What is SEC Form 13F? Ultimate Guide to Institutional Equity Filings
Learn how SEC Form 13F filings work, the $100M threshold, 45-day reporting lag, and how to track top hedge fund holdings.
CIK: 0001803227
Total reported value
$856.7M
$856.7M
170 檔
9.2%
According to the latest 13F quarterly dataset, Mattern Capital Management, LLC managed an equity portfolio of $856.7M at the end of Q1 2026, spanning 170 distinct U.S. exchange-listed positions.
In Q1 2026, Mattern Capital Management, LLC displayed an active expansion posture, initiating 9 new positions and adding to 83 existing holdings, outstripping position reductions.
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | AAPL | Apple Inc | Stock-Tech | 2.36% | +0.22% | +1.13% | |
| 2 | PSX | Phillips 66 | Stock-Energy | 1.93% | -1.20% | -2.05% | |
| 3 | MSFT | Microsoft CORP | Stock-Tech | 1.83% | -0.04% | +16.05% | |
| 4 | COST | Costco Wholesale CORP | Stock-Consumer Staples | 1.72% | -0.15% | -1.17% | |
| 5 | COR | Cencora Inc | Stock-Healthcare | 1.58% | -0.03% | -1.33% | |
| 6 | GWW | Ww Grainger Inc | Stock-Industrials | 1.57% | +0.31% | -1.85% | |
| 7 | WEC | Wec Energy Group Inc | Stock-Utilities | 1.52% | -0.10% | +29.14% | |
| 8 | NEE | Nextera Energy Inc | Stock-Utilities | 1.49% | -0.14% | -2.30% | |
| 9 | CMS | Cms Energy CORP | Stock-Utilities | 1.48% | -0.13% | +32.27% | |
| 10 | LOW | Lowe's Cos Inc | Stock-Consumer Disc | 1.47% | -0.06% | -2.50% | |
| 11 | AFL | Aflac Inc | Stock-Financials | 1.45% | +0.06% | +1.58% | |
| 12 | LHX | L3harris Technologies Inc | Stock-Industrials | 1.44% | -0.20% | -5.13% | |
| 13 | LIN | Linde plc | Stock-Materials | 1.43% | +0.01% | -0.87% | |
| 14 | AWK | American Water Works Co Inc | Stock-Utilities | 1.43% | -0.13% | +36.74% | |
| 15 | CB | Chubb Limited | Stock-Financials | 1.41% | +0.02% | -0.70% | |
| 16 | AVGO | Broadcom Inc | Stock-Tech | 1.38% | +0.17% | -1.47% | |
| 17 | GD | General Dynamics CORP | Stock-Industrials | 1.36% | +0.03% | -0.91% | |
| 18 | ATO | Atmos Energy CORP | Stock-Utilities | 1.32% | -0.13% | +2.02% | |
| 19 | WMT | Walmart Inc | Stock-Consumer Staples | 1.31% | -0.07% | -38.39% | |
| 20 | ABT | Abbott Laboratories | Stock-Healthcare | 1.30% | -0.15% | +48.78% | |
| 21 | MSI | Motorola Solutions Inc | Stock-Tech | 1.28% | -0.08% | — | |
| 22 | UNH | Unitedhealth Group Inc | Stock-Healthcare | 1.26% | +0.45% | +48.43% | |
| 23 | CEG | Constellation Energy | Stock-Utilities | 1.24% | -0.24% | +57.03% | |
| 24 | ROP | Roper Technologies Inc | Stock-Tech | 1.23% | -0.08% | +56.91% | |
| 25 | BR | Broadridge Financial Solutio | Stock-Tech | 1.22% | -0.16% | +41.37% | |
| 26 | FDS | Factset Research Systems Inc | Stock-Financials | 1.21% | +0.05% | +53.69% | |
| 27 | ADP | Automatic Data Processing | Stock-Tech | 1.20% | +0.11% | +35.35% | |
| 28 | INTU | Intuit Inc | Stock-Tech | 1.20% | -0.41% | +84.38% | |
| 29 | BLK | Blackrock Inc | Stock-Financials | 1.20% | -0.01% | -0.20% | |
| 30 | NJR | New Jersey Resources CORP | Stock-Utilities | 1.18% | -0.04% | -0.66% | |
| 31 | PAYX | Paychex Inc | Stock-Tech | 1.18% | +0.05% | +45.81% | |
