SEC Form 4 · Updated Daily
ACTG
— ACACIA RESEARCH CORPORATION OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| Starboard Principal Co LP | 10%+ Owner | 8,210,058 | 2025-05-16 | J |
| Feld Peter A | Director | 8,210,058 | 2025-05-16 | J |
| Starboard Principal Co GP LLC | 10%+ Owner | 8,210,058 | 2025-05-16 | J |
| Smith Jeffrey C | 10%+ Owner | 8,210,058 | 2025-05-16 | J |
| Starboard Value LP | 10%+ Owner | 8,210,058 | 2025-05-16 | J |
| STARBOARD VALUE & OPPORTUNITY MASTER FUND LTD | 10%+ Owner | 8,210,058 | 2025-05-16 | J |
| STARBOARD VALUE & OPPORTUNITY S LLC | 10%+ Owner | 8,210,058 | 2025-05-16 | J |
| Starboard Value & Opportunity C LP | 10%+ Owner | 8,210,058 | 2025-05-16 | J |
| Starboard Value & Opportunity Master Fund L LP | 10%+ Owner | 8,210,058 | 2025-05-16 | J |
| Starboard X Master Fund Ltd | 10%+ Owner | 8,210,058 | 2025-05-16 | J |
| Starboard Value R LP | 10%+ Owner | 8,210,058 | 2025-05-16 | J |
| Starboard Value L LP | 10%+ Owner | 8,210,058 | 2025-05-16 | J |
| Starboard Value GP LLC | 10%+ Owner | 8,210,058 | 2025-05-16 | J |
| Starboard Value R GP LLC | 10%+ Owner | 8,210,058 | 2025-05-16 | J |
| MARXE AUSTIN W & GREENHOUSE DAVID M | 10%+ Owner | 3,000,000 | 2006-12-15 | — |
| AKIN THOMAS B | Director | 1,434,184 | 2007-05-04 | P |
| McNulty Martin D. Jr. | Director · Officer | 705,563 | 2026-06-05 | A |
| GRAZIADIO G LOUIS III | Director | 605,051 | 2018-03-14 | P |
| Tobia Alfred Victor Jr. | Director | 588,462 | 2020-12-16 | P |
| RYAN PAUL R | Officer | 430,891 | 2013-07-31 | S |
| Walsh Frank E. III | Director | 395,726 | 2017-11-15 | M |
| HARRIS ROBERT L II | Director | 379,609 | 2015-12-01 | P |
| Booth Marc W. | Officer | 334,907 | 2023-06-18 | F |
| KUMAR AMIT | Director | 328,614 | 2007-05-04 | P |
| Soncini Jason W. | Officer | 284,600 | 2026-06-05 | A |
| Press Clifford | Director · Officer | 268,836 | 2022-09-06 | F |
| OCONNELL MAUREEN | Director | 267,121 | 2026-09-02 | S |
| Vella Matthew | Director · Officer | 245,884 | 2015-05-20 | S |
| Golby Lawrence Wesley | Officer | 230,035 | 2022-08-01 | F |
| Molinelli Gavin | Director | 212,927 | 2026-09-30 | A |
| Wolanyk Katharine | Director | 192,310 | 2023-05-26 | A |
| Key Marvin E | Officer | 190,833 | 2016-04-25 | P |
| Sagal Jonathan | Director | 189,227 | 2023-05-26 | A |
| Rosenstein Richard Jay | Officer | 176,074 | 2022-06-06 | F |
| HAYNES CLAYTON J | Officer | 162,615 | 2018-08-09 | A |
| Treska Edward Joseph | Officer | 123,983 | 2018-08-09 | A |
| Sundar Ajay | Director | 107,605 | 2026-06-23 | A |
| Rasamny Robert | Officer | 102,366 | 2026-06-05 | A |
| RIBAR GEOFFREY G | Director | 85,827 | 2025-05-30 | A |
| Hoover Kirsten | Officer | 84,677 | 2025-06-09 | F |
| Simmons Meredith A. | Officer | 80,000 | 2020-06-04 | A |
| DEBOOM FRED A | Director | 78,600 | 2016-03-02 | A |
| FRYKMAN EDWARD W | Director | 73,290 | 2015-01-02 | A |
| Lee Dooyong | Officer | 69,467 | 2012-12-06 | S |
| Kohlberg Isaac T. | Director | 54,310 | 2026-09-15 | S |
| Stewart Robert B Jr | Officer | 52,500 | 2018-09-07 | S |
| Rinaldini Luis E. | Director | 49,888 | 2019-07-30 | A |
| Anderson William S. | Director | 47,370 | 2015-01-02 | A |
| FELMAN MICHELLE | Director | 41,138 | 2026-08-28 | G |
| BRADLEY C ALLEN JR | Director | 38,462 | 2019-05-08 | A |
| BERMAN ROBERT ANDREW | Officer | 33,405 | 2007-02-08 | M |
