Resolution criteria

• YES if Argonne National Laboratory’s “Light Duty Electric Drive Vehicles Monthly Sales Updates” reports U.S. light‑duty PHEV sales > 35,000 units for December 2025 (the PHEV line item in the December 2025 update PDF/webpage). NO if ≤ 35,000. (anl.gov)

• Use the latest Argonne figure available by 11:59 pm ET on March 31, 2026 (later revisions ignored).

• If Argonne does not publish a December 2025 PHEV figure by that date, resolve N/A.
  Sources to verify:
  https://www.anl.gov/esia/light-duty-electric-drive-vehicles-monthly-sales-updates
  Backup overview:
  https://www.anl.gov/ev-facts/model-sales (anl.gov)

Background

• Argonne tracks monthly U.S. sales of plug‑in vehicles (BEVs and PHEVs) and breaks out PHEVs explicitly; since Oct 2019, Argonne’s monthly E‑drive sales reference Wards Auto data. (anl.gov)

• Latest context: Argonne reports 19,716 PHEVs sold in June 2025 (out of 113,433 total plug‑ins). (anl.gov)

Considerations

• “PHEV” excludes conventional hybrids (HEVs) and BEVs; only new light‑duty vehicles count. (anl.gov)

• Argonne occasionally revises recent months; this market uses figures as of March 31, 2026 to avoid indefinite waiting.

• If Argonne migrates presentation (e.g., dashboard vs PDF) but still publishes a December 2025 PHEV number on the updates page, that number governs. (evdashboard.esia.anl.gov)