MDY
State Street SPDR S&P MIDCAP 400 ETF Trust · Financial Services · Asset Management - Global
Momentum inputs (comparable managers): holder breadth 0.0% · share flow +30.0% · net new positions 0.0% — formula
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q3 2024
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 88 | +8 | 15.28M | $10.73B | +12 | −4 |
| Q1 2026 | 81 | -7 | 15.76M | $9.71B | +2 | −9 |
| Q4 2025 | 88 | +3 | 16.59M | $10.01B | +4 | −1 |
| Q3 2025 | 13 | 0 | 3.63M | $2.17B | — | — |
| Q2 2025 | 10 | 0 | 116.59K | $66.05M | +1 | −1 |
| Q1 2025 | 7 | +2 | 354.07K | $188.89M | +2 | — |
| Q4 2024 | 5 | 0 | 444.95K | $253.44M | +2 | −2 |
| Q3 2024 | 5 | 0 | 164.85K | $93.91M | +2 | −2 |
| Q2 2024 | 5 | — | 119.95K | $64.18M | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Citadel Advisors ✦ | 121.62K | +146.7% | $69.28M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 2 | Citadel Advisors ✦ | 121.62K | +146.7% | $69.28M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 3 | D. E. Shaw & Co. ✦ | 26.28K | -2.0% | $14.97M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 4 | Two Sigma Investments ✦ | 15.60K | New | $8.89M | 0.0% | New | 1 | SEC ↗ |
| 5 | T. Rowe Price ✦ | 800 | -81.2% | $456,000 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 6 | AQR Capital Management ✦ | 550 | New | $313,578 | 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
| Two Sigma Investments | $8.89M | 0.0% |
| AQR Capital Management | $313,578 | 0.0% |
Exited
| Millennium Management | $20.77M | was 0.0% |
| Marshall Wace | $402,380 | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 1,436 holders, 24.61M shares, $14.78B 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.