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MATTERN CAPITAL MANAGEMENT, LLC
Updated 3 days agoManaged by Mattern Capital Management, Llc • Latest filing Q3 2026
Portfolio value
$855.9M
Q3 2026
Filings
4
Quarterly 13F history
Top-10 concentration
100.0%
Weight of largest holdings
Annualized return
—
Implied from 13F holdings
Portfolio value history
13F-disclosed portfolio value over 4 quarters
Show data table
| Period | Portfolio value |
|---|---|
| Q4 2025 | $846.9M |
| Q1 2026 | $834.9M |
| Q2 2026 | $856.7M |
| Q3 2026 | $855.9M |
Top holdings
166 positions as of Q3 2026
| # | Stock | Value | Shares | % Portfolio | Change |
|---|---|---|---|---|---|
| 1 | $23.7M | 71.1K | 2.77% | — | |
| 2 | $19.7M | 38.4K | 2.30% | — | |
| 3 | $14M | 11.2K | 1.63% | — | |
| 4 | $13.1M | 43.7K | 1.53% | — | |
| 5 | $13.1M | 14.4K | 1.53% | — | |
| 6 | $12.5M | 35.7K | 1.47% | — | |
| 7 | $12.5M | 33.9K | 1.45% | — | |
| 8 | $12.3M | 47.6K | 1.44% | — | |
| 9 | $12M | 107.7K | 1.41% | — | |
| 10 | $11.8M | 43.8K | 1.38% | — | |
| 11 | $11.4M | 24.1K | 1.34% | — | |
| 12 | $11.3M | 34.8K | 1.32% | — | |
| 13 | $11.2M | 26.6K | 1.31% | — | |
| 14 | $11.1M | 10.5K | 1.29% | — | |
| 15 | $11M | 9.5K | 1.29% | — | |
| 16 | $11M | 109.2K | 1.29% | — | |
| 17 | $11M | 39.3K | 1.29% | — | |
| 18 | $10.9M | 32.9K | 1.28% | — | |
| 19 | $10.8M | 58.8K | 1.27% | — | |
| 20 | $10.6M | 23.8K | 1.24% | — |