The Stockholm Stock Exchange opened Wednesday's session in positive territory. In the news flow, Systemair has released its year-end report while the IPO of Nordtech marks its trading debut. Both stocks are trending higher.

As of 09:35 CET, the OMXS30 index was up 0.44 percent at 3,083.67. Shares worth approximately SEK 1.6 billion had changed hands on the Stockholm bourse.

Among the major industrial sectors, consumer staples showed the strongest performance with a 1.2 percent gain. At the other end of the spectrum, basic materials lagged with a 0.3 percent decline.

Among the blue-chip stocks included in the OMXS30 index, EQT rose 1.2 percent while Saab B climbed 1.2 percent. Boliden saw the weakest performance, falling 0.7 percent, while Hexagon B dropped 0.5 percent.

Ventilation company Systemair beat analyst expectations for both revenue and adjusted operating profit in the fourth quarter of its broken fiscal year. The board proposes an 7.4 percent dividend hike to SEK 1.45 per share, which was nonetheless below consensus. Systemair aims to double its turnover within seven years. The stock is climbing 9.3 percent.

Nordtech's shares are rising in their debut on Nasdaq Stockholm. The offering to subscribe for shares in the company met with very strong interest and was several times oversubscribed. Nordtech acquires and develops B2B software companies within niche market verticals in the Nordic region. The stock is up 3.7 percent to SEK 62.20, compared to the subscription price of SEK 60 per share.

The advance for private equity firm EQT is attributed to the fact that major shareholder Investor, the investment company, has purchased additional shares for SEK 349 million.

Real estate mogul Rutger Arnhult's holding company, M2 Asset Management, is acquiring Gårdarike's stake in the real estate company Corem. Gårdarike is owned by Rutger Arnhult's brother, Urban Terling. Following the transaction, Arnhult owns 52 percent of the capital and 64 percent of the votes in Corem. Corem's B-shares are down 0.2 percent.

Real estate company Emilshus is issuing 12 million preference shares at a subscription price of SEK 30 per share, representing a 4.9 percent discount to Tuesday's closing price. The company will raise SEK 360 million. The preference share is falling 3.5 percent.

Balcony manufacturer Balco has signed a turnkey contract for a project with a housing cooperative in Nacka, Stockholm. The order value amounts to SEK 106 million. The stock is increasing 3.8 percent.

Volati's common shares have halved in price, which is due to the stock trading ex-rights for shares in Salix Group. The spin-off is scheduled for listing on Nasdaq Stockholm on June 15.

Furthermore, credit management company Intrum's shares are rising by 16 percent, adjusted for the fact that the stock is trading ex-subscription rights in its rights issue.