Acacia Research Corporation
Ownership
Ownership Structure
Who owns Acacia Research Corporation (ACTG)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 35.8% of the shares are freely tradable; institutional investors hold 88.6%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Starboard Value LP | 62.64 | 61,123,595 | +0.0 | 06/30/2026 |
| State Street Corp | 3.25 | 3,166,717 | +2.0 | 06/30/2026 |
| Dimensional Fund Advisors, Inc. | 3.01 | 2,941,723 | +3.1 | 06/30/2026 |
| BlackRock Inc | 2.66 | 2,597,274 | +7.9 | 06/30/2026 |
| Vanguard Capital Management, LLC | 1.52 | 1,485,187 | -7.0 | 06/30/2026 |
| Renaissance Technologies Corp | 1.45 | 1,415,088 | +0.5 | 06/30/2026 |
| The Goldman Sachs Group Inc | 1.20 | 1,175,163 | +101.2 | 06/30/2026 |
| Krilogy Advisors LLC | 1.16 | 1,127,831 | +0.0 | 06/30/2026 |
| Peapod Lane Capital LLC | 1.02 | 994,770 | -8.8 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 1.09 | 1,067,521 | +0.0 | 09/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Oconnell Maureen | Director | 254,655 | 1,069,551 $ | Sep 3, 2026 | direct |
| Molinelli Gavin | Director | 212,927 | 894,293 $ | Sep 30, 2026 | direct |
| Kohlberg Isaac T. | Director | 54,310 | 228,102 $ | Sep 15, 2026 | direct |
| Felman Michelle | Director | 25,052 | 105,218 $ | Aug 28, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 30, 2026 | Molinelli Gavin | Director | Other | 6,961 | 4.31 | 30,002 |
| Sep 15, 2026 | Kohlberg Isaac T. | Director | Sell | 24,000 | 4.55 | 109,200 |
| Sep 3, 2026 | Oconnell Maureen | Director | Sell | 12,466 | 4.57 | 56,970 |
| Sep 2, 2026 | Oconnell Maureen | Director | Sell | 20,534 | 4.63 | 95,072 |
| Aug 28, 2026 | Felman Michelle | Director | Other | 16,086 | 4.49 | 72,226 |
| Aug 19, 2026 | Oconnell Maureen | Director | Sell | 10,000 | 4.60 | 46,000 |
| Aug 12, 2026 | Kohlberg Isaac T. | Director | Sell | 32,188 | 4.67 | 150,318 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: November 2, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.