Plus500 Shares Tumble on Shrinking Margins and Guidance Downgrade

Shares in Plus500 (LSE:PLUS) plunged on Monday after the financial technology firm released a first-half trading update that revealed contracting profit margins and a downgrade to its full-year earnings guidance, prompting a sharp investor sell-off.

H1 Results Disappoint

Plus500 reported that for the first half of 2026, revenue grew 12% year-over-year to $462.9 million, a three-year high for the period. However, underlying EBITDA (earnings before interest, taxes, depreciation, and amortization) rose by only 1% to $187.5 million.

This discrepancy was driven by a significant contraction in the company's underlying EBITDA margin, which fell to 41% from 45% in the same period last year. According to the update, the lower profitability was a result of increased spending on customer acquisition and investment in its U.S. business expansion.

Guidance Cut Signals Weaker Outlook

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The most significant catalyst for the stock's decline was a revision to the company's full-year forecast. In an April update, Plus500 had guided that full-year revenue and EBITDA would come in *ahead* of market consensus. The company has now revised that, stating it expects to be merely *in line* with consensus estimates.

Investors interpreted this change as a material downgrade, suggesting a more challenging operating environment in the second half of the year. This view was reinforced by data showing that new customer additions in the second quarter fell below the level seen in Q2 of the previous year, indicating a slowdown from the strong momentum in Q1.

Market Reaction

The market reacted swiftly to the news, with Plus500 shares dropping as much as 11.1% during the session to a low of 4,263.96 pence. The sell-off represents a significant pullback from the stock's 52-week high of 5,185p. The negative sentiment was compounded by a broader risk-off tone in UK equities, which offered little support for the company-specific pressures.