LGL Group Inc (NYSE American: LGL) is a Delaware-incorporated holding company engaged in manufacturing, services, and merchant investment activities. It generates revenue primarily through its Electronic Instruments segment, where subsidiary PTF designs, manufactures, and markets time and frequency reference instruments used for timing and synchronization across communications, networking, aerospace, defense, instrumentation, and industrial markets. LGL acquired PTF in September 2016. The company also holds a Merchant Investment business that, as of December 31, 2025, held investments with a fair value of $25,655 (in thousands) classified within cash and cash equivalents and marketable securities. Customer concentration is material: in FY2025, the three largest customers accounted for 18.5%, 16.1%, and 10.3% of net sales, respectively. International revenues were $897 (36.6% of total net sales) in FY2025, derived primarily from customers in Europe and Asia. The company is headquartered in Orlando, Florida, was incorporated in 1928, and has completed 32 acquisitions and 3 spin-offs since 1985, including the spin-off of M-tron Industries, Inc. in October 2022.

Revenue model

Transactional product sales of time and frequency instruments and ancillary products (distribution amplifiers, redundancy auto switches) through direct sales representatives, international distributors, and OEM relationships. A secondary revenue stream comes from the Merchant Investment business, which holds marketable equity securities reported at fair value under ASC 321.

Products and services

PTF-branded time and frequency reference standards, distribution amplifiers (covering HF, RF, digital, time code, optical, and custom signal types, with 12 to 36 output channel configurations), and redundancy auto switches with Ethernet connectivity and SNMP integration. Custom-configured units are designed directly with OEM customers.

Customers and end markets

OEM systems integrators and end users in computer networking, satellite ground stations, electric utilities, broadcasting, telecommunication systems, aerospace, defense, and metrology. In FY2025, the top three customers represented 18.5%, 16.1%, and 10.3% of net sales. Customer concentration is high and expected to continue.

Value-chain role

Vertically integrated designer and manufacturer of precision frequency and timing instruments sold directly to OEMs and through international distributors. PTF operates from a single manufacturing facility and uses outsourced independent contractors for marketing support.

Geographic exposure

Primarily United States-based operations with international sales representing $897 (36.6% of total net sales) in FY2025, down from $962 (43.2%) in FY2024, derived primarily from customers in Europe and Asia. International transactions are settled in U.S. dollars to limit currency exchange risk.

Source: SEC 10-K, filed 2026-03-30

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