The stock has advanced 4.4 per cent this year, compared with the 12 per cent increase in the benchmark Kospi index.
Net income, excluding minority interests, fell 40 per cent to 4.52 trillion won ($4.2 billion) in the quarter ended March, the Suwon, South Korea-based company said.
Samsung, the world's biggest chipmaker, said it should capitalise on stronger demand for the semiconductors used in mobile phones and servers.
Watch: Samsung foregoes plastic in new S6 line
"In the second quarter, the company expects its overall earnings to increase," Samsung said. "In 2015, continued growth is expected due to the growth of emerging smartphone markets, such as China and India."
Operating profit at the mobile-phone unit fell 57 per cent to 2.74 trillion won in the first quarter as Apple won high-end customers.
Samsung shipped 83.2 million smartphones in the March quarter, helping it regain the title of world's biggest vendor after dropping into a tie with Apple in the December period, according to Strategy Analytics. Apple shipped 61.2 million iPhones in the most recent quarter, it said.
Samsung has projected record sales for the high-end S6 smartphones released this month. Samsung will sell 46 million this year, said Kevin Lee, an analyst at Korea Investment & Securities.
The phone is among the Samsung products featured in the new "Avengers: Age of Ultron" movie as part of a global partnership with Marvel Entertainment.
Demand for the curved-screen Edge prompted the company to accelerate production, people familiar with the matter have said. The company can make 5 million units a month, they said.
"Edge supply is fast-improving, so the tight supply situation will be eased during the second quarter," said Park Jin Young, Samsung vice president of mobile communications. "If we look at it over the model's life cycle, S6 will be the best-seller."
Apple this week posted a 33 per cent jump in profit in the quarter ended in March, driven by strong demand for the iPhone 6 models.
Profit at Samsung's semiconductor business, which makes both memory chips and application processors, was 2.93 trillion won, compared with 1.95 trillion won a year earlier.
Samsung, which previously relied on semiconductors from Qualcomm for its mobile devices, switched to its own processor and modem chips for the S6 lineup.
The company also is said to have won orders for the main processors in the next iPhone.
The consumer-electronics division, which oversees TVs and home-appliances, posted a 140 billion-won loss in the quarter from a 190 billion-won profit a year earlier. Samsung expects the unit to have a stronger second quarter on seasonally higher demand for air conditioners and high-end TVs.
Increasing sales of high-margin screens helped Samsung's panel-making division return to operating profit of 520 billion won in the first quarter.
Samsung Display is expanding sales of its organic light-emitting diode, or OLED, panels from Galaxy devices to Chinese device makers, including Lenovo Group.
Samsung Display, which is 85 per cent owned by Samsung Electronics, is said to have created a standalone team of about 200 employees to work exclusively on Apple products.
Capital spending in 2015 will be similar to the year earlier, though "there is a strong possibility that it may increase," Samsung said. The company spent 23.4 trillion won last year.
- Bloomberg