CIK: 0001999898
Total reported value
$124.6M
Reporting period: 2026-03-31 · Number of holdings: 82
Kampmann Melissa S. disclosed 82 holdings in its latest 13F filing for the period ending 2026-03-31, with total reported value of $124.6M and a quarterly turnover rate of 15.9%.
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Kampmann Melissa S.'s disclosed holdings carry a Herfindahl concentration index of 0.033 — mathematically equivalent to about 30 equally-sized positions, well below its 82 actual disclosed holdings. That gap points to a strategy built around a small core of high-conviction bets rather than broad diversification.
Position sizes are fairly uniform across the portfolio (a coefficient of variation of 0.65), suggesting a disciplined, rules-based approach to how much capital goes into each idea.
No strong tilt toward either adding to existing winners or initiating outsized new positions was observed in the latest reported quarter.
Sector classification currently covers about 68% of this portfolio's disclosed value; the remainder includes holdings (e.g. unmapped tickers, options, or other security types) not yet covered by our sector mapping.
Add GEV
-0.2% $905.6K
Trim BX
-16.5% -$1.3M
Trim WDAY
-35.9% -$1.2M
Trim SPGI
-18.1% -$1.3M
Add CVX
-0.4% $711.2K
Add JNJ
-0.7% $535.0K
Showing top 43 holdings (of 82 total)
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | GOOG | Alphabet Inc-cl C | Stock-Comm Services | 5.90% | -0.38% | -0.87% | |
| 2 | LLY | Eli Lilly & Co | Stock-Healthcare | 5.80% | -0.52% | -0.78% | |
| 3 | AAPL | Apple INC | Stock-Tech | 5.26% | +0.50% | -0.71% | |
| 4 | WMT | Walmart INC | Stock-Consumer Staples | 4.69% | +0.49% | -1.18% | |
| 5 | JPM | Jpmorgan Chase & Co | Stock-Financials | 4.41% | +0.21% | -0.53% | |
| 6 | JNJ | Johnson & Johnson | Stock-Healthcare | 4.20% | +0.73% | -0.65% | |
| 7 | MSFT | Microsoft CORP | Stock-Tech | 4.03% | -0.45% | -0.59% | |
| 8 | FAST | Fastenal Co | Stock-Industrials | 3.65% | +0.43% | +0.47% | |
| 9 | ROK | Rockwell Automation INC | Stock-Industrials | 3.55% | -0.29% | -0.44% | |
| 10 | UBER | Uber Technologies INC | Stock-Industrials | 3.46% | -0.50% | -5.73% | |
| 11 | SYK | Stryker CORP | Stock-Healthcare | 3.27% | -0.08% | -0.60% | |
| 12 | MA | Mastercard INC - A | Stock-Financials | 3.21% | +0.07% | -0.62% | |
| 13 | AMZN | Amazon.com INC | Stock-Consumer Disc | 3.18% | -0.09% | -0.52% | |
| 14 | GEV | GE Vernova INC | Stock-Industrials | 3.12% | +0.92% | -0.22% | |
| 15 | CVX | Chevron CORP | Stock-Energy | 2.99% | +0.76% | -0.41% | |
| 16 | PG | Procter & Gamble Co/the | Stock-Consumer Staples | 2.97% | +0.20% | — | |
| 17 | ECL | Ecolab INC | Stock-Materials | 2.85% | +0.08% | -0.22% | |
| 18 | GNRC | Generac Holdings INC | Stock-Industrials | 2.23% | +0.41% | -0.28% | |
