Tesla reclaimed the global quarterly battery-electric-vehicle lead in Q1 2026 with 358,023 deliveries, up 6.3% year over year, edging BYD's 310,389 pure-EV units — a 25% drop for the Shenzhen automaker from Q1 2025. [1] In China specifically, Tesla slipped to fourth place with a 6.6% market share and 56,107 units, behind BYD (22.8%), Geely (11.4%), and Changan (8%). [2] BYD's overall new-energy-vehicle sales, which include plug-in hybrids, totaled 700,463 units in Q1 — roughly double Tesla's output when hybrids are counted. [1]

The headline is a crown-reclamation; the underlying numbers compress the frame. Tesla's 358,023 deliveries missed Wall Street consensus of 365,645 by 7,600 units, and the stock fell more than 5% on the report — its steepest single-day drop of the year. [3] BYD's Q1 BEV split ran 83,249 units in January, 79,539 in February, and a 147,601 surge in March that narrowed the quarter-end gap. [2] March BYD overseas shipments hit 120,083 units — 40% of monthly volume now export — up 65% year over year even as domestic share compressed from 27% to 17% on price-war pressure and subsidy expiration. [2]

The Tesla Q1 print lands hours before Wednesday's earnings call. Full-year 2025 told the structural story: BYD delivered 2,254,714 BEVs to Tesla's 1,636,129 — a 600,000-unit gap too wide for quarterly seasonality to close. Q1 is the quarter BYD always loses on Chinese New Year timing. What matters for 2026 is whether BYD's 65% overseas-shipment growth holds through the summer's tariff turns.

-- DAVID CHEN, Beijing