SIBN
SI-BONE, Inc. · Healthcare · Medical - Devices
Momentum inputs (comparable managers):
holder breadth -30.0% ·
share flow -21.3% ·
net new positions -20.0%
— formula
Broad distribution — falling shares and fewer holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q3 2024
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 71 | -5 | 22.30M | $363.89M | +5 | −10 |
| Q1 2026 | 79 | +1 | 23.03M | $291.05M | +5 | −4 |
| Q4 2025 | 78 | 0 | 24.06M | $474.39M | — | — |
| Q3 2025 | 19 | +1 | 12.33M | $181.55M | +1 | — |
| Q2 2025 | 15 | +2 | 10.81M | $203.36M | +2 | — |
| Q1 2025 | 10 | +1 | 3.68M | $51.58M | +1 | — |
| Q4 2024 | 9 | +1 | 3.29M | $46.06M | +1 | — |
| Q3 2024 | 7 | -4 | 2.33M | $32.61M | — | −4 |
| Q2 2024 | 11 | — | 2.96M | $38.30M | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Wellington Management ✦ | 1.03M | +3.5% | $14.37M | 0.0% | ▲ Add | 2 | SEC ↗ ×5 |
| 2 | Geode Capital Management ✦ (passive) | 924.04K | +3.4% | $12.92M | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 3 | Two Sigma Investments ✦ | 135.85K | -41.4% | $1.90M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 4 | Citadel Advisors ✦ | 116.60K | -25.7% | $1.63M | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 5 | Marshall Wace ✦ | 61.16K | -70.7% | $855,044 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 6 | AQR Capital Management ✦ | 37.98K | +19.2% | $530,932 | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 7 | T. Rowe Price ✦ | 28.42K | +1.3% | $398,000 | 0.0% | ▲ Add | 2 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| No new tracked buyers this quarter. |
Exited
| Millennium Management | $3.10M | was 0.0% |
| Renaissance Technologies | $1.69M | was 0.0% |
| Bridgewater Associates | $398,994 | was 0.0% |
| D. E. Shaw & Co. | $204,229 | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 178 holders, 43.26M shares, $537.87M 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.
Open-market purchases (P)
No open-market insider purchases in our coverage window.
Open-market sales (S)
Officer · 1.73K sh · $33,754
Officer · 1.56K sh · $28,341
Officer · 34 sh · $617
Officer · 1.80K sh · $32,637
Officer · 1.30K sh · $23,664
Officer · 1.76K sh · $31,984
Director · 20.00K sh · $369,400
Director · 18.63K sh · $352,313
Director · 1.37K sh · $25,847
Officer, Director · 25.97K sh · $522,596
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology