SIBN
SI-BONE, Inc. · Healthcare · Medical - Devices
Momentum inputs (comparable managers):
holder breadth +11.1% ·
share flow +11.9% ·
net new positions +10.0%
· formula
Broad accumulation: rising shares across more holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q1 2025
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 70 | -5 | 21.53M | $351.34M | +5 | −11 |
| Q1 2026 | 79 | +1 | 23.03M | $291.05M | +5 | −4 |
| Q4 2025 | 78 | 0 | 24.06M | $474.39M | n/a | n/a |
| Q3 2025 | 19 | +1 | 12.33M | $181.55M | +1 | n/a |
| Q2 2025 | 15 | +2 | 10.81M | $203.36M | +2 | n/a |
| Q1 2025 | 10 | +1 | 3.68M | $51.58M | +1 | n/a |
| Q4 2024 | 9 | +1 | 3.29M | $46.06M | +1 | n/a |
| Q3 2024 | 7 | -4 | 2.33M | $32.61M | n/a | −4 |
| Q2 2024 | 11 | n/a | 2.96M | $38.30M | n/a | n/a |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | State Street Global Advisors ✦ (passive) | 1.08M | -3.2% | $15.17M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 2 | Geode Capital Management ✦ (passive) | 962.09K | +3.0% | $13.50M | 0.0% | ▲ Add | 4 | SEC ↗ ×2 |
| 3 | Wellington Management ✦ | 493.75K | -2.2% | $6.93M | 0.0% | ▼ Trim | 4 | SEC ↗ ×5 |
| 4 | Marshall Wace ✦ | 369.01K | +39.5% | $5.18M | 0.0% | ▲ Add | 4 | SEC ↗ ×3 |
| 5 | Millennium Management ✦ | 229.55K | New | $3.22M | 0.0% | New | 1 | SEC ↗ |
| 6 | Renaissance Technologies ✦ | 213.10K | +91.3% | $2.99M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 7 | Citadel Advisors ✦ | 145.53K | -34.4% | $2.04M | 0.0% | ▼ Trim | 4 | SEC ↗ ×2 |
| 8 | Two Sigma Investments ✦ | 118.04K | +69.2% | $1.66M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 9 | T. Rowe Price ✦ | 32.71K | +3.0% | $459,000 | 0.0% | ▲ Add | 4 | SEC ↗ |
| 10 | AQR Capital Management ✦ | 31.52K | +0.8% | $442,238 | 0.0% | ▲ Add | 4 | SEC ↗ ×5 |
“Their weight” = the position's share of that manager's reported 13F equity value: the conviction measure. ✦ = curated manager.
New buyers
| Millennium Management | $3.22M | 0.0% |
Exited
| No tracked exits this quarter. |
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, Director · 38.01K sh · $762,013
Officer · 1.73K sh · $33,754
Officer · 1.56K sh · $28,341
Officer · 1.30K sh · $23,664
Officer · 1.76K sh · $31,984
Officer · 1.80K sh · $32,637
Officer · 34 sh · $617
Director · 20.00K sh · $369,400
Director · 18.63K sh · $352,313
Director · 1.37K sh · $25,847
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology