Disciplined Growth Investors Portfolio - Sep 30, 2025
Disciplined Growth Investors, Fred Martin, has built a diversified portfolio of 64 publicly traded holdings with a total market value of $5.5B as of Sep 30, 2025. This comprehensive analysis examines the latest 13F filing data to understand the investment strategy and recent portfolio adjustments.
The portfolio demonstrates a diversified approach to stock selection, with the top holding representing 8.2% of the total portfolio value. The top 5 holdings account for 32.2% of the overall portfolio allocation.
Recent portfolio activity shows 10 significant position adjustments, indicating active portfolio management and strategic repositioning. These changes reflect the investor's response to market conditions and evolving investment thesis.
Portfolio Statistics
Top Holdings Analysis
The portfolio's top holdings reveal the investor's core investment thesis and sector preferences. The largest position in SUPER MICRO COMPUTER INC COM N (SMCI) represents 8.2% of the total portfolio, valued at $454.5M.
| Rank | Symbol | Company | Value | Portfolio % | Change |
|---|---|---|---|---|---|
| 1 | SMCI | SUPER MICRO COMPUTER INC COM N | $454.5M | 8.2% | -2.6% |
| 2 | PSTG | PURE STORAGE INC CL A | $432.5M | 7.8% | -5.4% |
| 3 | GRMN | GARMIN LTD SHS | $339.0M | 6.1% | -3.0% |
| 4 | ANET | ARISTA NETWORKS INC COM SHS | $280.2M | 5.1% | -5.3% |
| 5 | IDCC | INTERDIGITAL INC COM | $273.1M | 4.9% | -17.7% |
For a complete analysis of all holdings and detailed portfolio breakdown by sector and market cap, visit our comprehensive holdings page.
Recent Portfolio Activity
Recent portfolio adjustments provide insights into the investor's evolving strategy and market outlook.
The following table shows the top 10 most significant position changes from recent reporting periods (out of 192 total transactions), sorted by the magnitude of change.
For a complete history of all portfolio transactions and detailed activity analysis,
visit our comprehensive activity page.
| Symbol | Company | Quantity Change | Date | Action |
|---|---|---|---|---|
| ZETA | Zeta Global Holdings Corp. | +6,114,851 | Sep 30, 2025 | BUY |
| UAA | Under Armour, Inc. | -5,275,757 | Sep 30, 2025 | SELL |
| CTLP | Cantaloupe, Inc. | -2,705,474 | Sep 30, 2025 | SELL |
| WEAV | Weave Communications, Inc. | +1,265,453 | Sep 30, 2025 | BUY |
| SFIX | Stitch Fix, Inc. | -1,054,202 | Sep 30, 2025 | SELL |
| MDXG | MiMedx Group, Inc | +1,022,202 | Sep 30, 2025 | BUY |
| PRO | PROS Holdings, Inc. | -899,030 | Sep 30, 2025 | SELL |
| MTLS | Materialise NV | -882,683 | Sep 30, 2025 | SELL |
| DV | DoubleVerify Holdings, Inc. | +863,899 | Sep 30, 2025 | BUY |
| MCHP | Microchip Technology Incorporat | -828,583 | Sep 30, 2025 | SELL |
Investment Strategy Insights
Disciplined Growth Investors's investment approach can be analyzed through several key metrics. The portfolio's concentration in top holdings suggests a diversified investment strategy, with significant positions in companies that align with the investor's long-term thesis.
The largest position in SUPER MICRO COMPUTER INC COM N (SMCI) demonstrates strong conviction in this particular investment opportunity. Recent activity shows a decrease of 2.6% in this position, indicating active portfolio management and strategic positioning.
Portfolio turnover can be assessed through recent activity patterns. The 10 most significant transactions shown here (out of 192 total transactions) suggest a highly active approach to portfolio management, with frequent strategic adjustments and position changes.
Additional Analysis
Complete Holdings
View all 64 holdings with detailed analysis
Trading Activity
Track all portfolio transactions and position changes
Performance Metrics
Analyze profit, winning trades, and investment returns
Sector Allocation
Analyze portfolio breakdown by sector and industry
Disciplined Growth Investors's portfolio as of Sep 30, 2025 reflects a strategic approach to equity investing with 64 holdings valued at $5.5B. The concentrated position in SUPER MICRO COMPUTER INC COM N and other top holdings demonstrates the investor's confidence in specific investment themes and long-term value creation opportunities. Recent activity indicates ongoing portfolio optimization and strategic repositioning.
For the most current portfolio data and detailed analysis, refer to the latest SEC 13F filings and our comprehensive holdings and activity pages, which are updated regularly with the latest filing information.
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