Samsung Electronics has newly acquired stakes in five start-ups in the first quarter of this year as part of its ongoing efforts to elevate its software prowess.

According to its quarterly report filed Monday, the five firms include SensiFree (15.09 percent), Unispectral (7.76 percent), Zyomed (2.17 percent), Keyssa (2.06 percent) and Bot Home Automation (0.99 percent).

Even though the total spending, worth about 10 billion won ($8.5 million), is not that extensive, the latest shopping spree is also a sneak peek at Samsung’s current business interests.

SensiFree is a Cupertino, California-based start-up that develops contactless sensors for wearable devices, especially for fitness and health care devices or services.

Unispectral, an Israeli start-up developing technology created at Tel Aviv University, produces optical lens and image process software for camera modules.

Keyssa develops connectors for wireless data transfer; Zyomed produces sensors for personal and laboratory-scale medical diagnostics; and Bot Home Automation makes video doorbells for homes.

“Several start-ups are joining Samsung as it is making a big push on software. Samsung Electronics vice chairman Lee Jae-yong also visits Silicon Valley frequently to expand ties there,” an industry source said on condition of anonymity.

The Korean tech giant has acquired some 70 start-ups around the world over the past three years. Its recent acquisitions such as LoopPay and SmartThings are now playing key roles in the company’s software businesses such as mobile payments and smart home services.

In the meantime, the report said that the number of Samsung-affiliated companies was further reduced to 59, including 15 listed firms, in the first quarter. The figure was the lowest since the number peaked at 81 in late 2012.

Amid a pending leadership transfer to a new generation, Samsung has streamlined its sprawling business portfolio, selling off less profitable businesses such as chemicals and defense.

In the first quarter, the company sold off four more units such as Samsung Fine Chemicals and Hantok Chemicals.

By Lee Ji-yoon (jylee@heraldcorp.com)