OSG
Octave Specialty Group, Inc. · Financial Services · Insurance - Specialty
Momentum inputs (comparable managers):
holder breadth -6.7% ·
share flow +3.2% ·
net new positions -7.1%
— formula
Concentrated accumulation — rising shares among fewer holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q2 2025
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 63 | -1 | 16.53M | $103.10M | +6 | −7 |
| Q1 2026 | 66 | +3 | 17.21M | $80.13M | +9 | −7 |
| Q4 2025 | 64 | +2 | 20.99M | $163.30M | +3 | — |
| Q3 2025 | 15 | -1 | 13.08M | $109.08M | — | −2 |
| Q2 2025 | 14 | -1 | 14.28M | $101.37M | +1 | −2 |
| Q1 2025 | 12 | -1 | 5.14M | $45.01M | — | −1 |
| Q4 2024 | 13 | +1 | 4.89M | $61.81M | +1 | — |
| Q3 2024 | 11 | +1 | 3.82M | $42.83M | +1 | — |
| Q2 2024 | 10 | — | 3.41M | $43.67M | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 4.59M | — | $32.58M | 0.0% | n/c | 1 | SEC ↗ |
| 2 | BlackRock ✦ (passive) | 4.59M | — | $32.58M | 0.0% | n/c | 1 | SEC ↗ |
| 3 | BlackRock ✦ (passive) | 4.59M | — | $32.58M | 0.0% | n/c | 1 | SEC ↗ |
| 4 | BlackRock ✦ (passive) | 4.59M | — | $32.58M | 0.0% | n/c | 1 | SEC ↗ |
| 5 | BlackRock ✦ (passive) | 4.59M | — | $32.58M | 0.0% | n/c | 1 | SEC ↗ |
| 6 | BlackRock ✦ (passive) | 4.59M | — | $32.58M | 0.0% | n/c | 1 | SEC ↗ |
| 7 | BlackRock ✦ (passive) | 4.59M | — | $32.58M | 0.0% | n/c | 1 | SEC ↗ |
| 8 | BlackRock ✦ (passive) | 4.59M | — | $32.58M | 0.0% | n/c | 1 | SEC ↗ |
| 9 | BlackRock ✦ (passive) | 4.59M | — | $32.58M | 0.0% | n/c | 1 | SEC ↗ |
| 10 | The Vanguard Group ✦ (passive) | 2.57M | — | $18.24M | 0.0% | n/c | 1 | SEC ↗ |
| 11 | The Vanguard Group ✦ (passive) | 2.57M | — | $18.24M | 0.0% | n/c | 1 | SEC ↗ |
| 12 | The Vanguard Group ✦ (passive) | 2.57M | — | $18.24M | 0.0% | n/c | 1 | SEC ↗ |
| 13 | Fidelity (FMR) ✦ | 1.53M | — | $10.88M | 0.0% | n/c | 1 | SEC ↗ |
| 14 | Fidelity (FMR) ✦ | 1.53M | — | $10.88M | 0.0% | n/c | 1 | SEC ↗ |
| 15 | Fidelity (FMR) ✦ | 1.53M | — | $10.88M | 0.0% | n/c | 1 | SEC ↗ |
| 16 | Geode Capital Management ✦ (passive) | 1.12M | +2.5% | $7.97M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 17 | Geode Capital Management ✦ (passive) | 1.12M | +2.5% | $7.97M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 18 | Citadel Advisors ✦ | 1.12M | +1.4% | $7.94M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 19 | Citadel Advisors ✦ | 1.12M | +1.4% | $7.94M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 20 | Millennium Management ✦ | 996.04K | +95.8% | $7.07M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 21 | State Street Global Advisors ✦ (passive) | 958.86K | -7.1% | $6.81M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 22 | Marshall Wace ✦ | 648.15K | +215.6% | $4.60M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 23 | Marshall Wace ✦ | 648.15K | +215.6% | $4.60M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 24 | D. E. Shaw & Co. ✦ | 335.65K | -18.4% | $2.38M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 25 | D. E. Shaw & Co. ✦ | 335.65K | -18.4% | $2.38M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 26 | Renaissance Technologies ✦ | 186.10K | +8.5% | $1.32M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 27 | Norges Bank ✦ (passive) | 75.00K | -71.5% | $532,500 | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 28 | T. Rowe Price ✦ | 52.20K | +6.8% | $371,000 | 0.0% | ▲ Add | 5 | SEC ↗ |
| 29 | AQR Capital Management ✦ | 51.30K | New | $364,229 | 0.0% | New | 1 | SEC ↗ |
| 30 | AQR Capital Management ✦ | 51.30K | New | $364,229 | 0.0% | New | 1 | SEC ↗ |
| 31 | AQR Capital Management ✦ | 51.30K | New | $364,229 | 0.0% | New | 1 | SEC ↗ |
| 32 | AQR Capital Management ✦ | 51.30K | New | $364,229 | 0.0% | New | 1 | SEC ↗ |
| 33 | Two Sigma Investments ✦ | 43.92K | -65.0% | $311,853 | 0.0% | ▼ Trim | 4 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| AQR Capital Management | $364,229 | 0.0% |
| AQR Capital Management | $364,229 | 0.0% |
| AQR Capital Management | $364,229 | 0.0% |
| AQR Capital Management | $364,229 | 0.0% |
Exited
| Arrowstreet Capital | $1.28M | was 0.0% |
| Point72 Asset Management | $289,625 | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 147 holders, 32.27M shares, $149.22M reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.