Acacia Research Corporation
Acacia Research Corporation (ACTG) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · ACTG · as of Sep 30, 2025
Ownership Breakdown
89
Institutional Holders
▲ 2 vs Q2
$273.83M
Total Inst. Value
▼ $25.52M vs Q2
96.59M
Shares Outstanding
freeFloat 98.68%
84.08M
13F Shares Held
▲ 423,787 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
ACTG largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
STARBOARD VALUE LP patent owners & lessors | 61.12M | 63.58% | 63.58% | $198.65B | Nov 14, 2025 | — held |
STATE STREET CORP patent owners & lessors | 2.79M | 2.90% | 2.90% | $9.07B | Nov 14, 2025 | ▼ 26.1K |
DIMENSIONAL FUND ADVISORS LP patent owners & lessors | 2.75M | 2.86% | 2.86% | $8.93B | Nov 12, 2025 | ▲ 32.2K |
BLACKROCK, INC. patent owners & lessors | 2.34M | 2.43% | 2.43% | $7.60B | Nov 12, 2025 | ▼ 29.0K |
VANGUARD GROUP INC patent owners & lessors | 2.28M | 2.37% | 2.37% | $7.42B | Nov 7, 2025 | ▼ 15.1K |
RENAISSANCE TECHNOLOGIES LLC patent owners & lessors | 1.53M | 1.59% | 1.59% | $4.96B | Nov 13, 2025 | ▼ 33.1K |
KRILOGY FINANCIAL LLC patent owners & lessors | 1.20M | 1.25% | 1.25% | $4.34B | Nov 6, 2025 | ▼ 200.2K |
FORMIDABLE ASSET MANAGEMENT, LLC patent owners & lessors | 960.4K | 99.90% | 99.90% | $3.25B | Oct 29, 2025 | ▲ 62.6K |
LEVIN CAPITAL STRATEGIES, L.P. patent owners & lessors | 889.5K | 92.53% | 92.53% | $2.89B | Nov 7, 2025 | ▲ 588.0K |
GEODE CAPITAL MANAGEMENT, LLC patent owners & lessors | 842.8K | 87.67% | 87.67% | $2.74B | Nov 12, 2025 | ▼ 15.8K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
23
Increased
+1.22M shares3
New Positions
first time holders19
Decreased
−828.5K shares0
Sold Out
fully exitedNet shares change (top 50)
+393.9K
+1.22M / −828.5K
Net new holders
+7
3 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
ACTG insider trading · insider activity
Source: SEC Form 4
Insiders have been net buyers of shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
2
Buy transactions
2
Sell transactions
1.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Molinelli Gavin director | Mar 31, 2026 | Award | 6,237 | $4.81 | $30.0K | 174.5K | Form 4 ↗ |
Sundar Ajay director | Mar 31, 2026 | Award | 4,158 | $4.81 | $20.0K | 103.4K | Form 4 ↗ |
Soncini Jason W. General Counsel | Mar 23, 2026 | Tax Withhold | 6,147 | $4.85 | $29.8K | 191.6K | Form 4 ↗ |
McNulty Martin D. Jr. Chief Executive Officer | Mar 10, 2026 | Tax Withhold | 8,207 | $4.15 | $34.1K | 166.4K | Form 4 ↗ |
Sundar Ajay director | Dec 31, 2025 | Award | 5,348 | $3.74 | $20.0K | 99.3K | Form 4 ↗ |
Molinelli Gavin director | Dec 31, 2025 | Award | 8,021 | $3.74 | $30.0K | 168.2K | Form 4 ↗ |
Sundar Ajay director | Sep 30, 2025 | Award | 6,154 | $3.25 | $20.0K | 93.9K | Form 4 ↗ |
Molinelli Gavin director | Sep 30, 2025 | Award | 9,231 | $3.25 | $30.0K | 160.2K | Form 4 ↗ |
Zambito Michael SIKORYAK Chief Financial Officer | Aug 11, 2025 | Purchase | 7,700 | $3.27 | $25.1K | 7.7K | Form 4 ↗ |
FELMAN MICHELLE director | Aug 11, 2025 | Gift | 11,560 | — | — | 43.7K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Acacia Research Corporation (ACTG) is primarily owned by institutional investors, who hold approximately 87.0% of total shares outstanding. Company insiders own approximately 1.32%, while retail and public investors account for the remaining 11.63%.
The largest institutional shareholder of Acacia Research Corporation is STARBOARD VALUE LP, holding approximately 61.12 million shares — equal to 63.58% of outstanding shares — as of September 30, 2025.
A total of 89 institutional investors currently hold ACTG stock, with a combined institutional value of approximately $273,832,357 as of the most recent 13F filing period.
Frequently asked questions
ACTG ownershipAcacia Research Corporation (ACTG) is primarily owned by institutional investors, who hold approximately 87.0% of shares. The largest shareholder is STARBOARD VALUE LP with a 63.58% stake. Company insiders hold 1.32%. Data sourced from SEC Form 13F as of September 30, 2025.