| 19 | IRTC | Irhythm Holdings INC | Stock-Healthcare | 2.08% | -0.66% | -2.70% | |
| 20 | ICE | Intercontinental Exchange In | Stock-Financials | 2.06% | -0.21% | -8.89% | |
| 21 | ISRG | Intuitive Surgical INC | Stock-Healthcare | 2.02% | -0.09% | — | |
| 22 | RBA | Rb Global INC | Stock-Industrials | 1.94% | -0.29% | -3.53% | |
| 23 | SPGI | S&p Global INC | Stock-Financials | 1.91% | -0.78% | -18.14% | |
| 24 | AON | Aon plc | Stock-Financials | 1.91% | -0.18% | -13.32% | |
| 25 | DXCM | Dexcom INC | Stock-Healthcare | 1.85% | -0.11% | — | |
| 26 | HD | Home Depot INC | Stock-Consumer Disc | 1.79% | -0.16% | -1.46% | |
| 27 | BX | Blackstone INC | Stock-Financials | 1.72% | -0.85% | -16.52% | |
| 28 | COST | Costco Wholesale CORP | Stock-Consumer Staples | 1.49% | +0.41% | +25.68% | |
| 29 | ORCL | Oracle CORP | Stock-Tech | 1.39% | -0.14% | -1.22% | |
| 30 | BIV | Vanguard Intermediate-term B | ETF-Other | 1.26% | +0.10% | +0.54% | |
| 31 | WM | Waste Management INC | Stock-Industrials | 1.21% | +0.15% | +3.62% | |
| 32 | WEC | Wec Energy Group INC | Stock-Utilities | 1.09% | +0.14% | — | |
| 33 | TOST | Toast Inc-class A | Stock-Tech | 1.06% | -0.18% | -1.19% | |
| 34 | CRM | Salesforce INC | Stock-Tech | 0.99% | -0.12% | -2.65% | |
| 35 | BA | Boeing Co/the | Stock-Industrials | 0.99% | +0.69% | +280.62% | |
| 36 | NOW | Servicenow INC | Stock-Tech | 0.97% | +0.19% | +37.34% | |
| 37 | AGG | Ishares Core U.s. Aggregate | ETF-Other | 0.84% | +0.06% | — | |
| 38 | SBUX | Starbucks CORP | Stock-Consumer Disc | 0.83% | — | — | |
| 39 | WDAY | Workday Inc-class A | Stock-Tech | 0.81% | -0.83% | -35.86% | |
| 40 | CNI | Canadian Natl Railway Co | Stock-Industrials | 0.31% | +0.01% | -7.61% | |
| 41 | XYL | Xylem INC | Stock-Industrials | 0.30% | -0.04% | -3.82% | |
| 42 | NVDA | Nvidia CORP | Stock-Tech | 0.22% | +0.22% | NEW | |
| 43 | MDLN | Medline Inc-cl A | Stock-Other | 0.19% | +0.19% | NEW |
Performance for Q3 2026
+0.7%
Performance Last 4 Quarters
+4.2%
Based on 68% of reported portfolio value with available pricing
| Period | Holdings | Total value | Stability | Top holdings |
|---|---|---|---|---|
| 2026-03-31 | 82 | $124.6M | 16 | |
| 2025-12-31 | 78 | $135.2M | 18 | |
| 2025-09-30 | 77 | $137.2M | 22 | |
| 2025-06-30 | 77 | $133.2M | 0 | |
| 2025-03-31 | 79 | $126.5M | 0 | |
| 2024-12-31 | 79 | $127.1M | 0 | |
| 2024-09-30 | 79 | $141.4M | 0 | |
| 2024-06-30 | 77 | $136.9M | 0 | |
| 2024-03-31 | 68 | $139.1M | 0 | |
| 2023-12-31 | 68 | $116.8M | 0 | |
| 2023-09-30 | 58 | $103.6M | 0 |
Kampmann Melissa S.'s most significant position changes for 2026-03-31: New buy: Nvidia CORP (NVDA); New buy: Medline Inc-cl A (MDLN); Trim: GE Vernova INC (GEV) — shares -0.22%; Trim: Blackstone INC (BX) — shares -16.52%; Trim: Workday Inc-class A (WDAY) — shares -35.86%.
