Graham Holdings is an education and media company, whose operations include educational services; television broadcasting; online, print and local TV news; home health and hospice care; and manufacturing. The company's subsidiary, Kaplan, Inc. provides educational services, both domestically and outside the United States. The company's media operations comprise of the ownership and operation of television broadcasting, plus Slate and Foreign Policy magazines; Megaphone, a provider of podcast technology for publishers and advertisers; and Pinna, an ad-free audio streaming service for children. The company also owns, among others, home health and hospice providers, industrial companies, and automotive dealerships.

Pulse Biosciences is a bioelectric medicine company. The company is pursuing regulatory clearance to market CellFX? System (CellFX). The CellFX System utilizes its Nano-Pulse Stimulation? (NPS) technology to treat various applications for which an optimal solution remains unfulfilled. NPS is a proprietary technology that delivers nanosecond duration pulses of high amplitude electrical energy to non-thermally clear targeted cells while sparing adjacent non-cellular tissue. The company's CellFX System allows for the adjustment of four key treatment parameters: pulse duration, pulse amplitude, pulse frequency, and the number of pulses, depending on the target tissue, application and desired treatment outcome.

SecureWorks is a holding company. Through its subsidiaries, the company provides information security solutions focused on protecting its customers from cyber attacks. The company's integrated suite of solutions include: managed security, through which it provides its customers global visibility and insight into malicious activity enabling them to detect and remediate threats; and security and risk consulting, through which it advises its customers on a variety of security and risk-related matters. The company's proprietary Counter Threat Platform collects, aggregates, correlates and analyzes daily events from its customer base and uses algorithms to detect malicious activity and deliver security countermeasures.

Vertex Energy is an environmental services company that recycles industrial waste streams and off-specification commercial chemical products. The company has three segments: Black Oil, which collects and purchases used motor oil directly from third-party generators, aggregates used motor oil, and sells used motor oil to its customers for use as a feedstock or replacement fuel for industrial burners; Refining and Marketing, which aggregates and manages the re-refinement of used motor oil and other petroleum by-products and sells the re-refined products to end customers; and Recovery, which includes a generator solutions company for the proper recovery and management of hydrocarbon streams.