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QLogic Corporation
IndustryComputer Networking
HeadquartersAliso Viejo, California, USA
Key people
Jean Hu (CEO)
ProductsFibre Channel adapters, converged network adapters, Ethernet adapters, iSCSI adapters, and ASICs
Number of employees
1,229 (2013)[1]
QLogic SAN-switch with optical FC connectors installed.
QLogic QLE2562 dual port 8Gb Fibre Channel host bus adapter card.

QLogic Corporation is an American manufacturer of networking server and storage networking connectivity and application acceleration products, based in Aliso Viejo, California through 2016.[2] QLogic’s products include Fibre Channel adapters, converged network adapters for Fibre Channel over Ethernet (FCoE), Ethernet network interface controllers, iSCSI adapters, and application-specific integrated circuits (ASICs). It was a public company from 1992 to 2016.


QLogic was created in 1992 after being spun off by Emulex. QLogic's original business was disk controllers. This business was sold to Marvell Technology Group in 2005. QLogic had its initial public offering in 1994 and was traded on NASDAQ under the symbol QLGC. Originally located in a Costa Mesa, California building adjacent to Emulex, it competed against its parent company in the market for Fibre Channel controllers for storage area networks.[3]

QLogic acquired companies including NetXen. Integrated circuit designer Silicon Design Resources Inc. based in Austin, Texas, was acquired for about $2 million in 1998.[4] In May 2000, QLogic acquired Fibre Channel switch maker Ancor Communications for about $1.7 billion in stock.[5] Little Mountain Group, founded in 1999 and developer of iSCSI technology, was acquired in January 2001 for about $30 million.[6] The compiler company PathScale was acquired for about $109 million in February 2006.[7] Silverstorm Technologies, which designed InfiniBand products, was acquired in October 2006 for about $60 million.[8] After attempting to use PathScale for cluster computing over InfiniBand, the compiler business was sold to SiCortex in August 2006.[9]

QLogic was led by chairman H.K. Desai from 1996, who became executive chairman in 2010 until his death in June 2014.[10] In 2012, the InfiniBand products were sold to Intel for $125 million.[11] Simon Biddiscombe became chief executive in November 2010, until resigning in May 2013 after two years of falling revenue.[12][1] Prasad Rampalli became chief executive a few months later, until August 2015. Jean Hu became acting CEO again at that time.[13]

QLogic announced it was being acquired by Cavium in June 2016, for about $1 billion over its balance sheet cash.[14] After the deal closed in August 2016, job cuts were announced.[15] It announced it would move to Irvine, California in 2017.[2]


The company makes a range of networking products for storage and converged networks. Storage networking products include Fibre Channel caching adapters, Fibre Channel adapters, iSCSI adapters and Fibre Channel switches. Converged network products include Converged Network Adapters and Intelligent Ethernet Adapters.


  • 2005: Acquired Troika Networks and storage virtualization products
  • 2009: Acquired NetXen and Intelligent Ethernet Adapter products
  • 2014: Signed a broad technology alliance agreement with Brocade Communications Systems and acquired its fibre channel and converged network adapter business
  • 2014: Acquired certain 10/40/100 Gb Ethernet controller and NIC-related assets from Broadcom


  1. ^ a b "Form 10-K: Annual Report for the Fiscal Year Ending March 31, 2013". US Securities and Exchange Commission. May 15, 2013. Retrieved February 8, 2017.
  2. ^ a b Hannah Madans (December 5, 2016). "QLogic will downsize as it exits Aliso Viejo and moves to Irvine in summer 2017". The Orange County Register. Retrieved February 8, 2017.
  3. ^ Andrew Pollack (July 12, 1999). "Qlogic Gains Force In Data Transfer". Chicago Tribune. Retrieved February 8, 2017.
  4. ^ Dow Jones (August 21, 1998). "QLogic Acquires Chip Designer, Marketer". Los Angeles Times. Retrieved February 8, 2017.
  5. ^ "Qlogic Plans To Acquire Ancor In Deal Valued At $1.7 Billion". Chicago Tribune. May 9, 2000. Retrieved February 8, 2017.
  6. ^ Scott Bekker (January 24, 2001). "QLogic Furthers iSCSI with Acquisition of Little Mountain Group". Redmond Magazine. Retrieved February 9, 2017.
  7. ^ Ashlee Vance (February 18, 2006). "QLogic has an Infiniband moment with PathScale buy: $109m Opteron/Xeon play". The Register. Retrieved February 9, 2017.
  8. ^ "Qlogic buys Silverstorm Technologies". The Orange County Register. October 4, 2006. Retrieved February 8, 2017.
  9. ^ Marvyn (August 2, 2007). "PathScale compiler moves to SiCortex". Inside HPC. Retrieved February 8, 2017.
  10. ^ Chris Casacchia (June 9, 2014). "QLogic's Desai Dies at 68". Orange County Business Journal. Retrieved February 8, 2017.
  11. ^ Whittaker, Zack. "Intel buys QLogic's InfiniBand assets for $125 million". ZDNet. Retrieved 2019-02-02.
  12. ^ Chris Mellow (May 20, 2013). "Flailing QLogic's boss gives up CEO, president gigs: That seat on the board? You can have that too..." The Register. Retrieved February 8, 2017.
  13. ^ Chris Mellow (August 22, 2015). "QLogic CEO is out, search for successor underway: Prasad Rampalli joins list of ex-execs 'pursuing other opps'". The Register. Retrieved February 8, 2017.
  14. ^ Larry Dignan (June 15, 2016). "Cavium buys QLogic in $1.36 billion data center processor deal". ZDNet. Retrieved February 8, 2017.
  15. ^ Hannah Madans (August 30, 2016). "QLogic to cut nearly 70 jobs following Cavium acquisition". The Orange County Register. Retrieved February 8, 2017.

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