| 32 | TT | Trane Technologies plc | Stock-Industrials | 1.18% | +0.12% | — | |
| 33 | WM | Waste Management Inc | Stock-Industrials | 1.17% | -0.02% | +779.95% | |
| 34 | PLD | Prologis Inc | Stock-Real Estate | 1.15% | -0.02% | -0.92% | |
| 35 | ACN | Accenture plc | Stock-Tech | 1.14% | -0.35% | +33.61% | |
| 36 | ECL | Ecolab Inc | Stock-Materials | 1.13% | +0.07% | -0.72% | |
| 37 | SHW | Sherwin-williams Co/the | Stock-Materials | 1.12% | +0.14% | +0.69% | |
| 38 | BRO | Brown & Brown Inc | Stock-Financials | 1.11% | +0.16% | +3.86% | |
| 39 | SPGI | S&p Global Inc | Stock-Financials | 1.11% | +0.04% | +4.03% | |
| 40 | MCD | Mcdonald's CORP | Stock-Consumer Disc | 1.11% | -0.10% | +0.12% | |
| 41 | ITW | Illinois Tool Works | Stock-Industrials | 1.11% | +0.04% | -0.49% | |
| 42 | ICE | Intercontinental Exchange In | Stock-Financials | 1.10% | -0.22% | -1.91% | |
| 43 | PEP | Pepsico Inc | Stock-Consumer Staples | 1.10% | -0.14% | +0.99% | |
| 44 | XYL | Xylem Inc | Stock-Industrials | 1.08% | +0.07% | +3.33% | |
| 45 | HD | Home Depot Inc | Stock-Consumer Disc | 1.07% | +0.17% | +0.26% | |
| 46 | TSCO | Tractor Supply Company | Stock-Consumer Disc | 1.07% | -0.02% | +1.73% | |
| 47 | CL | Colgate-palmolive Co | Stock-Consumer Staples | 1.06% | +0.06% | -1.28% | |
| 48 | LLY | Eli Lilly & Co | Stock-Healthcare | 1.06% | +0.37% | -1.51% | |
| 49 | SYK | Stryker CORP | Stock-Healthcare | 1.05% | +0.09% | +0.80% | |
| 50 | CTAS | Cintas CORP | Stock-Industrials | 1.05% | +0.06% | +1.43% |
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | WM | Waste Management Inc | +1.1% | +779.95% | Add |
| 2 | PSX | Phillips 66 | +0.6% | -2.05% | Trim |
| 3 | CMS | Cms Energy CORP | +0.5% | +32.27% | Add |
| 4 | WEC | Wec Energy Group Inc | +0.5% | +29.14% | Add |
| 5 | AWK | American Water Works Co Inc | +0.4% | +36.74% | Add |
| 6 | ROP | Roper Technologies Inc | +0.3% | +56.91% | Add |
| 7 | CEG | Constellation Energy | +0.3% | +57.03% | Add |
| 8 | ABT | Abbott Laboratories | +0.3% | +48.78% | Add |
| 9 | UNH | Unitedhealth Group Inc | +0.2% | +48.43% | Add |
| 10 | COST | Costco Wholesale CORP | +0.2% | -1.17% | Trim |
| 11 | INTU | Intuit Inc | +0.2% | +84.38% | Add |
| 12 | PAYX | Paychex Inc | +0.2% | +45.81% | Add |
| 13 | LIN | Linde plc | +0.2% | -0.87% | Trim |
| 14 | NJR | New Jersey Resources CORP | +0.2% | -0.66% | Trim |
| 15 | NEE | Nextera Energy Inc | +0.2% | -2.30% | Trim |
| 16 | FDS | Factset Research Systems Inc | +0.2% | +53.69% | Add |
| 17 | LHX | L3harris Technologies Inc | +0.2% | -5.13% | Trim |
| 18 | ATO | Atmos Energy CORP | +0.2% | +2.02% | Add |
| 19 | NFLX | Netflix Inc | +0.2% | +79.21% | Add |
| 20 | CHD | Church & Dwight Co Inc | +0.1% | +0.27% | Add |
| 21 | PEP | Pepsico Inc | +0.1% | +0.99% | Add |
| 22 | GWW | Ww Grainger Inc | +0.1% | -1.85% | Trim |
| 23 | AVLV | Avantis US Large Cap Value | +0.1% | +41.25% | Add |
| 24 | VNLA | Janus Henderson Short Durati | +0.1% | +39.91% | Add |
| 25 | TYL | Tyler Technologies Inc | +0.1% | +133.74% | Add |
| 26 | COP | Conocophillips | +0.1% | +2.85% | Add |
| 27 | MDLZ | Mondelez International Inc-a | +0.1% | +2.03% | Add |
| 28 | ADP | Automatic Data Processing | +0.1% | +35.35% | Add |
