China's state-controlled Tsinghua Unigroup plans to spend a total of about US$2 billion to acquire stakes in ChipMOS Technologies Taiwan and Siliconware Precision Industries (SPIL).

Tsinghua Unigroup is looking to acquire a 25% stake in ChipMOS Taiwan for NT$12 billion (approximately US$368.3 million), according to ChipMOS (Bermuda), which holds 58% of ChipMOS Taiwan. Tsinghua Unigroup will purchase 299.25 million common shares of ChipMOS Taiwan through private placement at a price of NT$40 per unit.

ChipMOS added its ownership in ChipMOS Taiwan would slip to 43.7% after the Tsinghua Unigroup deal completes. ChipMOS Taiwan would use the proceeds from Tsinghua Unigroup's offer for "capacity expansion and technology development in mainland China and Taiwan, potential acquisitions and general corporate purposes."

SPIL reached a similar deal with Tsinghua Unigroup. According to SPIL, Tsinghua Unigroup will subscribe to new shares of SPIL priced at NT$55 per unit and own 24.9% of SPIL after the deal closes.

SPIL will use the funds from Tsinghua Unigroup for "investments in Taiwan, including hardware development and cultivation of local talent to sustain long-term development in Taiwan."

Both ChipMOS Taiwan and SPIL also formed strategic alliances with Tsinghua Unigroup.

"Tsinghua Unigroup will assist ChipMOS Taiwan in expanding and strengthening the relationship between ChipMOS Taiwan and companies relating to the assembly and testing services of LCD drivers and wafer bumping services in Mainland China, and will introduce other potential suppliers, customers and business partners in Mainland China to ChipMOS Taiwan," according to a statement issued by ChipMOS.

In a SPIL statement, the company indicated Unigroup will "facilitate its investee companies to cooperate and build a long-term business relationship with SPIL. SPIL will be able to participate in the prime period of growth for the mainland China semiconductor market and further expand market shares in both mainland China and globally."

After holding 25% of both ChipMOS Taiwan and SPIL, Tsinghua Unigroup will also designate representatives to serve as a director on both ChipMOS Taiwan's and SPIL's boards, the backend firms added.

Tsinghua Unigroup's planned investments in the two Taiwan-based backend firms will require regulatory and shareholder approvals.

Earlier in 2015, Tsinghua Unigroup reached a deal with Powertech Technology (PTI) to invest a total of NT$19.4 billion in Powertech Technology (PTI) through private placement. Tsinghua Unigroup will subscribe to new shares of PTI, which will be priced at NT$75 per unit, for a 25% stake to become the largest shareholder of PTI.