Investing.com -- Shares of Signet Jewelers surged about 9% in premarket trading Wednesday after the company posted second-quarter earnings well above expectations and raised its full-year profit outlook. The jewelry retailer reported adjusted earnings per share of $2.19, topping the analyst estimate of $1.72, while revenue of $1.5 billion came in broadly in line with the $1.53 billion consensus.

Same-store sales rose 2.2% in the quarter, while merchandise average unit retail increased about 6%, with growth in both bridal and fashion categories. Adjusted operating margin expanded to 7% from 5.6% a year earlier.

"We delivered another quarter of comp sales growth with a positive comp performance in all fine jewelry brands. This includes high single-digit unit growth at higher price points," said J.K. Symancyk, CEO of Signet Jewelers.

"Building on this momentum, we are accelerating our key brand initiatives, including merchandise refreshes, enhancements to both the online and in-store customer experience, and a more modern and emotionally engaging marketing approach. By leveraging the full strength of our diversified portfolio, we are entering the back half of the year well-positioned to deliver compelling value throughout the holiday season for customers across a broad range of income levels."

For fiscal 2027, Signet now expects adjusted earnings per share of $10.45 to $12.15, up from its prior guidance of $9.20 to $11.00 and above the $10.82 consensus estimate. The company left its full-year sales guidance unchanged at $6.7 billion to $6.9 billion, in line with the $6.84 billion consensus, but raised its same-store sales outlook to flat-to-2.5% growth from a prior range of a 0.75% decline to 2.5% growth.

Adjusted operating income guidance was lifted to $535 million-$605 million from $480 million-$560 million, and adjusted EBITDA guidance was raised to $730 million-$800 million from $665 million-$745 million.

For the third quarter, Signet guided for total sales of $1.37 billion to $1.41 billion, with same-store sales expected to range from a 1.0% decline to 2.0% growth. It guided adjusted operating income of $31 million to $48 million and adjusted EBITDA of $82 million to $100 million.