Acacia Research Corp
A holding company that buys and runs businesses across technology, energy, industrials, healthcare, and business services, Acacia Research was founded in 1993 by Bruce Stewart and became famous for licensing and enforcing patents. Its name comes from the Greek word akakia, a genus of spiny trees and shrubs. Today it operates as a value-oriented acquirer, with activist investor Starboard Value as its controlling shareholder.
Granted 56.12M
Granted 56.12M
Bought 2.10M · Sold 85.2K
Granted 145.1K · Bought 999.8K · Sold 59.5K
Granted 531.9K · Bought 210.0K
Granted 1.27M · Bought 40.0K · Sold 1.39M
Granted 686.6K · Bought 64.3K
Granted 43.6K · Bought 317.1K
Granted 1.28M · Bought 269.6K · Sold 1.30M
Granted 379.6K · Bought 40.0K · Sold 40.3K
Granted 30.0K · Bought 300.0K · Sold 30.0K
Granted 100.0K
Granted 272.7K · Bought 25.0K
Granted 531.9K
Granted 196.8K · Sold 93.6K
Granted 381.8K · Bought 35.5K
Bought 155.0K
Granted 199.5K
Granted 192.3K
Granted 189.2K
Granted 176.5K · Bought 25.0K · Sold 9.6K
Granted 569.5K · Bought 2.0K · Sold 400.2K
Granted 147.9K · Sold 31.0K
Granted 107.6K
Granted 489.9K · Bought 2.5K · Sold 372.9K
Granted 85.8K
Granted 79.6K · Sold 12.5K
Granted 80.0K
Granted 123.8K · Bought 2.0K · Sold 72.3K
Granted 115.7K
Granted 130.5K · Sold 77.4K
Granted 1.11M · Sold 1.24M
Granted 80.3K
Granted 66.1K · Bought 5.0K · Sold 112.3K
Granted 49.9K
Granted 47.2K · Bought 10.0K
Granted 38.5K
Bought 35.0K
Granted 117.7K · Sold 117.7K
Bought 7.7K
Granted 24.0K · Sold 29.0K
| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| Feld Peter A +3 co-filers10% owner, See Footnote 2 · 22 transactions | — | 64.38Mas of May 2025 | 56.12M | — | — |
| Starboard Value & Opportunity Master Fund LTD +9 co-filers10% owner, See Footnote 2 · 22 transactions | — | 64.38Mas of May 2025 | 56.12M | — | — |
| Akin Thomas BDirector · 9 transactions | — | 2.15Mas of May 2007 | — | 2.10M | 85.2K |
| Graziadio G Louis IIIDirector · 117 transactions | — | 1.98Mas of Mar 2018 | 145.1K | 999.8K | 59.5K |
| Tobia Alfred Victor Jr.President & CIO, Director · 30 transactions | — | 588.5Kas of Dec 2020 | 531.9K | 210.0K | — |
| Ryan Paul RCEO, Director · 308 transactions | — | 430.9Kas of Jul 2013 | 1.27M | 40.0K | 1.39M |
| McNulty Martin D. Jr.Chief Executive Officer, Director · 13 transactions | — | 418.4K | 686.6K | 64.3K | — |
| Walsh Frank E. IIIDirector · 23 transactions | — | 395.7Kas of Nov 2017 | 43.6K | 317.1K | — |
| Harris Robert L IIExecutive Chairman, Director · 229 transactions | — | 379.6Kas of Dec 2015 | 1.28M | 269.6K | 1.30M |
| Booth Marc W.Chief IP Officer · 24 transactions | — | 334.9Kas of Jun 2023 | 379.6K | 40.0K | 40.3K |
| Kumar AmitPres/CEO of CombiMatrix Corp., Director · 23 transactions | — | 328.6Kas of May 2007 | 30.0K | 300.0K | 30.0K |
| Golby Lawrence WesleyChief Investment Officer · 3 transactions | — | 316.7Kas of Aug 2022 | 100.0K | — | — |
| Oconnell MaureenDirector · 11 transactions | — | 297.7K | 272.7K | 25.0K | — |
| Press CliffordChief Executive Officer, Director · 5 transactions | — | 268.8Kas of Sep 2022 | 531.9K | — | — |
| Vella MatthewCEO & President, Director · 20 transactions | — | 245.9Kas of May 2015 | 196.8K | — | 93.6K |
