History: All Acquisitions of Western Digital

Here is the list of all acquisitions (23) of Western Digital, the biggest ones being HGST and SanDisk.

Month	Year	Acquired company	Price in $ million	Activity of acquired company
NA	1986	Paradise Systems	NA	Video graphic cards
NA	1986	Adaptive Data Systems	NA	SCSI devices
4	1987	Faraday Electronics	NA	Core logic products
1	1987	ViaNetix	2.2	LAN system software
12	1987	Tandon (assets)	80	HDD manufacturing
6	1988	Verticom	12	High-resolution video graphics monitors
NA	1994	Moduline Solutions	NA	FC products
9	2003	Read-Rite	180	Disk heads manufacturing
0	2007	Mionet	NA	Software for remote access and file sharing for CE products
8	2007	Komag	984	Rigid disk media for HDDs
8	2008	ST Microelectronics (part of)	NA	HDD controllers
4	2009	SiliconSystems	65	SSDs for embedded systems
7	2010	Hoya Magnetic Media Operations	233	Magnetic media sputtering operations
3	2011	Hitachi GST	4,800	HDD manufacturer; deal closed in March 2012
1	2013	Arkeia Software	NA	Backup software for SMBs
6	2013	sTec	340	SSD maker, incorporated into HGST
8	2013	Velobit	NA	Caching software for SSD
9	2013	Virident Systems	685	PCIe SSD
12	2014	Skyera	NA	AFA incorporated into HGST
3	2015	Amplidata	NA	SDS for high capacity scale out storage; integrated into HGST
10	2015	SanDisk	16,000	Flash products
8	2017	Upthere	NA	Home cloud backup
8	2017	Tegile Systems	NA	Multi-protocol SSD/HDD array with de-dupe for primary storage