025. These acquisitions have transformed the Building Solutions division from a small modular construction operation into a more comprehensive building products and services company with expanded geographic reach and product offerings. The establishment of the Energy Services division through the Alliance Drilling Tools acquisition represents a strategic diversification into the oil and gas sector, marking the company's entry into equipment rental services for drilling operations. This move aligns with management's strategy to build a diversified portfolio of businesses with different cyclical patterns. Recent operational improvements include achieving record backlog levels of $27.9 million in Q1 2025, up from $14.8 million in the prior year, indicating strong demand recovery after the credit-tightening challenges of 2023. The company has also implemented sale-leaseback transactions to optimize its real estate portfolio and improve capital efficiency. Management has indicated openness to strategic alternatives including potential sale of the company, stating that "all options are on the table to maximize shareholder value" given the significant discount between the stock price and management's assessment of intrinsic value.
STRR company profile · for informational purposes only — not investment advice.
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