Acacia Research Corporation (ACTG) Ownership
ACTG ownership summary
as of October 18, 2026- Institutions
- 89.1% of shares outstanding
- Insiders
- 1.64% of shares outstanding
- Shares outstanding
- 97.6M
- Float
- 34.9M shares available to trade
- Short interest
- 5.01% 1.8M shares short
- Days to cover
- 9.24 short interest down 13.6% vs prior month
- Institutions 89.11%
- Insiders 1.64%
- Other investors 9.25%
ACTG top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Starboard Value LP | 62.64% | 61.1M | $258.6M | — | June 30, 2026 |
| 2 | State Street Corp | 3.25% | 3.2M | $13.4M | +61,676 (+2.0%) | June 30, 2026 |
| 3 | Dimensional Fund Advisors, Inc. | 3.01% | 2.9M | $12.4M | +87,834 (+3.1%) | June 30, 2026 |
| 4 | BlackRock Inc | 2.66% | 2.6M | $11.0M | +190,907 (+7.9%) | June 30, 2026 |
| 5 | Vanguard Capital Management, LLC | 1.52% | 1.5M | $6.3M | −110,934 (−7.0%) | June 30, 2026 |
| 6 | Renaissance Technologies Corp | 1.45% | 1.4M | $6.0M | +7,504 (+0.5%) | June 30, 2026 |
| 7 | The Goldman Sachs Group Inc | 1.20% | 1.2M | $5.0M | +591,061 (+101.2%) | June 30, 2026 |
| 8 | Krilogy Advisors LLC | 1.16% | 1.1M | $4.8M | +344 (+0.0%) | June 30, 2026 |
| 9 | Peapod Lane Capital LLC | 1.02% | 995K | $4.2M | −96,566 (−8.8%) | June 30, 2026 |
| 10 | Geode Capital Management, LLC | 0.92% | 901K | $3.8M | +43,090 (+5.0%) | June 30, 2026 |
| 11 | Pacific Ridge Capital Partners, LLC | 0.83% | 811K | $3.4M | −6,280 (−0.8%) | June 30, 2026 |
| 12 | Formidable Asset Management LLC | 0.81% | 793K | $3.4M | −45,733 (−5.5%) | June 30, 2026 |
| 13 | American Century Companies Inc | 0.71% | 693K | $2.9M | +181,935 (+35.6%) | June 30, 2026 |
| 14 | Bridgeway Capital Management, LLC | 0.64% | 629K | $2.7M | +25,816 (+4.3%) | June 30, 2026 |
| 15 | Aegis Financial Corporation | 0.50% | 491K | $2.1M | — | June 30, 2026 |
| 16 | Tidal Investments LLC. | 0.43% | 424K | $1.8M | −13,255 (−3.0%) | June 30, 2026 |
| 17 | Empowered Funds, LLC | 0.38% | 366K | $1.5M | +25,816 (+7.6%) | June 30, 2026 |
| 18 | Northern Trust Corp | 0.30% | 290K | $1.2M | +20,188 (+7.5%) | June 30, 2026 |
| 19 | Vanguard Portfolio Management, LLC | 0.30% | 289K | $1.2M | +27,487 (+10.5%) | June 30, 2026 |
| 20 | Susquehanna International Group, LLP | 0.30% | 288K | $1.2M | +92,166 (+47.0%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 13 holders added 1.4M shares and 5 cut 273K.
ACTG top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard MStar Total Stk Mkt Idx Invest | 1.09% | 1.1M | $4.5M | — | August 31, 2026 |
| 2 | iShares Russell 2000 ETF | 0.92% | 902K | $3.8M | −10,368 (−1.1%) | September 30, 2026 |
| 3 | Avantis US Small Cap Value ETF | 0.62% | 609K | $2.6M | — | September 30, 2026 |
| 4 | Aegis Value I | 0.50% | 491K | $2.1M | — | June 30, 2026 |
| 5 | DFA US Small Cap Value I | 0.49% | 478K | $2.0M | — | August 31, 2026 |
| 6 | Formidable ETF | 0.42% | 411K | $1.7M | — | September 30, 2026 |
| 7 | DFA US Small Cap I | 0.42% | 407K | $1.7M | — | August 31, 2026 |
| 8 | EA Bridgeway Omni Small-Cap Value ETF | 0.41% | 402K | $1.7M | — | September 30, 2026 |
| 9 | Fidelity Small Cap Index | 0.38% | 370K | $1.6M | −456 (−0.1%) | July 31, 2026 |
| 10 | Goldman Sachs Small Cp Val Insghts Instl | 0.38% | 368K | $1.6M | +162,109 (+78.7%) | July 31, 2026 |
| 11 | Dimensional US Small Cap ETF | 0.33% | 321K | $1.4M | — | September 30, 2026 |
| 12 | Adara Smaller Companies | 0.33% | 319K | $1.4M | — | August 31, 2026 |
| 13 | iShares Russell 2000 Value ETF | 0.30% | 294K | $1.2M | +446 (+0.2%) | September 30, 2026 |
| 14 | Dimensional US Targeted Value ETF | 0.23% | 225K | $950,743 | −3,360 (−1.5%) | September 30, 2026 |
| 15 | DFA US Targeted Value I | 0.22% | 216K | $914,429 | −19,910 (−8.4%) | August 31, 2026 |
| 16 | Dimensional US Small Cap Value ETF | 0.22% | 214K | $903,579 | — | September 24, 2026 |
| 17 | Bridgeway Omni Small-Cap Value N | 0.22% | 211K | $892,530 | — | June 30, 2026 |
| 18 | Vanguard Russell 2000 ETF | 0.21% | 202K | $856,507 | +777 (+0.4%) | September 30, 2026 |
| 19 | DFA US Micro Cap I | 0.20% | 192K | $810,620 | +6,900 (+3.7%) | August 31, 2026 |
| 20 | Fidelity Extended Market Index | 0.18% | 176K | $742,758 | −944 (−0.5%) | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
ACTG insider transactions
latest 1| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2025-06-11 | Isaac T Kohlberg | Sell | $3.84 | 16,000 | $61,440 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
ACTG shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns ACTG
Institutional investors own 89.1% of Acacia Research's shares and insiders 1.64%. The largest holder is Starboard Value LP with 62.64% of the shares (61.1M), as of June 30, 2026. Among the top 20 institutions, 13 added shares and 5 reduced their stake in the latest filings. Short interest is 5.01% of the float, or 9.24 days of average trading volume. The share count rose 94.9% since 2014.
Related: ACTG analyst forecast, ACTG key metrics. See the ACTG stock overview for the latest quote and news.
ACTG ownership FAQ
Who owns the most Acacia Research stock?
The largest shareholders of Acacia Research are Starboard Value LP (62.64%), State Street Corp (3.25%), Dimensional Fund Advisors, Inc. (3.01%), BlackRock Inc (2.66%), Vanguard Capital Management, LLC (1.52%).
What percentage of Acacia Research is owned by institutions?
Institutions hold 89.1% of Acacia Research's shares outstanding; insiders hold 1.64%.
Which funds own Acacia Research?
The largest fund holders of Acacia Research are Vanguard MStar Total Stk Mkt Idx Invest (1.09%), iShares Russell 2000 ETF (0.92%), Avantis US Small Cap Value ETF (0.62%), Aegis Value I (0.50%), DFA US Small Cap Value I (0.49%).
What is Acacia Research's short interest?
1.8M shares of Acacia Research were sold short, 5.01% of the float; at the average daily volume it would take 9.24 days to cover.
Are insiders buying or selling Acacia Research?
Of the latest 1 reported insider transactions in Acacia Research (since June 11, 2025), 0 were purchases and 1 were sales.
How many shares of Acacia Research are outstanding?
Acacia Research has 97.6M shares outstanding, of which 34.9M are in the public float.