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | GEV | GE Vernova INC | +0.9% | -0.22% | Trim |
| 2 | CVX | Chevron CORP | +0.8% | -0.41% | Trim |
| 3 | JNJ | Johnson & Johnson | +0.7% | -0.65% | Trim |
| 4 | BA | Boeing Co/the | +0.7% | +280.62% | Add |
| 5 | AAPL | Apple INC | +0.5% | -0.71% | Trim |
| 6 | WMT | Walmart INC | +0.5% | -1.18% | Trim |
| 7 | FAST | Fastenal Co | +0.4% | +0.47% | Add |
| 8 | COST | Costco Wholesale CORP | +0.4% | +25.68% | Add |
| 9 | GNRC | Generac Holdings INC | +0.4% | -0.28% | Trim |
| 10 | JPM | Jpmorgan Chase & Co | +0.2% | -0.53% | Trim |
| 11 | PG | Procter & Gamble Co/the | +0.2% | — | Unchanged |
| 12 | NOW | Servicenow INC | +0.2% | +37.34% | Add |
| 13 | WM | Waste Management INC | +0.2% | +3.62% | Add |
| 14 | WEC | Wec Energy Group INC | +0.1% | — | Unchanged |
| 15 | BIV | Vanguard Intermediate-term B | +0.1% | +0.54% | Add |
| 16 | ECL | Ecolab INC | +0.1% | -0.22% | Trim |
| 17 | MA | Mastercard INC - A | +0.1% | -0.62% | Trim |
| 18 | AGG | Ishares Core U.s. Aggregate | +0.1% | — | Unchanged |
| 19 | CNI | Canadian Natl Railway Co | 0% | -7.61% | Trim |
| 20 | SBUX | Starbucks CORP | — | — | Unchanged |
| 21 | XYL | Xylem INC | 0% | -3.82% | Trim |
| 22 | SYK | Stryker CORP | -0.1% | -0.60% | Trim |
| 23 | AMZN | Amazon.com INC | -0.1% | -0.52% | Trim |
| 24 | ISRG | Intuitive Surgical INC | -0.1% | — | Unchanged |
| 25 | DXCM | Dexcom INC | -0.1% | — | Unchanged |
| 26 | CRM | Salesforce INC | -0.1% | -2.65% | Trim |
| 27 | ORCL | Oracle CORP | -0.1% | -1.22% | Trim |
| 28 | HD | Home Depot INC | -0.2% | -1.46% | Trim |
| 29 | AON | Aon plc | -0.2% | -13.32% | Trim |
| 30 | TOST | Toast Inc-class A | -0.2% | -1.19% | Trim |
| 31 | ICE | Intercontinental Exchange In | -0.2% | -8.89% | Trim |
| 32 | ROK | Rockwell Automation INC | -0.3% | -0.44% | Trim |
| 33 | RBA | Rb Global INC | -0.3% | -3.53% | Trim |
| 34 | GOOG | Alphabet Inc-cl C | -0.4% | -0.87% | Trim |
| 35 | MSFT | Microsoft CORP | -0.5% | -0.59% | Trim |
| 36 | UBER | Uber Technologies INC | -0.5% | -5.73% | Trim |
| 37 | LLY | Eli Lilly & Co | -0.5% | -0.78% | Trim |
| 38 | IRTC | Irhythm Holdings INC | -0.7% | -2.70% | Trim |
| 39 | SPGI | S&p Global INC | -0.8% | -18.14% | Trim |
| 40 | WDAY | Workday Inc-class A | -0.8% | -35.86% | Trim |
| 41 | BX | Blackstone INC | -0.9% | -16.52% | Trim |
| 42 | NVDA | Nvidia CORP | — | NEW | New buy |
| 43 | MDLN | Medline Inc-cl A | — | NEW | New buy |
| Period | Filed | Type | EDGAR |
|---|---|---|---|
| 2026-03-31 | 2026-04-23 | 13F-HR | View on EDGAR |
| 2025-12-31 | 2026-01-26 | 13F-HR | View on EDGAR |
| 2025-09-30 | 2025-10-09 | 13F-HR | View on EDGAR |
| 2025-06-30 | 2025-07-24 | 13F-HR | View on EDGAR |
| 2025-03-31 | 2025-04-25 | 13F-HR | View on EDGAR |
| 2024-12-31 | 2025-02-11 | 13F-HR | View on EDGAR |
| 2024-09-30 | 2024-11-04 | 13F-HR | View on EDGAR |
| 2024-06-30 | 2024-08-16 | 13F-HR | View on EDGAR |
| 2024-03-31 | 2024-05-15 | 13F-HR | View on EDGAR |
| 2023-12-31 | 2024-02-22 | 13F-HR | View on EDGAR |
| 2023-09-30 | 2024-02-20 | Amendment | View on EDGAR |
| 2023-09-30 | 2023-11-20 | 13F-HR | View on EDGAR |
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