| Soncini Jason W.General Counsel · 25 transactions | — | 235.6K | 381.8K | 35.5K | — |
| Key Marvin EChief Executive Officer · 3 transactions | — | 234.3Kas of Aug 2016 | — | 155.0K | — |
| Molinelli GavinDirector · 12 transactions | — | 199.5K | 199.5K | — | — |
| Wolanyk KatharineDirector · 6 transactions | — | 192.3Kas of May 2023 | 192.3K | — | — |
| Sagal JonathanDirector · 7 transactions | — | 189.2Kas of May 2023 | 189.2K | — | — |
| Rosenstein Richard JayChief Financial Officer · 7 transactions | — | 176.1Kas of Jun 2022 | 176.5K | 25.0K | 9.6K |
| Haynes Clayton JCFO · 231 transactions | — | 138.5Kas of Aug 2018 | 569.5K | 2.0K | 400.2K |
| Kohlberg Isaac T.Director · 10 transactions | — | 110.5K | 147.9K | — | 31.0K |
| Sundar AjaySee Footnote 1 · 11 transactions | — | 107.6K | 107.6K | — | — |
| Treska Edward JosephEVP, General Counsel & Sec · 121 transactions | — | 90.3Kas of Aug 2018 | 489.9K | 2.5K | 372.9K |
| Ribar Geoffrey GDirector · 3 transactions | — | 85.8Kas of May 2025 | 85.8K | — | — |
| Hoover KirstenInterim CFO · 13 transactions | — | 84.7Kas of Jun 2025 | 79.6K | — | 12.5K |
| Simmons Meredith A.General Counsel · 1 transaction | — | 80.0Kas of Jun 2020 | 80.0K | — | — |
| Deboom Fred ADirector · 54 transactions | — | 76.1Kas of Mar 2016 | 123.8K | 2.0K | 72.3K |
| Rasamny RobertChief Administrative Officer · 5 transactions | — | 74.0K | 115.7K | — | — |
| Frykman Edward WDirector · 21 transactions | — | 73.3Kas of Mar 2016 | 130.5K | — | 77.4K |
| Lee DooyongExecutive Vice President · 207 transactions | — | 69.5Kas of Dec 2012 | 1.11M | — | 1.24M |
| Felman MichelleDirector · 5 transactions | — | 57.2K | 80.3K | — | — |
| Stewart Robert B JrPresident · 5 transactions | — | 52.5Kas of Sep 2018 | 66.1K | 5.0K | 112.3K |
| Rinaldini Luis E.Director · 2 transactions | — | 49.9Kas of Jul 2019 | 49.9K | — | — |
| Anderson William S.Director · 18 transactions | — | 47.4Kas of Mar 2016 | 47.2K | 10.0K | — |
| Bradley C Allen JrDirector · 1 transaction | — | 38.5Kas of May 2019 | 38.5K | — | — |
| Walsh Frank E IIIDirector · 1 transaction | — | 35.0Kas of Apr 2016 | — | 35.0K | — |
| Berman Robert AndrewCOO, Gen'l Counsel, Secretary · 16 transactions | — | 30.0Kas of Feb 2007 | 117.7K | — | 117.7K |
| Zambito Michael SIKORYAKChief Financial Officer · 1 transaction | — | 7.7Kas of Aug 2025 | — | 7.7K | — |
| Currie F RidgonDirector · 19 transactions | — | 0as of Mar 2007 | 24.0K | — | 29.0K |
Select a row to see that insider’s individual transactions. Sum of the holdings confirmed in the 12 months before this insider's last filing. A Form 4 reports a holding per line — held directly, or through a named trust, partnership or foundation, and in each share class separately — never a person’s total. Lines not restated in that time are left out and shown apart: an active filer restates what they still hold, so a line they did not restate is more often an entity since renamed, whose shares a successor line reports too. An amber marker means some were left out.
Net open-market activity over all recorded history: -824.2K shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.