| 29 | CRM | Salesforce Inc | +0.1% | +119.42% | Add |
| 30 | CVX | Chevron CORP | +0.1% | +2.08% | Add |
| 31 | DUHP | Dimensional US High Profi Et | +0.1% | +49.13% | Add |
| 32 | CL | Colgate-palmolive Co | +0.1% | -1.28% | Trim |
| 33 | ITW | Illinois Tool Works | +0.1% | -0.49% | Trim |
| 34 | CB | Chubb Limited | +0.1% | -0.70% | Trim |
| 35 | IVV | Ishares Core S&p 500 ETF | +0.1% | +217.90% | Add |
| 36 | BR | Broadridge Financial Solutio | +0.1% | +41.37% | Add |
| 37 | PLD | Prologis Inc | +0.1% | -0.92% | Trim |
| 38 | ASML | ASML Holding N.V. | 0% | +2.46% | Add |
| 39 | DFIV | Dimensional International Va | 0% | +48.85% | Add |
| 40 | AVUV | Avantis US Small Cap Value | 0% | +36.90% | Add |
| 41 | TSM | Taiwan Semiconductor-sp Adr | 0% | +3.34% | Add |
| 42 | GD | General Dynamics CORP | 0% | -0.91% | Trim |
| 43 | WSO | Watsco Inc | 0% | +12.06% | Add |
| 44 | MCO | Moody's CORP | 0% | +47.10% | Add |
| 45 | RSG | Republic Services Inc | 0% | +17.23% | Add |
| 46 | ORLY | O'reilly Automotive Inc | 0% | +24.89% | Add |
| 47 | MCD | Mcdonald's CORP | 0% | +0.12% | Add |
| 48 | AFL | Aflac Inc | 0% | +1.58% | Add |
| 49 | DFAT | Dimensional US Target Value | 0% | +31.17% | Add |
| 50 | DFEV | Dimensional Emrg Mrkt Val | 0% | +56.22% | Add |
According to official SEC Form 13F filings, Mattern Capital Management, LLC reported a total U.S. public equity portfolio value of $856.7M across 170 disclosed positions in Q1 2026.
Expert Analysis & Guides for Tracking Wall Street Smart Money Movements
Learn how SEC Form 13F filings work, the $100M threshold, 45-day reporting lag, and how to track top hedge fund holdings.
In terms of portfolio concentration, the top 5 core holdings (including AAPL, PSX, MSFT) accounted for 9.2% of total reported equity market value during Q1 2026.
Top New Position Initiated
MSI
市值: $10.7M
Top Position Liquidated / Trimmed
APD
前期市值: $8.6M
During Q1 2026, Mattern Capital Management, LLC's top holdings by market value included AAPL (2.4%)、PSX (1.9%)、MSFT (1.8%). The largest single position, AAPL, represented 2.4% of total portfolio value.
In Q1 2026, Mattern Capital Management, LLC made 156 total portfolio adjustments, initiating 9 new buys, adding to 83 positions, trimming 55 holdings, and fully liquidating 9 stocks.
All holding records on this page are fetched directly from the U.S. Securities and Exchange Commission (SEC) EDGAR system (Form 13F-HR). AlphaSMO parses CUSIP identifiers and formats data into Schema.org-compliant datasets.
Understand SEC Form 4 insider disclosures for corporate officers, directors, and 10% owners to track executive transactions.
Understand Rule 144 restricted stock sale notices to spot planned insider liquidations before market sell pressure arrives.
Explore the 5% beneficial ownership threshold, 13D vs 13G filing differences, and recent SEC accelerated deadline rules.
Best practices for analyzing 13F quarterly changes without getting misled by stock splits, options, or market valuation drift.
Learn how AlphaSMO's flagship signal detects high-conviction stocks where 13F hedge funds and corporate insiders buy at the same time.