Shares of Warby Parker vaulted 18.6% to $25.25 Thursday morning after the eyewear retailer delivered third-quarter profitability that cleared Wall Street's bar — even as top-line growth and customer acquisition showed signs of cooling. The question now: whether squeezing more dollars from existing buyers is a sustainable path or a signal that the brand's growth engine is downshifting.

• The Profit Numbers Were the Star of the Show

Warby Parker generated net income of $5.6 million and adjusted EBITDA — a measure of operating profit before accounting charges — of $28.6 million.

That EBITDA figure rose $2.8 million year-over-year, pushing the margin up to 11.7%.

Full-year EBITDA guidance of $118 million at the midpoint landed above analysts' consensus of $115.8 million , giving investors confidence management can hold the profit line even as it spends heavily on new stores and its upcoming smart-glasses product.

• Revenue Came in Slightly Light, and Customers Are Harder to Win

EPS of $0.04 missed the analyst estimate of $0.09, and revenue of $244.7 million fell short of the $246.8 million consensus. More concerning: active customer growth slowed to 3.0%, reaching 2.74 million — down from 4.8% growth in Q1 and 4.1% in Q2. The company is compensating by extracting more per buyer: average revenue per customer rose 6.7% to $342 , driven by pricier progressive lenses and insurance-covered exams.

• Tariff Relief and Lens Mix Are Quietly Boosting Margins

Gross margin expanded to 54.4% from 54.1% a year ago, helped by reduced tariffs, shipping savings, optical lab efficiencies, and rising sales of premium lens add-ons. That margin resilience matters because adjusted overhead costs climbed to 49.4% of revenue from 48.7% , meaning profitability improvement is coming almost entirely from making glasses more cheaply, not from operating leverage.

• Smart Glasses Launch Is the Next Big Bet — and the Next Big Cost

Pre-orders for Warby Parker's first smart-glasses line open November 12 , and the company is planning a "significant increase in marketing spend in Q4" to support the launch. Free cash flow was already negative $2.0 million this quarter partly due to those investments, with $288 million in cash providing a cushion. If the smart-glasses bet pays off, it could reignite customer growth; if not, shareholders are funding an expensive experiment while the core eyewear business matures.