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 Mar 31, 2025
Ownership Breakdown
92
Institutional Holders
▼ 7 vs Q4
$265.92M
Total Inst. Value
▼ $96.61M vs Q4
96.59M
Shares Outstanding
freeFloat 98.68%
83.10M
13F Shares Held
▼ 433,357 vs Q4
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
Q1 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
STARBOARD VALUE LP patent owners & lessors | 61.12M | 63.66% | 63.66% | $195.60B | May 15, 2025 | — held |
STATE STREET CORP patent owners & lessors | 2.81M | 2.92% | 2.92% | $8.98B | May 15, 2025 | ▼ 150.9K |
BLACKROCK, INC. patent owners & lessors | 2.46M | 2.57% | 2.57% | $7.88B | May 2, 2025 | ▼ 42.3K |
DIMENSIONAL FUND ADVISORS LP patent owners & lessors | 2.45M | 2.55% | 2.55% | $7.83B | May 13, 2025 | ▲ 144.8K |
VANGUARD GROUP INC patent owners & lessors | 2.23M | 2.33% | 2.33% | $7.15B | May 9, 2025 | ▼ 15.1K |
RENAISSANCE TECHNOLOGIES LLC patent owners & lessors | 1.58M | 1.64% | 1.64% | $5.05B | May 14, 2025 | ▼ 17.1K |
KRILOGY FINANCIAL LLC patent owners & lessors | 1.16M | 1.21% | 1.21% | $3.71B | Apr 16, 2025 | ▲ 120.0K |
PACIFIC RIDGE CAPITAL PARTNERS, LLC patent owners & lessors | 959.4K | 99.92% | 99.92% | $3.07B | May 9, 2025 | ▼ 45.1K |
FORMIDABLE ASSET MANAGEMENT, LLC patent owners & lessors | 918.6K | 95.67% | 95.67% | $2.94B | May 5, 2025 | ▼ 84.3K |
GEODE CAPITAL MANAGEMENT, LLC patent owners & lessors | 880.0K | 91.65% | 91.65% | $2.82B | May 13, 2025 | ▼ 15.6K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q1 2025 vs prior quarter
Q1 2025
23
Increased
+1.93M shares1
New Positions
first time holders22
Decreased
−1.92M shares0
Sold Out
fully exitedNet shares change (top 50)
+10.7K
+1.93M / −1.92M
Net new holders
+2
1 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 86.0% of total shares outstanding. Company insiders own approximately 1.32%, while retail and public investors account for the remaining 12.65%.
The largest institutional shareholder of Acacia Research Corporation is STARBOARD VALUE LP, holding approximately 61.12 million shares — equal to 63.66% of outstanding shares — as of March 31, 2025.
A total of 92 institutional investors currently hold ACTG stock, with a combined institutional value of approximately $265,917,321 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 86.0% of shares. The largest shareholder is STARBOARD VALUE LP with a 63.66% stake. Company insiders hold 1.32%. Data sourced from SEC Form 13F as of March 31, 2025.