Starboard Value & Opportunity Master Fund Ltd (CIK 0001373638)

Latest company ownership

Role: Other
Shares held
1,825,619
Last filed at
Mar 8, 2024
Confidence Score
50.0
2025Q4
Confidence Score History
2024Q1 2025Q4
Role: 10% Owner
Shares held
1,500,174
Last filed at
Dec 7, 2016
Confidence Score
50.0
2025Q4
Confidence Score History
2013Q1 2025Q4
Role: 10% Owner
Shares held
1,067,523
Last filed at
Dec 22, 2010
Confidence Score
50.0
2025Q4
Confidence Score History
2010Q2 2025Q4
Role: 10% Owner
Shares held
437,753
Last filed at
Aug 15, 2012
Confidence Score
50.0
2025Q4
Confidence Score History
2012Q3 2025Q4
Role: 10% Owner
Shares held
222,056
Last filed at
Mar 18, 2013
Confidence Score
50.0
2025Q4
Confidence Score History
2013Q1 2025Q4

Recent buy/sell transactions

Exec date Filing date Company Role Signal Confidence Shares % of shares Under plan? Amount (USD)
Mar 6, 2024 Mar 8, 2024 GREEN DOT CORP Other Sell 17.5 -275,729 -5.21% $2.3M
Dec 6, 2016 Dec 7, 2016 QUANTUM CORP /DE/ 10% Owner Sell 16.3 -7,850,000 -51.08% $7.2M
Dec 1, 2016 Dec 5, 2016 QUANTUM CORP /DE/ 10% Owner Sell 17.5 -3,600,000 -18.98% $3.3M
Mar 16, 2016 Mar 18, 2016 QUANTUM CORP /DE/ 10% Owner Sell 17.5 -1,726,004 -8.34% $1.1M
Jan 22, 2016 Jan 26, 2016 QUANTUM CORP /DE/ 10% Owner Sell 17.5 -5,000,000 -19.46% $3.6M
Apr 4, 2013 Apr 8, 2013 QUANTUM CORP /DE/ 10% Owner Buy 97.5 +250,000 10.31% $308.1K
Apr 1, 2013 Apr 3, 2013 QUANTUM CORP /DE/ 10% Owner Buy 100.0 +1,425,000 142.50% $1.8M
Mar 15, 2013 Mar 18, 2013 EXTREME NETWORKS INC 10% Owner Sell 20.0 -120,300 -1.28% $428.8K
Mar 13, 2013 Mar 15, 2013 QUANTUM CORP /DE/ 10% Owner Buy 100.0 +1,000,000 100.00% $1.2M
Aug 13, 2012 Aug 15, 2012 SURMODICS INC 10% Owner Sell 17.5 -80,200 -4.38% $1.4M
Aug 8, 2012 Aug 10, 2012 SURMODICS INC 10% Owner Sell 17.5 -257,560 -12.33% $4.6M
Dec 20, 2010 Dec 22, 2010 IMMERSION CORP 10% Owner Sell 17.5 -471,250 -14.34% $2.9M
Dec 15, 2010 Dec 17, 2010 IMMERSION CORP 10% Owner Sell 20.0 -59,400 -1.78% $358.7K
Dec 13, 2010 Dec 15, 2010 IMMERSION CORP 10% Owner Sell 17.5 -219,013 -6.15% $1.3M
Dec 8, 2010 Dec 13, 2010 IMMERSION CORP 10% Owner Sell 20.0 -70,187 -1.93% $427K
Nov 4, 2010 Nov 8, 2010 IMMERSION CORP 10% Owner Sell 51.3 -2,500 -0.07% $15.4K
Oct 28, 2010 Nov 1, 2010 IMMERSION CORP 10% Owner Sell 17.5 -259,628 -3.50% $1.6M
Oct 22, 2010 Oct 22, 2010 IMMERSION CORP 10% Owner Sell 52.5 -826 -0.02% $5.2K
Oct 19, 2010 Oct 21, 2010 IMMERSION CORP 10% Owner Sell 17.5 -176,550 -4.33% $1.1M
Aug 5, 2010 Aug 9, 2010 IMMERSION CORP 10% Owner Sell 51.3 -4,006 -0.10% $23.9K
Aug 3, 2010 Aug 5, 2010 IMMERSION CORP 10% Owner Sell 40.0 -20,368 -0.50% $119.7K
Jul 27, 2010 Jul 29, 2010 IMMERSION CORP 10% Owner Sell 51.3 -1,910 -0.05% $11.2K
Apr 29, 2010 May 3, 2010 IMMERSION CORP 10% Owner Sell 40.0 -20,486 -0.50% $121.4K
Apr 27, 2010 Apr 29, 2010 IMMERSION CORP 10% Owner Sell 32.5 -34,802 -0.84% $206.8K
Apr 23, 2010 Apr 27, 2010 IMMERSION CORP 10% Owner Sell 32.5 -34,991 -0.84% $212K