William Mack & Associates, Inc. reported 638 positions worth $54.56M for the quarter ended Sep 30, 2026, up 34.4% on the prior quarter. It opened 594 new positions, added to 27, trimmed 13 and exited 1. Its largest holding is Apple Inc. at 18.8% of the portfolio.
Reported 13F market value at each quarter end. A change mixes trading with price moves in the positions held.
Dollar value of shares bought and sold each quarter, at that quarter’s price. It counts trading only, not price changes.
How many positions were opened, added to, trimmed or closed each quarter.
Share of reported value in each sector at every quarter end.
| Holding | Change | Change % | Trade Value | Weight |
|---|---|---|---|---|
| XOM ExxonMobil Holdings Corp | +3,890 | – | $633.06K | 1.16% |
| SPCX Space Exploration Technologies Corp | +2,795 | – | $421.71K | 0.773% |
| NVDA Nvidia Corp | +1,459 | +21.1% | $333.22K | 3.5% |
| IAU Ishares Gold Trust | +2,826 | – | $220.72K | 0.405% |
| QCOM Qualcomm Inc | +1,119 | – | $205.94K | 0.377% |
| ARES Ares Management Corp | +1,642 | – | $190.75K | 0.35% |
| VZ Verizon Communications Inc | +3,901 | – | $178.94K | 0.328% |
| CRWV CoreWeave, Inc. | +2,010 | – | $175.11K | 0.321% |
| AVGO Broadcom Inc. | +486 | – | $170.68K | 0.313% |
| BP Bp Plc | +3,769 | – | $165.79K | 0.304% |
| Holding | Change | Change % | Trade Value | Weight |
|---|---|---|---|---|
| AAPL Apple Inc. | -4,529 | -12.8% | $1.51M | 18.82% |
| AMAT Applied Materials Inc | -152 | -34.7% | $77.75K | 0.268% |
| TSLA Tesla, Inc. | -204 | -3.4% | $72.38K | 3.77% |
| GOOG Alphabet Inc. | -106 | -4.1% | $36.12K | 1.54% |
| JPM Jpmorgan Chase & Co | -97 | -2.6% | $32.09K | 2.2% |
| AMZN Amazon Com Inc | -124 | -1.1% | $30.89K | 4.92% |
| F Ford Motor Co | -2,295 | -6.8% | $27.68K | 0.698% |
| MS Morgan Stanley | -85 | -7.2% | $15.99K | 0.377% |
| ABBV AbbVie Inc. | -43 | -4.4% | $11.24K | 0.444% |
| GS Goldman Sachs Group Inc | -9 | -3.5% | $8.09K | 0.405% |
| Holding | Shares | Trade Value | Weight |
|---|---|---|---|
| XOM ExxonMobil Holdings Corp | +3,890 | $633.06K | 1.16% |
| SPCX Space Exploration Technologies Corp | +2,795 | $421.71K | 0.773% |
| IAU Ishares Gold Trust | +2,826 | $220.72K | 0.405% |
| QCOM Qualcomm Inc | +1,119 | $205.94K | 0.377% |
| ARES Ares Management Corp | +1,642 | $190.75K | 0.35% |
| VZ Verizon Communications Inc | +3,901 | $178.94K | 0.328% |
| CRWV CoreWeave, Inc. | +2,010 | $175.11K | 0.321% |
| AVGO Broadcom Inc. | +486 | $170.68K | 0.313% |
| BP Bp Plc | +3,769 | $165.79K | 0.304% |
| BKR Baker Hughes Co | +2,962 | $162.61K | 0.298% |
| Holding | Shares Sold | Trade Value | Prior Weight |
|---|---|---|---|
| USAU U.S. Gold Corp. | -90.0K | $0.00 | 0% |
| # | Activity | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | AAPL Apple Inc. | Technology | 30.8K | $10.27M | 18.82% | -4,529 | -12.8% | Reduced | 0% |
| 2 | MSFT Microsoft Corp | Technology | 11.6K | $5.95M | 10.91% | +90 | +0.8% | Added | 0% |
| 3 | AMZN Amazon Com Inc | Consumer Discretionary | 10.8K | $2.68M | 4.92% | -124 | -1.1% | Reduced | 0% |
| 4 | GOOGL Alphabet Inc. | Technology | 7,195 | $2.48M | 4.54% | +138 | +2.0% | Added | 0% |
| 5 | TSLA Tesla, Inc. | Consumer Discretionary | 5,798 | $2.06M | 3.77% | -204 | -3.4% | Reduced | 0% |
| 6 | ACN Accenture plc | Industrials | 11.2K | $2.05M | 3.75% | +13 | +0.1% | Added | 0% |
| 7 | NVDA Nvidia Corp | Technology | 8,362 | $1.91M | 3.5% | +1,459 | +21.1% | Added | 0% |
| 8 | META Meta Platforms, Inc. | Technology | 1,977 | $1.43M | 2.63% | +207 | +11.7% | Added | 0% |
| 9 | JPM Jpmorgan Chase & Co | Financial Services | 3,620 | $1.20M | 2.2% | -97 | -2.6% | Reduced | 0% |
| 10 | COKE Coca-Cola Consolidated, Inc. | Consumer Staples | 5,092 | $963.85K | 1.77% | +6 | +0.1% | Added | 0.01% |
| 11 | GOOG Alphabet Inc. | Technology | 2,459 | $838.01K | 1.54% | -106 | -4.1% | Reduced | 0% |
| 12 | MU Micron Technology Inc | Technology | 743 | $791.73K | 1.45% | +68 | +10.1% | Added | 0% |
| 13 | XOM ExxonMobil Holdings Corp | Energy | 3,890 | $633.06K | 1.16% | +3,890 | – | New | 0% |
| 14 | DTE Dte Energy Co | Utilities | 4,624 | $563.24K | 1.03% | +9 | +0.2% | Added | 0% |
| 15 | INTC Intel Corp | Technology | 4,506 | $541.75K | 0.993% | +94 | +2.1% | Added | 0% |
Tip. Select a row to see that position’s full history at William Mack & Associates.
As of its Q3 2026 13F filing, William Mack & Associates, Inc.’s five largest positions were Apple Inc. (AAPL) at 18.8%, Microsoft Corp (MSFT) at 10.9%, Amazon Com Inc (AMZN) at 4.9%, Alphabet Inc. (GOOGL) at 4.5%, Tesla, Inc. (TSLA) at 3.8% of the reported portfolio.
William Mack & Associates, Inc. reported a 13F portfolio worth $54.56M across 638 positions for Q3 2026. That is up 34.4% from the previous quarter.
Its largest purchases by value were ExxonMobil Holdings Corp ($633.06K), Space Exploration Technologies Corp ($421.71K), Nvidia Corp ($333.22K). It opened 594 new positions.
Its largest sales by value were Apple Inc. ($1.51M), Applied Materials Inc ($77.75K), Tesla, Inc. ($72.38K). It exited 1 positions entirely.
From the Form 13F-HR reports William Mack & Associates, Inc. files with the SEC each quarter, within 45 days of quarter end. A 13F lists long positions in US-listed equities and options; it excludes short positions, cash, bonds and most non-US holdings.
13F data reflects long positions in US-listed equities and options as reported to the SEC up to 45 days after quarter end. It excludes short positions, cash, bonds and most non-US securities, so it is not a complete picture of a manager’s assets.