| Zambito Michael SIKORYAK | Officer | 7,700 | 2025-08-11 | P |
| CURRIE F RIDGON | Director | 5,000 | 2007-03-20 | M |
| SANDERS JAMES F | Director | 3,000 | 2017-07-18 | — |
| Davis Joseph E. | Director | 0 | 2018-03-30 | — |
| Falzone Paul | Director | 0 | 2018-03-30 | — |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-09-30 | Molinelli Gavin | Grant / award | 6,961 | $4.31 | 212,927 |
| 2026-09-15 | Kohlberg Isaac T. | Open-market sale | 24,000 | $4.55 | 54,310 |
| 2026-09-03 | OCONNELL MAUREEN | Open-market sale | 12,466 | $4.57 | 254,655 |
| 2026-09-02 | OCONNELL MAUREEN | Open-market sale | 20,534 | $4.63 | 267,121 |
| 2026-08-28 | FELMAN MICHELLE | Gift | 16,086 | $4.49 | 25,052 |
| 2026-08-28 | FELMAN MICHELLE | Gift | 16,086 | $4.49 | 41,138 |
| 2026-08-19 | OCONNELL MAUREEN | Open-market sale | 10,000 | $4.60 | 287,655 |
| 2026-08-12 | Kohlberg Isaac T. | Open-market sale | 32,188 | $4.67 | 78,310 |
| 2026-06-30 | Molinelli Gavin | Grant / award | 6,438 | $4.66 | 205,966 |
| 2026-06-23 | FELMAN MICHELLE | Grant / award | 25,052 | $0.00 | 57,224 |
| 2026-06-23 | OCONNELL MAUREEN | Grant / award | 25,052 | $0.00 | 297,655 |
| 2026-06-23 | Kohlberg Isaac T. | Grant / award | 25,052 | $0.00 | 110,498 |
| 2026-06-23 | Molinelli Gavin | Grant / award | 25,052 | $0.00 | 199,528 |
| 2026-06-23 | Sundar Ajay | Grant / award | 4,175 | $4.79 | 107,605 |
| 2026-06-08 | McNulty Martin D. Jr. | Tax withholding | 287,133 | $4.62 | 418,430 |
| 2026-06-08 | Rasamny Robert | Tax withholding | 28,390 | $4.62 | 73,976 |
| 2026-06-08 | Soncini Jason W. | Tax withholding | 48,985 | $4.62 | 235,615 |
| 2026-06-05 | McNulty Martin D. Jr. | Grant / award | 539,160 | $0.00 | 705,563 |
| 2026-06-05 | Rasamny Robert | Grant / award | 60,285 | $0.00 | 102,366 |
| 2026-06-05 | Soncini Jason W. | Grant / award | 93,049 | $0.00 | 284,600 |
| 2026-03-31 | Sundar Ajay | Grant / award | 4,158 | $4.81 | 103,430 |
| 2026-03-31 | Molinelli Gavin | Grant / award | 6,237 | $4.81 | 174,476 |
| 2026-03-23 | Soncini Jason W. | Tax withholding | 6,147 | $4.85 | 191,551 |
| 2026-03-10 | McNulty Martin D. Jr. | Tax withholding | 8,207 | $4.15 | 166,403 |
| 2025-12-31 | Molinelli Gavin | Grant / award | 8,021 | $3.74 | 168,239 |
| 2025-12-31 | Sundar Ajay | Grant / award | 5,348 | $3.74 | 99,272 |
| 2025-09-30 | Molinelli Gavin | Grant / award | 9,231 | $3.25 | 160,218 |
| 2025-09-30 | Sundar Ajay | Grant / award | 6,154 | $3.25 | 93,924 |
| 2025-08-11 | FELMAN MICHELLE | Gift | 11,561 | $0.00 | 32,172 |
| 2025-08-11 | FELMAN MICHELLE | Gift | 11,560 | $0.00 | 43,733 |
| 2025-08-11 | Zambito Michael SIKORYAK | Open-market buy | 7,700 | $3.27 | 7,700 |
| 2025-06-30 | Molinelli Gavin | Grant / award | 8,380 | $3.58 | 150,987 |
| 2025-06-30 | Sundar Ajay | Grant / award | 5,587 | $3.58 | 87,770 |
| 2025-06-24 | Zambito Michael SIKORYAK | — | — | — | 0 |
| 2025-06-11 | Kohlberg Isaac T. | Open-market sale | 16,000 | $3.84 | 85,446 |
| 2025-06-09 | Hoover Kirsten | Tax withholding | 6,464 | $3.83 | 84,677 |
| 2025-06-09 | McNulty Martin D. Jr. | Tax withholding | 10,507 | $3.83 | 174,610 |
| 2025-06-09 | Rasamny Robert | Tax withholding | 6,657 | $3.83 | 42,081 |
| 2025-06-09 | Soncini Jason W. | Tax withholding | 11,486 | $3.83 | 197,698 |
| 2025-05-30 | FELMAN MICHELLE | Grant / award | 32,172 | $0.00 | 55,293 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.