ZBIO
Zenas BioPharma, Inc. · Healthcare · Biotechnology
Momentum inputs (comparable managers):
holder breadth +30.0% ·
share flow +5.0% ·
net new positions +20.0%
· formula
Broad accumulation: rising shares across more 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 | 58 | +3 | 32.34M | $814.38M | +8 | −5 |
| Q1 2026 | 57 | 0 | 27.25M | $547.68M | +9 | −9 |
| Q4 2025 | 56 | +4 | 18.00M | $649.25M | +4 | n/a |
| Q3 2025 | 12 | 0 | 9.51M | $211.12M | +1 | −1 |
| Q2 2025 | 10 | +3 | 7.80M | $75.56M | +3 | n/a |
| Q1 2025 | 4 | -5 | 2.01M | $15.92M | n/a | −5 |
| Q4 2024 | 9 | -1 | 2.55M | $20.73M | +1 | −2 |
| Q3 2024 | 9 | +9 | 2.41M | $40.14M | +9 | n/a |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Fidelity (FMR) ✦ | 3.32M | n/a | $32.21M | 0.0% | n/c | 1 | SEC ↗ ×3 |
| 2 | BlackRock ✦ (passive) | 1.10M | n/a | $10.62M | 0.0% | n/c | 1 | SEC ↗ ×6 |
| 3 | The Vanguard Group ✦ (passive) | 992.21K | n/a | $9.61M | 0.0% | n/c | 1 | SEC ↗ ×3 |
| 4 | Wellington Management ✦ | 878.92K | +0.6% | $8.52M | 0.0% | ▲ Add | 4 | SEC ↗ ×3 |
| 5 | T. Rowe Price ✦ | 485.20K | -6.3% | $4.70M | 0.0% | ▼ Trim | 4 | SEC ↗ ×2 |
| 6 | Geode Capital Management ✦ (passive) | 373.62K | +4.6% | $3.62M | 0.0% | ▲ Add | 4 | SEC ↗ ×2 |
| 7 | State Street Global Advisors ✦ (passive) | 310.24K | +16.5% | $3.01M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 8 | Citadel Advisors ✦ | 293.79K | New | $2.85M | 0.0% | New | 1 | SEC ↗ |
| 9 | AQR Capital Management ✦ | 24.67K | New | $239,033 | 0.0% | New | 1 | SEC ↗ ×5 |
| 10 | Two Sigma Investments ✦ | 19.62K | New | $190,089 | 0.0% | New | 1 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value: the conviction measure. ✦ = curated manager.
New buyers
| Citadel Advisors | $2.85M | 0.0% |
| AQR Capital Management | $239,033 | 0.0% |
| Two Sigma Investments | $190,089 | 0.0% |
Exited
| No tracked exits this quarter. |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 138 holders, 55.37M shares, $1.09B 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.