Ranked by reported Q2 2026 13F market value
Share of total reported institutional value in ACTG held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | Starboard Value LP | 61.1M | $284.8M | 0.0% | 63.282% | 6.30% |
| 2 | STATE STREET CORP | 3.2M | $14.8M | +2.0% | 3.279% | 0.00% |
| 3 | DIMENSIONAL FUND ADVISORS LP | 2.9M | $13.7M | +3.1% | 3.046% | 0.00% |
| 4 | BlackRock, Inc. | 2.6M | $12.1M | +7.9% | 2.689% | 0.00% |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | 1.5M | $6.9M | -7.0% | 1.538% | 0.00% |
| 6 | RENAISSANCE TECHNOLOGIES LLC | 1.4M | $6.6M | +0.5% | 1.465% | 0.01% |
| 7 | GOLDMAN SACHS GROUP INC | 1.2M | $5.5M | +101.2% | 1.217% | 0.00% |
| 8 | Krilogy Financial LLC | 1.1M | $5.3M | +0.0% | 1.168% | 0.16% |
| 9 | Peapod Lane Capital LLC | 995K | $4.6M | -8.8% | 1.030% | 3.13% |
| 10 | GEODE CAPITAL MANAGEMENT, LLC | 901K | $4.2M | +5.0% | 0.933% | 0.00% |
| 11 | Pacific Ridge Capital Partners, LLC | 811K | $3.8M | -0.8% | 0.840% | 0.69% |
| 12 | Formidable Asset Management, LLC | 793K | $3.7M | -5.5% | 0.821% | 0.59% |
| 13 | AMERICAN CENTURY COMPANIES INC | 693K | $3.2M | +35.6% | 0.718% | 0.00% |
| 14 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | 629K | $2.9M | +4.3% | 0.651% | 0.05% |
| 15 | AEGIS FINANCIAL CORP | 491K | $2.3M | 0.0% | 0.508% | 0.36% |
| 16 | Empowered Funds, LLC | 366K | $1.7M | +7.6% | 0.379% | 0.01% |
| 17 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 310K | $1.4M | +48.9% | 0.321% | 0.00% |
| 18 | NORTHERN TRUST CORP | 290K | $1.4M | +7.5% | 0.300% | 0.00% |
| 19 | VANGUARD PORTFOLIO MANAGEMENT LLC | 289K | $1.3M | +10.5% | 0.300% | 0.00% |
| 20 | CITADEL ADVISORS LLC | 250K | $1.2M | +7.1% | 0.258% | 0.00% |
| 21 | AQR CAPITAL MANAGEMENT LLC | 236K | $1.1M | +189.3% | 0.245% | 0.00% |
| 22 | VANGUARD FIDUCIARY TRUST CO | 235K | $1.1M | +6.3% | 0.244% | 0.00% |
| 23 | MORGAN STANLEY | 213K | $993K | -23.0% | 0.221% | 0.00% |
| 24 | FRANKLIN RESOURCES INC | 190K | $886K | +2.6% | 0.197% | 0.00% |
| 25 | CORSAIR CAPITAL MANAGEMENT, L.P. | 167K | $777K | 0.0% | 0.173% | 0.10% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in ACTG — a direct measure of their conviction.
Filings activity in ACTG during Q2 2026, grouped by how each filer changed its position.
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q2 2026 | 123 | +4.2% | 88.66% | +0.44 pp | $398M | 1.6% |
| Q1 2026 | 118 | +27% | 88.22% | +0.13 pp | $405M | +29% |
| Q4 2025 | 93 | +6.9% | 88.09% | +0.02 pp | $315M | +15% |
| Q3 2025 | 87 | +1.2% | 88.07% | +0.28 pp | $274M | 8.5% |
| Q2 2025 | 86 | 2.3% | 87.79% | +0.58 pp | $299M | +13% |
| Q1 2025 | 88 | 7.4% | 87.21% | 0.68 pp | $265M | 41% |
| Q4 2024 | 95 | 7.8% | 87.89% | +1.07 pp | $449M | +14% |
| Q3 2024 | 103 | — | 86.82% | — | $395M | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying ACTG stock.
Based on Q2 2026 13F filings, institutional ownership of Acacia Research Corporation stands at 88.7%, held across 123 reporting institutions.
Starboard Value LP is the largest reported institutional holder of ACTG, with approximately 61,123,595 shares worth $0.28B as of Q2 2026.
Yes — 3 widely-followed marquee investors appear among the top 25 institutional holders of ACTG, including RENAISSANCE TECHNOLOGIES LLC, SUSQUEHANNA INTERNATIONAL GROUP, LLP, CITADEL ADVISORS LLC.
Our composite Smart Money Score for ACTG is 70 out of 100 (Bullish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
16 institutions opened new positions in ACTG during Q2 2026, while 10 fully exited. 41 added to existing positions and 64 trimmed.
ACTG institutional ownership rose by 0.44 percentage points quarter-over-quarter, with a net change of +5 holders.
The top 10 institutions account for 90.1% of all reported 13F value in ACTG, and the top 25 account for 97.1%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Acacia Research Corporation (ACTG) Institutional Ownership