DPH Holdings Corporation (also styled DPH Holdings Corp., "DPHH") is the reorganized successor to Delphi Corporation, spun off from General Motors in 1999 and once one of the world's largest automotive parts suppliers. After Delphi's October 2005 Chapter 11 filing (Bankruptcy Court, S.D.N.Y.), its operating businesses were sold on the plan's October 6, 2009 effective date to Delphi Automotive LLP (later Delphi Automotive PLC, now Aptiv) and GM; the old Delaware-incorporated parent was renamed DPH Holdings Corporation. It is not publicly traded — its sole stockholder is the Post-Confirmation Reorganized DPH Holdings Share Trust, with the GM and DIP buyer groups as residual beneficiaries. The pre-bankruptcy NYSE common stock (ticker DPH) was cancelled with no distribution to holders. DPH has no ongoing operations; its registered office is in Wilmington, Delaware, and state records list it as inactive.
Historically Delphi designed and manufactured steering, braking, chassis, powertrain, thermal, and electrical/electronic-architecture (Packard Electric) components, plus occupant-sensing airbag electronics including its Passive Occupant Detection System (PODS). DPH Holdings itself is a liquidating shell holding only residual assets and legacy liabilities such as environmental cleanup obligations.
Litigation posture: defendant only — one tracked case, zero as plaintiff — consistent with an operating company (or its wind-down successor) being attacked rather than an NPE asserting a portfolio. Automotive Technologies International, Inc. v. Delphi Corporation et al., 2:08-cv-11048 (E.D. Mich., filed March 11, 2008; closed March 9, 2011), named 13 defendants and four patents-in-suit. ATI, founded by inventor David S. Breed, is an individual-inventor-started patent asserter per the Stanford NPE Litigation Database; it later assigned automotive-safety patents to Acacia Research's American Vehicular Sciences subsidiary.
ATI initially sued Delphi's OEM customers (GM, Ford, Mercedes-Benz, Volvo, Hyundai and others) in the Northern District of Texas; Delphi's declaratory-judgment action in the Eastern District of Michigan was consolidated with it. In March 2011 the court granted four defense summary-judgment motions, holding the asserted patents invalid as anticipated and one obvious. DPH also litigated non-patent matters, notably a $23.1 million environmental cleanup settlement approved in 2013.
Sources: Delphi/Aptiv SEC filings; SEC no-action letter on DPH Holdings (2009); DOJ/EPA settlement releases (2013); E.D. Mich. and Federal Circuit opinions; RPX Insight; Stanford NPE Litigation Database; Delaware corporate registry.