MTRN
Materion Corporation · Basic Materials · Industrial Materials
Momentum inputs (comparable managers):
holder breadth +5.9% ·
share flow +3.5% ·
net new positions +5.6%
— 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 | 114 | +8 | 14.64M | $4.35B | +14 | −5 |
| Q1 2026 | 108 | +4 | 14.24M | $2.05B | +8 | −4 |
| Q4 2025 | 103 | -1 | 15.23M | $1.89B | +1 | −2 |
| Q3 2025 | 19 | -1 | 8.80M | $1.06B | — | −2 |
| Q2 2025 | 18 | +1 | 8.08M | $641.67M | +1 | — |
| Q1 2025 | 14 | +3 | 2.09M | $170.54M | +3 | — |
| Q4 2024 | 11 | -1 | 1.95M | $193.18M | — | −1 |
| Q3 2024 | 11 | +2 | 981.22K | $109.77M | +3 | −1 |
| Q2 2024 | 9 | — | 988.09K | $106.85M | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 3.33M | — | $264.12M | 0.0% | n/c | 1 | SEC ↗ ×17 |
| 2 | The Vanguard Group ✦ (passive) | 2.39M | — | $189.37M | 0.0% | n/c | 1 | SEC ↗ ×5 |
| 3 | State Street Global Advisors ✦ (passive) | 1.30M | +28.0% | $103.10M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 4 | Geode Capital Management ✦ (passive) | 487.19K | +2.2% | $38.67M | 0.0% | ▲ Add | 5 | SEC ↗ ×2 |
| 5 | GAMCO Investors ✦ | 187.15K | -0.3% | $14.85M | 0.1% | ▼ Trim | 5 | SEC ↗ |
| 6 | Fisher Asset Management ✦ | 127.17K | -19.8% | $10.09M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 7 | Citadel Advisors ✦ | 79.09K | +528.5% | $6.28M | 0.0% | ▲ Add | 5 | SEC ↗ ×2 |
| 8 | Millennium Management ✦ | 59.10K | -33.8% | $4.69M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 9 | D. E. Shaw & Co. ✦ | 47.97K | -32.2% | $3.81M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 10 | T. Rowe Price ✦ | 17.44K | +10.5% | $1.39M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 11 | Marshall Wace ✦ | 17.05K | New | $1.35M | 0.0% | New | 1 | SEC ↗ ×2 |
| 12 | AQR Capital Management ✦ | 14.09K | +470.6% | $1.12M | 0.0% | ▲ Add | 2 | SEC ↗ ×4 |
| 13 | Renaissance Technologies ✦ | 12.40K | -61.6% | $984,188 | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 14 | Point72 Asset Management ✦ | 10.45K | +3441.0% | $829,138 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 15 | Fidelity (FMR) ✦ | 4.53K | — | $359,434 | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 16 | Gotham Asset Management ✦ | 4.33K | -16.9% | $344,069 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 17 | Norges Bank ✦ (passive) | 3.09K | -86.1% | $245,571 | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 18 | ARK Investment Management ✦ | 901 | +11.7% | $71,512 | 0.0% | ▲ Add | 4 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Marshall Wace | $1.35M | 0.0% |
Exited
| No tracked exits this quarter. |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 328 holders, 19.47M shares, $2.78B 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.
Open-market purchases (P)
No open-market insider purchases in our coverage window.
Open-market sales (S)
Director · 2.00K sh · $470,322
Officer, Director · 11.17K sh · $3.24M
Officer, Director · 3.75K sh · $1.10M
Officer, Director · 2.34K sh · $686,248
Officer, Director · 4.87K sh · $1.43M
Officer, Director · 286 sh · $84,419
Officer, Director · 267 sh · $78,296
Officer, Director · 287 sh · $82,739
Officer, Director · 1.38K sh · $395,544
Director · 3.71K sh · $1.08M
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology