Long-term investor
Mattern Capital Management, LLC @matterncapitalmanagement
Institutional investment manager. Holdings disclosed quarterly to the SEC on Form 13F (CIK 0001803227).
Record
- Tracked since 2025-06-30 (449 days), 58 trades recorded
- Returns: week n/a · month n/a · 90 days 0.0% · 6 months +4.4% · 1 year n/a · all +2.0%
- Max drawdown n/a · win rate 38% · data quality High
- Source: SEC 13F Filings (live) (SEC EDGAR; typical delay 45 days)
Open positions
- AAPL · 2.6% · long · since 2025-06-30
- GWW · 1.9% · long · since 2025-06-30
- MSFT · 1.8% · long · since 2025-06-30
- UNH · 1.7% · long · since 2025-06-30
- COST · 1.6% · long · since 2025-06-30
- AVGO · 1.6% · long · since 2025-06-30
- COR · 1.5% · long · since 2025-06-30
- AFL · 1.5% · long · since 2025-06-30
- CSCO · 1.5% · long · since 2025-06-30
- LIN · 1.4% · long · since 2025-06-30
- CB · 1.4% · long · since 2025-06-30
- LLY · 1.4% · long · since 2025-06-30