IBB
iShares Biotechnology ETF · Financial Services · Asset Management
Momentum inputs (comparable managers): holder breadth 0.0% · share flow -24.1% · net new positions 0.0% — formula
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q2 2025
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 83 | -2 | 30.99M | $5.89B | +5 | −7 |
| Q1 2026 | 86 | -2 | 32.07M | $5.40B | +4 | −6 |
| Q4 2025 | 87 | +2 | 31.81M | $5.28B | +2 | — |
| Q3 2025 | 12 | 0 | 8.03M | $1.16B | +2 | −2 |
| Q2 2025 | 9 | 0 | 315.48K | $39.91M | +2 | −2 |
| Q1 2025 | 7 | +1 | 400.58K | $51.23M | +2 | −1 |
| Q4 2024 | 6 | +1 | 526.12K | $69.56M | +2 | −1 |
| Q3 2024 | 5 | -2 | 433.42K | $63.11M | — | −2 |
| Q2 2024 | 7 | — | 747.92K | $102.66M | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Citadel Advisors ✦ | 158.38K | +847.4% | $20.04M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 2 | Millennium Management ✦ | 108.40K | +160.1% | $13.71M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 3 | Wellington Management ✦ | 21.31K | New | $2.70M | 0.0% | New | 1 | SEC ↗ |
| 4 | Fidelity (FMR) ✦ | 12.69K | — | $1.61M | 0.0% | n/c | 1 | SEC ↗ |
| 5 | AQR Capital Management ✦ | 5.36K | +50.8% | $678,473 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 6 | T. Rowe Price ✦ | 3.61K | 0.0% | $458,000 | 0.0% | Held | 5 | SEC ↗ |
| 7 | BlackRock ✦ (passive) | 2.31K | — | $291,732 | 0.0% | n/c | 1 | SEC ↗ |
| 8 | BlackRock ✦ (passive) | 2.31K | — | $291,732 | 0.0% | n/c | 1 | SEC ↗ |
| 9 | Fisher Asset Management ✦ | 2.27K | -5.7% | $286,829 | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 10 | Marshall Wace ✦ | 1.15K | New | $145,107 | 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
| Wellington Management | $2.70M | 0.0% |
| Marshall Wace | $145,107 | 0.0% |
Exited
| Two Sigma Investments | $35.53M | was 0.1% |
| D. E. Shaw & Co. | $7.01M | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 912 holders, 39.27M shares, $6.31B 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.