Private investment firm Washington Harbour Partners has acquired SIXGEN Incorporated, a cyber solutions company for the US national security, intelligence, and defence communities, and critical commercial industries.

BV Investment Partners, a middle-market private equity firm focused on the tech-enabled business services, software and IT services sectors, has invested in CallTower, a specialist in cloud-based enterprise-class communications, contact centre and collaboration solutions.

Private equity firm Arctos Partners has acquired a minority stake in AMR Holdings GP Ltd, the owner of the Aston Martin F1 team, in a deal that values the business at $1bn, according to a report by The Financial Times.

Middle-market private equity firm Gemspring Capital has acquired Fenceworks, a fencing installer and distributor serving the some of the largest homebuilders in the US, as well as general contractors and local fencing providers.

Private investment firm Ardian is to sell its stake in imes-icore Holding, a provider of milling and grinding machines for the automated production of dental prosthetics, to EMZ Partners, a European PE firm focused on small- to medium-sized businesses.

Granite Creek Capital Partners, a private investment firm based in Chicago, has acquired NYP Corp, a New Jersey-based value-added packaging manufacturer and distributor focused on the wholesale nursery, agricultural, and industrial markets.

Jolt Capital, an independent private equity firm specialising in growth investments in European deeptech companies, is to make a €24m investment in BioSerenity, a specialist in connected medical devices and innovative medical services in electrophysiology.